阅读说明：本技术 一种可透气的含有碘复合物亲水性抗菌抗病毒医用布 (Air-permeable hydrophilic antibacterial antiviral medical cloth containing iodine compound ) 是由 卢伍党 刘玺 陈峻 何斌 秦云 于 2021-01-14 设计创作，主要内容包括：一种可透气的含有碘复合物亲水性抗菌抗病毒医用布,主要组成包括：医用布和载药的溶媒体系,载药溶媒体系又包括碘复合物和载药辅料,所述的碘复合物主要是指蛋氨酸碘、聚乙烯吡咯烷酮碘、聚乙烯醇碘、聚乙二醇碘、聚醇醚碘等的一种或混合物,载药辅料主要由可挥发性溶剂、胶黏剂、稳定剂以及柔软剂组成,医用布包括脱脂棉布或亲水性无纺布等,基本的制备过程包括：载药溶媒体系配制,医用布压花或打孔,而后浸泡、喷涂或浸轧工艺处理,最后烘干或者晾干,避光保存,该载药用布主要可以作为口罩、防护服以及开放性伤口的防护层等。(A kind of ventilative hydrophilic antibiotic antiviral medical cloth containing iodine complex, the main composition includes: medical cloth and solvent system of medicine carrying, medicine carrying solvent system include iodine complex and medicine carrying auxiliary material again, iodine complex mainly refer to methionine iodine, polyvinylpyrrolidone iodine, polyvinyl alcohol iodine, polyethylene glycol iodine, polyalcohol ether iodine one or the mixture of etc., the medicine carrying auxiliary material mainly comprises volatile solvent, gluing agent, stabilizer and softener, medical cloth includes degrease cotton cloth or hydrophilic non-woven fabrics etc. basic preparation process includes: the cloth for carrying the medicine mainly can be used as a mask, a protective suit, a protective layer of an open wound and the like.)

1. The utility model provides a ventilative contains iodine complex hydrophilicity antibiotic antiviral medical cloth which characterized in that comprises solvent system and the medicine carrying cloth of medicine carrying, and the solvent system of medicine carrying includes: iodine compound and drug-carrying auxiliary materials:

wherein the iodine complex comprises: amino acid (methionine) iodine, polyvinylpyrrolidone iodine, polyvinyl alcohol iodine, polyethylene glycol iodine, polyalcohol ether iodine, and double-chain quaternary ammonium salt iodine, which can be one or mixture of two or more of them;

wherein, the medicine carrying auxiliary material comprises: volatile solvents, adhesives, stabilizers, and softeners;

wherein, cloth for medicine carrying includes: cotton cloth is made of degreased natural cotton fiber, and hydrophilic non-woven fabric is made of plant fiber, animal fiber or artificial fiber.

2. The drug-loaded solvent system of claim 1, which comprises the following components in parts by weight:

the dosage of the iodine complex accounts for 0.1-15% of the volume of the drug-carrying solvent system, preferably 1-10%, and most preferably 3-8%;

the dosage of the adhesive is not more than 10% of the volume of the drug-loaded solvent system;

the dosage of the stabilizer is not more than 1% of the volume of the drug-carrying solvent system;

the dosage of the softening agent is not more than 35% of the volume of the drug-loaded solvent system;

the balance being volatile solvent.

3. The cloth of claim 1, wherein the drug-loaded vehicle system,

the volatilizable solvents include: ethanol, water and isopropanol, wherein the ethanol, water and isopropanol can be one or a mixture of two or more of the ethanol, water and isopropanol;

the adhesive comprises: polyvinyl pyrrolidone, polyvinyl alcohol, vinyl acetate, polyether, polyamide, polyacrylate, a-cyanoacrylate, polyvinyl acetal, ethylene-vinyl acetate copolymer, which may be one or a mixture of two or more thereof;

a stabilizer: mainly inorganic iodides, including: potassium iodide, sodium iodide and potassium iodate, wherein the potassium iodide, the sodium iodide and the potassium iodate can be one or a mixture of two or more of the potassium iodide, the sodium iodide and the potassium iodate;

the softening agent comprises: propylene glycol, polyethylene glycol (PEG) series (molecular weight 200-4000), glycerol, poloxamer series, Tween series and span series, wherein the series can be one of the propylene glycol, the polyethylene glycol (PEG) series, or the mixture of two or more of the propylene glycol, the polyethylene glycol (PEG) series;

the cloth for carrying medicine comprises: non-woven fabrics formed by one or two or more of absorbent cotton cloth, terylene, viscose, chitosan, seaweed, bamboo fiber or silk fiber in different proportions need embossing or punching (10-40 meshes) before medicine loading.

4. The antibacterial and antiviral medical cloth as claimed in claim 1, wherein the size of the cotton absorbent cloth is 25 to 120g/m³The specification of the non-woven fabric is 25-120g/m³。

5. The antibacterial and antiviral medical cloth according to claim 1, which is composed of a drug-loaded vehicle system and a drug-loaded cloth, and is selected from any one of the following groups:

1) the drug-loaded solvent is: PEG 3005%

The polyethylene is 5 percent than pyrrolidone iodine

Adding water to 100%

The medicinal cloth is: 25-55g/m of degreased cotton cloth³Or 25-50g/m of adhesive non-woven fabric³Or chitosan non-woven fabric 25-50g/m³Or 25-50g/m of alginate fiber non-woven fabric³

2) The drug-loaded solvent is: PEG 40012%

The polyethylene is 10 percent than the pyrrolidone iodine

PEG4000 15％

Adding water to 100%

The medicinal cloth is: 55-120g/m of viscose fiber non-woven fabric³Or 50-120g/m of degreased cotton cloth³Or chitosan non-woven fabric 50-120g/m³Or seaweed non-woven fabric 50-120g/m³3) The drug-loaded solvent is: poloxamer 18830%

The polyethylene is 10 percent than the pyrrolidone iodine

20 percent of ethanol

Adding water to 100%

The medicinal cloth is: 55-120g/m of viscose fiber non-woven fabric³Or 50-120g/m of degreased cotton cloth³Or chitosan non-woven fabric 50-120g/m³Or seaweed non-woven fabric 50-120g/m³4) The drug-loaded solvent is: poloxamer 40715%

Amino acid iodine 10%

Polyvinyl pyrrolidone 5%

Adding water to 100%

The medicinal cloth is: viscose non-woven fabric50-120g/m³Or 50-120g/m of degreased cotton cloth³Or chitosan non-woven fabric 50-120g/m³Or seaweed non-woven fabric 50-120g/m³

5) The drug-loaded solvent is: glycerol 7%

5 percent of amino acid iodine

Polyvinyl alcohol 5%

Adding water to 100%

The medicinal cloth is: viscose fiber non-woven fabric 25-55g/m³Or silk fiber non-woven fabric 25-55g/m³Or chitosan non-woven fabric 25-50g/m³Or 25-50g/m of alginate fiber non-woven fabric³

6) The drug-loaded solvent is: poloxamer 18815%

Polyethylene glycol iodine 8%

Polyvinyl pyrrolidone 5%

0.1 percent of potassium iodide

Adding water to 100%

The medicinal cloth is: 45-100g/m silk non-woven fabric³Or 50-120g/m of alginate fiber non-woven fabric³

7) The drug-loaded solvent is: 5-10% of propylene glycol

5-10% of polyvinyl alcohol iodine

PEG3000-4000 10-20％

0.1 percent of potassium iodide

Adding water to 100%

The medicinal cloth is: 25-100g/m viscose non-woven fabric³Or chitosan non-woven fabric 25-100g/m³Or bamboo fiber non-woven fabric 25-100g/m³

8) The drug-loaded solvent is: 10 percent of propylene glycol

Polyethylene glycol iodine 10%

Polyvinyl pyrrolidone 5%

Poloxamer 40720%

30 percent of ethanol

Adding water to 100%

The medicinal cloth is: 50-100g/m of terylene and viscose (mixed in a ratio of 2-5: 8-5) fiber non-woven fabric³Or 50-120g/m of alginate fiber non-woven fabric³

9) The drug-loaded solvent is: 10 percent of propylene glycol

Polyvinyl alcohol iodine 10%

Polyvinyl pyrrolidone 5%

PEG4000 15％

Adding water to 100%

The medicinal cloth is: 50-120g/m viscose and terylene (mixed in a ratio of 8-5: 2-5) fiber non-woven fabric³Or 50-120g/m of alginate fiber non-woven fabric³

10) The drug-loaded solvent is: 10 percent of propylene glycol

Polyether alcohol iodine 10%

0.2 percent of potassium iodate

Polyvinyl pyrrolidone 5%

Poloxamer 40715%

Adding water to 100%

The medicinal cloth is: viscose non-woven fabric 45-120g/m³Or seaweed non-woven fabric 50-120g/m³Or chitosan non-woven fabric 45-100g/m³

11) The drug-loaded solvent is: 10 percent of propylene glycol

Double-chain quaternary ammonium salt iodine 10%

Polyvinyl pyrrolidone 5%

PEG 3000/4000 20％

Sodium iodide 0.5%

Adding water to 100%

The medicinal cloth is: viscose non-woven fabric 45-100g/m³Or chitosan non-woven fabric 45-100g/m³

12) The drug-loaded solvent is: tween 805%

The polyethylene is 5 percent than pyrrolidone iodine

10 percent of isopropanol

Adding water to 100%

The medicinal cloth is: 25-60g/m of degreased cotton cloth³Or viscose non-woven fabric 25-55g/m³

13) The drug-loaded solvent is: 808 percent of span

Methionine iodine 10%

Cellulose ester 3%

Poloxamer 18820%

Sodium iodide 0.5%

20 percent of ethanol

Adding water to 100%

The medicinal cloth is: viscose non-woven fabric 45-120g/m³Or seaweed non-woven fabric 50-120g/m³。

6. The antibacterial and antiviral medical cloth according to claim 1, wherein the drug-loaded vehicle system is attached to the drug-loaded cloth by spraying, dipping or soaking.

7. The antibacterial and antiviral medical cloth as claimed in claim 1, wherein the volatile solvent is removed by high temperature drying, natural airing, or blow drying with ventilation air.

8. The method for preparing the antibacterial and antiviral medical cloth as claimed in claim 1, which is characterized by comprising the following steps:

the whole process is carried out in a dark place, and a medicine-carrying solvent system is as follows: taking prescribed amount of povidone iodine or polyvinyl alcohol iodine, adding prescribed amount of softening agent (one of glycerol, PEG, poloxamer, propylene glycol, tween or span), adding volatilizable solvent which is 90% of the prescribed amount, adjusting pH value to 3-6.5, mixing uniformly and dissolving completely, adding volatilizable solvent to constant volume to the prescribed amount, and the preparation process is as follows: pouring the prepared liquid medicine into a soaking tank (or a spray gun), putting absorbent cotton cloth or non-woven cloth (perforated or embossed) on a machine, sequentially soaking (spraying), removing stains (selecting), drying or airing,

alternatively, the first and second electrodes may be,

the whole process is carried out in a dark place, and a medicine-carrying solvent system is as follows: taking double-chain quaternary ammonium salt iodine, methionine iodine or polyether alcohol iodine and the like according to the prescription amount, adding a softening agent (one of glycerol, PEG, poloxamer, propylene glycol, Tween or span) according to the prescription amount, a stabilizing agent according to the prescription amount, an adhesive according to the prescription amount, a volatile solvent according to the prescription amount, adjusting the pH value to 3-6.5, dissolving and uniformly mixing, adding the volatile solvent to the prescription amount, and fixing the volume, wherein the preparation process comprises the following steps: pouring the prepared liquid medicine into a soaking tank (or placing the liquid medicine into a spray gun), putting a degreased cotton cloth or non-woven cloth (which is perforated or embossed) on a machine, sequentially soaking (spraying), removing stains (selecting), and drying or airing.

9. The use of the antibacterial and antiviral medical cloth according to claim 1 in the preparation of antibacterial and antiviral products.

10. Use according to claim 9, characterized in that the antibacterial, antiviral product comprises: mask, medical protective clothing, band-aid, and protective layer for clinical open wound.

Technical Field

The invention relates to the research in the field of medical materials, in particular to a formula, a preparation method and application of breathable hydrophilic antibacterial antiviral medical cloth loaded with an iodine compound.

Background

Thousands of times, in the clinical needs of surgery, epidemic situation and traditional Chinese medicine, the screening and research of cloth with special function or drug effect has never been stopped, and the circulation of hot-spot vocabulary such as air permeability, antibiosis, antivirus, anti-adhesion, secretion absorption, even implantable degradation, etc. is repeatedly pursued and expanded. In recent years, medical cloth with special functions is more detailed, but the characteristics are more prominent, the forward research is rapidly progressed, but the defects are more, so that few and few projects capable of being produced in a large scale are provided.

In the aspect of development of medical cloth with special functions, currently, a few industrialized projects are introduced, Shenzhen Anxin nanometer biotechnology limited company discloses a nanometer silver antibacterial moisturizing medical dressing and a preparation method thereof in a patent of a high-imbibition nanometer silver antibacterial moisturizing medical dressing and a preparation method thereof (application number 201811033152.6), the nanometer silver antibacterial moisturizing medical dressing and the preparation method thereof are industrialized, the nanometer silver antibacterial moisturizing medical dressing is successfully applied to medical products such as wound patches, burn and scald patches, disinfection gel and the like, and a unique mask with antibacterial and antiviral functions is developed at present, and a patent of haze-prevention antibacterial mask with a breathing one-way valve (application number 201720265139.8) is applied in the current; a haze-proof humidifying antibacterial protective mask (application No. 201720265141.5). In addition, the research on the special materials of copper, zinc and titanium carried cloth at home and abroad is also vigorously developed.

The antibacterial and antiviral medical cloth in the scientific research stage is more reported, for example, the silver-loaded sodium alginate/polyvinyl alcohol composite nanofiber film dressing prepared in heavy sea, heavy sea and the like has good mechanical property, and can keep integrity after absorbing body fluid, so that the dressing can be completely taken out after absorbing wound exudate in the clinical use process, the wound is prevented from being polluted, meanwhile, the antibacterial rate of the dressing to escherichia coli is tested to be 99.98%, the antibacterial effect of silver-containing alginate commonly used in the market is achieved, and the cytotoxicity is slight; secondly, the polyacrylonitrile nanometer fiber membrane (cloth) is prepared by using an electrostatic spinning technology, such as Xiaolonghui, and the like, wherein the fibers are continuous and uniformly distributed, and the diameter distribution is in a range of 80-600 nm; the air permeability of the nanofiber membrane is reduced along with the increase of the membrane thickness, and the moisture permeability is good, so that the nanofiber membrane can provide a material for future high-end air-permeable medical instruments; the medicine-carrying composite nanofiber membrane is prepared by taking polyvinylidene fluoride as a raw material, doping enrofloxacin hydrochloride with the same mass fraction, adopting an electrostatic spinning technology, and is stable in average diameter (753 +/-128) nm, long in duration and excellent in antibacterial performance, and suitable for being used as wound dressing.

The reported research is numerous, but the characteristics are prominent: firstly, the cost is high, and is not beneficial to industrialization and mass consumption, after all, the medical dressing is a clinical basic consumable, and secondly, the probability of clinical safety research is low, especially, the new material is adopted, and further, the number of original products is small.

On the basis, the applicant searches and finds that the commonly used iodine medicaments have obvious sterilization effect, the basic mechanism is that free iodine can rapidly penetrate cell walls, and is combined with hydroxyl, amino, alkyl and sulfydryl on a protein amino acid chain to cause protein denaturation and precipitation and halogenation, so that the protein loses bioactivity, and clinically common dosage forms comprise iodine tincture (the content of common effective iodine is 20g/L), iodoglycerol (the common concentration is 10-30 g/L), iodoform powder, compound preparations and the like.

In the field of other microorganisms, iodine complexes are also reported, and William J.B and Patrick M and the like use povidone iodine with 3 different concentrations (5%, 1% and 0.1%) to perform an in vitro killing test for 4 strains of Neisseria gonorrhoeae (clinically isolated Chlamydia trachomatis) and 1 strain of herpes simplex type II virus for 1 minute, and the results show that three challenge inocula of Neisseria gonorrhoeae and herpes simplex type II virus are completely sterilized by three solutions. At concentrations of 5% and 1% povidone-iodine, chlamydia titre was reduced by 2 log units, whereas at 0.1% concentration, there was no significant reduction in chlamydia titre; in 1997, Kawana R and Kitamura T, et al found that PVP-I was effective against all viruses (adenovirus, mumps, polio (types 1 and 3), Coxsackie virus, herpes simplex, rubella, measles, influenza and human immunodeficiency virus) and was totally inactivated in a short time; in vitro experiments of Avinash S.B and Jesse S P and the like show that 0.5%, 1% and 1.5% of PVP-I oral spray can completely inactivate SARS-CoV-2 within 15 seconds, while a 70% ethanol control group can completely inactivate SARS-CoV-2 within 30 seconds, and during a COVID-19 pandemic period, the PVP-I spray can be used as a wound surface protective solution after dental and surgical operations; furthermore, Dontas L and Sabracos S et al found that povidone-iodine (PVP-I) has an anti-H5N 1 influenza virus effect when used in vitro.

Currently, the research on iodine is rapidly progressing, mainly involving complexes of iodine species (mostly in the form of iodine complexes, in this application the emphasis is on iodine complexes), which can be broadly divided into three categories: nonionic surfactant: polyvinylpyrrolidone (povidone, PVP), nonylphenol polyoxyethylene ether (POP), alkylphenol polyoxyethylene fatty alcohol ether (polyolethioide, NP-I), polyethylene glycol (PEG), polyvinyl alcohol (PVA), and the like, which are called iodophors complexed by taking a nonionic surfactant as a carrier, are respectively abbreviated as: PVP-I, POP-I, NP-I, PEG-I, PVA-I, etc.; secondly, cationic surface active iodine, such as hexadecyl dimethyl benzylamine iodine, has stable iodophor property but is less used; ③ anionic surface active iodine, such as alkyl sulfonate complex iodine. Such stability is poor, but the detergency is good. In contrast, most iodophor preparations, the carrier of which is usually a nonionic surfactant, have stable properties and are most commonly used, and most of the iodophor products on the market belong to the nonionic surfactant type.

In the aspects of process and formulation, iodine preparations are more, the common preparations comprise solution preparations, sprays, aerosols, ointments, iodoglycerol, iodine tincture and the like, relatively speaking, in the aspect of coating process research, in 2001, Sun Yufeng, Yangwitai and the like find that a non-hygroscopic polypropylene non-woven fabric is adopted as a base, transparent biaxially oriented polypropylene (BOPP) with N-vinyl pyrrolidone (NVP) is grafted on the surface of the non-hygroscopic polypropylene non-woven fabric, and a complexing technology is adopted after film forming to prepare an iodine complexing material which has obvious killing and inhibiting effects on bacillus and candida albicans; the research progress of the iodine-modified antibacterial composite material is summarized by Panqian, Lihuizi and the like, and the research methods of the antibacterial polymer composite material based on povidone iodine (PVP-I) modification, such as graft copolymerization, hydrophobic nano granulation, nano fibrosis prepared as an auxiliary material, embedding doping and the like, are found. Meanwhile, the application prospect of the antibacterial polymer composite material modified based on PVP-I in the fields of medical sanitation, packaging materials, coatings and the like is correspondingly introduced.

The applicant notices that no research and report exists at present on the aspects of the preparation, preparation method and application of the air-permeable hydrophilic non-woven fabric drug-loaded medical cloth.

Disclosure of Invention

The invention aims to provide hydrophilic antibacterial antiviral medical cloth containing an iodine compound, and specifically comprises a formula, a preparation process and application.

The invention relates to an antibacterial and antiviral medical cloth, which comprises the following components:

the medicine-carrying solvent system and the medicine-carrying cloth have the advantages that after the medicine-carrying solvent system is adhered to the cloth and the volatile solvent is removed, the medicine and other auxiliary materials are uniformly adhered to the cloth, the cloth has air permeability, and the medical cloth has water absorbability.

The invention relates to a hydrophilic antibacterial antiviral medical cloth containing an iodine compound, which consists of a medicine-carrying solvent system and a medicine-carrying cloth, wherein the medicine-carrying solvent system comprises: iodine compound and drug-carrying auxiliary materials:

wherein the iodine complex comprises: amino acid (mainly methionine, etc.) iodine, polyvinylpyrrolidone iodine, polyvinyl alcohol iodine, polyethylene glycol iodine, polyalcohol ether iodine, and double-chain quaternary ammonium salt iodine, which can be one of them, or a mixture of two or more of them;

wherein, the medicine carrying auxiliary material comprises: volatile solvents, adhesives, stabilizers, and softeners;

wherein, cloth for medicine carrying includes: absorbent cotton cloth or hydrophilic non-woven fabric, wherein the cotton cloth is made of natural cotton fiber after being degreased, and the hydrophilic non-woven fabric is made of plant fiber, animal fiber or artificial fiber;

wherein, the medicine-carrying solvent system consists of the following components:

the dosage of the iodine complex accounts for 0.1-15% of the volume of the drug-carrying solvent system, preferably 1-10%, and most preferably 3-8%;

the dosage of the adhesive is not more than 10% of the volume of the drug-loaded solvent system;

the dosage of the stabilizer is not more than 1% of the volume of the drug-carrying solvent system;

the dosage of the softening agent is not more than 35% of the volume of the drug-loaded solvent system;

the balance being volatile solvent.

The above percentages are weight/volume ratios.

Wherein, in the drug-loaded solvent system:

the volatilizable solvents include: ethanol, water and isopropanol, wherein the ethanol, water and isopropanol can be one or a mixture of two or more of the ethanol, water and isopropanol;

the adhesive comprises: polyvinyl pyrrolidone, polyvinyl alcohol, vinyl acetate, polyether, polyamide, polyacrylate, a-cyanoacrylate, polyvinyl acetal, and ethylene-vinyl acetate copolymer, which may be one kind of them, or a mixture of two or more kinds of them;

a stabilizer: mainly inorganic iodides, including: potassium iodide, sodium iodide and potassium iodate, which can be one of them, or a mixture of two or more of them;

the softening agent comprises: propylene glycol, polyethylene glycol (PEG) series (molecular weight 200-;

wherein the poloxamer series comprises: f68, F87, F103, F108, F127, F128, etc., we studied as typified by 68 and 127;

the tween series comprises: t-20, T-60, T-80 and the like, wherein T-80 is taken as a representative for research;

the span series includes: s-20, S-40, S-60, S-80, S-85 and the like, wherein S-80 is taken as a representative for research;

the cloth for carrying medicine comprises: the non-woven fabric comprises one or two or more of gauze, absorbent cotton cloth, polyester fiber, alginate fiber, bamboo fiber, chitosan fiber, viscose (viscose, sticky) fiber or silk fiber in different proportions.

Wherein the size of the absorbent cotton cloth is 25-120g/m³The specification of the non-woven fabric is 25-120g/m³。

Wherein, preferred be degrease cotton, dacron fibre, viscose (gluing) fibre or silk fibre, the non-woven fabrics can constitute according to certain proportion by dacron fibre, viscose (gluing, viscose) fibre or silk fibre, also can be wherein single component.

Wherein, the cloth for medicine carrying can adopt an embossing mode or a needle roller punching mode in the air permeability, the specification is 10-40 meshes, and the needle roller punching can be carried out before medicine carrying and can also be carried out after the medicine carrying.

Wherein, after the medicine carrying auxiliary materials are coated on the cloth, the volatile solvent is removed in different modes.

Wherein, the medicine-carrying solvent system is attached on the cloth for carrying medicine by double-layer/single-layer spraying, dipping (pressing) or soaking (pressing).

Wherein the volatile solvent is removed by pressing, (high temperature instant) drying, or naturally drying, or drying with ventilation air.

Specifically, the formula of the breathable antibacterial and antiviral medical cloth loaded with the iodine compound, which is disclosed by the invention, can be implemented through specific test tests as follows:

1) the drug-loaded solvent is: PEG 200-4005-8%

The polyethylene is 5 percent than pyrrolidone iodine

Adding water to 100%

The medicine carrying cloth is as follows: 25-55g/m of degreased cotton cloth³Or viscose non-woven fabric 25-60g/m³Or chitosan non-woven fabric 25-50g/m³Or 25-50g/m of alginate fiber non-woven fabric³

Optimized proportioning

The drug-loaded solvent is: PEG 3005%

The polyethylene is 5 percent than pyrrolidone iodine

Adding water to 100%

The medicine carrying cloth is as follows: 25-55g/m of degreased cotton cloth³Or viscose non-woven fabric 25-50g/m³Or chitosan non-woven fabric 25-50g/m³Or 25-50g/m of alginate fiber non-woven fabric³

2) The drug-loaded solvent is: PEG 200-40010-15%

The polyethylene is 10 percent than the pyrrolidone iodine

PEG4000 10-15％

Adding water to 100%

The medicine carrying cloth is as follows: viscose non-woven fabric 55-120g/m³Or 50-120g/m of degreased cotton cloth³Or chitosan non-woven fabric 50-120g/m³Or seaweed non-woven fabric 50-120g/m³

Optimized proportioning

The drug-loaded solvent is: PEG 40012%

The polyethylene is 10 percent than the pyrrolidone iodine

PEG4000 15％

Adding water to 100%

The medicine carrying cloth is as follows: viscose non-woven fabric 55-120g/m³Or 50-120g/m of degreased cotton cloth³Or chitosan non-woven fabric 50-120g/m³Or seaweed non-woven fabric 50-120g/m³

3) The drug-loaded solvent is: poloxamer 18810-30%

The polyethylene is 10 percent than the pyrrolidone iodine

0 to 20 percent of ethanol

Adding water to 100%

The medicine carrying cloth is as follows: viscose non-woven fabric 55-120g/m³Or 50-120g/m of degreased cotton cloth³Or chitosan non-woven fabric 50-120g/m³Or seaweed non-woven fabric 50-120g/m³

Optimized proportioning

The drug-loaded solvent is: poloxamer 18830%

The polyethylene is 10 percent than the pyrrolidone iodine

20 percent of ethanol

Adding water to 100%

The medicine carrying cloth is as follows: viscose non-woven fabric 55-120g/m³Or 50-120g/m of degreased cotton cloth³Or chitosan non-woven fabric 50-120g/m³Or seaweed non-woven fabric 50-120g/m³

4) The drug-loaded solvent is: poloxamer 40710-15%

Amino acid iodine 10%

Polyvinyl pyrrolidone 5%

Adding water to 100%

The medicine carrying cloth is as follows: 45-120g/m viscose non-woven fabric³Or 45-120g/m of degreased cotton cloth³Or chitosan non-woven fabric 50-120g/m³Or seaweed non-woven fabric 50-120g/m³

Optimized proportioning

The drug-loaded solvent is: poloxamer 40715%

Amino acid iodine 10%

Polyvinyl pyrrolidone 5%

Adding water to 100%

The medicine carrying cloth is as follows: 50-120g/m viscose non-woven fabric³Or 50-120g/m of degreased cotton cloth³Or chitosan non-woven fabric 50-120g/m³Or seaweed non-woven fabric 50-120g/m³

5) The drug-loaded solvent is: 5 to 7 percent of glycerol

3 to 5 percent of amino acid iodine

3 to 5 percent of polyvinyl alcohol

Adding water to 100%

The medicine carrying cloth is as follows: 25-55g/m of viscose non-woven fabric³Or silk non-woven fabric 25-55g/m³Or chitosan non-woven fabric 25-50g/m³Or 25-50g/m of alginate fiber non-woven fabric³

Optimized proportioning

The drug-loaded solvent is: glycerol 7%

5 percent of amino acid iodine

Polyvinyl alcohol 5%

Adding water to 100%

The medicine carrying cloth is as follows: 25-55g/m of viscose non-woven fabric³Or silk non-woven fabric 25-55g/m³Or chitosan non-woven fabric 25-50g/m³Or 25-50g/m of alginate fiber non-woven fabric³

6) The drug-loaded solvent is: poloxamer 1885-15%

3 to 8 percent of polyethylene glycol iodine

3 to 5 percent of polyvinyl pyrrolidone

0.1 percent of potassium iodide

Adding water to 100%

The medicine carrying cloth is as follows: silk non-woven fabric 25-100g/m³Or 25-120g/m of alginate fiber non-woven fabric³

Optimized proportioning

The drug-loaded solvent is: poloxamer 18815%

Polyethylene glycol iodine 8%

Polyvinyl pyrrolidone 5%

0.1 percent of potassium iodide

Adding water to 100%

The medicine carrying cloth is as follows: 45-100g/m silk non-woven fabric³Or 50-120g/m of alginate fiber non-woven fabric³

7) The drug-loaded solvent is: 5-10% of propylene glycol

5-10% of polyvinyl alcohol iodine

0.1 percent of potassium iodide

PEG3000-4000 10-20％

Adding water to 100%

The medicine carrying cloth is as follows: 25-100g/m viscose non-woven fabric³Or chitosan non-woven fabric 25-100g/m³Or bamboo fiber non-woven fabric 25-100g/m³

Optimized proportioning

The drug-loaded solvent is: 10 percent of propylene glycol

Polyvinyl alcohol iodine 10%

0.1 percent of potassium iodide

PEG3000-4000 20％

Adding water to 100%

The medicine carrying cloth is as follows: viscose non-woven fabric 45-100g/m³Or chitosan non-woven fabric 45-100g/m³Or bamboo fiber non-woven fabric 45-100g/m³

8) The drug-loaded solvent is: 5-10% of propylene glycol

8-10% of polyethylene glycol iodine

Polyvinyl pyrrolidone 5%

40710-20% of poloxamer

0 to 60 percent of ethanol

Adding water to 100%

The medicine carrying cloth is as follows: 50-120g/m of terylene and viscose (mixed in proportion of 2-5: 8-5) non-woven fabric³

Or 50-120g/m of alginate fiber non-woven fabric³

Optimized proportioning

The drug-loaded solvent is: 10 percent of propylene glycol

Polyethylene glycol iodine 10%

Polyvinyl pyrrolidone 5%

Poloxamer 40720%

30 percent of ethanol

Adding water to 100%

The medicine carrying cloth is as follows: 50-100g/m of terylene and viscose (mixed in proportion of 2-5: 8-5) non-woven fabric³Or 50-120g/m of alginate fiber non-woven fabric³

9) The drug-loaded solvent is: 5-10% of propylene glycol

6-10% of polyvinyl alcohol iodine

2 to 5 percent of polyvinyl pyrrolidone

PEG4000 10-15％

Adding water to 100%

The medicine carrying cloth is as follows: 50-120g/m of viscose and terylene (mixed in proportion of 8-5: 2-5) non-woven fabric³Or 50-120g/m of alginate fiber non-woven fabric³

Optimized proportioning

The drug-loaded solvent is: 10 percent of propylene glycol

Polyvinyl alcohol iodine 10%

Polyvinyl pyrrolidone 5%

PEG4000 15％

Adding water to 100%

The medicine carrying cloth is as follows: 50-120g/m of viscose and terylene (mixed in proportion of 8-5: 2-5) non-woven fabric³Or 50-120g/m of alginate fiber non-woven fabric³

10) The drug-loaded solvent is: 5-10% of propylene glycol

5 to 10 percent of polyether alcohol iodine

0.2 percent of potassium iodate

2 to 5 percent of polyvinyl pyrrolidone

Poloxamer 40710-15%

1 to 3 percent of gelatin

Adding water to 100%

The medicine carrying cloth is as follows: 25-120g/m of viscose non-woven fabric³Or seaweed non-woven fabric 25-120g/m³Or

Chitosan non-woven fabric 25-100g/m³

Optimized proportioning

The drug-loaded solvent is: 10 percent of propylene glycol

Polyether alcohol iodine 10%

0.2 percent of potassium iodate

Polyvinyl pyrrolidone 5%

Poloxamer 40715%

1.5 percent of gelatin

Adding water to 100%

The medicine carrying cloth is as follows: viscose non-woven fabric 45-120g/m³Or seaweed non-woven fabric 50-120g/m³Or chitosan non-woven fabric 45-100g/m³

11) The drug-loaded solvent is: 5-10% of propylene glycol

Double-chain quaternary ammonium salt iodine 5-10%

2 to 5 percent of polyvinyl pyrrolidone

PEG3000-4000 10-20％

1 to 3 percent of gelatin

Sodium iodide 0.5%

Adding water to 100%

The medicine carrying cloth is as follows: 25-120g/m of viscose non-woven fabric³Or chitosan non-woven fabric 25-100g/m³

Optimized proportioning

The drug-loaded solvent is: 10 percent of propylene glycol

Double-chain quaternary ammonium salt iodine 10%

Polyvinyl pyrrolidone 5%

PEG3000-4000 20％

Gelatin 2%

Sodium iodide 0.5%

Adding water to 100%

The medicine carrying cloth is as follows: viscose non-woven fabric 45-100g/m³Or chitosan non-woven fabric 45-100g/m³

12) The drug-loaded solvent is: tween 802-5%

Polyvinyl pyrrolidone iodine 5-10%

5 to 10 percent of isopropanol

Adding water to 100%

The medicine carrying cloth is as follows: 25-120g/m of degreased cotton cloth³Or viscose non-woven fabric 25-120g/m³

Optimized proportioning

The drug-loaded solvent is: tween 805%

The polyethylene is 5 percent than pyrrolidone iodine

10 percent of isopropanol

Adding water to 100%

The medicine carrying cloth is as follows: 25-60g/m of degreased cotton cloth³Or viscose non-woven fabric 25-55g/m³

13) The drug-loaded solvent is: span 802-8%

3-10% of methionine iodine

Cellulose ester 2-3%

Sodium iodide 0.1-0.5%

Poloxamer 18810-20%

20 to 50 percent of ethanol

Adding water to 100%

The medicine carrying cloth is as follows: 25-120g/m of viscose non-woven fabric³Or seaweed non-woven fabric 25-120g/m³。

Optimized proportioning

The drug-loaded solvent is: 808 percent of span

Methionine iodine 10%

Cellulose ester 3%

Sodium iodide 0.5%

Poloxamer 18820%

20 percent of ethanol

Adding water to 100%

The medicine carrying cloth is as follows: viscose non-woven fabric 45-120g/m³Or seaweed non-woven fabric 50-120g/m³。

The invention also aims to provide a preparation method of the antibacterial and antiviral medical cloth.

The preparation method of the air-permeable antibacterial antiviral medical cloth loaded with the iodine compound comprises the following steps:

1) and (3) whole-process light-shielding operation:

drug-loaded solvent system: taking prescribed amount of povidone iodine or polyvinyl alcohol iodine, adding prescribed amount of softening agent (one or mixture of glycerol, PEG, poloxamer, propylene glycol, tween or span), prescribed amount of stabilizing agent, adding volatile solvent of 90% of prescribed amount, adjusting pH value to 3-6.5, mixing and dissolving completely, adding volatile solvent to constant volume to prescribed amount.

The preparation process comprises the following steps: pouring the prepared liquid medicine into a soaking tank (or placing the liquid medicine into a spray gun), putting the degreased cotton cloth or non-woven fabric on the machine, sequentially soaking (spraying), removing stains (selecting), drying or airing, perforating the non-porous cloth by using a needle roller, and putting the cloth into a light-resistant bag for storage after the cloth is collected.

It can also be:

2) and (3) whole-process light-shielding operation:

drug-loaded solvent system: taking methionine iodine, double-chain quaternary ammonium salt iodine or polyether alcohol iodine according to the prescription amount, adding a softening agent (one or a mixture of glycerol, PEG, poloxamer, propylene glycol, Tween or span) according to the prescription amount, a stabilizing agent according to the prescription amount, an adhesive according to the prescription amount, adding a volatile solvent according to the prescription amount, adjusting the pH value to 3-6.5, dissolving and uniformly mixing, and adding the volatile solvent to fix the volume to the prescription amount.

The preparation process comprises the following steps: pouring the prepared liquid medicine into a soaking tank (or placing the liquid medicine into a spray gun), putting the degreased cotton cloth or non-woven fabric on the machine, sequentially soaking (spraying), removing stains (selecting), drying or airing, perforating the non-porous cloth by using a needle roller, and putting the cloth into a light-resistant bag for storage after the cloth is collected.

The invention also aims to provide the application of the antibacterial and antiviral medical cloth in the preparation of antibacterial and antiviral products.

Wherein, the antibacterial and antiviral product comprises: mask, medical protective clothing, band-aid, and clinical protective film for open wound.

The application of the air-permeable antibacterial antiviral medical cloth loaded with the iodine compound is as follows:

the method comprises the following steps:

1) the antibacterial and antiviral mask can be applied to a mask and is used as an antibacterial layer or an antiviral layer, and the antibacterial and antiviral mask is placed between an outer layer of non-woven fabric and a melt-blown layer in the preparation process of the mask, wherein the non-woven fabric can be made of water-absorbing materials and non-water-absorbing materials;

2) can be applied to a mask, and can be directly sewn or made into a replaceable patch for use;

3) the air-permeable mouth isolation layer can be applied to medical protective clothing, can play the role of antibiosis and antivirus as the air-permeable mouth isolation layer, and can solve the problem that the protective clothing is too stuffy;

4) the antibacterial and antiviral patch can be applied to clinical open wounds, can be used as a protective film to play a role in resisting bacteria and viruses, and can be used as an aseptic protective patch in a specific form and can also be used as wound patches in different shapes.

Characteristic of the invention

1. Organic iodine is used as a main raw material, so that the sublimation of free iodine or inorganic iodine caused by heat is avoided, the stability problem of iodine is solved, and the antibacterial and antiviral effects of the iodine compound are exerted;

2. the medicine carrying mode of the medical cloth mainly takes adhesion as a main mode, avoids the 'noble' and 'complex' of an electrostatic spinning technology, and is easier to industrialize;

3. the air permeability of the medical cloth adopts a micropore design;

4. the medical cloth can absorb moisture, is reasonable to play the iodine drug effect, avoids the water insulation and the air insulation of the existing operation iodine membrane, and is more beneficial to the skin breathing;

5. the selection of the softening agent solves the problem of hardening after the medical cloth is bonded, and the coating of the iodine compound is more firmly coated on the fiber, so that particles such as crystalline substances and the like are prevented from being formed in the fiber space and are easy to fall off in air flow;

6. the medical cloth can be applied in a multi-layer overlapping way, so that the blocking and killing capacity to bacteria and viruses is enhanced.

Drawings

FIG. 1 is a non-woven layout of viscose fibers loaded with povidone-iodine, as generally seen in FIG. 1A and under the mirror of FIG. 1B

FIG. 2 is a layout of absorbent cotton loaded with povidone-iodine, as generally seen in FIG. 2A and as viewed under the mirror in FIG. 2B

FIG. 3 is a layout of a viscose nonwoven fabric loaded with iodine amino acid, as viewed from the perspective of FIG. 3A, and as viewed from the perspective of FIG. 3B under the mirror

FIG. 4 shows the bacteriostatic ring of the viscose non-woven fabric loaded with iodine complex against Candida albicans

FIG. 5 shows the bacteriostatic ring of the viscose non-woven fabric loaded with iodine complex against Staphylococcus aureus

FIG. 6 shows the bacteriostatic ring of the viscose fiber non-woven fabric loaded with iodine compound on pseudomonas aeruginosa

FIG. 7 bar graph of iodine solution for RD cytotoxicity test

FIG. 8 bar graph of iodine versus Huh7 cytotoxicity test

FIG. 9 bar graph of antiviral effect of iodine solutions at different concentrations on EV71

FIG. 10 bar graph of antiviral effect of iodine solutions of different concentrations on Echo

FIG. 11 is a bar graph of the antiviral effect of iodine solutions of different concentrations on the new coronavirus

FIG. 12 is a bar graph of the antiviral effect of iodine-containing non-woven fabric leachate on EV71

FIG. 13 is a bar graph showing the antiviral effect of iodine-containing non-woven fabric leachate on Echo

FIG. 14 is a bar graph showing the antiviral effect of iodine-containing non-woven fabric leachate on new coronavirus

Detailed Description

The present invention is further illustrated in detail by the following specific examples, which are not intended to limit the invention thereto.

Materials for experiments

Main medical cloth

Hot-blast cotton 60g/m³Dongguan Shatian Xianghao non-woven fabric factory;

non-woven fabrics (viscose) 25-120g/m³(22, 40 meshes) Zhejiang hong develops a novel non-woven material;

superfine non-woven fabric (viscose) 45-85g/m³A new nonwoven material is developed by hong Jiang Zhejiang;

25-120g/m plain non-woven fabric (viscose)³A new nonwoven material is developed by hong Jiang Zhejiang;

25-120g/m of spunlace non-woven fabric (viscose)³(ii) a Huahao non-woven;

50-120g/m of full-polyester spunlace non-woven fabric (polyester viscose)³A new material Zhejiang Huahao;

25-120g/m of spunlace non-woven fabric (polyester viscose)³A new material Zhejiang Huahao;

25-120g/m of spunlace non-woven fabric (terylene)³Zhejiang province is good in material and non-woven fabric;

25-120g/m of absorbent cotton cloth (10, 21, 40 pieces)³Liuzhou Xinhui sanitary material;

25-120g/m of spunlace non-woven fabric (chitosan)³A biological medical material of Qingdao and Mingyue;

25-120g/m of spunlace nonwoven fabric (seaweed)³A biological medical material for Qingdao and Mingyue.

Major drugs and reagents

Polyvinyl pyrrolidone iodine (povidone iodine, with 10% iodine content, reddish brown powder) is used for preparing medicine from Cianli bang;

methionine iodine (iodine content 5-6%, yellow-brown powder) is available from Sanbao biochemistry technology in Huizhou city;

iodine PEG iodine (PEG300, yellow-brown liquid) Shenzhen charm technology;

double-chain quaternary ammonium salt iodine (50% + 5%, reddish brown viscous liquid) has been developed by Saibei science and technology in Hubei;

poly (alcohol ether iodine) (8%, brown viscous liquid) Yangzhou golden medical instrument;

potassium iodide, the south of the Ji century, leads to chemical engineering;

sodium iodide Hubeixin Rundg chemical engineering;

potassium iodate Shanghai Bang chemical industry;

polyethylene glycol 300, 200, 400, 1000, 3000, 4000 national medicine group chemical reagent;

propylene glycol, Tianjin Dalochi chemical reagent;

glycerol, Tianjin Fuchen chemical reagent;

poloxamer 68, 127 basf;

tween 80, span 80, a new material for Qingdao Jianjunfeng;

ethanol Tianjin Damao chemical reagent;

chemical reagent of isopropanol national medicine group;

purified water is used for preparing medicines.

Examples of the experiments

1. Effect of different vehicle systems on iodine Complex solubility

Taking a plurality of 10mL penicillin bottles, respectively weighing (selecting) 2g each of polyvinyl pyrrolidone iodine (povidone iodine), methionine iodine, iodine PEG iodine and double-chain quaternary ammonium salt iodine, wherein the bottles are respectively coded into four series A-X, B-X, C-X, D-X, respectively adding 10mL of solvents of different systems, observing solubility and viscosity and recording, then covering a bottle mouth with absorbent cotton cloth, standing overnight at about 60 ℃, and observing color change of the cotton cloth.

The result shows that the solubility of the povidone iodine and the methionine iodine in water is good, the iodine PEG iodine and the double-chain quaternary ammonium salt iodine can be uniformly mixed in ethanol and isopropanol, and the methionine iodine and the double-chain quaternary ammonium salt iodine cloth are yellowish at about 60 ℃, and the possibility of slight iodine volatilization is inferred.

Taking A-X as an example, the experimental grouping, formulation and observation results are as follows:

note: a-11 is a solid powder for comparison.

B-X is the same as A-X, so B-X is slightly tabulated;

C-X and D-X have the same phenomenon (C-X is lighter in color, and the rest are the same), so that the C-X table is slightly omitted;

taking D-X as an example, the experimental grouping, formulation and observation results are as follows:

note: d-11 is a solid powder for comparison

2. Investigating the dipping effect of different iodine compound solutions on different medical cloths

Several petri dishes were prepared, and the drug solution (5% iodine complex) was prepared as follows:

encoding	Formulation of
		A-1	Adding povidone iodine and water to 100%, and adjusting pH to 3-6.5
A-3	Adding 50% of povidone iodine, 50% of ethanol and 100% of water, and adjusting the pH to 3-6.5
		B-1	Methionine iodine, polyvinyl alcohol 5% and water to 100%, regulating pH3-5
B-3	Methionine iodine, ethanol 50% and water 100%, adjusting pH3-5
		C-1	Adding polyethylene glycol iodine and water to 100%, adjusting pH to 4-6
C-3	Adding polyethylene glycol iodine, ethanol 50% and water to 100%, adjusting pH4-6
		D-1	Adding quaternary ammonium salt iodine and water to 100%, and adjusting pH to 3-5
D-3	Adding 50% of ethanol and 100% of water into the mixture, and adjusting the pH to 3-5
		A-8	Adding 50% of povidone iodine and 50% of isopropanol into 100% of water, and adjusting the pH to 3-6.5
B-8	Methionine iodine, isopropanol 50% and water 100%, adjusting pH3-5

Taking medical cloth 5 x 10cm made of different materials, immersing for 1min, observing the immersion condition and recording, taking out, hanging and airing, and specifically comprising the following steps:

the results show that: the water absorption effect of the all-polyester spunlace non-woven fabrics (8 and 9) is poor, the water absorption effect is eliminated, the No. 7 water-absorbing fabric is slowly immersed, the rest non-woven fabrics and the hot air cotton can absorb water quickly, after the non-woven fabrics and the hot air cotton are hung up for about 30min, the non-woven fabrics stop dripping, the color distribution is uniform (micro edge effect), the hot air cotton still drips liquid medicine, the upper half part of the hot air cotton is light in color, and the lower half part of the hot air cotton is deep, so that the non-woven fabrics can be made of the related materials.

3. Research on preparation process of adhesive non-woven fabric and iodine process

With 100% viscose non-woven fabric (60 g/m)³) For example, the preparation effect of the iodine-attached process is examined, and the process is as follows: taking prescription dose of methionine iodine and iodine chloride, adding prescription solvent into polyvinyl alcohol for dissolving, after the non-woven fabric forming process, uniformly spraying, dividing into two parts, wherein one part is dried in the air, the other part is dried in an oven (70-100 ℃, 10-20min), measuring the iodine content (the sample amount is n ═ 3) by adopting a potentiometric titration method, and investigating the influence of the drying (drying ratio) in the preparation process on the loss rate of iodine, wherein the prescription and the result are as follows:

the results show that: the polyvinyl pyrrolidone iodine is used as a main drug, so that the loss is minimum in the preparation process, and the thermal stability is relatively stable, but the phenomenon that a plurality of dried samples are hard and even a part of the samples are broken after being folded is found.

4. Study on softening process of non-woven fabric or absorbent cotton cloth after drug loading

The formula of 5% of polyvinylpyrrolidone iodine and 100% of water is taken as an example for illustration, after the rest four different iodine raw materials are compared and researched, the problems are basically the same as the solutions, and the influence of different softeners on the performances of the raw materials is as follows: weighing polyvinylpyrrolidone in a prescription amount, adding a softening agent in the prescription amount, adding water to dilute to 100%, drying in an oven (70-100 ℃, 10-20min), and inspecting the softness of the cloth after carrying the medicine.

The results show that: propylene glycol, polyethylene glycol, poloxamer, tween and span can be used as the softening agent.

5. Different specifications (g/m)³) Study on viscose non-woven fabric as example and amount of iodine compound

Different kinds of medical cloth: the specifications of 100% embossed viscose non-woven fabric (22 meshes), plain non-woven fabric and absorbent cotton cloth (21 pieces) are as follows: 25. 45, 60, 80, 100, 120g/m³The drug-loading system concentration is 5% and 10% respectively as an example, and the specific formula is as follows:

1)PEG300 5％

the polyethylene is 5 percent than pyrrolidone iodine

Adding water to 100%

The medicine-carrying medical cloth is: absorbent cotton cloth or viscose non-woven cloth (specification as above)

2)PEG300 10-12％

The polyethylene is 10 percent than the pyrrolidone iodine

PEG4000 15％

0.1 percent of potassium iodide

Adding water to 100%

The medicine-carrying medical cloth is: viscose non-woven fabrics or absorbent cotton cloth (specification as above)

The basic preparation process comprises the following steps: soaking cloths of different specifications in the prepared liquid medicine, taking out after 0.5-1min, hanging up, emptying redundant liquid, drying in a ventilating oven at 60-70 ℃ (about 10-60min), cutting 100cm x 15 cm cloth, cutting into pieces, putting in a 100mL conical flask, adding 50mL of water (three times), rapidly performing ultrasonic treatment to separate out the medicine, and measuring the content (converted into a povidone iodine meter) by adopting a content measuring method (potentiometric titration) in povidone iodine solution quality standard in pharmacopoeia.

Determination result (mg) of content of polyvinylpyrrolidone iodine in embossed viscose (100%) medical cloth with different specifications

Determination result (mg) of content of iodine in polyvinyl pyrrolidone in plain weave (100%) medical cloth with different specifications

Measurement result (mg) of iodine content of polyvinylpyrrolidone in absorbent cotton cloth (21 pieces, medical cloth) of various specifications

The results show that: the medical cloth of the same material and specification adopts the drug loading of a 10 percent solution of polyethylene and pyrrolidone iodine which is 2 to 4.5 times of that of a 5 percent solution of polyethylene and pyrrolidone iodine after being soaked, and the drug loading of the medical cloth of the same material is increased in sequence along with the increase of the weight of a unit area, and the drug loading is 120g/m³The gauge cloth is about 25g/m³The drug loading is more than 3 times of the drug loading; in terms of different materials, the plain non-woven fabric has the largest drug loading amount which is about 5 to 10 percent higher than the drug loading amount of other two materials.

6. Research on ventilation performance of non-woven fabrics with different materials and specifications after drug loading

Under the technical regulation of the reference national standard GB/T32610 and 2016 daily protective mask, the air permeability detection method comprises the following steps: the method is carried out by referring to a schematic diagram of an air suction resistance detection device, under the precondition that the measuring range of a flowmeter is 0-100L/min, the precision is 3%, the measuring range of a micro-pressure meter is 0-1000 Pa, the precision is 1Pa, the air suction amount of an air suction pump is 100L/min, the air flow under the detection condition is constant to be 85 +/-1L/min, and the air tightness and the working state of the detection device are detected before the test.

Adjusting the ventilation volume to 85 +/-1L/min, setting the system resistance of the detection device to be 0, preparing a tested medicine-carrying cloth sample into a mask shape, wearing the mask on a medium-sized grinding tool head, adjusting the wearing or position of the mask and the tightness of a head band to ensure the tight fit of the mask and a test head die, adjusting the ventilation volume to 85 +/-1L/min, measuring and recording the inspiration resistance, and determining that the expiration resistance is smaller than 145Pa according to standard regulation, namely the mask is qualified.

The different test samples and results are shown in the table below

The results show that 22 and 40 mesh nonwovens (100% viscose), absorbent cotton (21, 40 and 60)10 mesh split ultra-fine nonwovens, 5 and 10 mesh ultra-fine nonwovens and 10 mesh spunlace nonwovens (seaweed, chitosan, viscose, dacron, micro-perforated 1/1.6mm) can all meet the requirements, and the remaining samples have a very high resistance, probably because the polyethylene has a certain adhesion and film-forming property compared to the pyrrolidone.

7. Research on preparation process of iodine compounds with different formulas

We classify and illustrate several iodine complexes as examples: polyvinyl alcohol iodine, povidone iodine, methionine iodine, iodine PEG iodine, double-chain quaternary ammonium salt iodine and polyether alcohol iodine are selected for explanation, wherein povidone in the povidone iodine is used as an adhesive, the polyvinyl alcohol iodine has a certain adhesion function by taking polyvinyl alcohol as the adhesive, and the rest polyvinyl alcohol iodine does not exist, so that the two processes are slightly different:

wherein, in the formula of the povidone iodine, an adhesive is not required to be added; in other formulas, a certain amount of adhesive is required to be added;

therefore, the basic flow in the process is as follows:

1) selecting cloth: when in use, the medicine carrying cloth does not exceed 50g/m³When the concentration of the liquid medicine for dipping is small, the concentration of the liquid medicine is recommended to be below 1-6 percent; in contrast, when the drug-loaded cloth is used, the drug-loaded cloth exceeds 50g/m³When the iodine powder is soaked in the high-concentration liquid medicine, the concentration of the soaked liquid medicine is recommended to be 6-10%, the cloth with high gram number can be soaked in the low-concentration liquid medicine, but the control of soaking and rolling needs to be well done in the process, the problem that the iodine powder floats on the cloth when the cloth with low gram number is soaked in the high-concentration liquid medicine and then dried in the air, and the cloth is sticky and cannot be used;

2) the preparation of the liquid medicine, when the povidone iodine is selected as the main drug, the stability is better, and a stabilizer is not required to be added, when methionine iodine, iodine-PEG-iodine, double-chain quaternary ammonium salt iodine and the like are adopted as the main drugs, the stabilizer can be added to increase the stability of the liquid medicine in the later operation process;

the formula comprises the following components: iodine complex, adhesive (optional), stabilizer (optional), softening agent and solvent;

3) the basic process flow of the process is as follows: after the liquid medicine is prepared, the non-woven fabric or the absorbent cotton cloth is immersed for 0.05-1min (even spraying is optional), a part of liquid medicine is slightly left to be removed (0.5-1h), the non-woven fabric or the absorbent cotton cloth is led into a rolling mill to remove part of liquid, and the non-woven fabric or the absorbent cotton cloth is treated by a drying machine to obtain the final medicine carrying cloth.

4) Some of the results are shown in the figure.

8. Study on antibacterial action of iodine complex with different formulations (concentrations)

The formula is as follows: mainly comprises 5 to 15 percent of PEG 300; respectively taking 3,5 and 7.5 percent of polyvinylpyrrolidone iodine, 50g of viscose non-woven fabric, adhesive and the like to prepare iodine-containing medicine-carrying cloth (the first batch of industrialization, single infiltration, secondary pressing, 0.127 mg/piece, 0.524 mg/piece and 1.139 mg/piece); the medical cloth is viscose non-woven cloth with three specifications and an area of 2cm multiplied by 3 cm.

The instrument equipment comprises: SX-500 steam sterilizer, TOMY; BS2202 model 2202S electronic balance, sydow sedolis corporation; HFsafe-1200 TE biosafety cabinet, Shanghai Lianshen scientific instruments Co., Ltd; LRH-250F biochemical incubator, Shanghai-Hengscientific instruments, Inc.; LRH-250F biochemical incubator, Shanghai-Hengscientific instruments, Inc.; IPP260 mould incubator, Memmer; vortex mixer, IKA, germany.

Culture medium and diluent: nutrient agar medium, beijing luoqiao technology ltd, lot number: 180507, respectively; sha's glucose agar medium, Beijing Luqiao technology Limited liability company, lot number: 191122, respectively; sterile phosphate buffer, manufacturer: beijing Luqiao technology corporation, lot number: 200806.

test bacteria: staphylococcus aureus (Staphylococcus aureus) [ CMCC (B) 26003 ], Escherichia coli (Escherichia coli) [ CMCC (B) 44102 ], Pseudomonas aeruginosa (Pseudomonas aeruginosa) [ CMCC (B) 10104 ], Bacillus subtilis [ CMCC (B) 63501 ], Candida albicans [ CMCC (F) 98001 ], Aspergillus niger (Aspergillus niger) [ CMCC (F) 98003 ], all of which are from the center for Chinese medicine bacterial management and the strain for working was deposited at the 3 rd generation.

Preparing bacterial liquid: taking a fresh culture of a nutrient agar culture medium slope of staphylococcus aureus, escherichia coli, pseudomonas aeruginosa, bacillus subtilis, candida albicans and aspergillus niger strains, washing down lawn by using 5mL phosphate buffer solution (PBS for short) to enable the lawn to be suspended uniformly, and then diluting the lawn to a required concentration by using the PBS.

Test product inoculation and viable bacteria colony counting: 4 test pieces (2 cm. times.3 cm) and 4 control pieces (the same material as the test piece, the same size, but containing no antibacterial material, and subjected to sterilization treatment) were each taken and divided into 4 groups and placed in 4 sterilization plates. Taking the prepared bacteria content about 10⁵0.1mL of test bacterial liquid of cfu/mL staphylococcus aureus, escherichia coli, pseudomonas aeruginosa, bacillus subtilis, candida albicans and aspergillus niger is respectively dripped on each sample to be tested and each control sample, the test bacterial liquid is uniformly coated, timing is started, the test bacterial liquid acts for 2, 5, 10 and 20min, the sample is respectively thrown into a test tube containing PBS by using sterile forceps, the sample is fully and uniformly mixed and appropriately diluted, then 2-3 dilutions are taken, 0.5mL of the sample is respectively sucked and placed in two plates, 15mL of nutrient agar medium (bacteria) or Sabouraud's agar medium (mold and yeast) which is cooled to 45 ℃ is used for pouring, the plates are rotated to be fully and uniformly, the agar is turned over after solidification, and is cultured for 48h (bacteria) or 72h (mold and yeast) at 35 ℃ to be used for counting viable bacterial colonies. The test pieces at four concentrations were all tested according to the test procedure described above.

The bacteriostatic rate is calculated according to the following formula after repeating the test for 3 times, and the bacteriostatic rate result is shown in the following table X₄(a-B)/ax100%; in the formula: x₄-bacteriostatic rate,%; a-average colony number of control samples; b-average colony number of test sample.

Three iodine concentration nonwoven cloth bacteriostasis rate

9. Study on bactericidal action of iodine complex with different formulations (concentrations)

The formula is as follows: the same as test 8.

The main apparatus comprises: the same as experiment 8.

Test for sterilizing Properties

Culture medium and diluent: nutrient agar medium, beijing luoqiao technology ltd, lot number: 180507, respectively; sha's glucose agar medium, Beijing Luqiao technology Limited liability company, lot number: 191122, respectively; sterile phosphate buffer, manufacturer: beijing Luqiao technology corporation, lot number: 200806.

test bacteria: staphylococcus aureus, Escherichia coli, Pseudomonas aeruginosa, Bacillus subtilis, Candida albicans and Aspergillus niger, wherein the standard strains are all from the China center for medical bacteria preservation and management, and the strain for work is 3 rd generation.

Preparing bacterial liquid: taking a fresh culture of a nutrient agar culture medium slope of staphylococcus aureus, escherichia coli, pseudomonas aeruginosa, bacillus subtilis, candida albicans and aspergillus niger strains, washing down lawn by using 5mL phosphate buffer solution (PBS for short) to enable the lawn to be suspended uniformly, and then diluting the lawn to a required concentration by using the PBS.

And (3) identification test of a neutralizer: the bactericidal performance test must pass the following neutralizer identification test.

The test sample is composed of three iodine concentrations: 0.127 mg/tablet, 0.524 mg/tablet, 1.139 mg/tablet, and 1.139 mg/tablet with the highest iodine concentration were selected as the neutralizer identification test, and if passing, the other 2 kinds of samples were tested by the same method.

Grouping tests: (1) a bacterial specimen plus 5ml PBS; (2) a bacterial-contaminated sample plus 5mL of a neutralizer; (3) the picture of the infected bacteria +5mL neutralizing agent; (4) taking a sample, 5mL of neutralizing agent and a bacterial infection picture; (5) the picture of the infected bacteria +5 mLPBS; (6) PBS of the same batch; (7) neutralizing agent in the same batch; (8) the culture medium is prepared in the same batch.

And (5) judging a result: (1) group 1 was either sterile or had only a very small number of colonies of test bacteria growing; (2) group 2 had more test bacteria than group 1, but less test bacteria than groups 3, 4, and 5; (3) groups 3, 4 and 5 had similar amounts of test bacteria and were grown at 1X 10⁴-9×10⁴The colony number error among cfu/plate is not more than 15 percent; (4) groups 6-8 were grown aseptically; (5) the qualification evaluation was obtained in 3 consecutive tests.

The identification test result of the bacterial neutralizer is as follows: culture medium: nutrient agar medium, culture temperature: 35 ℃, time: and (5) 48 h.

Identification test result of bacterial neutralizing agent (neutralizing agent: 5ml 20% Tween 80 in PBS)

The results show that the colony numbers of the 3 rd to 5 th groups of staphylococcus aureus, escherichia coli, pseudomonas aeruginosa and bacillus subtilis have errors of no more than 15 percent, the standard evaluation rules are met, and the neutralizer identification test is passed.

The identification test result of the mould and yeast neutralizer is as follows: culture medium: saxifrage glucose agar medium, culture temperature: 25 ℃, culture time: and 72 h.

Identification test result of mold and yeast neutralizer (neutralizer: 5ml 20% Tween 80 PBS)

The results show that the colony number error of the candida albicans and the aspergillus niger does not exceed 15%, the standard evaluation specification is met, and the neutralizer identification test is passed. Therefore, three iodine-containing concentrations: 0.127 mg/tablet, 0.524 mg/tablet, 1.139 mg/tablet can be sterilized by 5ml of 20% Tween 80PBS neutralizer.

Test for sterilizing Properties

Test product inoculation and viable bacteria colony counting:

4 test pieces (2 cm. times.3 cm) and 4 control pieces (the same material as the test piece, the same size, but containing no antibacterial material and subjected to sterilization) were each taken and divided into 4 groups and placed in 4 sterilization plates.

Taking the prepared bacteria content about 10⁵0.1mL of staphylococcus aureus, escherichia coli, pseudomonas aeruginosa, bacillus subtilis, candida albicans and aspergillus niger test bacterial liquid of cfu/mL, respectively dripping 0.1mL of the test bacterial liquid on each sample to be tested and each control sample, uniformly coating, starting timing, acting for 2, 5, 10 and 20min, respectively putting the sample slices into a neutralizing agent test tube containing 5mL of 20% tween 80PBS by using sterile forceps, fully and uniformly mixing, appropriately diluting, then taking 2-3 dilutions, respectively sucking 0.5mL, putting the 0.5mL into two plates, pouring 15mL of nutrient agar medium (bacteria) or saxashi agar medium (mold and yeast) cooled to 45 ℃, rotating the plates to fully and uniformly stir the plates, turning the plates after agar solidification, and culturing for 48h (bacteria) or 72h (mold and yeast) at 35 ℃ to count viable bacterial colonies. All three concentration test pieces were subjected to the above test procedure.

Sterilization rate calculation mode and result: after repeating the test 3 times, the sterilization rate was calculated according to the following formula, and the sterilization rate results are shown in the following table, wherein X3 ═ a-B/a × 100% formula: X3-Sterilization Rate,%; a-average colony number of control sample, B-average colony number of test sample.

Three iodine concentration nonwoven fabrics sterilizing rate

And (3) knotting: the iodine content is 0.127 mg/tablet, and the non-woven fabric has the sterilization effect (the sterilization rate is more than or equal to 90 percent) on staphylococcus aureus, escherichia coli, pseudomonas aeruginosa, candida albicans and aspergillus niger and weak sterilization on bacillus subtilis. The iodine content is 0.524 mg/piece, and the non-woven fabric has sterilization effect (sterilization rate is more than or equal to 90%) on staphylococcus aureus, escherichia coli, pseudomonas aeruginosa, candida albicans and aspergillus niger and has no sterilization effect on bacillus subtilis. The iodine content is 1.139 mg/tablet, and the non-woven fabric has the sterilization effect (the sterilization rate is more than or equal to 90%) on staphylococcus aureus, escherichia coli, pseudomonas aeruginosa, candida albicans and aspergillus niger and weak sterilization on bacillus subtilis.

Examination of bacteriostatic efficacy (zone of inhibition) of 10 iodine-containing composite nonwoven Fabric

The bacteriostat is continuously dissolved and diffused by the agar to form different concentration gradients so as to show the bacteriostasis. The experiment judges whether the bacteriostatic ability is possessed or not according to the size of the bacteriostatic ring.

The standard strains are all from China medical bacteria preservation and management center, and the strains for work are generation 2.

Respectively inoculating staphylococcus aureus, pseudomonas aeruginosa, bacillus subtilis and escherichia coli into a trypticase soytone liquid medium, and culturing at 33 ℃ for 24 hours; candida albicans was inoculated into a liquid culture medium of Sabouraud's dextrose and cultured at 23 ℃ for 2 days. Preparing the culture into bacterial suspension with proper concentration by using 0.9% sterile sodium chloride solution; inoculating Aspergillus niger on a Sabouraud dextrose agar culture medium, culturing at 23 ℃ for 7 days, adding 5ml of 0.9% sterile sodium chloride solution containing 0.05% (ml/ml) of polysorbate 80, eluting spores, collecting spore suspension, and preparing the spore suspension with 0.9% sterile sodium chloride solution containing 0.05% (ml/ml) of polysorbate 80 into the spore suspension with proper concentration.

Preparing bacterial liquid for bacteriostatic efficacy test, collecting liquid culture of Pseudomonas aeruginosa, Staphylococcus aureus, Escherichia coli and Candida albicans, centrifuging, collecting thallus, diluting with 0.9% sterile sodium chloride solution, and making into liquid culture containing bacteria about 10 per 1ml⁸Bacterial suspension of cfu. Adding fresh culture of Aspergillus niger into 0.9% sterile sodium chloride solution containing 0.05% (ml/ml) polysorbate 80, eluting spore, sucking spore suspension by suitable method, adding 0.9% sterile sodium chloride solution containing 0.05% (ml/ml) polysorbate 80 to obtain a solution containing about 10 spores per 1ml⁶Spore suspension of cfu. The number of bacteria contained in 1ml of the bacterial suspension was measured.

An LDZX-30KBS pressure steam sterilizer, an XY500 JC electronic balance of Shanghai Shenan medical instrument factory, a Henzhou city lucky electronic equipment Co.Ltd HF1500TE biosafety cabinet, a Lixin instruments Co.Ltd HFsafe-1800TE II, a B2 biosafety cabinet, a Shanghai Lianshi scientific instruments Co.Ltd BSD-TX 345 desk type constant temperature oscillator, a Shanghai Bohemian industry Co.Ltd HH-series electric heating constant temperature water bath, a Beijing Kewei Yongxing instruments Co.Ltd LRH-250F biochemical incubator, a Shanghai Hengshi scientific instruments Co.Ltd MJ 250FI mould incubator, a Shanghai Hengshi scientific instruments Co.Ltd VORTEX-5 VORTEX mixer, a Heiman Hubeier instruments manufacturing Co. Ltd-4C + pH meter, a Chenghai Shizhou Fangji scientific instruments Co.PDL-80-2B low speed desk type scientific instrument factory.

Culture medium trypticase soy peptone agar medium, Beijing three pharmaceutical technology development company, lot number: 200326, respectively; sha's glucose agar medium, Beijing three-drug technology development company, lot number: 190306, respectively; tryptone soy peptone broth, Beijing three pharmaceutical technology development, lot number: 190113, respectively; liquid culture medium of Sa's glucose, Beijing three-drug technology development company, lot number: 180629, respectively; ph7.0 sterile sodium chloride-peptone buffer, beijing three pharmaceutical technology development company, lot No.: 200103, respectively; peptone, Beijing three pharmaceutical sciences development company, lot number: 180717, respectively; 0.9% sterile sodium chloride solution (sodium chloride, Tianjin, Tianli chemical reagent Co., Ltd., lot number: 20171208, formulated and sterilized according to pharmacopoeia requirements). The inspection of the applicability of the prepared tryptone soy peptone agar culture medium, tryptone soy peptone liquid culture medium, Sa's glucose agar culture medium and Sa's glucose liquid culture medium conforms to the microbial limit inspection of non-sterile products in the 'Chinese pharmacopoeia' 2015 edition: count check method (general rule 1105) requires.

Complexing iodine samples: iodine complex (amino acid), small batch 1, 0.0336 mg/tablet, 0.2090 mg/tablet.

In the experimental process, the test samples have different antibacterial effects under the action of different water contents, so the test samples are divided into three conditions of dry tablets, water addition of 5 and 10 mu l for investigation, and the antibacterial effect inspection result is determined.

Preparing a test sample: the sample is cut into a round piece with the diameter of 5 mm. In order to ensure the test result to be accurate, two tests are carried out in parallel. (2) Preparation of negative control sample: taking the spinning cloth without the antibacterial component, and cutting the spinning cloth into a circular sheet with the diameter of 5 mm. (3) Inoculation of test bacteria: sucking 0.1ml of prepared test bacterium suspension of staphylococcus aureus, pseudomonas aeruginosa, bacillus subtilis, escherichia coli, candida albicans and aspergillus niger, dripping the test bacterium suspension onto the surface of a trypticase soytone agar medium plate, and uniformly smearing the test bacterium suspension. The plate was covered and dried for 5 min. (4) Sticking bacteriostatic agent sample pieces: the sample pieces are attached to the surface of the flat plate by using sterile forceps, one dish is used, and the distance between the centers of the sample pieces is more than 25mm, and the distance between the centers of the sample pieces and the periphery of the flat plate is more than 15 mm. After the sample is placed, the sample is lightly pressed by using sterile tweezers to be tightly attached to the surface of the flat plate. And covering the plate, placing the plate in a biochemical incubator at 33 ℃, and culturing for 18-24h to observe the result. The diameter of the antibacterial ring was measured with a vernier caliper and recorded.

The experimental result shows that the culture medium is trypticase soy peptone agar culture medium, and the culture temperature is as follows: at 33 ℃, for 18-24 h; the experimental results show that: 1) the iodine content is 0.0366 mg/tablet, has obvious inhibiting effect on staphylococcus aureus, and has no obvious inhibiting effect on pseudomonas aeruginosa, escherichia coli, candida albicans and aspergillus niger. 2) The iodine content is 0.2090 mg/tablet, and the tablet has inhibitory effect on Staphylococcus aureus, Bacillus subtilis, Escherichia coli, and Candida albicans without adding water, and has insignificant inhibitory effect on Pseudomonas aeruginosa and Aspergillus niger.

The iodine content is 0.2090 mg/tablet, 5 μ l of water for injection is injected into the tablet surface, the tablet has inhibitory effect on Staphylococcus aureus, Bacillus subtilis, Escherichia coli, and Candida albicans, and has no significant inhibitory effect on Pseudomonas aeruginosa and Aspergillus niger. 4) The tablets are doubled, and 10 mul of injection water is injected into the surfaces of the tablets, so that the tablets have obvious inhibition effect on staphylococcus aureus, bacillus subtilis, escherichia coli, candida albicans, pseudomonas aeruginosa and aspergillus niger, but have certain inhibition effect on pseudomonas aeruginosa and aspergillus niger. Some of the results are shown in the figure.

11. Virus inhibiting effect of non-woven fabric containing iodine

Experimental materials, RD cells, Huh7 cells, 293T cells. Novel enterovirus type 71 (EV71), echovirus and novel coronavirus pseudovirus (luciferase type). DMEM culture medium, PBS buffer solution and pancreatin;luminescent Cell visual Assay andLuciferase Assay System。

PVP-I solution, povidone iodine containing nonwoven (formulation as test 8). The iodine carrying capacity of the second batch of the industrialization (single dipping and single rolling, process adjustment) is 0.059,0.139,0.234 and 0.353mg/cm²。

Laboratory apparatus, Neo 2 multifunctional microplate reader, CO₂Incubator, inverted fluorescence microscope.

Experimental methods

1) Preparing virus: the EV71 virus and Echo virus strains are stored in a West-Ann cross-bred microorganism laboratory, are subjected to passage amplification by RD cells, and the virus titer is determined by a CPE method; the novel coronavirus pseudovirus is produced by 293T cell packaging, is used after ultracentrifugation and concentration, and the relative titer is determined by luciferase activity.

2) Determining the toxicity of iodine solution to RD cells and Huh7 cells, treating the cells for 24 hours by 0-10 mg/ml PVP-I solution, and determining the cell viability after 24 hoursLuminescent Cell Viability Assay.

3) The antiviral effect of iodine solution on virus was determined, based on the above results, the virus was pretreated in two pretreatment modes (4 ℃, 1h and 10min at room temperature) at a volume of 1:1, with a concentration without cytotoxicity being selected. Then, the virus was added to the cells, and after incubation for 24 hours, the infection inhibitory effect on the virus was measured. EV71 and Echo can produce obvious CPE, and the virulence of the virus is reflected by Cell viability which is reflected by CellLuminescent Cell Viability Assay. The viability of the new coronaviruses is reflected by the contained Nanoluc luciferase activity, using NanoThe Luciferase Assay System.

4) Determining the antiviral effect of the iodine-containing non-woven fabric on viruses: iodine in the control cloth and the cloth with different iodine loads was dissolved in 250ul PBS, vortexed twice, and centrifuged twice instantaneously. And (3) determining the toxicity of the eluate to cells, pretreating the iodine solution and the virus solution with the concentration to be determined at room temperature for 10min, infecting host cells, culturing at 37 ℃ for 24h, and determining the inhibitory action of the iodine solution to the viruses by detecting the cell viability.

The inhibition effect of different educts on the host cell infected by the new coronavirus is determined: pretreating iodine solution and virus solution at room temperature for 10min, infecting host cells, culturing at 37 deg.C for 24 hr, and determining the inhibition effect of iodine solution on virus infection by determining luciferase activity.

Results of the experiment

1) The iodine solution has toxicity to RD cells and Huh7 cells, both of which have certain tolerance to PVP-I solution, and cell viability experiments show that the viability is slightly reduced at concentrations of 7.5 and 10mg/ml, which indicates that cytotoxicity may exist. Based on this part of the results, subsequent experiments were performed with iodine concentrations not exceeding 5 mg/ml.

2) Analysis of antiviral effect of iodine solution on EV 71: the cells of the virus-free infection group grow well, and most of the cells of the virus-free treatment group die, so that the experiment is proved to be reliable. ② in the concentration of the iodine solution (0,0.5,1,2,3,5mg/ml), 5mg/ml of iodine solution can completely kill EV71 virus, 3mg/ml of iodine solution also shows virucidal effect, and the low-concentration iodine solution has poor antiviral effect. ③ two pretreatment modes, room temperature 10min and 4 ℃ 1h, the antiviral effect is similar.

3) Analysis of antiviral effect of iodine solution on Echo virus: the cells of the virus-free infection group grow well, and most of the cells of the virus-free treatment group die, so that the experiment is proved to be reliable. ② in the concentration of the iodine solution (0,0.5,1,2,3,5mg/ml), 5mg/ml iodine solution can completely kill Echo virus, 3mg/ml iodine solution also shows virucidal effect, and low-concentration iodine solution does not show obvious antiviral effect. ③ two pretreatment modes, room temperature 10min and 4 ℃ 1h, the antiviral effect is similar. The effect is better when the temperature is 10 min.

4) And (3) analyzing the antiviral effect of iodine solution on the new coronavirus: the experimental result shows that the two pretreatment modes have similar effects, and a room-temperature 10min treatment method is adopted for the pretreatment mode of the new coronavirus. ② in the concentration of the iodine solution (0,0.5,1,2,3,5mg/ml), the iodine solution of 3,5mg/ml can basically completely inactivate pseudoviruses, the iodine solution of 2mg/ml also shows very strong antiviral activity, and the iodine solution of lower concentration does not show antiviral effect.

5) Analysis of antiviral effect of iodine-containing nonwoven fabric on EV71 virus: the cells of the virus-free infection group grow well, and most of the cells of the virus-free treatment group die, so that the experiment is proved to be reliable. Secondly, the third part of results shows that the iodine carrying capacity is higher, the iodine carrying capacity possibly generates toxicity to cells, and RD cells are more sensitive, so that the experiment is further diluted in half and half to obtain (D1-D4) on the basis of obtaining four cloth iodine solutions (C1-C4) by adopting a conventional method, and the antiviral effects of the four cloth iodine solutions are measured together. ③ C1-C4 can inhibit EV71 virus at four concentrations, and the reduction of cell activity in the high concentration group is related to the cell toxicity. D2-D4 also completely inhibited viruses, but D1 did not completely inhibit viruses effectively.

6) Analysis of antiviral effect of iodine-containing nonwoven fabrics on Echo virus: overall results were similar to EV71 virus. The cells of the virus-free infection group grow well, and most of the cells of the virus-free treatment group die, so that the experiment is proved to be reliable. Secondly, the third part of results shows that the iodine carrying capacity is higher, the iodine carrying capacity possibly generates toxicity to cells, and RD cells are more sensitive, so that the experiment is further diluted in half and half to obtain (D1-D4) on the basis of obtaining four cloth iodine solutions (C1-C4) by adopting a conventional method, and the antiviral effects of the four cloth iodine solutions are measured together. ③ C2-C4 can inactivate the Echo virus at four concentrations, C1 can inactivate the virus partially, and the reduction of the cell activity of the high concentration group is related to the cell toxicity. D2-D4 also completely inhibited viruses, but D1 did not completely inhibit viruses effectively.

7) The result of the anti-virus effect of the iodine-containing non-woven fabric on the new corona pseudovirus is analyzed: the above results suggest that the Huh7 cells are relatively well-tolerated by the eluate, so this experiment was performed only for four concentrations of C1-C4. ② C1-C4 all show strong virus inactivation capability and show relative dose dependence phenomenon.

And (4) conclusion: 1. povidone iodine solution experiments prove that povidone iodine with the concentration of 3-5mg/ml can generate obvious inhibition effects on the three viruses, and the new coronavirus is more sensitive to the povidone iodine; 2. in the iodine-containing nonwoven fabric test, four kinds of nonwoven fabrics all show obvious antiviral effect, but it is noted that the iodine solution with high concentration may generate certain toxicity to cells.

In the process research, different iodine preparations are screened and tried, and specific formula examples are summarized into two main categories including:

partial example 1

When the main drugs are polyvinylpyrrolidone iodine (povidone iodine) and polyvinyl alcohol iodine, the basic preparation process is as follows:

preparing a drug-loading system: mixing and dissolving the iodine-compound, the adhesive (selected), the stabilizer (selected), the softening agent and the volatile solvent according to the prescription amount, and then storing in a dark place;

carrying out medicine carrying cloth: selecting the types of the cloth listed in the prescription, and punching and cutting the cloth in advance according to the requirement;

the basic process flow of the process is as follows: after the liquid medicine is prepared, the cloth is planted into a groove or placed into a spraying vessel, the cloth is soaked for 0.5-1min (or evenly sprayed), after the cloth is saturated in adsorption, a part of the liquid medicine is slightly left to be emptied, the cloth can be guided into a rolling mill to remove part of the liquid or not be treated, and the cloth is dried to obtain the final medicine-carrying cloth.

Cutting according to the requirement, and storing in shade, dry and dark conditions.

Samples were prepared as follows:

1) the drug-loaded solvent is: PEG 300-4003-10%

Polyvinyl pyrrolidone iodine 1-5%

Adding water to 100%

The medicine carrying cloth is as follows: 25-60g/m of degreased cotton cloth³Or viscose non-woven fabric 25-60g/m³Or chitosan non-woven fabric 25-60g/m³Or 25-60g/m of alginate fiber non-woven fabric³

2) The drug-loaded solvent is: PEG 1000-20003-15%

PEG300-400 0-15％

Polyvinyl pyrrolidone iodine 5-10%

0 to 40 percent of ethanol

Adding water to 100%

The medicine carrying cloth is as follows: 50-120g/m of viscose non-woven fabric³Or 50-120g/m of degreased cotton cloth³Or seaweed non-woven fabric 50-120g/m³Or chitosan non-woven fabric 45-100g/m³

3) The drug-loaded solvent is: 3 to 10 percent of glycerol

1 to 10 percent of polyvinylpyrrolidone iodine

0 to 40 percent of ethanol

4070-30% of poloxamer

Adding water to 100%

The medicine carrying cloth is as follows: 25-110g/m of viscose non-woven fabric³Or 25-120g/m of degreased cotton cloth³Or chitosan non-woven fabric 25-120g/m³Or seaweed non-woven fabric 25-120g/m³

4) The drug-loaded solvent is: 68-1275-30% of poloxamer

1 to 10 percent of amino acid iodine

3 to 10 percent of polyvinyl pyrrolidone

Adding water to 100%

The medicine carrying cloth is as follows: 25-120g/m of viscose non-woven fabric³Or 25-120g/m of degreased cotton cloth³

5) The drug-loaded solvent is: 3-10% of propylene glycol

1 to 10 percent of polyvinyl pyrrolidone

0 to 40 percent of ethanol

PEG3000-4000 0-30％

Adding water to 100%

The medicine carrying cloth is as follows: 25-120g/m of viscose non-woven fabric³Or take offFat cotton cloth 25-120g/m³

6) The drug-loaded solvent is: 3-10% of propylene glycol

Polyvinyl alcohol iodine 1-15%

0.1 percent of potassium iodide

Poloxamer 1880-30%

Adding water to 100%

The medicine carrying cloth is as follows: 25-120g/m of viscose non-woven fabric³Or 25-120g/m of degreased cotton cloth³Or chitosan non-woven fabric 25-120g/m³Or 25-120g/m of alginate fiber non-woven fabric³

7) The drug-loaded solvent is: 3-10% of propylene glycol

Polyvinyl alcohol iodine 1-15%

0.1 percent of potassium iodate

PEG3000-4000 0-30％

Adding water to 100%

The medicine carrying cloth is as follows: 25-120g/m of viscose non-woven fabric³Or 25-120g/m of degreased cotton cloth³Or chitosan non-woven fabric 25-120g/m³Or 25-120g/m of alginate fiber non-woven fabric³

8) The drug-loaded solvent is: 3-10% of polyethylene glycol (PEG)

Polyvinyl alcohol iodine 1-15%

Sodium iodide 0.1%

4070-30% of poloxamer 188-

Adding water to 100%

The medicine carrying cloth is as follows: 25-120g/m of viscose non-woven fabric³Or 25-120g/m of degreased cotton cloth³Or silk non-woven fabric 25-120g/m³

Partial example 2

When the main drugs are double-chain quaternary ammonium salt iodine, methionine iodine, polyethylene glycol iodine (PEG-I) and the like, the adopted iodine compound has no adhesion, and the basic preparation process comprises the following steps:

preparing a drug-loading system: mixing and dissolving the iodine-compound, the adhesive, the stabilizer (optional), the softening agent and the volatile solvent according to the prescription amount, and storing in a dark place;

carrying out medicine carrying cloth: selecting the types of the cloth listed in the prescription, and punching and cutting the cloth in advance according to the requirement;

the basic process flow of the process is as follows: after the liquid medicine is prepared, the cloth is planted into a groove or placed into a spraying vessel, the cloth is soaked for 0.5-1min (or evenly sprayed), after the cloth is saturated in adsorption, a part of the liquid medicine is slightly left to be emptied, the cloth can be guided into a rolling mill to remove part of the liquid or not be treated, and the cloth is dried to obtain the final medicine-carrying cloth.

Cutting according to the requirement, and storing in shade, dry and dark conditions.

Samples were prepared as follows:

1) the drug-loaded solvent is: 3 to 10 percent of glycerol

1-10% of methionine iodine

Polyvinyl alcohol 3%

0 to 30 percent of isopropanol

PEG3000-4000 5-30％

Adding water to 100%

The medicine carrying cloth is as follows: 25-120g/m of viscose non-woven fabric³Or silk non-woven fabric 30-120g/m³Or chitosan non-woven fabric 25-120g/m³Or 25-120g/m of alginate fiber non-woven fabric³

2) The drug-loaded solvent is: 4073-35% of poloxamer 188-

1 to 8 percent of polyethylene glycol iodine

Polyvinyl pyrrolidone 5-10%

0.1 percent of potassium iodide

Adding water to 100%

The medicine carrying cloth is as follows: 25-120g/m of viscose non-woven fabric³Or silk non-woven fabric 25-120g/m³

3) The drug-loaded solvent is: 5-10% of propylene glycol

1-10% of methionine iodine

0.1 percent of potassium iodide

0 to 1 percent of polyacrylate

Polyethylene glycol 3000-40000-20%

Adding water to 100%

The medicine carrying cloth is as follows: viscose non-woven fabric 35-120g/m³Or 25-120g/m of degreased cotton cloth³

4) The drug-loaded solvent is: 5 to 10 percent of PEG

Methionine iodine 1-5%

Vinyl acetate 5-10%

Polyethylene glycol 3000-40000-10%

60 percent of ethanol

Adding water to 100%

The medicine carrying cloth is as follows: 30-60g/m of terylene and viscose (mixed in a ratio of 2-5: 8-5) non-woven fabric³Or chitosan non-woven fabric 25-50g/m³Or seaweed non-woven fabric 25-50g/m³

5) The drug-loaded solvent is: 5-10% of glycerol

Polyether alcohol iodine 1-10%

3 to 9 percent of polyvinyl pyrrolidone

50 percent of isopropanol

Polyethylene glycol 3000-40000-25%

Adding water to 100%

The medicine carrying cloth is as follows: 30-100g/m of viscose and terylene (mixed in a ratio of 8-5: 2-5) non-woven fabric³

6) The drug-loaded solvent is: 3 to 10 percent of PEG

Polyether alcohol iodine 1-12%

0.2 percent of potassium iodate

2 to 8 percent of polyamide

4070-30% of poloxamer 188-

Adding water to 100%

The medicine carrying cloth is as follows: 25-120g/m of viscose non-woven fabric³Or 25-120g/m of degreased cotton cloth³Or chitosan non-woven fabric 25-120g/m³Or 25-120g/m of alginate fiber non-woven fabric³

7) The drug-loaded solvent is: 3-10% of propylene glycol

1-12% of double-chain quaternary ammonium salt iodine

2 to 8 percent of polyvinyl pyrrolidone

4070-30% of poloxamer 188-

Sodium iodide 0-0.5%

0 to 5 percent of gelatin

Adding water to 100%

The medicine carrying cloth is as follows: 25-120g/m of viscose non-woven fabric³Or 25-120g/m of degreased cotton cloth³

8) The drug-loaded solvent is: tween 20-801-5%

1-10% of double-chain quaternary ammonium salt iodine

2 to 8 percent of polyvinyl pyrrolidone

0 to 10 percent of isopropanol

Polyethylene glycol 3000-40000-20%

Adding water to 100%

The medicine carrying cloth is as follows: 30-90g/m of absorbent cotton cloth³Or viscose non-woven fabric 25-120g/m³Or chitosan non-woven fabric 25-120g/m³Or 25-120g/m of alginate fiber non-woven fabric³

9) The drug-loaded solvent is: span 20-801-5%

1-15% of double-chain quaternary ammonium salt iodine

Polyvinyl acetal 1-5%

Sodium iodide 0-0.5%

Polyethylene glycol 3000-40005-25%

0 to 50 percent of ethanol

Adding water to 100%

The medicine carrying cloth is as follows: 25-120g/m of viscose non-woven fabric³Or 25-120g/m of degreased cotton cloth³Or chitosan non-woven fabric 25-120g/m³Or 25-120g/m of alginate fiber non-woven fabric³。