An antiviral fabric and its preparation method

Abstract

This application discloses an antiviral fabric and its preparation method. The antiviral fabric comprises a fabric substrate of 90%-95% by weight and a finishing agent of 5%-10% by weight. The finishing agent comprises the following raw materials in the following weight ratios: 7-10 parts of protein containing cysteine ​​and / or methionine; 0.5-2 parts of nano-silver; and 14-20 parts of an epoxy-containing aqueous adhesive. The antiviral coating on the surface of the antiviral fabric prepared by this application is not easily peeled off, effectively improving the durability of the fabric's antiviral effect.

Description

Technical Field

[0001] This application relates to the field of antiviral fabrics, and in particular to an antiviral fabric and its preparation method. Background Technology

[0002] Fabrics such as clothing and bedding, which come into close contact with the skin for extended periods, can easily become vectors for viruses, significantly increasing the likelihood of infection. Treating fabrics with antiviral agents during the manufacturing process can effectively enhance their antibacterial and antiviral properties.

[0003] Antiviral treatment of fabrics generally follows two approaches. The first is to use new materials with inherent antiviral capabilities, such as graphene and copper ion fibers. However, this method is difficult to process, costly, and limited to specific fabric fibers. The second approach involves using antiviral materials as finishing agents to treat the fabric. This method is widely used due to its simplicity, mature technology, and outstanding results. The use of antiviral finishing agents also falls into two categories: one is fiber finishing, where antiviral finishing agents are added during the spinning process to create antiviral fibers, which are then used to make antiviral fabrics. The other is to directly apply antiviral finishing agents to the spun fabric for post-processing. Post-processing is simpler and less limited; approximately 70% of current antiviral fabrics are made using this method. However, post-processing also has drawbacks, such as the antiviral coating on the garment surface easily peeling off and poor antiviral durability. Summary of the Invention

[0004] To address the issue of the antiviral layer on the surface of antiviral fabrics obtained through post-treatment methods easily peeling off, To address the issue of poor virus durability, this application provides an antiviral fabric and its preparation method.

[0005] Firstly, this application provides an antiviral fabric, comprising 90%-95% by weight of Fabric substrate and 5%-10% finishing agent; the finishing agent comprises the following raw materials in parts by weight: 7-10 portions of protein containing cysteine ​​and / or methionine; Nano silver 0.5-2 parts; 14-20 parts of epoxy-containing waterborne adhesive.

[0006] By employing the above technical solution, nano-silver, being a nanomaterial with excellent antiviral effects, and proteins containing cysteine ​​and / or methionine, which are rich in active amino and thiol groups, can undergo a complexation reaction with nano-silver through the thiol groups, thus chelating and connecting with the nano-silver. The water-based adhesive used contains epoxy groups, which can also react with the amino groups in the protein, resulting in a stronger chemical structure when the two are combined. Furthermore, the water-based adhesive contains numerous active groups, enabling it to form a strong bond with the fabric, thereby achieving a firm adhesion of the antiviral coating obtained after finishing and solving the problem of poor antiviral durability.

[0007] In summary, proteins, through their abundant amino and thiol groups, tightly bind nano-silver to epoxy-containing adhesives, resulting in stronger adsorption of the nano-silver, as an antiviral material, within the finishing agent, making it less prone to detachment. Simultaneously, the epoxy-containing adhesives also ensure a strong bond between the finishing agent and the fabric.

[0008] Preferably, the particle size of the silver nanoparticles is 10-200 nm; more preferably, the particle size of the silver nanoparticles is 10-25 nm.

[0009] By adopting the above technical solution, nano-silver with the above particle size has a better killing effect on viruses.

[0010] Preferably, proteins containing cysteine ​​and / or methionine include at least one of metallothionein and whey protein.

[0011] By adopting the above technical solution, metallothionein molecules contain 61 amino acids, 20 of which are cysteine, and are rich in sulfhydryl groups, making them a low molecular weight protein with a high sulfhydryl content; whey protein contains a large amount of methionine and is also rich in sulfhydryl groups. Both metallothionein and whey protein can bind a large number of heavy metal ions and form better chemical bonds with nano-silver, which is beneficial to improving the durability of antiviral fabrics.

[0012] Preferably, the epoxy-containing adhesive is an epoxy acrylate polymer emulsion.

[0013] By employing the above-mentioned technical solutions, acrylate polymers or their emulsions are important raw materials in fabric adhesives, exhibiting excellent adhesion to fabrics. Furthermore, epoxy acrylate polymers contain epoxy groups, which, while providing excellent adhesion to fabrics, can also form bonds with amino groups in proteins, exhibiting superior adhesion to protein-containing substances and thus preventing the antiviral finishing layer from peeling off.

[0014] Preferably, when a waterborne epoxy acrylate polymer emulsion is used as a waterborne adhesive, the finishing agent also includes 20%-30% by weight of waterborne polyurethane containing epoxy groups in the waterborne adhesive.

[0015] The poor flexibility of cured epoxy acrylate polymers, achieved through the aforementioned technical solutions, leads to reduced softness and comfort in antiviral fabrics. Waterborne polyurethane can modify epoxy acrylate polymers, increasing the flexibility of the adhesive after curing. Polyurethane possesses advantages such as excellent adhesion, easily controllable structure, and excellent chain segment flexibility. Adding an appropriate amount of polyurethane can introduce polyurethane segments into the main chain of the epoxy acrylate polymer, effectively improving its flexibility and enhancing the softness and comfort of the antiviral fabric. Furthermore, polyurethane can also serve as a carrier for nano-silver, enabling finishing agents containing modified epoxy acrylate polymers to have a stronger ability to bind nano-silver, thus contributing to improved durability of antiviral fabrics.

[0016] Preferably, the preparation of the emulsion containing epoxy acrylate polymer includes the following steps: mixing acrylic acid, methyl methacrylate and butyl acrylate evenly to prepare a pre-reactant, then heating the liquid epoxy resin to 60-90°C, adding the pre-reactant, emulsifier, initiator and deionized water, keeping the reaction at the temperature for 1-2 hours, and then cooling to obtain the epoxy acrylate polymer emulsion.

[0017] By adopting the above technical solution, the liquid epoxy resin is heated to an appropriate temperature and blended with monomers such as acrylic acid, methyl methacrylate, and butyl acrylate to undergo an emulsion polymerization reaction, generating an epoxy acrylate polymer.

[0018] More preferably, in the step of preparing the epoxy-containing acrylate polymer emulsion, the pre-reactant is added in stages: when the temperature reaches 60-75°C, 40-50 wt% of the pre-reactant is added; when the temperature reaches 80-90°C, the remaining pre-reactant is added dropwise over a period of 2-2.5 hours.

[0019] By adopting the above technical solution, the reaction of epoxy resin can be made more complete, which helps to increase the content of epoxy groups in the polymer, thereby promoting the adhesion between the antiviral coating and the fabric, and reducing the probability of peeling and falling off.

[0020] Preferably, the epoxy value of the epoxy resin is 0.5-0.6 mol / 100g; the mass ratio of the epoxy resin to acrylic acid, methyl methacrylate and butyl acrylate is (10-50):(1-10):(10-50):(10-50).

[0021] By adopting the above technical solution, it is possible to ensure that the generated epoxy acrylate polymer emulsion contains sufficient epoxy groups while maintaining sufficient adhesion to the fabric. If the epoxy value of the epoxy resin is too low, the epoxy groups in the generated epoxy acrylate emulsion will be insufficient, resulting in a weak bond between the epoxy resin and the amino groups in the protein. Conversely, if the epoxy value of the epoxy resin is too high, the adhesion of the epoxy acrylate polymer itself will decrease, weakening its bonding ability with the fabric surface.

[0022] More preferably, in the step of preparing the epoxy-containing acrylate polymer emulsion, the weight parts of epoxy resin, acrylic acid, methyl methacrylate, butyl acrylate, emulsifier, deionized water and initiator are: 10-30 parts epoxy resin; 1-5 parts acrylic acid; 15-30 parts of methyl methacrylate; 15-30 parts of butyl acrylate; Emulsifier 0.5-2 parts; Initiator 0.5-2 parts; 45-55 parts deionized water.

[0023] Secondly, this application provides an antiviral fabric, wherein the preparation method of the finishing agent includes the following steps: S201. Mix nano-silver with a protein containing cysteine ​​and / or methionine to make nano-silver... Silver reacts with thiol groups on proteins containing cysteine ​​and / or methionine to form a complex. S202. An epoxy-containing adhesive is added to the composite, reacted, and then an aqueous solution is added. Polyurethane is mixed evenly to obtain a finishing agent.

[0024] By employing the above technical solution, nano-silver is first mixed with protein to produce a reaction, causing the nano-silver to undergo a complexation reaction with the sulfhydryl groups in the protein containing cysteine ​​and / or methionine, thus tightly chelating the two together. Next, an epoxy-containing aqueous adhesive is added to the protein-nano-silver complex. The epoxy groups in the adhesive react and bond with the amino groups in the protein, forming a strong bond between the two. This results in a tightly connected final finishing agent. Simultaneously, the numerous active groups in the aqueous adhesive prevent the finishing agent from easily detaching from the fabric surface, exhibiting excellent antiviral durability. Furthermore, the modification of the epoxy acrylate polymer by the waterborne polyurethane enhances the fabric's softness.

[0025] When the epoxy-containing waterborne adhesive does not use an epoxy acrylate polymer emulsion, such as a water-emulsion epoxy adhesive, waterborne polyurethane is not added in step S202.

[0026] Preferably, in step S201, the nano-silver is mixed with the protein containing cysteine ​​and / or methionine for 40-100 minutes, and then heated to 60-80°C.

[0027] By adopting the above technical solution, nano-silver exhibits higher binding force after reacting with proteins containing cysteine ​​and / or methionine.

[0028] Preferably, in step S202, when adding the epoxy-containing adhesive to the composite, 2%-5% of the mass of the epoxy-containing aqueous adhesive containing an active hydrogen structural substance is added; the active hydrogen structural substance includes organic acids, phenolic chemicals, and alcohol chemicals.

[0029] Typically, but not limitingly, the organic acid is a carboxylic acid.

[0030] Typically, but not limitingly, the phenolic chemical is phenol.

[0031] Typically, but not limitingly, the alcohol chemical is ethanol.

[0032] By adopting the above technical solution, the structure of active hydrogen can accelerate the ring-opening reaction between amino groups and epoxy groups. Under this environment, one amino group is more likely to react with two epoxy groups to generate two hydroxyl groups, so that one amino group is connected to two epoxy groups after the reaction. The structure between amino and epoxy groups is more robust, and at the same time, the epoxy-containing adhesives and proteins are more tightly connected.

[0033] Preferably, the method for preparing an antiviral fabric provided in this application includes the following steps: applying the finishing agent to the fabric by any one of padding, impregnation, spraying, coating, or brushing, and then drying and setting the fabric to obtain the antiviral fabric.

[0034] The preferred drying and shaping temperatures are 70-80℃ and 90-100℃, respectively.

[0035] By adopting the above technical solution, finishing agents can be added to the surface of the fabric to achieve the antiviral function of the fabric.

[0036] Preferably, when the finishing agent is applied to the fabric surface, the temperature of the finishing agent is maintained at 40-60℃.

[0037] In summary, this application has the following beneficial effects: 1. In this application, a protein containing cysteine ​​and / or methionine is used to tightly bond the nano-silver in the finishing agent and the epoxy-containing adhesive. The thiol groups in the protein containing cysteine ​​and / or methionine bind the nano-silver, and the amino groups bind the epoxy groups in the adhesive, making the nano-silver, as an antiviral material, less prone to detachment and reducing the probability of peeling off the antiviral coating.

[0038] 2. This application preferably uses epoxy acrylate polymer emulsion as an adhesive. On the one hand, it can connect the epoxy groups and the nano silver protein complex, making the nano silver protein complex less likely to fall off. On the other hand, epoxy acrylate also has a very obvious adhesive effect on the fabric, which is beneficial to improving the durability of the fabric's antiviral performance.

[0039] 3. This application preferably uses polyurethane to modify the epoxy acrylate polymer. Polyurethane itself has good flexibility. After adding the main chain of the epoxy acrylate polymer, the flexibility of the epoxy acrylate polymer is improved, thus enhancing the comfort of the fabric. Detailed Implementation

[0040] The present application will be further described in detail below with reference to the embodiments.

[0041] In the embodiments of this application, epoxy resin 618 (E51) is used, with an epoxy value of 0.51-0.54 mol / 100g.

[0042] The waterborne polyurethane was selected as AH-K100-1 from Anhui Huatai.

[0043] Preparation examples of raw materials and / or intermediates Preparation Example 1: An epoxy-containing aqueous adhesive was prepared according to the following steps: 200g of epoxy resin 618 (E51) was placed in a four-necked flask. When the temperature was raised to 68°C, a mixture of 15g acrylic acid, 110g methyl methacrylate, 110g butyl acrylate, 10g propylene glycol, 500g deionized water, and 10g benzoyl peroxide were added. The reactants were then heated to 85°C. A mixture of 15g acrylic acid, 110g methyl methacrylate, and 110g butyl acrylate was added dropwise to the reactants over a period of 2.5 hours. The mixture was then kept at this temperature for 2 hours. After cooling, an epoxy acrylate polymer emulsion was obtained.

[0044] Preparation Example 2: An epoxy-containing aqueous adhesive was prepared according to the following steps: 200g of epoxy resin 618 (E51) was placed in a four-necked flask. When the temperature was raised to 70°C, a mixture of 25g acrylic acid, 90g methyl methacrylate, 90g butyl acrylate, 10g propylene glycol, 500g deionized water, and 10g benzoyl peroxide were added. The reactants were then heated to 85°C. The mixture of 25g acrylic acid, 90g methyl methacrylate, and 90g butyl acrylate was added dropwise to the reactants over a period of 2.5 hours. The mixture was then kept at this temperature for 2 hours. After cooling, an epoxy acrylate polymer emulsion was obtained.

[0045] Preparation Example 3: An epoxy-containing aqueous adhesive was prepared according to the following steps: 200g of epoxy resin 618 (E51) was placed in a four-necked flask. When the temperature was raised to 65°C, a mixture of 10g acrylic acid, 120g methyl methacrylate, 120g butyl acrylate, 10g propylene glycol, 500g deionized water, and 10g benzoyl peroxide were added. The reactants were then heated to 85°C. The mixture of 10g acrylic acid, 120g methyl methacrylate, and 120g butyl acrylate was added dropwise to the reactants over a period of 2.5 hours. The mixture was then kept at this temperature for 2 hours. After cooling, an epoxy acrylate polymer emulsion was obtained.

[0046] Preparation Example 4: An epoxy-containing aqueous adhesive was prepared according to the following steps: 200g of epoxy resin 618 (E51) was placed in a four-necked flask, and a mixture including 30g of acrylic acid, 220g of methyl methacrylate, 220g of butyl acrylate, 10g of propylene glycol, 500g of deionized water, and 10g of benzoyl peroxide was added. The mixture was heated to 85°C and kept at that temperature for 2 hours. After cooling, an epoxy acrylate polymer emulsion was obtained.

[0047] Preparation Example 5: An epoxy-containing aqueous adhesive was prepared according to the following steps: 15g of acrylic acid, 110g of methyl methacrylate, 110g of butyl acrylate, and 200g of glycidyl methacrylate were mixed at 68°C. The reactants were then heated to 85°C, and a mixture of 15g of acrylic acid, 110g of methyl methacrylate, and 110g of butyl acrylate was added dropwise to the reactants over a period of 2.5 hours. The mixture was then kept at this temperature for 2 hours. After cooling, an acrylic polymer emulsion was obtained.

[0048] Preparation Example 6: An epoxy-free adhesive was prepared according to the following steps: A mixture of 15g acrylic acid, 110g methyl methacrylate, and 110g butyl acrylate, along with 10g propylene glycol, 500g deionized water, and 10g benzoyl peroxide, was mixed at 68°C. The reactants were then heated to 85°C, and a mixture of 15g acrylic acid, 110g methyl methacrylate, and 110g butyl acrylate was added dropwise to the reactants over a period of 2.5 hours. The mixture was then kept at this temperature for 2 hours, and after cooling, an acrylic polymer emulsion was obtained. Example

[0049] Example 1: An antiviral fabric was prepared according to the following steps: S201. Mix 100g of silver nanoparticles with a D50 particle size of 10nm and 900g of metallothionein (Yingxin Laboratory TX00891). After mixing evenly, heat to 70℃ to allow the silver nanoparticles with a D50 particle size of 10nm to undergo a complexation reaction with the thiol groups on the metallothionein. The reaction time is 70 minutes. After the reaction is complete, a complex is obtained. S202. Add 1700g of the epoxy acrylate polymer emulsion prepared in Preparation Example 1 to the composite, then add 425g of waterborne polyurethane, stir evenly, and obtain the finishing agent. S203. The finishing agent is applied to the fabric by impregnation. During the impregnation process, the temperature of the finishing agent is maintained at 50°C. Then, the fabric is dried and set to obtain the finished product. The drying and setting temperatures are 75°C and 90°C, respectively.

[0050] Example 2: An antiviral fabric was prepared according to the following steps: S201. Mix 50g of silver nanoparticles with a D50 particle size of 10nm and 1000g of metallothionein (Yingxin Laboratory TX00891). After mixing evenly, heat to 70℃ to allow the silver nanoparticles with a D50 particle size of 10nm to undergo a complexation reaction with the thiol groups on the metallothionein. The reaction time is 70 minutes. After the reaction is complete, a complex is obtained. S202. Add 1800g of the epoxy acrylate polymer emulsion prepared in Preparation Example 2 to the composite, then add 450g of waterborne polyurethane, and stir until homogeneous to obtain the finishing agent.

[0051] S203. The finishing agent is applied to the fabric by impregnation, the temperature of the finishing agent is maintained at 50°C, and then dried and set to obtain the finished product, with drying and setting temperatures of 75°C and 90°C, respectively.

[0052] Example 3: An antiviral fabric was prepared according to the following steps: S201. Mix 80g of silver nanoparticles with a D50 particle size of 10nm and 700g of whey protein (Jizhi reagent W96141). After mixing evenly, heat to 70℃ to allow the silver nanoparticles with a D50 particle size of 10nm to undergo a complexation reaction with the thiol groups on the metallothionein. The reaction time is 70 minutes. After the reaction is complete, a complex is obtained. S202. Add 1600g of the epoxy acrylate polymer emulsion prepared in Preparation Example 3 to the composite, then add 400g of waterborne polyurethane, and stir evenly to obtain the finishing agent. S203. The finishing agent is applied to the fabric by impregnation, the temperature of the finishing agent is maintained at 50°C, and then dried and set to obtain the finished product, with drying and setting temperatures of 75°C and 90°C, respectively.

[0053] Table 1. Raw material ratios (g) for Examples 1-3 Example 4, an antiviral fabric, differs from Example 1 in that, in step S201, an equal amount of nano-silver with a D50 particle size of 200nm is used instead of nano-silver with a D50 particle size of 10nm.

[0054] Example 5, an antiviral fabric, differs from Example 1 in that, in step S202, an equal amount of the epoxy-containing aqueous adhesive prepared in Example 5 is used instead of the epoxy acrylate polymer emulsion prepared in Example 1.

[0055] Example 6, an antiviral fabric, differs from Example 1 in that, in step S202, the epoxy acrylate polymer emulsion prepared in Example 1 is replaced by Preparation Example 4.

[0056] Example 7, an antiviral fabric, differs from Example 1 in that, in step S202, waterborne polyurethane is not added; instead, the epoxy acrylate polymer emulsion obtained in Preparation Example 1 is directly added to the composite obtained in step S201 and stirred evenly to obtain a finishing agent.

[0057] Example 8, an antiviral fabric, differs from Example 1 in that 40g of glacial acetic acid is added in step S202.

[0058] Example 9, an antiviral fabric, differs from Example 1 in that 40g of phenol is added in step S202.

[0059] Comparative Example Comparative Example 1, a method for preparing an antiviral fabric, differs from Example 1 in that an equal amount of globulin (Gizhi reagent V73510) is used to replace metallothionein in step S201, and globulin contains almost no thiol groups.

[0060] Comparative Example 2, a method for preparing an antiviral fabric, differs from Example 1 in that, in step S202, an equal amount of the acrylate polymer emulsion obtained in Preparation Example 6 is used instead of the epoxy acrylate polymer emulsion obtained in Preparation Example 1.

[0061] Performance testing Experiment 1: Virus Inactivation Rate Test of Antiviral Fabrics Test Method: The antiviral performance of the fabrics was tested according to the specifications in ISO 18184—2019 "Textiles – Tests for antiviral activity", using the TCID50 method. Influenza A virus H3N2 MDCK cells were used for detection. After the initial test, the samples were washed 50 times with water and then tested again using the same method. The test results are shown in Table 2.

[0062] Experiment 2: Softness Test. Test method: The test was conducted according to the provisions of Q / 320691KDA56-2020 "Detection and Evaluation of Softness Quality of Textiles". The test results are shown in Table 1.

[0063] Table 2. Test results of antiviral activity and softness of antiviral fabrics Example 1 99.28％ 94.21％ 84.59 Example 2 99.11％ 95.06％ 86.13 Example 3 99.15％ 94.04％ 82.32 Example 4 98.18％ 95.11％ 83.87 Example 5 99.29％ 93.18％ 84.52 Example 6 99.32％ 93.27％ 84.18 Example 7 99.30％ 93.24％ 71.43 Example 8 99.22％ 94.16％ 85.08 Example 9 99.21％ 95.15％ 84.98 Comparative Example 1 99.22％ 78.49％ 84.07 Comparative Example 2 99.19％ 80.26％ 84.23 Analysis of experimental results: 1. As can be seen from Examples 1-9 and Comparative Examples 1-2, and in conjunction with Table 2, this application overcomes the problems of easy detachment and poor durability of nano-silver in post-treatment processes by adding proteins containing cysteine ​​and / or methionine and aqueous adhesives containing epoxy groups. This may be because nano-silver undergoes a complexation reaction with the sulfhydryl groups in proteins containing cysteine ​​and / or methionine, chelating together. The proteins are then bound together through amino and epoxy groups. Finally, the epoxy-containing adhesive connects to the fabric surface through abundant active groups, resulting in a very strong bonding structure.

[0064] 2. As can be seen from Examples 1 and 4 and Table 2, this application enhances the virus-killing effect by using smaller-sized silver nanoparticles instead of larger-sized ones. This is likely because smaller-sized silver nanoparticles have a larger surface area and stronger activity, thus possessing a stronger ability to kill viruses.

[0065] 3. As can be seen from Examples 1-3 and Example 6, and in conjunction with Table 2, this application, by adding a mixture including acrylic acid, methyl methacrylate, and butyl acrylate in steps during the preparation of the epoxy acrylate polymer emulsion, makes the finishing agent less prone to detachment. This may be because the stepwise addition of the mixture results in a more complete reaction of the epoxy acrylate polymer emulsion, stronger epoxy group-to-amino group linkage, and a more stable internal structure.

[0066] 4. As can be seen from Examples 1 and 7 and Table 2, this application effectively improves the softness and comfort of the fabric by adding polyurethane, without affecting the antiviral and adhesive properties of the finishing agent. This may be because polyurethane itself has excellent flexibility, and its addition modifies the epoxy acrylate polymer, thus improving the flexibility of the cured finishing agent. Furthermore, polyurethane has a certain adsorption effect on nano-silver, making the antiviral material less likely to fall off.

[0067] As can be seen from Examples 1 and 8-9 and Table 2, this application demonstrates that by adding a substance containing an active hydrogen structure when adding an epoxy-containing adhesive to the finishing agent, the resulting finishing agent exhibits better antiviral durability. This may be because the ring-opening reaction between epoxy and amino groups is faster and more complete under these conditions, and it facilitates the ring-opening reaction between one amino group and two epoxy groups, strengthening the linkage between the amino and epoxy groups.

[0068] 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 antiviral fabric, comprising a fabric substrate of 90%-95% by weight and a finishing agent of 5%-10%, characterized in that, The finishing agent comprises the following raw materials in the indicated weight ratio: Proteins containing cysteine ​​and / or methionine: 7-10 servings; Nano silver: 0.5-1 part; Waterborne adhesives containing epoxy groups: 14-20 parts; The protein containing cysteine ​​and / or methionine is selected from at least one of metallothionein and whey protein. The epoxy-containing aqueous adhesive is an epoxy acrylate polymer emulsion. The finishing agent also includes 20%-30% by weight of waterborne polyurethane containing epoxy groups in its raw materials.

2. The antiviral fabric according to claim 1, characterized in that, The method for preparing the epoxy acrylate polymer emulsion includes the following steps: mixing acrylic acid, methyl methacrylate, and butyl acrylate evenly to prepare a pre-reactant; then heating the liquid epoxy resin to 60-90°C; adding the pre-reactant, emulsifier, initiator, and deionized water; maintaining the temperature for 1-2 hours; and then cooling to obtain the epoxy acrylate polymer emulsion.

3. The antiviral fabric according to claim 2, characterized in that, The epoxy value of the epoxy resin is 0.5-0.6 mol / 100g; the mass ratio of the epoxy resin to acrylic acid, methyl methacrylate and butyl acrylate is (10-50):(1-10):(10-50):(10-50).

4. The antiviral fabric according to any one of claims 1-3, characterized in that, The preparation method of the finishing agent includes the following steps: S201. Mix nano-silver with a protein containing cysteine ​​and / or methionine, and react the nano-silver with the thiol groups on the protein containing cysteine ​​and / or methionine to obtain a complex. S202. Add an epoxy-containing waterborne adhesive to the composite, react it, then add waterborne polyurethane, mix evenly, and obtain a finishing agent.

5. The antiviral fabric according to claim 4, characterized in that, In step S201, the reaction time of nano-silver with proteins containing cysteine ​​and / or methionine is 40-100 minutes, and the reaction temperature is 60-80℃.

6. The antiviral fabric according to claim 4, characterized in that, In step S202, 2%-5% of an active hydrogen-containing substance is added to the composite material containing an epoxy group by mass of an aqueous binder.

7. The method for preparing the antiviral fabric according to any one of claims 1-6, characterized in that, The finishing agent is applied to the fabric substrate by any of the following methods: padding, impregnation, spraying, coating, or brushing, followed by drying and setting to obtain an antiviral fabric.

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