Wear-resistant composite fabric and preparation method thereof

Abstract

The invention relates to the technical field of fabrics, and discloses a wear-resistant composite fabric and a preparation method thereof. The composite fabric comprises a base layer, an antibacterial layer and a wear-resistant layer, wherein the base layer is prepared by blending cotton fibers and polyester fibers according to a blending ratio of 6: 4; the antibacterial layer is formed by weaving cotton fibers subjected to antibacterial treatment through an antibacterial agent, and the antibacterial effect is more remarkable; and the wear-resistant layer is formed by laminating a modified polyurethane film. The composite fabric has excellent antibacterial performance and wear resistance, and can be widely applied to the fields of garment fabric, textile manufacturing and the like.

Description

Technical Field

[0001] The present invention relates to the technical field of fabrics, and particularly relates to a wear-resistant composite fabric and a preparation method thereof. Background Art

[0002] With the improvement of people's living standards, the requirements for textile products such as clothing, outdoor equipment, and automotive interiors are no longer limited to basic warmth and comfort, but more attention is paid to the multifunctionality of the products. For example, sports clothing requires excellent wear resistance due to frequent friction and washing, and the sweat generated after exercise will breed bacteria, so long-lasting and efficient antibacterial properties are needed.

[0003] Although the current fabrics have certain wear resistance, their wear resistance is not good. After long-term friction and washing, the fabrics will have holes and become thinner. And generally, the antibacterial fabrics on the market are treated by impregnating the fabrics or fibers in antibacterial agents to make them antibacterial. However, for the fabrics treated by impregnation, the antibacterial performance decreases with the increase of the number of washing times and cannot achieve the effect of long-lasting antibacterial. Therefore, researchers are required to develop a composite fabric with excellent wear resistance and long-lasting antibacterial properties to meet the actual needs of people. Summary of the Invention

[0004] In order to solve the above technical problems, the present invention provides a wear-resistant composite fabric and a preparation method thereof.

[0005] The purpose of the present invention can be achieved by the following technical solutions:

[0006] A wear-resistant composite fabric, comprising a base layer, an antibacterial layer, and a wear-resistant layer. The base layer is made by blending cotton fibers and polyester fibers according to a blending ratio of 6:4. The antibacterial layer is woven from antibacterial cotton fibers, and the wear-resistant layer is a modified polyurethane film;

[0007] The modified polyurethane film comprises the following raw materials in parts by weight: 40-50 parts of polyurethane resin, 50-70 parts of dimethylformamide, 3-5 parts of polypropylene fiber, 6-10 parts of compatibilizer, and 5-10 parts of reinforcing agent;

[0008] Further, the compatibilizer is maleic anhydride grafted TPU;

[0009] The reinforcing agent is prepared by the following steps:

[0010] Step A1: Disperse 5-bromo-1-pentanol and sodium hydroxide in N,N-dimethylformamide, add pyrrole and react for 24 h, and purify to obtain a pyrrole derivative;

[0011] Step A2: Disperse the LiF-HCl-treated MXene nanosheets in a sodium carbonate solution, then slowly add a calcium chloride solution and react for 8 - 12 min. Centrifuge, wash, filter, redisperse in deionized water, let stand for 24 h, filter, and dry to obtain the MXene / CaCO3 material;

[0012] Step A3: Disperse the MXene / CaCO3 material and p-toluenesulfonic acid in deionized water, add the pyrrole mixture and disperse evenly, adjust the system temperature to 0 - 5 °C, slowly dropwise add an ammonium persulfate solution, stir and react for 24 h, filter with suction, wash, and dry to obtain the enhancer;

[0013] Further, in Step A1, the mass ratio of 5-bromo-1-pentanol to pyrrole is 2 - 5:0.5 - 2;

[0014] Further, in Step A1, the dosage of sodium hydroxide is 60 wt% - 80 wt% of 5-bromo-1-pentanol;

[0015] Further, in Step A2, the mass ratio of the LiF-HCl-treated MXene nanosheets, sodium carbonate solution, and calcium chloride solution is 2 - 5:50:100;

[0016] Further, in Step A2, the concentration of the sodium carbonate solution is 0.5 - 2 mol / L, and the concentration of the calcium chloride solution is 1 - 4 mol / L;

[0017] Further, in Step A3, the mass ratio of the MXene / CaCO3 material, p-toluenesulfonic acid, pyrrole mixture, and ammonium persulfate solution is 3 - 6:0.5 - 1:1.5 - 3:1 - 3, and the concentration of the ammonium persulfate solution is 0.05 - 0.1 mol / L;

[0018] Further, in Step A3, the mass ratio of pyrrole to pyrrole derivative in the pyrrole mixture is 0.5 - 1:1 - 2.

[0019] The antibacterial cotton fiber is prepared by the following steps:

[0020] Step B1: Mix methyldiethanolamine and 3,5-dihydroxybenzoic acid in dimethyl sulfoxide, heat to 90 - 110 °C, stir and react for 30 min, then introduce nitrogen, simultaneously add cyclohexane and p-toluenesulfonic acid, further heat to 130 - 140 °C and react for 1 h, then stop introducing nitrogen, and continue to react under vacuum conditions for 1.5 - 2.5 h, and purify to obtain the phenol derivative;

[0021] Step B2: Disperse epichlorohydrin in methanol, heat in an oil bath to 65 °C, slowly add the phenol derivative under stirring conditions, and carry out reflux condensation reaction for 5 - 6 h, distill under reduced pressure, wash, and dry to obtain the antibacterial agent;

[0022] Step B3: Mix the alkali-treated cotton fibers, sodium hydroxide, antibacterial agent, and dioxane evenly, heat to 60 - 80 °C and react for 6 - 8 h, then raise the temperature to 90 °C and react for 2 h, wash and dry to obtain antibacterial cotton fibers;

[0023] Further, in step B1, the molar ratio of methyldiethanolamine to 3,5-dihydroxybenzoic acid is 1 - 2:2 - 4, the dosage of cyclohexane is 20% of the volume of dimethyl sulfoxide, and the dosage of p-toluenesulfonic acid is 0.5 wt% of 3,5-dihydroxybenzoic acid;

[0024] Further, in step B2, the dosage ratio of epichlorohydrin, methanol, and phenol derivative is 10 - 20 mL:150 mL:2 - 5 g;

[0025] Further, in step B3, the dosage ratio of alkali-treated cotton fibers, sodium hydroxide, antibacterial agent, and dioxane is 10 g:0.5 - 1 g:2 - 4 g:100 mL;

[0026] Further, the alkali-treated cotton fibers in step B3 are prepared by the following steps: Disperse 20 g of cotton fibers in 500 mL of 10 wt% sodium hydroxide solution, raise the temperature to 50 °C and stir for 4 h, then add 200 mL of ethanol and stir for 20 min, filter by suction, wash until the pH of the filtrate is neutral, and dry to obtain alkali-treated cotton fibers.

[0027] A preparation method of a wear-resistant composite fabric includes the following steps:

[0028] Step S1: Weigh the raw materials by weight, mix the polyurethane resin in half of the dimethylformamide, and heat to 70 °C to swell for 12 - 16 h, denoted as the mixture; then mix the polypropylene fiber, compatibilizer, and reinforcing agent evenly in the remaining dimethylformamide, add the mixture and stir for 5 - 6 h to obtain the coating solution; then use a coating machine to coat the coating solution into a film with a thickness of 65 - 75 μm and dry to obtain the modified polyurethane film;

[0029] Step S2: Blended-spin the cotton fiber and polyester fiber according to a blending ratio of 6:4 to form a base layer; then weave the antibacterial cotton fibers to form an antibacterial layer;

[0030] Step S3: Stack, align, and composite the base layer and the antibacterial layer to form a primary fabric, then laminate the modified polyurethane film on the surface of the antibacterial layer of the primary fabric and press to obtain the wear-resistant composite fabric.

[0031] The beneficial effects of the present invention:

[0032] The composite fabric in the present invention comprises a base layer, an antibacterial layer and a wear-resistant layer; wherein, the base layer is made by blending cotton fibers and polyester fibers according to a blending ratio of 6:4; the antibacterial layer is woven after antibacterial treatment of cotton fibers with an antibacterial agent, and the antibacterial effect is more remarkable; the wear-resistant layer is formed by laminating a modified polyurethane film. The composite fabric has excellent antibacterial properties and wear resistance, and can be widely used in the fields of clothing fabrics, textile manufacturing, etc.

[0033] MXene nanosheets, calcium carbonate and polypyrrole derivatives in the reinforcing agent act synergistically to improve the wear resistance of the wear-resistant layer film of the fabric; wherein, MXene nanosheets utilize their excellent self-lubricating properties to significantly reduce the friction coefficient of the film and improve the wear resistance; however, since the nanosheets are brittle and will break under stress, resulting in a decrease in wear resistance, therefore, in this application, the nanosheets are coated twice on the surface. The coating of calcium carbonate can protect the nanosheets with its own hardness, while the coating of polypyrrole derivatives can buffer the external stress with its flexible chain segments to achieve secondary protection, thereby improving the wear resistance of the film; in addition, the amino and hydroxyl groups in the polypyrrole derivatives can also form hydrogen bonds with the amide bonds in the polyurethane molecular chain, making the reinforcing agent firmly present in the film and forming a network structure with the polyurethane matrix to enhance the strength of the film.

[0034] Antibacterial cotton fibers are used as the antibacterial layer material in the antibacterial layer, which can endow the composite fabric with long-term antibacterial effect; the combination of the antibacterial agent and the cotton fibers belongs to chemical bonding, which is different from the antibacterial cotton fibers obtained by impregnation treatment with antibacterial agents on the market. The antibacterial cotton fibers obtained by chemical bonding have a more lasting antibacterial effect; and the phenolic group and quaternary ammonium salt structure act synergistically to kill bacteria, and the antibacterial effect is more remarkable. Specific embodiments

[0035] The technical solutions in the embodiments of the present invention will be clearly and completely described below. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0036] Example 1: The reinforcing agent is prepared by the following steps:

[0037] Step A1: Disperse 2 g of 5-bromo-1-pentanol and 1.2 g of sodium hydroxide in N,N-dimethylformamide, add 0.5 g of pyrrole and react for 24 h, and purify to obtain polypyrrole derivatives;

[0038] Step A2: Disperse the MXene nanosheets treated with 2 g of LiF-HCl in 50 g of 0.5 mol / L sodium carbonate solution, then slowly add 100 g of 1 mol / L calcium chloride solution and react for 8 min. Centrifuge, wash, filter, and redisperse in deionized water and let stand for 24 h. Filter and dry to obtain the MXene / CaCO3 material;

[0039] Step A3: Disperse 3 g of the MXene / CaCO3 material and 0.5 g of p-toluenesulfonic acid in deionized water, add 1.5 g of pyrrole mixture and disperse evenly, adjust the system temperature to 0 °C, slowly dropwise add 1.5 g of 0.05 mol / L ammonium persulfate solution and stir to react for 24 h. Filter, wash, and dry to obtain the enhancer. The mass ratio of pyrrole to pyrrole derivative in the pyrrole mixture is 0.5:1.

[0040] The antibacterial cotton fiber is prepared by the following steps:

[0041] Step B1: Mix 0.1 mol of methyldiethanolamine and 0.2 mol of 3,5-dihydroxybenzoic acid in 100 mL of dimethyl sulfoxide, heat up to 90 °C, stir and react for 30 min, then introduce nitrogen gas. At the same time, add 20 mL of cyclohexane and p-toluenesulfonic acid, then heat up to 130 °C and react for 1 h. Then stop introducing nitrogen gas and continue to react for 1.5 h under vacuum conditions. Purify to obtain the phenol derivative. The dosage of p-toluenesulfonic acid is 0.5 wt% of 3,5-dihydroxybenzoic acid;

[0042] Step B2: Disperse 10 mL of epichlorohydrin in 150 mL of methanol, heat up to 65 °C in an oil bath, slowly add 2 g of the phenol derivative under stirring conditions, and carry out reflux condensation reaction for 5 h. Distill under reduced pressure, wash, and dry to obtain the antibacterial agent;

[0043] Step B3: Mix 10 g of alkali-treated cotton fiber, 0.5 g of sodium hydroxide, 2 g of the antibacterial agent, and 100 mL of dioxane evenly, heat up to 60 °C and react for 6 h, then heat up to 90 °C and react for 2 h. Wash and dry to obtain the antibacterial cotton fiber;

[0044] Furthermore, the alkali-treated cotton fiber in Step B3 is prepared by the following steps: Disperse 20 g of cotton fiber in 500 mL of 10 wt% sodium hydroxide solution, heat up to 50 °C and stir for 4 h, then add 200 mL of ethanol and stir for 20 min. Filter, wash until the pH of the filtrate is neutral, and dry to obtain the alkali-treated cotton fiber.

[0045] Example 2: The enhancer is prepared by the following steps:

[0046] Step A1: Disperse 3.5 g of 5-bromo-1-pentanol and 2.5 g of sodium hydroxide in N,N-dimethylformamide, add 1 g of pyrrole and react for 24 h, then purify to obtain the pyrrole derivative;

[0047] Step A2: Disperse 3.5 g of MXene nanosheets treated with LiF-HCl in 50 g of 1 mol / L sodium carbonate solution, then slowly add 100 g of 2 mol / L calcium chloride solution and react for 10 min. Centrifuge, wash, filter, and redisperse in deionized water and let stand for 24 h, then filter and dry to obtain the MXene / CaCO3 material;

[0048] Step A3: Disperse 4.5 g of MXene / CaCO3 material and 0.75 g of p-toluenesulfonic acid in deionized water, add 2.5 g of pyrrole mixture and disperse evenly, adjust the system temperature to 2 °C, slowly dropwise add 1.6 g of 0.075 mol / L ammonium persulfate solution and stir to react for 24 h, then filter, wash, and dry to obtain the enhancer. The mass ratio of pyrrole to pyrrole derivative in the pyrrole mixture is 0.7:1.8.

[0049] The antibacterial cotton fiber is prepared by the following steps:

[0050] Step B1: Mix 0.15 mol of methyldiethanolamine and 0.3 mol of 3,5-dihydroxybenzoic acid in 100 mL of dimethyl sulfoxide, heat to 100 °C, stir and react for 30 min, then introduce nitrogen, add 20 mL of cyclohexane and p-toluenesulfonic acid at the same time, then heat to 135 °C and react for 1 h, then stop introducing nitrogen and continue to react under vacuum conditions for 2 h, and purify to obtain the phenol derivative. The dosage of p-toluenesulfonic acid is 0.5 wt% of 3,5-dihydroxybenzoic acid;

[0051] Step B2: Disperse 15 mL of epichlorohydrin in 150 mL of methanol, heat in an oil bath to 65 °C, slowly add 3.5 g of phenol derivative under stirring conditions, and carry out reflux condensation reaction for 5.5 h, then carry out vacuum distillation, wash, and dry to obtain the antibacterial agent;

[0052] Step B3: Mix 10 g of alkali-treated cotton fiber, 0.75 g of sodium hydroxide, 3 g of antibacterial agent and 100 mL of dioxane evenly, heat to 70 °C and react for 7 h, then heat to 90 °C and react for 2 h, wash and dry to obtain the antibacterial cotton fiber;

[0053] Furthermore, the alkali-treated cotton fiber in Step B3 is prepared by the following steps: Disperse 20 g of cotton fiber in 500 mL of 10 wt% sodium hydroxide solution, heat to 50 °C and stir for 4 h, then add 200 mL of ethanol and stir for 20 min, filter, wash until the pH of the filtrate is neutral, and dry to obtain the alkali-treated cotton fiber.

[0054] Example 3: The enhancer is prepared by the following steps:

[0055] Step A1: Disperse 5 g of 5-bromo-1-pentanol and 4 g of sodium hydroxide in N,N-dimethylformamide, add 2 g of pyrrole and react for 24 h, then purify to obtain the pyrrole derivative;

[0056] Step A2: Disperse 5 g of MXene nanosheets treated with LiF-HCl in 50 g of 2 mol / L sodium carbonate solution, then slowly add 100 g of 4 mol / L calcium chloride solution and react for 12 min. Centrifuge, wash, filter, and redisperse in deionized water and let stand for 24 h, then filter and dry to obtain the MXene / CaCO3 material;

[0057] Step A3: Disperse 6 g of MXene / CaCO3 material and 1 g of p-toluenesulfonic acid in deionized water, add 3 g of pyrrole mixture and disperse evenly, adjust the system temperature to 5 °C, slowly dropwise add 3 g of 0.1 mol / L ammonium persulfate solution and stir to react for 24 h, then filter, wash, and dry to obtain the enhancer. The mass ratio of pyrrole to pyrrole derivative in the pyrrole mixture is 1:2.

[0058] The antibacterial cotton fiber is prepared by the following steps:

[0059] Step B1: Mix 0.2 mol of methyldiethanolamine and 0.4 mol of 3,5-dihydroxybenzoic acid in 100 mL of dimethyl sulfoxide, heat up to 110 °C, stir and react for 30 min, then introduce nitrogen, simultaneously add 20 mL of cyclohexane and p-toluenesulfonic acid, then heat up to 140 °C and react for 1 h, then stop introducing nitrogen and continue to react under vacuum conditions for 2.5 h, and purify to obtain the phenol derivative. The dosage of p-toluenesulfonic acid is 0.5 wt% of 3,5-dihydroxybenzoic acid;

[0060] Step B2: Disperse 20 mL of epichlorohydrin in 150 mL of methanol, heat up the oil bath to 65 °C, slowly add 5 g of phenol derivative under stirring conditions, and carry out reflux condensation reaction for 6 h, then carry out reduced pressure distillation, wash, and dry to obtain the antibacterial agent;

[0061] Step B3: Mix 10 g of alkali-treated cotton fiber, 1 g of sodium hydroxide, 4 g of antibacterial agent and 100 mL of dioxane evenly, heat up to 80 °C and react for 8 h, then heat up to 90 °C and react for 2 h, wash, and dry to obtain the antibacterial cotton fiber;

[0062] Further, the alkali-treated cotton fibers in step B3 are prepared by the following steps: Disperse 20 g of cotton fibers in 500 mL of 10 wt% sodium hydroxide solution, heat up to 50 °C and stir for 4 h, then add 200 mL of ethanol and stir for 20 min, filter by suction, wash until the pH of the filtrate is neutral, and dry to obtain the alkali-treated cotton fibers.

[0063] Example 4: A preparation method of a wear-resistant composite fabric comprises the following steps:

[0064] 40 parts of polyurethane resin, 50 parts of dimethylformamide, 3 parts of polypropylene fiber, 6 parts of maleic anhydride-grafted TPU, and 5 parts of the reinforcing agent prepared in Example 1;

[0065] Step S1: Weigh the raw materials by weight. Mix the polyurethane resin in half of the dimethylformamide and heat up to 70 °C to swell for 12 h, denoted as the mixture; then mix the polypropylene fiber, maleic anhydride-grafted TPU, and the reinforcing agent prepared in Example 1 evenly in the remaining dimethylformamide, add the mixture and stir for 5 h to obtain the coating solution; then use a coating machine to coat the coating solution into a film with a thickness of 65 μm and dry it to obtain the modified polyurethane film;

[0066] Step S2: Blend cotton fibers and polyester fibers according to a blending ratio of 6:4 to form a base layer; then weave the antibacterial cotton fibers prepared in Example 1 to form an antibacterial layer;

[0067] Step S3: Stack, align, and composite the base layer and the antibacterial layer to form a primary fabric, then laminate the modified polyurethane film on the surface of the antibacterial layer of the primary fabric and press it to obtain the wear-resistant composite fabric.

[0068] Example 5: A preparation method of a wear-resistant composite fabric comprises the following steps:

[0069] 45 parts of polyurethane resin, 60 parts of dimethylformamide, 4 parts of polypropylene fiber, 8 parts of maleic anhydride-grafted TPU, and 7 parts of the reinforcing agent prepared in Example 2;

[0070] Step S1: Weigh the raw materials by weight. Mix the polyurethane resin in half of the dimethylformamide and heat up to 70 °C to swell for 14 h, denoted as the mixture; then mix the polypropylene fiber, maleic anhydride-grafted TPU, and the reinforcing agent prepared in Example 2 evenly in the remaining dimethylformamide, add the mixture and stir for 5.5 h to obtain the coating solution; then use a coating machine to coat the coating solution into a film with a thickness of 70 μm and dry it to obtain the modified polyurethane film;

[0071] Step S2: Blend cotton fibers and polyester fibers according to a blending ratio of 6:4 to form a base layer; then weave the antibacterial cotton fibers prepared in Example 2 to form an antibacterial layer;

[0072] Step S3: Stack, align, and laminate the base layer and the antibacterial layer to form a primary fabric. Then, laminate the modified polyurethane film on the surface of the antibacterial layer of the primary fabric and press it to obtain the wear-resistant composite fabric.

[0073] Example 6: A method for preparing a wear-resistant composite fabric includes the following steps:

[0074] 50 parts of polyurethane resin, 70 parts of dimethylformamide, 5 parts of polypropylene fiber, 10 parts of maleic anhydride-grafted TPU, and 10 parts of the reinforcing agent prepared in Example 3;

[0075] Step S1: Weigh the raw materials by weight. Mix the polyurethane resin in half of the dimethylformamide and heat it to 70°C for swelling for 16 h, denoted as the mixture. Then, mix the polypropylene fiber, maleic anhydride-grafted TPU, and the reinforcing agent prepared in Example 3 evenly in the remaining dimethylformamide, add the mixture and stir for 6 h to obtain the coating solution. Then, use a coating machine to coat the coating solution into a film with a thickness of 75 μm and dry it to obtain the modified polyurethane film;

[0076] Step S2: Blend cotton fibers and polyester fibers according to a blending ratio of 6:4 to form a base layer. Then, weave the antibacterial cotton fibers prepared in Example 3 to form an antibacterial layer;

[0077] Step S3: Stack, align, and laminate the base layer and the antibacterial layer to form a primary fabric. Then, laminate the modified polyurethane film on the surface of the antibacterial layer of the primary fabric and press it to obtain the wear-resistant composite fabric.

[0078] Comparative Example 1: This comparative example is a composite fabric. The difference from Example 6 is that a commercially available reinforcing agent alumina is used instead of the reinforcing agent prepared in Example 3, and the rest are the same.

[0079] Comparative Example 2: This comparative example is a composite fabric. The difference from Example 6 is that 10 g of cotton fibers are impregnated in a commercially available 50 mL, 5 g / L quaternary ammonium salt antibacterial agent solution for 12 h and then dried, and then the dried antibacterial cotton fibers are used instead of the antibacterial cotton fibers prepared in Example 3, and the rest are the same.

[0080] Perform performance tests on the composite fabrics prepared in Examples 4 - 6 and Comparative Examples 1 - 2:

[0081] Antibacterial performance test: Conduct the test according to GB / T 20944.3 - 2008 "Evaluation of antibacterial properties of textiles - Part 3: Oscillation method", and analyze the antibacterial rate of each composite fabric after 100 washes;

[0082] Wear resistance test: Test the wear resistance according to the standard of GB / T 21196.2 - 2007 "Determination of fabric wear resistance by Martindale method - Part 2: Determination of specimen breakage";

[0083] The test results are shown in Table 1 as follows:

[0084] Table 1: Performance test results

[0085]

[0086] As can be seen from Table 1, after the composite fabric prepared by the present invention is washed 100 times and the antibacterial rate is tested, the antibacterial rate is above 95%. After the abrasion resistance test, the number of abrasion resistance times is above 2,600, indicating that the composite fabric has excellent antibacterial performance and abrasion resistance, and has broad application prospects in the fields of clothing, textiles, etc.

[0087] The above content is only an example and illustration of the concept of the present invention. Those skilled in the art of the present technology can make various modifications or supplements to the described specific embodiments or use similar methods for substitution, as long as they do not deviate from the scope defined by the concept of the invention, they should all fall within the protection scope of the present invention.

Claims

1. A wear-resistant composite fabric, characterized in that: It comprises a base layer, an antibacterial layer and a wear-resistant layer, wherein the base layer is made of cotton fiber and polyester fiber in a blending ratio of 6:4, the antibacterial layer is woven from antibacterial cotton fiber, and the wear-resistant layer is a modified polyurethane film; The modified polyurethane film comprises the following raw materials in parts by weight: 40-50 parts of polyurethane resin, 50-70 parts of dimethylformamide, 3-5 parts of polypropylene fiber, 6-10 parts of compatibilizer, and 5-10 parts of reinforcing agent; The reinforcing agent is a pyrrole derivative and pyrrole polymerized on the surface of MXene / CaCO3, the pyrrole derivative is prepared by a substitution reaction between 5-bromo-1-pentanol and pyrrole, and the MXene / CaCO3 material is a composite of calcium carbonate formed by the reaction of sodium carbonate and calcium chloride and MXene nanosheets treated with LiF-HCl; The antibacterial cotton fiber is prepared by a ring-opening reaction between an antibacterial agent and alkali-treated cotton fiber, the antibacterial agent is prepared by a quaternization reaction between a phenol derivative and epichlorohydrin, and the phenol derivative is prepared by an esterification reaction between methyldiethanolamine and 3,5-dihydroxybenzoic acid.

2. The wear-resistant composite fabric according to claim 1, characterized in that: The enhancer is prepared by the following steps: Step A1, dispersing 5-bromo-1-pentanol and sodium hydroxide in N,N-dimethylformamide, adding pyrrole to react for 24 hours, and purifying to obtain a pyrrole derivative; Step A2, dispersing the MXene nanosheets treated with LiF-HCl in a sodium carbonate solution, slowly adding a calcium chloride solution to react for 8-12 minutes, centrifuging, washing, filtering, and redispersing in deionized water and standing for 24 hours, filtering, and drying to obtain a MXene / CaCO3 material; Step A3, disperse the MXene / CaCO3 material and p-toluenesulfonic acid in deionized water, add the pyrrole mixture and disperse evenly, adjust the system temperature to 0-5°C, slowly drop the ammonium persulfate solution and stir to react for 24 hours, filter, wash and dry to obtain the enhancer.

3. The wear-resistant composite fabric according to claim 2, characterized in that: In step A1, the mass ratio of 5-bromo-1-pentanol to pyrrole is 2-5:0.5-2, and the amount of sodium hydroxide used is 60wt%-80wt% of 5-bromo-1-pentanol.

4. The wear-resistant composite fabric according to claim 2, characterized in that: In step A2, the mass ratio of the MXene nanosheets treated with LiF-HCl, the sodium carbonate solution and the calcium chloride solution is 2-5:50:100, the concentration of the sodium carbonate solution is 0.5-2 mol / L, and the concentration of the calcium chloride solution is 1-4 mol / L.

5. The wear-resistant composite fabric according to claim 2, characterized in that: In step A3, the mass ratio of MXene / CaCO3 material, p-toluenesulfonic acid, pyrrole mixture and ammonium persulfate solution is 3-6:0.5-1:1.5-3:1-3, the concentration of ammonium persulfate solution is 0.05-0.1 mol / L, and the mass ratio of pyrrole and pyrrole derivative in the pyrrole mixture is 0.5-1:1-2.

6. The wear-resistant composite fabric according to claim 1, characterized in that: The antibacterial cotton fiber is prepared by the following steps: Step B1, methyldiethanolamine and 3,5-dihydroxybenzoic acid are mixed in dimethyl sulfoxide, and the temperature is raised to 90-110° C., stirred for reaction for 30 minutes, and then nitrogen is introduced, and cyclohexane and p-toluenesulfonic acid are added at the same time, and the temperature is raised to 130-140° C. for reaction for 1 hour, and then the nitrogen is stopped, and the reaction is continued under vacuum conditions for 1.5-2.5 hours, and purified to obtain a phenol derivative; Step B2, dispersing epichlorohydrin in methanol, heating the oil bath to 65°C, slowly adding a phenol derivative under stirring conditions, and condensing and refluxing for 5-6 hours, distilling under reduced pressure, washing, and drying to obtain an antibacterial agent; Step B3, mix the alkali-treated cotton fiber, sodium hydroxide, antibacterial agent and dioxane evenly, heat to 60-80°C for reaction for 6-8h, then heat to 90°C for reaction for 2h, wash and dry to obtain antibacterial cotton fiber.

7. The wear-resistant composite fabric according to claim 6, characterized in that: In step B1, the molar ratio of methyldiethanolamine to 3,5-dihydroxybenzoic acid is 1-2:2-4, the amount of cyclohexane used is 20% by volume of dimethyl sulfoxide, and the amount of p-toluenesulfonic acid used is 0.5wt% of 3,5-dihydroxybenzoic acid.

8. The wear-resistant composite fabric according to claim 6, characterized in that: In step B2, the usage ratio of epichlorohydrin, methanol and phenol derivative is 10-20 mL:150 mL:2-5 g.

9. The wear-resistant composite fabric according to claim 6, characterized in that: In step B3, the amount ratio of alkali-treated cotton fiber, sodium hydroxide, antibacterial agent and dioxane is 10g:0.5-1g:2-4g:100mL. The alkali-treated cotton fiber is prepared by the following steps: 20g of cotton fiber is dispersed in 500mL, 10wt% sodium hydroxide solution, and the temperature is raised to 50°C and stirred for 4h, then 200mL of ethanol is added and stirred for 20min, filtered and washed until the pH of the filtrate is neutral, and dried to obtain the alkali-treated cotton fiber.

10. A method for preparing the wear-resistant composite fabric according to any one of claims 1 to 9, characterized in that: The following steps are involved: Step S1, weighing raw materials by weight, mixing the polyurethane resin in half of dimethylformamide, and heating to 70°C to swell for 12-16 hours, which is recorded as a mixture; then mixing the polypropylene fiber, the compatibilizer and the reinforcing agent in the remaining dimethylformamide, and then adding the mixture to stir for 5-6 hours to obtain a coating liquid; then using a coating machine to coat the coating liquid into a film with a thickness of 65-75 μm and drying it to obtain a modified polyurethane film; Step S2, blending cotton fiber and polyester fiber in a blending ratio of 6:4 to form a base layer; and then weaving antibacterial cotton fiber to form an antibacterial layer; Step S3, stacking, aligning and compounding the base layer and the antibacterial layer to form a primary fabric, and then laminating the modified polyurethane film on the surface of the antibacterial layer of the primary fabric and pressing them to obtain a wear-resistant composite fabric.

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