阅读说明：本技术 一种高吸水性抗菌无纺布及其制备方法 (High-water-absorption antibacterial non-woven fabric and preparation method thereof ) 是由 张磊 于 2020-05-06 设计创作，主要内容包括：本发明公开了一种高吸水性抗菌无纺布及其制备方法,涉及无纺布制备技术领域。本发明先用正硅酸乙酯与纳米球形三氧化二铁、十六烷基三甲基溴化铵和硅烷偶联剂KH-570共同反应后,再去除纳米球形三氧化二铁和十六烷基三甲基溴化铵制得改性二氧化硅,然后将改性二氧化硅依次包覆吸水树脂和纳米银,制得抗菌微球,再将丙烯酸树脂与亲水性单体混合,并加入光引发剂、乙酸乙酯和抗菌微球,得处理液,最后,将聚丙烯无纺布加入处理液中,混合浸渍后,取出聚丙烯无纺布,刮除多余处理液,并置于紫外灯下进行交联,得高吸水性抗菌无纺布。本发明制备的无纺布具有优良的吸水性和抗菌性。(The invention discloses a high-water-absorptivity antibacterial non-woven fabric and a preparation method thereof, and relates to the technical field of non-woven fabric preparation. The method comprises the steps of firstly carrying out a common reaction on tetraethoxysilane, nano-sphere ferric oxide, hexadecyl trimethyl ammonium bromide and a silane coupling agent KH-570, then removing the nano-sphere ferric oxide and the hexadecyl trimethyl ammonium bromide to obtain modified silicon dioxide, then sequentially coating water-absorbent resin and nano silver on the modified silicon dioxide to obtain antibacterial microspheres, mixing acrylic resin and hydrophilic monomers, adding a photoinitiator, ethyl acetate and the antibacterial microspheres to obtain a treatment solution, finally adding the polypropylene non-woven fabric into the treatment solution, mixing and impregnating, taking out the polypropylene non-woven fabric, scraping the redundant treatment solution, and placing under an ultraviolet lamp for crosslinking to obtain the high-water-absorptivity antibacterial non-woven fabric. The non-woven fabric prepared by the invention has excellent water absorption and antibacterial property.)

1. The high-water-absorption antibacterial non-woven fabric is characterized by mainly comprising the following raw material components in parts by weight: 50-80 parts of polypropylene non-woven fabric, 25-30 parts of acrylic resin, 8-18 parts of hydrophilic monomer and 3-8 parts of photoinitiator.

2. The high water absorption antibacterial non-woven fabric according to claim 1, further comprising the following raw material components in parts by weight: 5-12 parts of antibacterial microspheres.

3. The antibacterial nonwoven fabric with high water absorption according to claim 2, wherein the hydrophilic monomer is one or a combination of two of hydroxyethyl methacrylate, polyethylene glycol (400) diacrylate and trimethylolpropane triacrylate; the photoinitiator is 1-hydroxycyclohexyl benzophenone.

4. The antibacterial non-woven fabric with high water absorption according to claim 3, wherein the antibacterial microspheres are prepared by mixing and reacting modified silicon dioxide, water-absorbing resin and nano-silver, and the modified silicon dioxide is prepared by co-reacting tetraethoxysilane with nanosphere ferric oxide, hexadecyl trimethyl ammonium bromide and silane coupling agent KH-570; the water-absorbing resin is prepared by catalyzing acrylic acid, sodium hydroxide, acrylamide and allyl polyoxyethylene ether by ammonium sulfate.

5. The high water absorption antibacterial non-woven fabric according to claim 4, which is characterized by mainly comprising the following raw material components in parts by weight: 60 parts of polypropylene non-woven fabric, 25 parts of acrylic resin, 10 parts of hydrophilic monomer, 6 parts of 1-hydroxycyclohexyl benzophenone and 12 parts of antibacterial microspheres.

6. A preparation method of a high-water-absorption antibacterial non-woven fabric is characterized by mainly comprising the following preparation steps:

(1) mixing acrylic resin with a sodium hydroxide solution for reaction to prepare an acrylic acid-sodium acrylate solution, mixing modified silicon dioxide with the acrylic acid-sodium acrylate solution, adding acrylamide and allyl polyoxyethylene ether, performing ultrasonic dispersion, filtering to obtain pretreated modified silicon dioxide, mixing the pretreated modified silicon dioxide with an ammonium persulfate solution for reaction, and filtering to obtain microspheres;

(2) mixing the microspheres obtained in the step (1) with a silver ion solution, filtering to obtain pretreated microspheres, mixing the pretreated microspheres with a reducing solution, stirring for reaction, and purifying to obtain antibacterial microspheres;

(3) mixing acrylic resin and a hydrophilic monomer, adding a photoinitiator, ethyl acetate and the antibacterial microspheres obtained in the step (2) to obtain a treatment solution, washing the polypropylene non-woven fabric with acetone, adding the washed polypropylene non-woven fabric into the treatment solution, mixing and soaking, taking out the polypropylene non-woven fabric, scraping redundant treatment solution, and placing under an ultraviolet lamp for crosslinking to obtain a high-water-absorptivity antibacterial non-woven fabric;

(4) and (4) performing index analysis on the high-water-absorptivity antibacterial non-woven fabric obtained in the step (3).

7. The preparation method of the high water absorption antibacterial non-woven fabric according to claim 6, which is characterized by mainly comprising the following preparation steps:

(1) mixing acrylic resin with a sodium hydroxide solution with the mass fraction of 40% for reaction to prepare an acrylic acid-sodium acrylate solution with the neutralization degree of 80%, and mixing the modified silicon dioxide with the acrylic acid-sodium acrylate solution according to the mass ratio of 1: 15-1: 20, mixing the mixture in a beaker, adding acrylamide which is 0.25 time of the mass of an acrylic acid-sodium acrylate solution and allyl polyoxyethylene ether which is 0.08 time of the mass of the acrylic acid-sodium acrylate solution into the beaker, carrying out ultrasonic dispersion for 15min under the condition of the frequency of 45KHz, filtering to obtain pretreated modified silicon dioxide, and mixing the pretreated modified silicon dioxide with an ammonium persulfate aqueous solution with the mass fraction of 1-2% according to the mass ratio of 1:10, mixing, stirring for reaction, and filtering to obtain microspheres;

(2) mixing the microspheres obtained in the step (1) with a silver nitrate solution with the mass fraction of 10% according to the mass ratio of 1:15, stirring and mixing for 3 hours at the temperature of 45 ℃ and the rotating speed of 3500r/min, filtering to obtain pretreated microspheres, and mixing the pretreated microspheres and the reducing solution according to the mass ratio of 1: 8, mixing, stirring and reacting for 5 hours at the temperature of 60 ℃ and the rotating speed of 480r/min, filtering to obtain a filter cake, adding the filter cake into 95% ethanol by mass, adding ammonium nitrate which is 0.1-0.3 times of the mass of the ethanol, purifying for 30 minutes, filtering to obtain a pretreated filter cake, and drying the pretreated filter cake for 4 hours at the temperature of 80 ℃ to obtain the antibacterial microspheres;

(3) mixing acrylic resin and hydrophilic monomer according to the mass ratio of 2.5: 1, adding 1-hydroxycyclohexyl benzophenone which is 0.24 time of the mass of acrylic resin, ethyl acetate which is 0.3-0.6 time of the mass of acrylic resin and the antibacterial microspheres obtained in the step (2) which are 0.48 time of the mass of 1 acrylic resin, stirring and mixing to obtain a treatment solution, cleaning the polypropylene non-woven fabric with acetone for 3-6 times to obtain a pretreated polypropylene non-woven fabric, and mixing the pretreated polypropylene non-woven fabric and the treatment solution according to a mass ratio of 1: 20, mixing, soaking for 3 hours at room temperature, taking out the pretreated polypropylene non-woven fabric, scraping redundant treatment liquid on the surface of the pretreated polypropylene non-woven fabric by using a scraper, and curing for 28 seconds under an ultraviolet lamp with the wavelength of 256nm and the power of 4kW to obtain the super absorbent antibacterial non-woven fabric.

(4) And (4) performing index analysis on the high-water-absorptivity antibacterial non-woven fabric obtained in the step (3).

8. The method for preparing a super absorbent antibacterial non-woven fabric according to claim 6, wherein the modified silica in the step (1) is prepared by adding a ferric trichloride solution with a mass fraction of 2-10% into a three-necked flask containing a condenser, stirring and reacting at 100 ℃ for 72 hours, centrifuging, filtering, removing liquid to obtain nano spherical ferric trioxide, mixing and dispersing the nano spherical ferric trioxide and water in a flask according to a mass ratio of 1:100, adding hexadecyl trimethyl ammonium bromide 1-4 times the mass of the nano spherical ferric trioxide into the flask, adjusting the pH in the flask to 10, adding an ethyl orthosilicate ethanol solution with a mass fraction of 20% into the flask, stirring and reacting at 35 ℃ for 20 hours, filtering to obtain silica microspheres, mixing the silica microspheres with a hydrochloric acid solution with a mass fraction of 0.1% according to a mass ratio of 1:15, stirring and etching for 4h, filtering to obtain a modified silicon dioxide blank, calcining the modified silicon dioxide blank at the temperature of 400 ℃ for 15min to obtain a pretreated modified silicon dioxide blank, mixing the modified silicon dioxide blank with a silane coupling agent KH-570 according to the mass ratio of 1:5, adding water with the mass of 6 times of that of the silane coupling agent KH-570, stirring and mixing, filtering, and modifying the silicon dioxide.

9. The method for preparing the high water absorption antibacterial non-woven fabric according to claim 6, wherein the reducing solution in the step (2) is prepared by mixing sodium hypophosphite and sodium hexametaphosphate according to a mass ratio of 2.5: 1, adding polyvinylpyrrolidone with the mass of 0.1-0.4 times of that of sodium hypophosphite and deionized water with the mass of 5-10 times of that of the sodium hypophosphite, stirring and mixing to obtain a reducing liquid blank, and mixing the reducing liquid blank with a sulfuric acid solution with the concentration of 1mol/L according to the mass ratio of 10: 1, mixing to obtain reducing liquid.

10. The method for preparing a high water absorption antibacterial non-woven fabric according to claim 6, wherein the hydrophilic monomer in the step (3) is prepared by mixing polyethylene glycol (400) diacrylate and trimethylolpropane triacrylate according to a mass ratio of 1: 2, mixing to obtain a mixed monomer.

Technical Field

The invention relates to the field of non-woven fabric preparation, in particular to a high-water-absorptivity antibacterial non-woven fabric and a preparation method thereof.

Background

The non-woven fabric is also called non-woven fabric, is formed by oriented or random fibers, is a new generation of environment-friendly material, and has the characteristics of moisture resistance, air permeability, flexibility, light weight, no combustion supporting, easy decomposition, no toxicity, no stimulation, rich colors, low price, recycling and the like.

The non-woven fabric is a high-technology content in a flexible material production system, has wide market demand, relates to a wide-range modern material industry, develops at an astonishing speed, and is known as the 'sunward industry' in the textile industry. Although the non-woven fabrics produced by different processes have excellent effects in improving sanitary environment and facilitating use. However, human skin and clothes are places where bacteria grow, and the bacteria continuously propagate by taking human excrement such as urea in sweat as a nutrient source and simultaneously discharge ammonia with strong odor. Especially in hospitals, stations, markets, cinemas, public transport vehicles and other places, and living goods easy to breed bacteria, such as: rags, underwear, baby products, old people products, patient products and the like, and the common non-woven fabric can not effectively avoid the propagation infection and cross infection of bacteria. The development of non-woven fabrics and articles for improving the grade of sanitary articles, preventing diseases, protecting human skin, preventing diseases and protecting health become the objects of research and development. Meanwhile, the existing non-woven fabric is poor in water absorption performance and cannot meet the requirements in practical use.

Therefore, a high water absorption antibacterial non-woven fabric needs to be researched and manufactured to meet the requirement of practical use.

Disclosure of Invention

The invention aims to provide a high-water-absorptivity antibacterial non-woven fabric and a preparation method thereof, and aims to solve the problems in the background technology.

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

the high-water-absorption antibacterial non-woven fabric is characterized by mainly comprising the following raw material components in parts by weight: 50-80 parts of polypropylene non-woven fabric, 25-30 parts of acrylic resin, 8-18 parts of hydrophilic monomer and 3-8 parts of photoinitiator.

The high-water-absorptivity antibacterial non-woven fabric is characterized by also comprising the following raw material components in parts by weight: 5-12 parts of antibacterial microspheres.

Preferably, the hydrophilic monomer is one or a combination of two of hydroxyethyl methacrylate, polyethylene glycol (400) diacrylate or trimethylolpropane triacrylate; the photoinitiator is 1-hydroxycyclohexyl benzophenone.

The antibacterial microspheres are prepared by mixing and reacting modified silicon dioxide, water-absorbing resin and nano silver sol, wherein the modified silicon dioxide is prepared by co-reacting tetraethoxysilane, nano-sphere ferric oxide, hexadecyl trimethyl ammonium bromide and a silane coupling agent KH-570; the water-absorbing resin is prepared by catalyzing acrylic acid, sodium hydroxide, acrylamide and allyl polyoxyethylene ether by ammonium sulfate.

As optimization, the high-water-absorptivity antibacterial non-woven fabric mainly comprises the following raw material components in parts by weight: 60 parts of polypropylene non-woven fabric, 25 parts of acrylic resin, 10 parts of hydrophilic monomer, 6 parts of 1-hydroxycyclohexyl benzophenone and 12 parts of antibacterial microspheres.

As optimization, the preparation method of the high-water-absorptivity antibacterial non-woven fabric mainly comprises the following preparation steps:

(1) mixing acrylic resin with a sodium hydroxide solution for reaction to prepare an acrylic acid-sodium acrylate solution, mixing modified silicon dioxide with the acrylic acid-sodium acrylate solution, adding acrylamide and allyl polyoxyethylene ether, performing ultrasonic dispersion, filtering to obtain pretreated modified silicon dioxide, mixing the pretreated modified silicon dioxide with an ammonium persulfate solution for reaction, and filtering to obtain microspheres;

(2) mixing the microspheres obtained in the step (1) with a silver ion solution, filtering to obtain pretreated microspheres, mixing the pretreated microspheres with a reducing solution, stirring for reaction, and purifying to obtain antibacterial microspheres;

(3) mixing acrylic resin and a hydrophilic monomer, adding a photoinitiator, ethyl acetate and the antibacterial microspheres obtained in the step (2) to obtain a treatment solution, washing the polypropylene non-woven fabric with acetone, adding the washed polypropylene non-woven fabric into the treatment solution, mixing and soaking, taking out the polypropylene non-woven fabric, scraping redundant treatment solution, and placing under an ultraviolet lamp for crosslinking to obtain a high-water-absorptivity antibacterial non-woven fabric;

(4) and (4) performing index analysis on the high-water-absorptivity antibacterial non-woven fabric obtained in the step (3).

As optimization, the preparation method of the high-water-absorptivity antibacterial non-woven fabric mainly comprises the following preparation steps:

(1) mixing acrylic resin with a sodium hydroxide solution with the mass fraction of 40% for reaction to prepare an acrylic acid-sodium acrylate solution with the neutralization degree of 80%, and mixing the modified silicon dioxide with the acrylic acid-sodium acrylate solution according to the mass ratio of 1: 15-1: 20, mixing the mixture in a beaker, adding acrylamide which is 0.25 time of the mass of an acrylic acid-sodium acrylate solution and allyl polyoxyethylene ether which is 0.08 time of the mass of the acrylic acid-sodium acrylate solution into the beaker, carrying out ultrasonic dispersion for 15min under the condition of the frequency of 45KHz, filtering to obtain pretreated modified silicon dioxide, and mixing the pretreated modified silicon dioxide with an ammonium persulfate aqueous solution with the mass fraction of 1-2% according to the mass ratio of 1:10, mixing, stirring for reaction, and filtering to obtain microspheres;

(2) mixing the microspheres obtained in the step (1) with a silver nitrate solution with the mass fraction of 10% according to the mass ratio of 1:15, stirring and mixing for 3 hours at the temperature of 45 ℃ and the rotating speed of 3500r/min, filtering to obtain pretreated microspheres, and mixing the pretreated microspheres and the reducing solution according to the mass ratio of 1: 8, mixing, stirring and reacting for 5 hours at the temperature of 60 ℃ and the rotating speed of 480r/min, filtering to obtain a filter cake, adding the filter cake into 95% ethanol by mass, adding ammonium nitrate which is 0.1-0.3 times of the mass of the ethanol, purifying for 30 minutes, filtering to obtain a pretreated filter cake, and drying the pretreated filter cake for 4 hours at the temperature of 80 ℃ to obtain the antibacterial microspheres;

(3) mixing acrylic resin and hydrophilic monomer according to the mass ratio of 2.5: 1, adding 1-hydroxycyclohexyl benzophenone which is 0.24 time of the mass of acrylic resin, ethyl acetate which is 0.3-0.6 time of the mass of acrylic resin and the antibacterial microspheres obtained in the step (2) which are 0.48 time of the mass of 1 acrylic resin, stirring and mixing to obtain a treatment solution, cleaning the polypropylene non-woven fabric with acetone for 3-6 times to obtain a pretreated polypropylene non-woven fabric, and mixing the pretreated polypropylene non-woven fabric and the treatment solution according to a mass ratio of 1: 20, mixing, soaking for 3 hours at room temperature, taking out the pretreated polypropylene non-woven fabric, scraping redundant treatment liquid on the surface of the pretreated polypropylene non-woven fabric by using a scraper, and curing for 28 seconds under an ultraviolet lamp with the wavelength of 256nm and the power of 4kW to obtain the super absorbent antibacterial non-woven fabric.

(4) And (4) performing index analysis on the high-water-absorptivity antibacterial non-woven fabric obtained in the step (3).

Optimally, the preparation method of the modified silicon dioxide in the step (1) comprises the steps of adding 2-10% by mass of ferric trichloride solution into a three-necked bottle containing a condenser, stirring and reacting for 72 hours at 100 ℃, then centrifugally separating, filtering, removing liquid to obtain nano spherical ferric trioxide, mixing and dispersing the nano spherical ferric trioxide and water in a mass ratio of 1:100 in the flask, adding hexadecyl trimethyl ammonium bromide which is 1-4 times of the mass of the nano spherical ferric trioxide into the flask, adjusting the pH in the flask to 10, adding 20% by mass of ethyl orthosilicate ethanol solution into the flask, stirring and reacting for 20 hours at 35 ℃, filtering to obtain silicon dioxide microspheres, mixing the silicon dioxide microspheres with 0.1% by mass of hydrochloric acid solution in a mass ratio of 1:15, stirring and etching for 4 hours, filtering, and (2) obtaining a modified silica blank, calcining the modified silica blank at the temperature of 400 ℃ for 15min to obtain a pretreated modified silica blank, mixing the modified silica blank with a silane coupling agent KH-570 according to the mass ratio of 1:5, adding water with the mass of 6 times that of the silane coupling agent KH-570, stirring and mixing, and filtering to obtain the modified silica.

Preferably, the reducing solution in the step (2) is prepared by mixing sodium hypophosphite and sodium hexametaphosphate in a mass ratio of 2.5: 1, adding polyvinylpyrrolidone with the mass of 0.1-0.4 times of that of sodium hypophosphite and deionized water with the mass of 5-10 times of that of the sodium hypophosphite, stirring and mixing to obtain a reducing liquid blank, and mixing the reducing liquid blank with a sulfuric acid solution with the concentration of 1mol/L according to the mass ratio of 10: 1, mixing to obtain reducing liquid.

As for optimization, the hydrophilic monomer in the step (3) is prepared by mixing polyethylene glycol (400) diacrylate and trimethylolpropane triacrylate according to a mass ratio of 1: 2, mixing to obtain a mixed monomer.

Compared with the prior art, the invention has the beneficial effects that:

the invention adds the antibacterial microspheres when preparing the high water absorption antibacterial non-woven fabric, firstly, the outer side of the antibacterial microspheres is coated with modified silicon dioxide which is a porous silicon dioxide layer, the porous silicon dioxide layer can be fixed in a network structure formed by acrylic resin and hydrophilic monomers in the ultraviolet light cross-linking process under the action of a silane coupling agent KH-570, thereby reducing the pores among the non-woven fabrics and improving the filtering effect of the product, secondly, silver nitrate can enter the pores of the porous silicon dioxide layer in the preparation process of the antibacterial microspheres and forms silver simple substances existing in the pores of the porous silicon dioxide layer under the action of a reducing agent, the antibacterial microspheres are fixed on the surface of the non-woven fabric to endow the non-woven fabric with better antibacterial performance, moreover, the interior of the antibacterial microspheres is water absorption resin, when being fixed on the surface of the non-woven fabric, the contact area between the non-woven fabric and water is increased due to the action of the hydrophilic monomer, so that the water-absorbent resin has a larger chance to contact with water, and the water absorption performance of the product is improved.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

In order to more clearly illustrate the method provided by the present invention, the following examples are given, and the method for testing each index of the freshness-retaining polylactic acid packaging bag manufactured in the following examples is as follows:

antibacterial property: the bacteriostatic ratio of the super absorbent antibacterial non-woven fabric obtained in each example to escherichia coli under the same conditions as the comparative example product was measured.

Water absorption performance: the high water absorption antibacterial non-woven fabrics obtained in the examples and the comparative products were subjected to water absorption tests according to GB/T24218, cut into circles with a diameter of 100mm, and soaked in water at room temperature for 48 hours, and then the water absorption rate was measured.