Antibacterial yarn, preparation method and antibacterial fabric

Abstract

This application relates to the field of antibacterial yarn, specifically disclosing an antibacterial yarn, a preparation method, and an antibacterial fabric. It uses wool with a fineness of 15-30 microns and bamboo fiber with a fineness of 20-30 microns as raw materials. An antibacterial metal material is first loaded onto the wool fiber, and then a chitosan membrane is coated to improve the long-term antibacterial performance of the yarn. Furthermore, the antibacterial metal material is modified with an epoxy silane coupling agent, and chitosan is crosslinked with dopamine to increase the formation of coordination bonds, chelate bonds, and chemical bonds, further enhancing the connection strength between the chitosan membrane, the antibacterial metal material, and the wool. The chitosan membrane and the antibacterial metal material are not easily detached, resulting in yarn and antibacterial fabric with good long-term antibacterial effects.

Description

Technical Field

[0001] This application relates to the field of yarn, and more specifically, to an antibacterial yarn, a method for preparing it, and an antibacterial fabric. Background Technology

[0002] Textile products are mostly worn close to the skin, making them highly susceptible to absorbing excretions from the body's sweat and splenic glands. This creates a breeding ground for microorganisms, which can not only produce odors but also lead to bacterial infections, posing a threat to human health. Furthermore, the proliferation of microorganisms in textiles can corrode the fabric, damage the fibers, reduce its physical and chemical properties, and shorten the lifespan of the clothing.

[0003] In the past, in order to improve the antibacterial properties of fabrics, antibacterial silver ions were usually blended with synthetic fibers or silver ions were linked to fibers through intermediate substances. This method is technically complex, requires a large amount of silver ions, and is costly.

[0004] Chitosan is a natural antibacterial agent mainly extracted from shrimp or crab shells. Compared with some organic antibacterial agents, it can meet people's higher requirements for clothing safety as their living standards improve. However, in current methods of applying chitosan to fabrics, there are usually problems such as poor adhesion of chitosan, which makes it easy to fall off after washing. It cannot provide long-term stable antibacterial effect for fabrics. At the same time, chitosan has poor mechanical properties and is easy to break and fall off after washing, thus losing its antibacterial effect, which further limits its application range.

[0005] The question of how to provide an antibacterial yarn, its preparation method, and an antibacterial fabric with long-term antibacterial effect, based on the above issues, is an issue that needs to be addressed. Summary of the Invention

[0006] To address the issue of long-lasting antibacterial properties in yarn, this application provides an antibacterial yarn, a preparation method thereof, and an antibacterial fabric, employing the following technical solution: In a first aspect, this application provides an antibacterial yarn, characterized in that it comprises the following raw materials in parts by weight: 40-50 parts of chitosan antibacterial wool and 10-25 parts of bamboo fiber, wherein the chitosan antibacterial wool is made by first loading antibacterial metal material onto wool fibers and then coating them with a layer of chitosan membrane.

[0007] By adopting the above solutions, wool offers comfortable wear, while bamboo fiber possesses excellent breathability and abrasion resistance, along with natural antibacterial, bacteriostatic, deodorizing, mite-repellent, and UV-resistant properties. Fabrics made by blending bamboo fiber and wool have a smooth hand feel and a cool drape. Wool fibers have scales, allowing antibacterial metallic materials to be loaded onto them. Some of the antibacterial metallic materials are deposited at the base of the scales and are not easily detached. A chitosan membrane further protects both the antibacterial metallic materials and the wool. Even after the chitosan membrane detaches and becomes ineffective, the antibacterial metallic materials still exert their antibacterial effect, resulting in yarn with good antibacterial properties and long-term antibacterial capability. The chitosan membrane also fills in the unevenness of the wool, improving its smoothness, reducing bacterial accumulation in depressions, and enhancing the yarn's long-term antibacterial performance. Bamboo fiber has a hollow structure, and the chitosan membrane has a certain elasticity. By blending chitosan antibacterial wool with bamboo fiber, the two tightly bind together, and the chitosan antibacterial wool and bamboo fiber at the contact interface will undergo slight deformation, thereby increasing the contact area and making the binding tighter. The chitosan membrane is protected between the wool and bamboo fiber and is not easy to fall off, further improving the long-term antibacterial effect of the yarn.

[0008] In one specific implementation, the fineness of the wool is 15-30 microns, and the fineness of the bamboo fiber is 20-30 microns.

[0009] By adopting the above approach, wool and bamboo fiber are tightly bound together, and antibacterial metal materials and chitosan membranes can exist stably between them without easily falling off. The resulting yarn is uniform, dense, and exhibits good long-term antibacterial performance.

[0010] In one specific implementation, the raw materials for the chitosan membrane include chitosan, acrylic acid, and a crosslinking agent, and the mass ratio of chitosan to crosslinking agent is 1:(1-1.2).

[0011] By adopting the above-mentioned methods, the chitosan membrane adheres tightly to the surface of the wool. Chitosan affects the absorption of nutrients by bacteria and can also have antibacterial effects by causing flocculation of intracellular contents and changing the cell wall to form a negatively charged environment. Acrylic acid enhances the adhesion of the chitosan membrane to the wool, further improving the antibacterial effect of the yarn. Under the action of the cross-linking agent, chitosan undergoes cross-linking and is further firmly bound to the wool fibers. By limiting the mass ratio of chitosan to cross-linking agent, the chitosan membrane is tightly bound to the wool fibers and has a certain degree of elasticity, making it less prone to cracks and damage, thus providing long-term protection for the yarn.

[0012] In one specific implementation, the crosslinking agent includes one or more of glutaraldehyde, ethylene glycol dicarboxylic acid, and glucuronic acid.

[0013] By adopting the above approach, the cross-linking agent penetrates quickly, has strong cross-linking ability, and has a good fixation effect on chitosan without destroying the antibacterial effect of chitosan.

[0014] In one specific embodiment, the raw material of the chitosan membrane also includes dopamine.

[0015] By adopting the above-mentioned approach, and through the addition of dopamine, which reacts with the amino groups of chitosan and simultaneously undergoes a self-polymerization reaction, the cross-linking structure of the chitosan membrane is adjusted. The resulting chitosan membrane has a uniform structure, low stress, and is not easily damaged. At the same time, it does not reduce the amino groups of chitosan, giving the chitosan membrane better toughness and flexibility, making it even less prone to breakage. Furthermore, the adhesion effect of chitosan to antibacterial metal surfaces is further improved through coordination and chelation bonds, further enhancing the long-lasting antibacterial effect of the yarn.

[0016] In one specific implementation, the antibacterial metallic material includes one or more of nano-silver, nano-copper, nano-zinc oxide, and nano-titanium dioxide.

[0017] By adopting the above approach, the antibacterial effect is good, the bonding effect with wool is good, and the resulting yarn has good long-lasting antibacterial properties.

[0018] In one specific implementation scheme, the antibacterial metal material is an antibacterial metal material modified with an epoxy silane coupling agent.

[0019] By adopting the above scheme, after modifying the antibacterial metal material with epoxy silane coupling agent, the compatibility between the antibacterial metal material and chitosan is better, and it is less likely to fall off. It also further improves the adhesion of the antibacterial metal material and the adhesion strength with wool and chitosan film. At the same time, due to the low shrinkage of epoxy silane coupling agent, the modified antibacterial metal material and chitosan film maintain a tight bond after subsequent treatment, and do not cause stress concentration due to defects caused by shrinkage. The antibacterial metal material and chitosan film are not easy to fall off.

[0020] Secondly, this application provides a method for preparing an antibacterial yarn, characterized in that the preparation method includes the following steps: S1: Silver-loaded wool is obtained by loading antibacterial metal materials modified with epoxy silane coupling agents onto wool through padding or magnetron sputtering. S2: Dopamine, chitosan, acrylic acid and crosslinking agent are mixed evenly to prepare chitosan mixture. The silver-loaded wool obtained in S1 is soaked in chitosan mixture, then taken out, rolled and dried to obtain chitosan silver-loaded wool. S3: Immerse the chitosan membrane wool obtained in S2 into a mixture of isohexane glycol and dipropylene glycol, adjust the pH to a weakly alkaline state, react, then remove the antibacterial wool, wash and dry it to obtain chitosan antibacterial wool. S4: Mix chitosan antibacterial wool with bamboo fiber once, comb once, then roving, spinning, winding, twisting, and steaming to obtain antibacterial yarn.

[0021] The above-mentioned method is relatively simple to prepare, with low requirements for the process and operating conditions at each stage. The resulting yarn exhibits tight cohesion, and the antibacterial metal material, wool, and chitosan membrane are closely connected. The antibacterial metal material and wool are well protected by the chitosan membrane. Simultaneously, the weakly alkaline conditions promote the cross-linking of the epoxy-silane coupling agent-modified antibacterial metal material and dopamine with chitosan, further enhancing the connection between the antibacterial metal material and chitosan. Furthermore, some dopamine groups are oxidized to quinones, which undergo Michael addition reactions with the wool surface to form covalent bonds, further strengthening the bond between the chitosan membrane and the wool. By mixing chitosan-antibacterial wool with bamboo fiber once and combing it once, the resulting yarn has a relatively straight and tightly cohesive yarn.

[0022] In one specific implementation, the reaction temperature is 80-100°C and the time is 8-12 hours.

[0023] By adopting the above approach, the reaction conditions are lower, the reaction is milder, and the cross-linking effect is better.

[0024] Thirdly, this application provides an antibacterial fabric, characterized in that: the antibacterial fabric is made from the antibacterial yarn according to any one of claims 1-8.

[0025] By adopting the above method, the antibacterial fabric produced has good antibacterial effect, is simple to prepare, does not require additional finishing, has a relatively long-lasting antibacterial effect, and the resulting fabric is relatively smooth and drapey, meeting people's needs for comfortable fabrics and long-lasting antibacterial properties.

[0026] In summary, this application has the following beneficial effects: 1. This application involves blending wool and bamboo fiber, loading antibacterial metallic materials onto the wool fibers, and coating them with a chitosan membrane. The antibacterial metallic materials and chitosan membrane are firmly loaded onto the yarn through the combination of the fine, scaly wool fibers and the hollow bamboo fiber structure. By limiting the mass ratio of chitosan to the crosslinking agent to a certain range, the chitosan membrane possesses a certain elasticity, and after crosslinking, it tightly binds with the wool and bamboo fibers, making it less prone to damage.

[0027] 2. This application modifies the antibacterial metal material by using dopamine crosslinking and epoxy silane coupling agent to crosslink the antibacterial metal material with dopamine and chitosan. The crosslinking of the epoxy silane modified antibacterial metal material with dopamine and chitosan further enhances the strength of the connection between the components. It also enables the formation of coordination bonds, chelate bonds and chemical bonds between the chitosan membrane and the antibacterial metal material, which further improves the connection stability and enhances the long-term antibacterial effect of the yarn. Detailed Implementation

[0028] The following detailed description, in conjunction with the embodiments, further illustrates this application. In Examples 1-8 and Comparative Examples 1-3, the fineness of the wool was 23 microns; in Examples 1, 3-8, and Comparative Examples 1-2, the fineness of the bamboo fiber was 20 microns; in Example 2, the fineness of the bamboo fiber was 40 microns; in Comparative Example 3, the fineness of the polyester was 20 microns; the epoxy silane coupling agent was KH-560; the amino silane coupling agent was 11-aminoundecyltrimethoxysilane from Shanghai Baishun Biotechnology Co., Ltd., catalog number H33007. Unless otherwise specified, the experimental reagents in the preparation examples, embodiments, and comparative examples were all from conventional commercially available brands or obtained through conventional preparation processes. All processes were conducted at a temperature of 25°C and a humidity of 65%.

[0029] Preparation Example Preparation Example 1 Epoxy silane coupling agent modified nano silver 100g of nano-silver was added to 2000ml of toluene and ultrasonically dispersed for 30 minutes at a power of 300W to obtain a suspension. Then, 40g of epoxy silane coupling agent was added and ultrasonically dispersed for 5 minutes at a power of 300W. The mixture was then filtered and reacted for 5 hours at a reaction temperature of 90℃. After drying at 80℃ for 6 hours, the mixture was filtered and dried at 80℃ for 6 hours to obtain epoxy silane-modified silica.

[0030] Preparation Example 2 Aminosilane coupling agent modified nano silver 100g of nano-silver and 200g of aminosilane coupling agent were added to 2000ml of 25% ethanol aqueous solution and mixed. The mixture was stirred at 80℃ for 2 hours, filtered, washed 3 times with deionized water, and dried in an oven at 100℃ to obtain aminosilane coupling agent modified nano-silver. Example

[0031] Example 1 S1: Mix 1000g butanetetracarboxylic acid, 600g sodium hypophosphite, and 4000g pure water evenly, then add 500g nano silver to prepare a nano silver mixture. Then immerse 400g wool in the mixture at a temperature of 60℃ for 30 minutes. After immersion, dry at 60℃, wash with pure water, dehydrate, and dry at 30℃. Repeat the above steps once to obtain silver-loaded wool. S2: Add 10g of acetic acid to 2500g of pure water and stir well. Then add 500g of chitosan and drop in 5000ml of 5wt% ammonium persulfate solution. After reacting for 10 minutes, add 500ml of acrylic acid and stir well. Then add 500ml of glutaraldehyde and stir well to obtain a chitosan mixture. Soak the silver-loaded wool obtained in S1 in the chitosan mixture, then take it out and roll it and dry it at 60℃ for 3 hours to obtain chitosan-loaded silver wool. S3: Chitosan-loaded silver wool is mixed with bamboo fiber once, combed once, then roving, spinning, winding, twisting, and steaming at 80℃ for 10 hours to obtain antibacterial yarn.

[0032] Example 2 The only difference between this embodiment and Embodiment 1 is that the fineness of the bamboo fiber is 40 microns.

[0033] Example 3 S1: Mix 1000g butanetetracarboxylic acid, 600g sodium hypophosphite, and 4000g pure water evenly, then add 500g nano silver to prepare a nano silver mixture. Then immerse 400g wool in the mixture at a temperature of 60℃ for 30 minutes. After immersion, dry at 60℃, wash with pure water, dehydrate, and dry at 30℃. Repeat the above steps once to obtain silver-loaded wool. S2: Add 10g of acetic acid to 2500g of pure water and stir well. Then add 500g of chitosan and drop in 5000ml of 5wt% ammonium persulfate solution. After reacting for 10 minutes, add 500ml of acrylic acid and stir well. Then add 700ml of glutaraldehyde and stir well to obtain a chitosan mixture. Soak the silver-loaded wool obtained in S1 in the chitosan mixture, then take it out and roll it and dry it at 60℃ for 3 hours to obtain chitosan silver-loaded wool. S3: Chitosan-loaded silver wool is mixed with bamboo fiber once, combed once, then roving, spinning, winding, twisting, and steaming at 80℃ for 10 hours to obtain antibacterial yarn.

[0034] Example 4 S1: Mix 1000g butanetetracarboxylic acid, 600g sodium hypophosphite, and 4000g pure water evenly, then add 500g nano silver to prepare a nano silver mixture. Then immerse 400g wool in the mixture at a temperature of 60℃ for 30 minutes. After immersion, dry at 60℃, wash with pure water, dehydrate, and dry at 30℃. Repeat the above steps once to obtain silver-loaded wool. S2: Add 10g of acetic acid to 2500g of pure water and stir well. Then add 500g of chitosan and drop in 5000ml of 5wt% ammonium persulfate solution. After reacting for 10 minutes, add 500ml of acrylic acid and stir well. Then add 400ml of glutaraldehyde and stir well to obtain a chitosan mixture. Soak the silver-loaded wool obtained in S1 in the chitosan mixture, then take it out and roll it and dry it at 60℃ for 3 hours to obtain chitosan silver-loaded wool. S3: Chitosan-loaded silver wool is mixed with bamboo fiber once, combed once, then roving, spinning, winding, twisting, and steaming at 80℃ for 10 hours to obtain antibacterial yarn.

[0035] Example 5 S1: Mix 1000g butanetetracarboxylic acid, 600g sodium hypophosphite, and 4000g pure water evenly, then add 500g nano silver to prepare a nano silver mixture. Then immerse 400g wool in the mixture at a temperature of 60℃ for 30 minutes. After immersion, dry at 60℃, wash with pure water, dehydrate, and dry at 30℃. Repeat the above steps once to obtain silver-loaded wool. S2: Add 10g of acetic acid to 2500g of pure water and stir evenly. Then add 500g of chitosan and drop in 5000ml of 5wt% ammonium persulfate solution. After reacting for 10 minutes, add 500ml of acrylic acid and stir evenly. Then add 500ml of glutaraldehyde and stir evenly to obtain a chitosan mixture. Soak the silver-loaded wool obtained in S1 in the chitosan mixture and then take it out and roll it to obtain rolled wool. Mix 50g of dopamine and 1000ml of tris(hydroxymethyl)aminomethane hydrochloride (TRIS-HCl) evenly to obtain a dopamine mixture. Then soak the rolled wool in the mixture and take it out. Dry the wool at 60℃ for 3 hours to obtain chitosan-loaded silver wool. S3: Immerse the chitosan-loaded silver wool obtained in S2 into a mixture of isohexanediol and dipropylene glycol in a mass ratio of 1:1, adjust the pH to 7.5, react, then remove the chitosan-loaded silver wool, dry it at 60℃, and obtain chitosan antibacterial wool. S4: Mix chitosan antibacterial wool with bamboo fiber once, comb once, then roving, spinning, winding, twisting, and steaming to obtain antibacterial yarn.

[0036] Example 6 S1: 1000g butanetetracarboxylic acid, 600g sodium hypophosphite, and 4000g pure water are mixed evenly. Then, 500g of nano-silver modified with epoxy silane coupling agent prepared in Example 1 is added to prepare a nano-silver mixture. Then, 400g of wool is immersed in the mixture at a temperature of 60°C for 30 minutes. After immersion, it is dried at 60°C, washed with pure water, dehydrated, and dried at 30°C. The above steps are repeated once to obtain silver-loaded wool. S2: Add 10g of acetic acid to 2500g of pure water and stir well. Then add 500g of chitosan and drop in 5000ml of 5wt% ammonium persulfate solution. After reacting for 10 minutes, add 500ml of acrylic acid and stir well. Then add 500ml of glutaraldehyde and stir well to obtain a chitosan mixture. Soak the silver-loaded wool obtained in S1 in the chitosan mixture, then take it out and roll it and dry it at 60℃ for 3 hours to obtain chitosan-loaded silver wool. S3: Chitosan-loaded silver wool is mixed with bamboo fiber once, combed once, then roving, spinning, winding, twisting, and steaming at 80℃ for 10 hours to obtain antibacterial yarn.

[0037] Example 7 S1: 1000g of butanetetracarboxylic acid, 600g of sodium hypophosphite, and 4000g of pure water were mixed evenly. Then, 500g of the aminosilane coupling agent-modified nano-silver prepared in Example 2 was added to obtain a nano-silver mixture. 400g of wool was then immersed in the mixture at 60°C for 30 minutes. After immersion, the wool was dried at 60°C, washed with pure water, dehydrated, and dried at 30°C. Then repeat the above steps once to obtain silver-loaded wool; S2: Add 10g of acetic acid to 2500g of pure water and stir well. Then add 500g of chitosan and drop in 5000ml of 5wt% ammonium persulfate solution. After reacting for 10 minutes, add 500ml of acrylic acid and stir well. Then add 500ml of glutaraldehyde and stir well to obtain a chitosan mixture. Soak the silver-loaded wool obtained in S1 in the chitosan mixture, then take it out and roll it and dry it at 60℃ for 3 hours to obtain chitosan-loaded silver wool. S3: Chitosan-loaded silver wool is mixed with bamboo fiber once, combed once, then roving, spinning, winding, twisting, and steaming at 80℃ for 10 hours to obtain antibacterial yarn.

[0038] Example 8 S1: 1000g butanetetracarboxylic acid, 600g sodium hypophosphite, and 4000g pure water are mixed evenly. Then, 500g of nano-silver modified with epoxy silane coupling agent prepared in Example 1 is added to prepare a nano-silver mixture. Then, 400g of wool is immersed in the mixture at a temperature of 60°C for 30 minutes. After immersion, it is dried at 60°C, washed with pure water, dehydrated, and dried at 30°C. The above steps are repeated once to obtain silver-loaded wool. S2: Add 10g of acetic acid to 2500g of pure water and stir evenly. Then add 500g of chitosan and drop in 5000ml of 5wt% ammonium persulfate solution. After reacting for 10 minutes, add 500ml of acrylic acid and stir evenly. Then add 500ml of glutaraldehyde and stir evenly to obtain a chitosan mixture. Soak the silver-loaded wool obtained in S1 in the chitosan mixture and then take it out and roll it to obtain rolled wool. Mix 50g of dopamine and 1000ml of tris(hydroxymethyl)aminomethane hydrochloride (TRIS-HCl) evenly to obtain a dopamine mixture. Then soak the rolled wool in the mixture and take it out. Dry the wool at 60℃ for 3 hours to obtain chitosan-loaded silver wool. S3: The chitosan-loaded silver wool obtained in S2 was immersed in a mixture of isohexyl glycol and dipropylene glycol, and the pH was adjusted to 7.5. The reaction was carried out, and then the antibacterial wool was taken out, washed with pure water, and dried at 60°C to obtain chitosan antibacterial wool. S4: Chitosan antibacterial wool is mixed with bamboo fiber once, combed once, then roving, spinning, winding, twisting, and steaming at 80℃ for 10 hours to obtain antibacterial yarn.

[0039] Comparative Example Comparative Example 1 S1: Mix 1000g butanetetracarboxylic acid, 600g sodium hypophosphite, and 4000g pure water evenly, then add 500g nano silver to prepare a nano silver mixture. Then immerse 400g wool in the mixture at a temperature of 60℃ for 30 minutes. After immersion, dry at 60℃, wash with pure water, dehydrate, and dry at 30℃. Repeat the above steps once to obtain silver-loaded wool. S2: Mix silver-loaded wool with bamboo fiber once, comb once, then roving, spinning, winding, twisting, and steaming at 80℃ for 10 hours to obtain antibacterial yarn.

[0040] Comparative Example 2 S1: Add 10g of acetic acid to 2500g of pure water and stir well. Then add 500g of chitosan and drop in 5000ml of 5wt% ammonium persulfate solution. After reacting for 10 minutes, add 500ml of acrylic acid and stir well. Then add 500ml of glutaraldehyde and stir well to obtain a chitosan mixture. Soak the silver-loaded wool obtained in S1 in the chitosan mixture, then take it out and roll it and dry it at 60℃ for 3 hours to obtain chitosan wool. S2: Chitosan wool and bamboo fiber are mixed once, combed once, then roving, spinning, winding, twisting, and steaming at 80℃ for 10 hours to obtain antibacterial yarn.

[0041] Comparative Example 3 S1: Mix 1000g butanetetracarboxylic acid, 600g sodium hypophosphite, and 4000g pure water evenly, then add 500g nano silver to prepare a nano silver mixture. Then immerse 400g wool in the mixture at a temperature of 60℃ for 30 minutes. After immersion, dry at 60℃, wash with pure water, dehydrate, and dry at 30℃. Repeat the above steps once to obtain silver-loaded wool. S2: Add 10g of acetic acid to 2500g of pure water and stir well. Then add 500g of chitosan and drop in 5000ml of 5wt% ammonium persulfate solution. After reacting for 10 minutes, add 500ml of acrylic acid and stir well. Then add 500ml of glutaraldehyde and stir well to obtain a chitosan mixture. Soak the silver-loaded wool obtained in S1 in the chitosan mixture, then take it out and roll it and dry it at 60℃ for 3 hours to obtain chitosan-loaded silver wool. S3: Chitosan-loaded silver wool is mixed with polyester once, combed once, then roving, spinning, winding, twisting, and steaming at 80℃ for 10 hours to obtain antibacterial yarn.

[0042] Performance testing test 1: The antibacterial yarns prepared in the examples and comparative examples were ring-spun into antibacterial fabrics. Then, the antibacterial fabrics were tested according to standard AATCC-100-2012 "Evaluation Methods for Antibacterial Textiles" to obtain the antibacterial rate. The test strain was Staphylococcus aureus, and the incubation time was 24 hours. The test results are shown in Table 1.

[0043] Test 2: The antibacterial yarns prepared in the examples and comparative examples were ring-spun into antibacterial fabrics, then hand-washed in 35°C water for 2 minutes and wrung dry. This washing process was repeated 30 times. The antibacterial rate after washing was then tested according to standard AATCC-100-2012, "Evaluation Methods for Antibacterial Textiles," using Staphylococcus aureus as the test strain and incubation time of 24 hours. The test results are shown in Table 1.

[0044] Table 1 As can be seen from Examples 1-2 and Comparative Examples 1-3 and Table 1, the antibacterial fabric of this application has good long-lasting antibacterial properties.

[0045] As can be seen from Examples 1, 3-4 and Table 1, this application achieves better long-lasting antibacterial properties in antibacterial fabrics by controlling the crosslinking agent within a certain range.

[0046] As can be seen from Examples 1, 5, and 8 and Table 1, the antibacterial fabric prepared by adding a certain amount of dopamine to the chitosan membrane and crosslinking it has better long-lasting antibacterial properties.

[0047] As can be seen from Examples 1, 6-8 and Table 1, this application improves the long-lasting antibacterial properties of the antibacterial fabric by modifying the antibacterial metal material with an epoxy silane coupling agent.

[0048] This specific embodiment is merely an explanation of this application and is not intended to limit it. After reading this specification, those skilled in the art can make modifications to this embodiment without contributing any inventive step, but such modifications are protected by patent law as long as they fall within the scope of the claims of this application.

Claims

1. An antibacterial yarn, characterized in that: The raw materials include the following parts by weight: 40-50 parts of chitosan antibacterial wool and 10-25 parts of bamboo fiber. The chitosan antibacterial wool is made by first loading antibacterial metal materials onto wool fibers and then coating them with a chitosan membrane. The raw materials of the chitosan membrane include chitosan, acrylic acid and crosslinking agent, and the mass ratio of chitosan to crosslinking agent is 1:(1-1.2). The antibacterial metal material is modified with an epoxy silane coupling agent; The fineness of the wool fiber is 15-30 mic, and the fineness of the bamboo fiber is 20-30 mic; The crosslinking agent includes one or more of glutaraldehyde, ethylene glycol dicarboxylic acid, and glucuronic acid; the raw material of the chitosan membrane also includes dopamine. The antibacterial yarn comprises the following preparation steps: S1: Antibacterial metal material modified with epoxy silane coupling agent is loaded onto wool by padding or magnetron sputtering to obtain silver-loaded wool; S2: Dopamine, chitosan, acrylic acid, ammonium persulfate and crosslinking agent are mixed evenly to prepare chitosan mixture, the silver-loaded wool obtained in S1 is immersed in chitosan mixture, and then taken out for padding and drying to obtain chitosan silver-loaded wool; S3: The chitosan silver-loaded wool obtained in S2 is immersed in a mixture of isohexyl glycol and dipropylene glycol, the pH is adjusted to weakly alkaline, the reaction is carried out, and then the antibacterial wool is taken out, washed and dried to obtain chitosan antibacterial wool.

2. The antibacterial yarn according to claim 1, characterized in that: The antibacterial metallic material includes nano-silver.

3. An antibacterial fabric, characterized in that: The antibacterial fabric is made from the antibacterial yarn as described in any one of claims 1-2.

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