阅读说明：本技术 一种抗菌抗病毒纤维布复合材料及其制备方法和用途 (Antibacterial and antiviral fiber cloth composite material and preparation method and application thereof ) 是由 姜风 于 2021-09-23 设计创作，主要内容包括：本发明涉及一种抗菌抗病毒纤维布复合材料及其制备方法和用途。所述复合材料包括纤维布基布；在纤维布基布中的各纤维表面依次设置有电气石层和抗菌抗病毒层；所述电气石层中的电气石通过硅氧键固化在纤维布基布的各纤维表面；所述抗菌抗病毒层中的抗菌抗病毒物质通过硅氨键固化在所述电气石层中的电气石表面；本发明在制备所述复合材料时采用了首次涂覆和二次涂覆工艺。本发明提供的复合材料对大肠杆菌、金黄色葡萄球菌和白色念珠菌的抗菌率在99.99％以上,对HCOV-229E冠状病毒的抗病毒率大于99.99％,可作为抗菌抗病毒空气滤布,生产各种类型过滤器,广泛用于空气净化器、净化空调、新风净化机、机动车空气滤清器等应用场所中。(The invention relates to an antibacterial and antiviral fiber cloth composite material and a preparation method and application thereof. The composite material comprises a fiber cloth base cloth; the surface of each fiber in the fiber cloth base cloth is sequentially provided with an tourmaline layer and an antibacterial and antiviral layer; the tourmaline in the tourmaline layer is solidified on the surface of each fiber of the fiber cloth base cloth through a silicon-oxygen bond; the antibacterial and antiviral substance in the antibacterial and antiviral layer is solidified on the surface of the tourmaline in the tourmaline layer through a silicon-ammonia bond; the invention adopts the primary coating and secondary coating processes when preparing the composite material. The antibacterial rate of the composite material provided by the invention to escherichia coli, staphylococcus aureus and candida albicans is more than 99.99%, and the antiviral rate to HCOV-229E coronavirus is more than 99.99%, so that the composite material can be used as antibacterial and antiviral air filter cloth to produce various filters, and can be widely applied to application places such as air purifiers, air purification air conditioners, fresh air purifiers, motor vehicle air filters and the like.)

1. The antibacterial and antiviral fiber cloth composite material is characterized by comprising fiber cloth base cloth; the surface of each fiber in the fiber cloth base cloth is sequentially provided with an tourmaline layer and an antibacterial and antiviral layer;

the tourmaline in the tourmaline layer is solidified on the surface of each fiber of the fiber cloth base cloth through a silicon-oxygen bond;

the antibacterial and antiviral substance in the antibacterial and antiviral layer is solidified on the surface of the tourmaline in the tourmaline layer through a silicon-ammonia bond.

2. The antibacterial and antiviral fiber cloth composite material as claimed in claim 1, wherein the fiber cloth base cloth is a natural fiber cloth or a chemical fiber cloth;

preferably, the natural fiber cloth is made of any one of cotton, hemp, wool or bamboo;

preferably, the chemical fiber cloth is a polyester fiber non-woven fabric and/or a polypropylene fiber non-woven fabric, preferably a polyester fiber non-woven fabric;

preferably, the gram weight of the chemical fiber cloth is in the range of 20-200g/m²Preferably 45 to 100g/m²。

3. The antibacterial and antiviral fiber cloth composite material as claimed in claim 1 or 2, wherein the tourmaline powder is contained in the tourmaline layer;

preferably, the particle size of the tourmaline powder is 30-300nm, preferably 30-100 nm;

preferably, the antibacterial and antiviral layer contains 1,3, 5-triazine-2, 4, 6-triketone sodium chloride or 5, 5-dimethyl imidazolidine-2, 4-diketone sodium chloride.

4. A method for preparing the antibacterial and antiviral fiber cloth composite material as claimed in any one of claims 1 to 3, wherein the preparation method comprises a first coating and a second coating, and comprises the following steps:

(1) mixing deionized water, tourmaline powder, 1,3, 5-triazine-2, 4, 6-triketone or 5, 5-dimethyl imidazolidine-2, 4-diketone and a silica sol solution to obtain a primary coating solution;

(2) coating the obtained primary coating liquid on two sides of the fiber cloth base cloth, and forming tourmaline layers on the surfaces of the fibers of the fiber cloth base cloth through drying treatment;

(3) mixing deionized water, sodium hypochlorite and hydrochloric acid to obtain a secondary coating solution;

(4) and (3) coating the obtained secondary coating liquid on two sides of the material obtained in the step (2), and drying to form an antibacterial and antiviral layer on the surface of the tourmaline layer.

5. The preparation method according to claim 4, wherein the first coating liquid in the step (1) comprises the following components in parts by weight:

preferably, in the secondary coating liquid in the step (3), the contents of the components in parts by weight are as follows:

100 parts of deionized water;

1-5 parts of sodium hypochlorite;

1-5 parts of hydrochloric acid.

6. The preparation method according to claim 4 or 5, wherein the ratio of the first coating liquid to the fiber cloth-based fabric gram weight in the step (2) is 1:1-3: 1;

preferably, the weight ratio of the coating weight of the secondary coating liquid per square meter in the step (4) to the material obtained in the step (2) is 1:1-3: 1;

preferably, in the step (2) and the step (4), the temperature of the drying treatment is 110-130 ℃;

preferably, in step (2) and step (4), the drying treatment is carried out until the water content is lower than 5%.

7. The method according to any one of claims 4 to 6, characterized in that it comprises the following steps:

(1) preparation of primary coating liquid:

mixing 100 parts of deionized water, 5-15 parts of tourmaline powder, 0.05-0.25 part of 1,3, 5-triazine-2, 4,6 trione or 5, 5-dimethyl imidazolidine-2, 4-diketone and 1-5 parts of silica sol solution with the mass concentration of 20-40%, and uniformly stirring to obtain a primary coating solution;

(2) coating for the first time:

conveying the obtained primary coating liquid into a coating tank by a conveying pump, uniformly coating the primary coating liquid on two sides of fiber cloth by a press roll according to the ratio of the coating weight of the primary coating liquid per square meter to the gram weight of the fiber cloth being 1:1-3:1, drying at 110-130 ℃ until the water content is lower than 5%, and forming a tourmaline layer on the surface of each fiber of the fiber cloth;

(3) preparation of secondary coating liquid:

mixing 100 parts of deionized water, 1-5 parts of sodium hypochlorite and 1-5 parts of hydrochloric acid, and stirring until the deionized water, the sodium hypochlorite and the hydrochloric acid are completely dissolved and uniformly mixed to obtain a secondary coating solution;

(4) secondary coating:

conveying the secondary coating liquid into a coating tank by a conveying pump, enabling the fiber cloth after primary coating to pass through a compression roller, uniformly coating the secondary coating liquid on two sides of the fiber cloth after primary coating, drying at 110-130 ℃ until the water content is lower than 5%, and forming an antibacterial and antiviral layer on the surface of the tourmaline layer to obtain the antibacterial and antiviral fiber cloth composite material.

8. An antibacterial and antiviral air filtration cloth, characterized in that it comprises the antibacterial and antiviral fiber cloth composite material as claimed in any one of claims 1 to 3.

9. Use of the antibacterial and antiviral fiber cloth composite material according to any one of claims 1 to 3 or the antibacterial and antiviral air filtration cloth according to claim 8 in an air filter or a mask.

10. The use according to claim 9, wherein the antibacterial and antiviral fiber cloth composite material is used as a filter screen in an air purifier, a purifying air conditioner, a fresh air purifier or an air cleaner of an automobile.

Technical Field

The invention relates to the technical field of air purification, in particular to a composite material and a preparation method and application thereof, and especially relates to an antibacterial and antiviral fiber cloth composite material and a preparation method and application thereof.

Background

The pathogenic bacteria in the air include hemolytic streptococcus, staphylococcus aureus, meningococcus, tubercle bacillus, bordetella pertussis, legionella, diphtheria bacillus, mycoplasma pneumoniae, etc. Common pathogenic viruses include influenza virus, coronavirus, tubercle bacillus, and the sources of these pathogenic bacteria and viruses are mainly air pollution through the exhaled air of indoor patients. Therefore, the air environment is purified, and the air quality is improved, which is an urgent need in the life of people.

Air purification materials such as masks, filter elements and the like are usually made of fiber cloth for filtering pathogenic bacteria and viruses in the air, and the fiber cloth is provided with various forms such as PP melt-blown cloth, glass fiber cloth, PTFE cloth, PET fiber cloth, various non-woven fabrics and the like. After bacteria and viruses are adsorbed on the surface of the fiber cloth, the bacteria and the viruses can survive for different time, even can survive and reproduce for a long time according to different environmental conditions, and can be diffused to the air again to cause secondary pollution. For example, coronaviruses can survive for several days on the fiber surface, and molds and legionella can survive and multiply on the fiber surface for a long time.

At present, the method for purifying bacteria and viruses in indoor air mainly comprises the following steps:

1) the disinfectant is used for disinfection, and commonly used volatile disinfectants such as alcohol, hypochlorous acid and the like can effectively kill bacteria and viruses, are volatile, are only suitable for short-time one-time disinfection and are not suitable for long-term continuous disinfection and purification of indoor environment.

2) The fiber cloth is used for filtering, bacteria and viruses exist in the air in the form of biological aerosol, the particle size is dozens of nanometers to hundreds of nanometers, the size is small, the capture efficiency of the common fiber cloth is low, the biological aerosol cannot be efficiently captured from the air, and the bacteria and the viruses are easy to breed on the surface of the fiber cloth after being captured, so that the problem of secondary pollution is caused due to secondary desorption and re-volatilization into the air.

CN112869264A discloses a monatomic medical protective mask with antibacterial and antiviral functions, which is characterized in that a fiber cloth layer containing monatomic antibacterial and antiviral catalysts is added in a first non-woven fabric layer and a melt-blown fabric layer, so that the medical protective mask has high-efficiency antibacterial and antiviral functions, has antibacterial and antiviral effects equal to those of sterilized water and alcohol, has better protective performance, and effectively avoids secondary pollution caused by random discarding of the mask. However, on one hand, the process for preparing the fiber cloth layer containing the monatomic antibacterial and antiviral catalyst is relatively complex, on the other hand, the capture efficiency of the fiber cloth layer on the bacterial virus is low, and the bioaerosol formed by the bacterial virus cannot be efficiently captured from the air, and on the other hand, the antibacterial rate of the fiber cloth layer on escherichia coli, staphylococcus aureus and candida albicans is only over 99.9%, and the antiviral rate on the HIN1 virus is only 99.9%, so the antibacterial and antiviral effects are still to be improved.

During the outbreak of new crowns, some researches show that some medicaments containing chlorine have certain effect on resisting coronavirus, and national health commission issues 'disinfectant use guide' at 18 days 2.2020, indicating that alcohol disinfectants, chlorine disinfectants, iodine disinfectants, peroxide disinfectants, guanidine disinfectants, phenol disinfectants, quaternary ammonium salt disinfectants and the like can be used; however, these disinfectants are highly volatile and do not provide long-term continuous disinfection. And the air purification material such as the filter element needs 6 months to 12 months of effective disinfection and use time.

CN111955478A discloses a sustained-release carbon-based antibacterial and antiviral composite material, which contains activated carbon loaded with nano zero-valent iron and nano silver and activated carbon loaded with graphene, and although the composite material can also effectively realize antibacterial and antiviral effects and can be applied to the fields of air purification systems and the like, on one hand, the composite material still has the problems of high manufacturing cost and relatively complex process, on the other hand, the composite material cannot efficiently capture microbial aerosol in air and rapidly kill the aerosol, on the other hand, the virus inactivation rate of HIN1 can only reach 99.89%, and the antiviral effect is still to be improved.

Therefore, the antibacterial and antiviral filter fiber cloth which can efficiently capture the microbial aerosol in the air, can quickly kill the captured bacteria and viruses and has long-acting disinfection time of 6 to 12 months has wide application value, has important significance for cutting off the air aerosol propagation path and preventing personnel cross infection if being processed into the filter screens of air purifiers, air conditioners and fresh air purifiers,

disclosure of Invention

In view of the problems in the prior art, the invention provides an antibacterial and antiviral fiber cloth composite material, and a preparation method and application thereof. Through coating tourmaline electret powder coating and antibiotic antiviral coating in proper order on the fibre cloth surface, thereby form tourmaline layer and antibiotic antiviral layer in proper order on each fibre surface of fibre cloth, because bacterial virus biological aerosol has electric charge mostly in the air, tourmaline electret powder coating can form little electric field on the fibre cloth surface, greatly increased entrapment efficiency, common bacterium and virus can be killed fast to antibiotic antiviral coating, have good effect to the protection health.

In order to achieve the purpose, the invention adopts the following technical scheme:

in a first aspect, the invention provides an antibacterial and antiviral fiber cloth composite material, which comprises a fiber cloth base cloth; the surface of each fiber in the fiber cloth base cloth is sequentially provided with an tourmaline layer and an antibacterial and antiviral layer; the tourmaline in the tourmaline layer is solidified on the surface of each fiber of the fiber cloth base cloth through a silicon-oxygen bond; the antibacterial and antiviral substance in the antibacterial and antiviral layer is solidified on the surface of the tourmaline in the tourmaline layer through a silicon-ammonia bond.

In the invention, the fiber cloth material as the base cloth is formed by weaving a plurality of cylindrical fibers in a microscopic state; the invention takes the circumferential surface of each cylindrical fiber as a substrate layer, coats a circumferential tourmaline layer on the circumferential surface for the first time, and coats a circumferential antibacterial and antiviral layer for the second time, namely, coats the tourmaline layer and the antibacterial and antiviral layer on the surface of each fiber of a fiber cloth material in sequence, thereby preparing the antibacterial and antiviral fiber cloth composite material.

According to the invention, the tourmaline layer is formed on the surface of the fiber cloth base cloth fiber, and the tourmaline layer is solidified on the surface of the fiber cloth base cloth fiber through the silicon-oxygen bond, so that the tourmaline layer can form the micro electric field on the surface of the fiber cloth, and the formed fiber cloth with the micro electric field can obviously increase the capture efficiency of the bio-aerosol, especially the capture efficiency of the micro bio-aerosol particles is obviously improved as the bio-aerosol particles containing bacteria and viruses have electric charges.

According to the invention, the antibacterial and antiviral layer is further formed on the surface of the tourmaline layer, and is bonded and solidified on the surface of the tourmaline layer through oxygen in silicon oxygen groups and nitrogen in amino groups, so that the antibacterial and antiviral layer has a more stable structure on one hand, and the effective disinfection and use time of 6-12 months can be realized; on the other hand, the antibacterial and antiviral layer can quickly kill common bacteria and viruses, and simultaneously, residual chlorine is not generated, so that the odor problem of the residual chlorine is avoided.

By detecting the antibacterial and antiviral fiber composite material provided by the invention, the antibacterial rate of the antibacterial and antiviral fiber composite material to escherichia coli, staphylococcus aureus and candida albicans is over 99.99%, and the antiviral rate to HCOV-229E coronavirus is over 99.99%, so that the antibacterial and antiviral fiber composite material can be used as antibacterial and antiviral air filter cloth and is widely applied to application places such as air purifiers, air purification conditioners, fresh air purifiers, motor vehicle air filters and the like.

Preferably, the fiber cloth base cloth is natural fiber cloth or chemical fiber cloth.

Preferably, the natural fiber cloth is made of any one of cotton, hemp, wool and bamboo.

Preferably, the chemical fiber cloth is a polyester fiber non-woven fabric and/or a polypropylene fiber non-woven fabric, and is preferably a polyester fiber non-woven fabric.

Preferably, the gram weight of the chemical fiber cloth is in the range of 20-200g/m²E.g. 20g/m²、30g/m²、45g/m²、50g/m²、60g/m²、80g/m²、100g/m²、120g/m²、150g/m²Or 200g/m²Preferably 45 to 100g/m²。

Preferably, tourmaline powder, preferably nano tourmaline electret powder is contained in the tourmaline layer.

The nano tourmaline electret powder has the function of storing charges for a long time, and can be electret by a corona charging method, a friction electrification method, a thermal polarization method and other methods, a micro electric field is formed on the surface of fiber cloth after electret, and the fiber cloth with the micro electric field can obviously increase the trapping efficiency of bioaerosol because bioaerosol particles containing bacteria and viruses have charges, and particularly the trapping efficiency of micro bioaerosol particles is obviously improved.

Preferably, the particle size of the tourmaline powder is 30-300nm, such as 30nm, 50nm, 60nm, 80nm, 100nm, 120nm, 150nm, 200nm, 250nm or 300nm, preferably 30-100 nm.

Preferably, the antibacterial and antiviral layer contains 1,3, 5-triazine-2, 4, 6-triketone sodium chloride or 5, 5-dimethyl imidazolidine-2, 4-dione sodium chloride.

According to the antibacterial and antiviral coating, firstly, oxidation state chlorine with a killing effect is grafted to amino ketone containing organic matters with a stable structure (1,3, 5-triazine-2, 4,6 trione or 5, 5-dimethyl imidazolidine-2, 4-diketone), and then the chlorinated amino ketone containing organic matters are salinized by utilizing a carbonate reaction, so that 1,3, 5-triazine-2, 4,6 trione sodium chloride or 5, 5-dimethyl imidazolidine-2, 4-diketone sodium chloride is formed, the structure is more stable, sodium hypochlorite remained after the reaction is removed by a sodium sulfite reaction, and meanwhile, the odor problem of the residual chlorine is solved.

In a second aspect, the invention provides a preparation method of the antibacterial and antiviral fiber cloth composite material according to the first aspect, the preparation method comprises a first coating and a second coating, and specifically comprises the following steps:

(1) mixing deionized water, tourmaline powder, 1,3, 5-triazine-2, 4, 6-triketone or 5, 5-dimethyl imidazolidine-2, 4-diketone and a silica sol solution to obtain a primary coating solution;

(2) coating the obtained primary coating liquid on two sides of the fiber cloth base cloth, and forming tourmaline layers on the surfaces of the fibers of the fiber cloth base cloth through drying treatment;

(3) mixing deionized water, sodium hypochlorite and hydrochloric acid to obtain a secondary coating solution;

(4) and (3) coating the obtained secondary coating liquid on two sides of the material obtained in the step (2), and drying to form an antibacterial and antiviral layer on the surface of the tourmaline layer.

According to the preparation method provided by the invention, the main component of the tourmaline powder is silicon oxide with hydroxyl, the silica sol is also a silicon oxyhydroxide solution, the surface of the fiber cloth is also provided with hydroxyl, the hydroxyl in the silica sol and the hydroxyl on the surface of the fiber cloth are condensed under the action of high temperature to form a silicon-oxygen bond which is solidified on the surface of the fiber cloth, and the hydroxyl in the tourmaline powder and the hydroxyl in the silica sol are condensed to form a silicon-oxygen bond which is also solidified on the surface of the fiber; meanwhile, silicon in silicon hydroxyl of tourmaline powder and amino in1, 3, 5-triazine-2, 4,6 trione or 5, 5-dimethyl imidazolidine-2, 4-diketone are subjected to crosslinking reaction to form a stable silicon-ammonia bond, so that the 1,3, 5-triazine-2, 4,6 trione or 5, 5-dimethyl imidazolidine-2, 4-diketone is fixed on the surface of tourmaline or fiber, and the problem of re-dissolution in the secondary coating process is avoided.

Although 1,3, 5-triazine-2, 4, 6-trione or 5, 5-dimethyl imidazolidine-2, 4-dione has certain antibacterial and antiviral effects, the efficiency is not high, the invention can greatly improve the antibacterial efficiency and the antiviral efficiency at the same time by introducing the chlorine-containing component through secondary coating), so that the antibacterial and antiviral groups are solidified on the surface of the tourmaline, the air trapping and killing can be realized at the same time, and the synergistic effect is achieved; meanwhile, sodium hypochlorite and hydrochloric acid solution are added into the secondary coating liquid, so that 1,3, 5-triazine-2, 4,6 trione or 5, 5-dimethyl imidazolidine-2, 4-diketone is converted into 1,3, 5-triazine-2, 4,6 trione sodium chloride or 5, 5-dimethyl imidazolidine-2, 4-diketone sodium chloride, and an antibacterial and antiviral layer is formed on the surface of the tourmaline layer.

Preferably, in the primary coating liquid in the step (1), the contents of the components in parts by weight are as follows:

the content of the tourmaline powder is 5 to 15 parts, and may be, for example, 5 parts, 6 parts, 7 parts, 8 parts, 9 parts, 10 parts, 11 parts, 12 parts, 13 parts, 14 parts or 15 parts.

The 1,3, 5-triazine-2, 4, 6-trione or 5, 5-dimethylimidazolidine-2, 4-dione is contained in an amount of 0.05 to 0.25 part, and may be, for example, 0.05 part, 0.1 part, 0.15 part, 0.2 part or 0.25 part.

The content of the silica sol is 1 to 5 parts, and can be 1 part, 2 parts, 3 parts, 4 parts or 5 parts for example; the silica sol may have a mass concentration of 20 to 40%, for example, 20%, 25%, 30%, 35% or 40%.

Preferably, in the secondary coating liquid in the step (3), the contents of the components in parts by weight are as follows:

100 parts of deionized water;

1-5 parts of sodium hypochlorite;

1-5 parts of hydrochloric acid.

Preferably, the sodium hypochlorite is present in an amount of 1 to 5 parts, for example 1, 2, 3, 4 or 5 parts.

Preferably, the hydrochloric acid is present in an amount of 1 to 5 parts, and may be, for example, 1 part, 2 parts, 3 parts, 4 parts, or 5 parts.

The sodium hypochlorite is white powder, and the concentration range of the hydrochloric acid is 10-37%.

Preferably, the ratio of the coating weight of the primary coating liquid per square meter to the gram weight of the fiber cloth base cloth in the step (2) is 1:1-3:1, and can be 1:1, 1.5:1, 2:1, 2.5:1 or 3:1, for example.

Preferably, the weight ratio of the secondary coating liquid in step (4) to the material obtained in step (2) per square meter of coating weight is 1:1 to 3:1, and may be, for example, 1:1, 1.5:1, 2:1, 2.5:1 or 3: 1.

Preferably, in step (4) and step (4), the temperature of the drying treatment is 110 ℃ to 130 ℃, and for example, the temperature can be 110 ℃, 115 ℃, 120 ℃, 122 ℃, 125 ℃ or 130 ℃.

Preferably, in step (4) and step (4), the drying treatment is carried out until the water content is lower than 5%.

As a preferable technical scheme of the invention, the preparation method of the antibacterial and antiviral fiber composite material comprises the following steps:

(1) preparation of primary coating liquid:

mixing 100 parts of deionized water, 5-15 parts of tourmaline powder, 0.05-0.25 part of 1,3, 5-triazine-2, 4,6 trione or 5, 5-dimethyl imidazolidine-2, 4-diketone and 1-5 parts of silica sol solution with the mass concentration of 20-40%, and uniformly stirring to obtain a primary coating solution;

(2) coating for the first time:

conveying the obtained primary coating liquid into a coating tank by a conveying pump, uniformly coating the primary coating liquid on two sides of fiber cloth by a press roll according to the ratio of the coating weight of the primary coating liquid per square meter to the gram weight of the fiber cloth being 1:1-3:1, drying at 110-130 ℃ until the water content is lower than 5%, and forming a tourmaline layer on the surface of each fiber of the fiber cloth;

(3) preparation of secondary coating liquid:

mixing 100 parts of deionized water, 1-5 parts of sodium hypochlorite and 1-5 parts of hydrochloric acid, and stirring until the deionized water, the sodium hypochlorite and the hydrochloric acid are completely dissolved and uniformly mixed to obtain a secondary coating solution;

(4) secondary coating:

conveying the secondary coating liquid into a coating tank by a conveying pump, enabling the fiber cloth after primary coating to pass through a compression roller, uniformly coating the secondary coating liquid on two sides of the fiber cloth after primary coating, drying at 110-130 ℃ until the water content is lower than 5%, and forming an antibacterial and antiviral layer on the surface of the tourmaline layer to obtain the antibacterial and antiviral fiber cloth composite material.

In a third aspect, the present invention provides an antibacterial and antiviral air filtration cloth comprising the antibacterial and antiviral fiber cloth composite material according to the first aspect.

In a fourth aspect, the present invention also provides a use of the antibacterial and antiviral fiber cloth composite material according to the first aspect or the antibacterial and antiviral air filtration cloth according to the third aspect in an air filter or a mask.

Preferably, the antibacterial and antiviral fiber cloth composite material is used as a filter screen in an air purifier, a purification air conditioner, a fresh air purifier or an air filter of a motor vehicle.

Compared with the prior art, the invention has at least the following beneficial effects:

(1) according to the invention, the tourmaline layer is formed on the surface of each fiber of the fiber cloth base cloth, and the tourmaline is solidified on the surface of the fiber cloth base cloth through the silicon-oxygen bond, so that the tourmaline layer can form a micro electric field on the surface of the fiber cloth, and as the bio-aerosol particles containing bacteria and viruses have electric charges, the formed fiber cloth with the micro electric field can obviously increase the capture efficiency of bio-aerosol, and especially the capture efficiency of micro bio-aerosol particles is obviously improved;

(2) according to the invention, an antibacterial and antiviral layer is further formed on the surface of the tourmaline, and a stable silicon-ammonia bond is formed through the crosslinking reaction of silicon in silicon hydroxyl of tourmaline powder and amino in1, 3, 5-triazine-2, 4, 6-trione or 5, 5-dimethyl imidazolidine-2, 4-diketone, so that an antibacterial and antiviral group is solidified on the surface of the tourmaline, and on one hand, the antibacterial and antiviral layer has a more stable structure, and can realize effective disinfection and use time of 6-12 months, and on the other hand, the tourmaline and the antibacterial and antiviral group have a synergistic effect, so that air capture and killing can be realized simultaneously, common bacteria and viruses can be killed quickly, no residual chlorine is generated, and the odor problem of residual chlorine is avoided;

(3) by detecting the antibacterial and antiviral fiber cloth composite material provided by the invention, the antibacterial rate of the antibacterial and antiviral fiber cloth composite material to escherichia coli, staphylococcus aureus and candida albicans is over 99.99 percent, and the antiviral rate to HCOV-229E coronavirus is over 99.99 percent, so that the antibacterial and antiviral fiber cloth composite material can be used as antibacterial and antiviral air filter cloth and is widely applied to application places such as air purifiers, air purification and conditioning, fresh air purifiers, motor vehicle air filters and the like.

Drawings

FIG. 1 is a process flow chart of the present invention for preparing antibacterial and antiviral fiber composite material.

Detailed Description

The technical solution of the present invention is further explained by the following embodiments. The following examples are merely illustrative of the present invention and do not represent or limit the scope of the claims, which are defined by the claims.

Example 1

1.1 selecting a base layer fiber filter cloth: 60g/m of wet forming process is selected²PET polyester fiber base cloth.

1.2, a manufacturing process:

1.2.1 first coating solution preparation:

as shown in fig. 1, a mixer was started, 100 parts of deionized water, 0.2 part of 1,3, 5-triazine-2, 4, 6-trione, 10 parts of tourmaline electret powder (particle size 50nm), and 3 parts of 30% silica sol were sequentially added, and mixed at high speed to form a suspended turbid coating solution.

1.2.2 first coat:

conveying the primary coating liquid into a coating tank by a conveying pump, passing the fiber cloth through a press roller, wherein the coating weight per square meter of the fiber cloth coating liquid is 114g/m²The coating liquid is uniformly coated on two sides of the fiber cloth, and the fiber cloth is dried by a drying oven tunnel type blast drying oven at the temperature of 120 ℃ until the water content is lower than 5 percent, and the gram weight of the dried fiber cloth is increased by 11.7g/m²。

1.2.3 preparation of secondary coating liquid:

as shown in fig. 1, the mixer was started, and 100 parts of deionized water, 3 parts of sodium hypochlorite and 3 parts of hydrochloric acid were sequentially added and stirred until completely dissolved and mixed.

1.2.4 Secondary coating:

conveying the secondary coating liquid into a coating tank by a conveying pump, reacting sodium hypochlorite and hydrochloric acid to generate chlorine, and reacting the 1,3, 5-triazine-2, 4, 6-trione with the chlorine by a compression roller to generate chlorinated 1,3, 5-triazine-2, 4, 6-trione sodium salt.

And uniformly coating the secondary coating liquid on two sides of the fiber cloth subjected to primary coating, and drying the fiber cloth in an oven tunnel type blast oven at the temperature of 120 ℃ until the water content is lower than 5%.

Example 2

2.1 selecting a base layer fiber filter cloth: selecting 200g/m²Polyester fiber cloth base cloth.

2.2, a manufacturing process:

2.2.1 first coating solution preparation:

as shown in FIG. 1, a mixer was started, 100 parts of deionized water, 0.25 part of 5, 5-dimethylimidazolidine-2, 4-dione, 13 parts of tourmaline electret powder (particle size: 60nm), and 4 parts of 35% silica sol were sequentially added, and mixed at high speed to form a suspended turbid coating solution.

2.2.2 first coat:

conveying the primary coating liquid into a coating tank by a conveying pump, passing the fiber cloth through a press roller, wherein the coating weight of the fiber cloth coating liquid per square meter is 200g/m²The coating liquid is uniformly coated on two sides of the fiber cloth, and the fiber cloth is dried by a drying oven tunnel type blast drying oven at the temperature of 110 ℃ until the water content is lower than 5 percent, and the gram weight of the dried fiber cloth is increased by 28g/m²。

According to EN 1822-3 High efficiency air filters (EPA, HEPA and ULPA), the efficiency of the first-time purification of the corresponding material (namely the material coated with the nano electret tourmaline) on particles with different particle sizes is tested, and the test area is 100cm²The air flow is 32L/min, and the dust source is natural dust. Respectively test 200g/m²The efficiencies of the polyester fiber cloth as it is and the fiber cloth coated with tourmaline powder are shown in table 1.

TABLE 1

Natural dust particle	Original sample purification efficiency	Coated nano electret tourmaline purification efficiency
			0.3 μm particle	1.4％	43.6％
0.5 μm particle	3.5％	55.2％
			1 μm particle	3.4％	68.4％
3 μm particles	8.3％	78.3％
			5 μm particles	34.7％	88.3％
10 μm particles	79.4％	93.4％

As can be seen from Table 1, after the tourmaline electret powder is coated, the purification efficiency of the polyester fiber on natural dust in the air is obviously increased, the structure of air microbial aerosol and natural dust particles is similar, and the conclusion can be analogized.

2.2.3 preparation of secondary coating liquid:

as shown in fig. 1, the mixer is started, 100 parts of deionized water, 4 parts of sodium hypochlorite and 5 parts of hydrochloric acid are added in sequence, and the mixture is stirred until the deionized water, the sodium hypochlorite and the hydrochloric acid are completely dissolved and uniformly mixed.

2.2.4 Secondary coating:

conveying the secondary coating liquid into a coating tank by a conveying pump, reacting sodium hypochlorite and hydrochloric acid to generate chlorine, and reacting the fiber cloth coated for the first time with the chlorine by a compression roller to generate chlorinated 5, 5-dimethylimidazolidine-2, 4-dione sodium salt.

And uniformly coating the secondary coating liquid on two sides of the fiber cloth subjected to primary coating, and drying the fiber cloth in an oven tunnel type blast oven at the temperature of 110 ℃ until the water content is lower than 5%.

Example 3

3.1 selecting a base layer fiber filter cloth: selecting 100g/m²Polyester fiber cloth base cloth.

3.2, a manufacturing process:

3.2.1 first coating solution preparation:

as shown in fig. 1, a mixer was started, 100 parts of deionized water, 0.05 part of 1,3, 5-triazine-2, 4, 6-trione, 5 parts of tourmaline electret powder (particle size 60nm), and 2 parts of 35% silica sol were sequentially added, and mixed at high speed to form a suspended turbid coating solution.

3.2.2 first coat:

conveying the primary coating liquid into a coating tank by a conveying pump, passing the fiber cloth through a press roller, wherein the coating weight of the fiber cloth coating liquid per square meter is 110g/m²The coating liquid is uniformly coated on two sides of the fiber cloth, and the fiber cloth is dried by a tunnel type blast oven at the temperature of 130 ℃ until the water content is lower than 5 percent, and the gram weight of the dried fiber cloth is increased by 6.2g/m²。

3.2.3 preparation of secondary coating liquid:

as shown in fig. 1, the mixer is started, 100 parts of deionized water, 1 part of sodium hypochlorite and 2 parts of hydrochloric acid are added in sequence, and the mixture is stirred until the deionized water, the sodium hypochlorite and the hydrochloric acid are completely dissolved and uniformly mixed.

3.2.4 Secondary coating:

conveying the secondary coating liquid into a coating tank by a conveying pump, reacting sodium hypochlorite and hydrochloric acid to generate chlorine, and reacting the 1,3, 5-triazine-2, 4, 6-trione with the chlorine by a compression roller to generate chlorinated 1,3, 5-triazine-2, 4, 6-trione sodium salt.

And uniformly coating the secondary coating liquid on two sides of the fiber cloth subjected to primary coating, and drying the fiber cloth in an oven tunnel type blast oven at the temperature of 130 ℃ until the water content is lower than 5%.

Antibacterial and antiviral performance test

According to the appendix B absorption method of GB21551.2-2010 Special requirements for antibacterial, sterilizing and purifying functional antibacterial materials for household and similar household appliances, the antibacterial rates of the fiber composite materials prepared in examples 1-3 on Escherichia coli AS1.90, Staphylococcus aureus AS1.89 and Candida albicans ATCC 10231 were tested, and the test results are shown in the specification.

TABLE 2

The "test samples" correspond to the fiber composites obtained in example 1, example 2 and example 3, respectively.

As can be seen from Table 2, the antibacterial and antiviral fiber composite materials prepared in examples 1-3 have antibacterial rates of over 99.99% for Escherichia coli, Staphylococcus aureus and Candida albicans, and have good antibacterial effects.

The fiber composites prepared in examples 1-3 were tested for their antiviral activity against HCOV-229E coronavirus according to ISO 18184 "determination of antiviral Activity for textiles", the results of which are shown in tables 3-1 (corresponding to antiviral effect of example 1), tables 3-2 (corresponding to antiviral effect of example 2) and tables 3-3 (corresponding to antiviral effect of example 3), respectively.

TABLE 3-1

TABLE 3-2

Tables 3 to 3

"experimental group" in tables 3-1 to 3-3 corresponds to the fiber composite materials obtained in example 1, example 2 and example 3, respectively.

As can be seen from tables 3-1 to 3-3, the antibacterial and antiviral fiber composite material prepared in examples 1-3 has a disease resistance rate of over 99.99% against 229E coronavirus, and has a good antiviral effect.

The results are combined to show that the antibacterial and antiviral fiber composite material provided by the invention has the antibacterial rate of over 99.99 percent on escherichia coli, staphylococcus aureus and candida albicans, has the antiviral rate of over 99.99 percent on HCOV-229E coronavirus, and has excellent antibacterial and antiviral effects.

Comparative example 1

Compared with the embodiment 1, the manufacturing process only adopts the first coating to obtain the fiber cloth coated with the tourmaline powder layer, namely, the preparation of the secondary coating solution and the secondary coating step are omitted, and the rest is the same as the embodiment 1.

Comparative example 2

Compared with the embodiment 1, the manufacturing process is the same as the embodiment 1 except that only 100 parts of deionized water, 10 parts of tourmaline powder and 3 parts of 30% silica sol are added during the first coating, and 1,3, 5-triazine-2, 4, 6-trione is not added.

The fiber composite materials prepared in comparative examples 1-2 were tested for their antibacterial activity against Escherichia coli AS1.90, Staphylococcus aureus AS1.89, and Candida albicans ATCC 10231 according to the same test methods AS in examples 1-3, and the test results are shown in Table 4.

TABLE 4

Wherein "experimental sample" corresponds to the fiber composite materials prepared in comparative example 1 and comparative example 2, respectively.

The fiber composites obtained in comparative examples 1-2 were tested for their antiviral rates against HCOV-229E coronavirus according to the same test methods as in the previous examples 1-3, and the test results are shown in Table 5-1 (corresponding to the antiviral rate of comparative example 1) and Table 5-2 (corresponding to the antiviral rate of comparative example 2), respectively.

TABLE 5-1

TABLE 5-2

"experimental group" in tables 5-1 to 5-2 corresponds to the fiber composite materials prepared in comparative example 1 and comparative example 2, respectively.

As can be seen from the results in table 4, the fiber composite materials prepared in comparative examples 1-2 only have an antibacterial rate of 71.31% or more, and a maximum antibacterial rate of 88.54% or less, against escherichia coli, staphylococcus aureus and candida albicans; as can be seen from the results of tables 5-1 and 5-2, the fiber composite material prepared in comparative examples 1-2 has an antiviral rate against HCOV-229E coronavirus of 80.57% at the highest, which is much less effective against bacteria and viruses than the fiber composite material prepared in the present application.

In conclusion, the antibacterial and antiviral fiber composite material prepared by the invention has the antibacterial rate of over 99.99 percent on escherichia coli, staphylococcus aureus and candida albicans and the antiviral rate of over 99.99 percent on HCOV-229E coronavirus, has excellent antibacterial and antiviral effects, and can be used as a filter screen in an air purifier, a purification air conditioner, a fresh air purifier or an air filter of a motor vehicle.

The applicant declares that the present invention illustrates the detailed structural features of the present invention through the above embodiments, but the present invention is not limited to the above detailed structural features, that is, it does not mean that the present invention must be implemented depending on the above detailed structural features. It should be understood by those skilled in the art that any modifications of the present invention, equivalent substitutions of selected components of the present invention, additions of auxiliary components, selection of specific modes, etc., are within the scope and disclosure of the present invention.