Breathable clothing fabric and preparation method thereof

Abstract

The present invention discloses a breathable clothing fabric and a preparation method thereof, relating to the technical field of fabrics. From the inside out, the fabric comprises a moisture-absorbing and breathable layer, an antibacterial layer, and a wear-resistant protective layer. The antibacterial layer is a fabric formed by interweaving a polyester low-elastic yarn as a warp and a yarn spun from a modified viscose fiber as a weft; the wear-resistant protective layer comprises the following raw materials in parts by weight: 35-45 parts of an organosilicon-modified polyurethane emulsion, 9-13 parts of a curing agent, 8-10 parts of a polyamide, 2-4 parts of a coupling agent, 25-35 parts of a modified nano-montmorillonite, 10-15 parts of a solvent, 1-2 parts of a dispersant, 1-2 parts of a leveling agent, and 2-4 parts of a toughening agent. The modified viscose fiber is a viscose fiber into which a quaternary ammonium salt and a phosphoramide structure are introduced to improve the antibacterial and flame retardancy of the fabric. The modified nano-montmorillonite is introduced with a thiophene ring and a benzotriazole ring, which meets the wear resistance requirements of the fabric while improving the anti-ultraviolet performance of the fabric.

Description

Technical Field

[0001] The present invention relates to the technical field of fabrics, and in particular to a breathable clothing fabric and a preparation method thereof. Background Art

[0002] Viscose fiber, with its excellent moisture absorption and comfort properties, is widely used in textiles, clothing, and other fields. However, in actual use, viscose fabrics suffer from shortcomings such as poor elasticity and insufficient abrasion resistance. They are also highly flammable, making them prone to fires, resulting in casualties and property damage. As living standards improve, people are placing higher demands on the antibacterial properties of viscose clothing fabrics.

[0003] Patent publication number CN113290960A discloses a breathable fabric comprising a base fabric layer, an antibacterial and deodorizing layer, and a wear-resistant layer, which combines multiple excellent properties such as breathability, moisture absorption, antibacterial properties, and wear resistance. However, the following deficiencies still exist: (1) The nano-montmorillonite used in the preparation of the wear-resistant layer is an inorganic filler with good wear resistance. It has not been subjected to prior organic treatment, and its dispersibility in the modified polyurethane emulsion used in the wear-resistant layer is poor; (2) The anti-ultraviolet agent used is directly added, which has the problem of small molecule migration and poor dispersion compatibility in the matrix, which is not conducive to maintaining the long-term anti-ultraviolet performance of the fabric. Summary of the Invention

[0004] In order to solve the above technical problems, the present invention provides a breathable clothing fabric and a preparation method thereof.

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

[0006] A breathable clothing fabric comprises, from inside to outside, a moisture-absorbing and breathable layer, an antibacterial layer, and a wear-resistant protective layer. The moisture-absorbing and breathable layer is located as the innermost layer, and the antibacterial layer is attached to the outer surface of the moisture-absorbing and breathable layer. The wear-resistant protective layer is attached to the outer surface of the antibacterial layer. The moisture-absorbing and breathable layer is formed by interweaving warp yarns and weft yarns, both of which are woven from blended yarns of cotton fiber and bamboo fiber. The antibacterial layer is formed by interweaving warp yarns and weft yarns, wherein the warp yarns are polyester low-stretch yarns and the weft yarns are yarns spun from modified viscose fibers.

[0007] The wear-resistant protective layer comprises the following raw materials in parts by weight: 35-45 parts of organosilicon-modified polyurethane emulsion, 9-13 parts of curing agent, 8-10 parts of polyamide, 2-4 parts of coupling agent, 25-35 parts of modified nano-montmorillonite, 10-15 parts of solvent, 1-2 parts of dispersant, 1-2 parts of leveling agent, and 2-4 parts of toughening agent; the curing agent is 4,4'-diaminodiphenylmethane; the coupling agent is KH550; the solvent is diethylene glycol ethyl ether; the dispersant is sodium N-(2-aminoethyl)aminoethane sulfonate; the leveling agent is polyester-modified polydimethylsiloxane solution; and the toughening agent is dibutyl phthalate.

[0008] The moisture-absorbing and breathable layer and the antibacterial layer are bonded with a TPU double-sided adhesive film; the wear-resistant protective layer is coated on the outer surface of the flame-retardant and antibacterial layer with a coating thickness of 100-120 μm;

[0009] The preparation of the breathable clothing fabric comprises the following steps:

[0010] Step S1: blending cotton fiber and bamboo fiber in a weight ratio of 2:1 to form yarn, and weaving the yarn as warp and weft to form a moisture-absorbing and breathable layer;

[0011] Step S2: Using polyester low-stretch yarn as the warp and yarn spun from modified viscose fiber as the weft, the two yarns are interwoven to form an antibacterial layer, and the antibacterial layer is bonded to the outer surface of the moisture-absorbing and breathable layer using a TPU double-sided adhesive film;

[0012] Step S3: mixing and stirring the organosilicon-modified polyurethane emulsion, curing agent, polyamide, coupling agent, modified nano-montmorillonite, solvent, dispersant, leveling agent and toughening agent for 25-35 minutes, and then applying the mixture to the outer surface of the antibacterial layer to obtain a wear-resistant protective layer. After drying, a breathable clothing fabric is obtained.

[0013] The preparation of the modified viscose fiber comprises the following steps:

[0014] Step A1: Diallyl chlorophosphate (supplier: Suzhou Xingbei Pharmaceutical Technology Co., Ltd.) is added to toluene, followed by N-methyl-p-nitroaniline. The mixture is stirred at 0-5°C for 2 hours, then heated to 40-50°C, refluxed and stirred for 1 hour, filtered, extracted, and dried to obtain a nitro product. The nitro product and ethyl acetate are added to a three-necked flask, heated to 45-55°C, refluxed and stirred, and then sodium dithionite is added. The mixture is refluxed and stirred for 1-1.5 hours to obtain an amino product.

[0015] Furthermore, the usage ratio of diallyl chlorophosphate, toluene, and N-methyl-p-nitroaniline is 0.1 mol: 70-80 mL: 0.1 mol; the usage ratio of the nitro product, ethyl acetate, and sodium dithionite is 0.1 mol: 80-90 mL: 0.1-0.15 mol;

[0016] During the reaction of step A1, phosphorus oxychloride in diallyl chlorophosphate reacts with the amino group of N-methyl-p-nitroaniline to generate a nitro product containing phosphoramide; then the nitro group of the nitro product is reduced to an amino group to obtain an amino product;

[0017] Step A2: Place 4-(N,N-diethylamino)-benzoic acid and ethanol in a flask, start stirring, then add 1-chlorohexane, raise the temperature to 50-60°C, and react with constant stirring for 10-12 hours. After rotary evaporation, recrystallize with acetone and filter to obtain a carboxyl product. The carboxyl product is added to DMF, and dichloride is added with stirring. The reaction is refluxed and stirred at 50°C for 4-5 hours to obtain an acyl chloride product.

[0018] Furthermore, the usage ratio of 4-(N,N-diethylamino)-benzoic acid, ethanol, and 1-chlorohexane is 0.1 mol: 65-75 mL: 0.1 mol, and the volume fraction of ethanol is 95%; the usage ratio of carboxyl product, DMF, and dichlorothionyl is 0.1 mol: 75-85 mL: 0.12-0.15 mol;

[0019] During the reaction of step A2, the tertiary amine of 4-(N,N-diethylamino)-benzoic acid reacts with the chlorine atom of 1-chlorohexane to generate a carboxyl product containing a quaternary ammonium salt; the carboxyl group of the carboxyl product reacts with thionyl chloride to generate an acyl chloride product;

[0020] Step A3: Add the above-mentioned amino product, potassium carbonate, and dimethyl sulfoxide to a flask to obtain a mixed solution a, then add the above-mentioned acyl chloride product to dimethyl sulfoxide to obtain a mixed solution b. Slowly add the mixed solution b dropwise to the mixed solution a in a 0°C ice-water bath. After the addition is complete, raise the temperature to 40°C, stir the reaction at constant temperature for 8-10 hours, and distill under reduced pressure to obtain the amide product.

[0021] Furthermore, the usage ratio of the amino product, potassium carbonate, and dimethyl sulfoxide is 0.1 mol: 0.006-0.008 mol: 90-100 mL; the usage ratio of the acyl chloride product and dimethyl sulfoxide is 0.1 mol: 85-95 mL; the usage ratio of the mixed solution a and the mixed solution b is 95-105 mL: 90-100 mL;

[0022] During the reaction of step A3, the acyl chloride of the acyl chloride product reacts with the amino group of the amino product to obtain an amide product containing two carbon-carbon double bonds;

[0023] Step A4: Add the amide product to dichloromethane, start stirring, then add 3-chloroperoxybenzoic acid, and stir at room temperature for 4-5 hours to obtain the diepoxy product; in a nitrogen atmosphere, add surface carboxyl-modified viscose fiber (see the paper "Synthesis and Optimization of Melamine-Grafted Viscose Fiber") and toluene to a flask, raise the temperature to 45°C, add pyridine, start stirring, add the diepoxy product to the flask, and stir for 8-10 hours to obtain the modified viscose fiber;

[0024] Furthermore, the ratio of the amount of the amide product, dichloromethane and 3-chloroperoxybenzoic acid is 0.1 mol: 200-210 mL: 0.1 mol; the ratio of the amount of the surface carboxylated viscose fiber, toluene, pyridine and diepoxy product is 60-70 g: 330-340 mL: 0.010-0.015 mol: 0.1 mol;

[0025] During the reaction process of step A4, the carbon-carbon double bond in the amide product is oxidized to an epoxy group to obtain a diepoxy product; the carboxyl group of the surface carboxylated viscose fiber undergoes a ring-opening reaction with the epoxy group of the diepoxy product to produce a modified viscose fiber.

[0026] The modified nano-montmorillonite is prepared by the following steps:

[0027] Step B1: Under a nitrogen atmosphere, add 2-(1-benzotriazole)acetic acid and toluene to a flask, heat to 45°C, add pyridine, start stirring, add 3-acetylthionaphthene to the flask, and stir for 8-10 hours to obtain a hydroxyl product;

[0028] Furthermore, the ratio of 2-(1-benzotriazole)acetic acid, toluene, pyridine and 3-acetylthionaphthene is 0.1 mol: 80-90 mL: 0.002-0.003 mol: 0.1 mol;

[0029] During the reaction of step B1, the carboxyl group of 2-(1-benzotriazole)acetic acid reacts with the epoxy group of 3-acetylthionaphthene to form a hydroxyl product;

[0030] Step B2: 2-diphenylphosphinobenzoic acid is added to DMF, and dichlorothionyl is added under stirring. The mixture is refluxed and stirred at 50°C for 4-5 hours to obtain an acyl chloride product a; the hydroxyl product, pyridine, triethylamine, and dimethyl sulfoxide are added to a flask to obtain a mixed solution 1, and the above-mentioned acyl chloride product a is then added to dimethyl sulfoxide to obtain a mixed solution 2. The mixed solution 2 is slowly added dropwise to the mixed solution 1 in a 0°C ice-water bath. After the addition is complete, the temperature is raised to 40°C, the mixture is stirred at constant temperature for 8-10 hours, and the mixture is distilled under reduced pressure to obtain a quaternary phosphonium product;

[0031] Furthermore, the usage ratio of 2-diphenylphosphinobenzoic acid, DMF, and dichlorothionyl is 0.1 mol: 70-80 mL: 0.12-0.15 mol; the usage ratio of the hydroxyl product, pyridine, triethylamine, and dimethyl sulfoxide is 0.1 mol: 0.01-0.013 mol: 0.1 mol: 90-100 mL; the usage ratio of the acyl chloride product a and dimethyl sulfoxide is 0.1 mol: 80-90 mL; the usage ratio of the mixed solution 1 and the mixed solution 2 is 95-105 mL: 85-95 mL;

[0032] During the reaction of step B2, the carboxyl group of 2-diphenylphosphinobenzoic acid reacts with thionyl chloride to generate an acyl chloride product a; the alcoholic hydroxyl group of the hydroxyl product further reacts with the acyl chloride product a to generate a quaternary phosphonium product;

[0033] Step B3: adding the quaternary phosphonium product, acetone and sodium iodide to a four-necked flask, introducing nitrogen, starting stirring, raising the temperature to 40°C, slowly dripping epichlorohydrin into the four-necked flask, stirring and reacting for 4-5 hours, filtering and washing with ethyl acetate, and then rotary evaporation, and vacuum drying at 40°C for 6-8 hours to obtain an epoxy quaternary phosphonium salt product; adding the epoxy quaternary phosphonium salt product to deionized water, grinding it with a sand mill for 30 minutes, slowly adding nano-montmorillonite, continuing to grind it with a sand mill for 2 hours, taking it out, stirring and filtering, washing it with deionized water until no white turbidity is produced when detected by silver nitrate solution, and then freeze-drying it to obtain modified nano-montmorillonite;

[0034] Furthermore, the usage ratio of the quaternary phosphonium product, acetone, sodium iodide and epichlorohydrin is 0.038 mol: 85-95 mL: 0.001-0.0015 g: 0.046 mol; the usage ratio of the epoxy quaternary phosphonium salt product, deionized water and nano-montmorillonite is 2.0-3.0 g: 80-90 mL: 1 g, and the concentration of the silver nitrate solution is 0.1 mol / L;

[0035] During the reaction of step B3, the quaternary phosphonium product and epichlorohydrin react through a nucleophilic substitution reaction to generate a quaternary phosphonium salt containing an epoxy group, namely an epoxy quaternary phosphonium salt product; the epoxy quaternary phosphonium salt in the epoxy quaternary phosphonium salt product reacts with the nano-montmorillonite and enters the montmorillonite layer to obtain a modified nano-montmorillonite.

[0036] Beneficial Effects of the Invention: The present invention discloses a breathable clothing fabric comprising, from the inside out, a moisture-absorbing and breathable layer, an antibacterial layer, and an abrasion-resistant protective layer. The moisture-absorbing and breathable layer is a fabric formed by interweaving warp and weft yarns woven from a blend of cotton and bamboo fibers; the antibacterial layer is a fabric formed by interweaving warp yarns from polyester low-stretch yarn and weft yarns spun from modified viscose fibers; and the abrasion-resistant protective layer comprises the following raw materials: a silicone-modified polyurethane emulsion, a curing agent, polyamide, a coupling agent, modified nano-montmorillonite, a solvent, a dispersant, and the like.

[0037] Both cotton fiber and bamboo fiber have good moisture absorption and breathability, and are suitable for the moisture absorption and breathability layer of the breathable clothing fabric of the present invention. The polyester low-stretch yarn used in the process of preparing the antibacterial layer has good elasticity, which makes up for the disadvantage of the insufficient elasticity of viscose fiber. Quaternary ammonium salt and phosphoramide structure are introduced into the viscose fiber through chemical reaction to obtain modified viscose fiber. When bacteria come into contact with the modified viscose fiber containing quaternary ammonium salt, the negatively charged bacteria are attracted by the cations on its surface, resulting in the bacteria's freedom of movement being restricted, inhibiting the bacteria's respiratory function, thereby playing an antibacterial role. When the fabric burns, the phosphoramide structure has a synergistic flame retardant effect produced by the formation of a dense carbon layer in the solid phase by the phosphorus and nitrogen flame retardants and the generation of nitrogen-containing non-flammable gas in the gas phase, preventing the fabric from continuing to burn. Using modified viscose fiber in the antibacterial layer gives the fabric good antibacterial and flame retardancy.

[0038] The wear-resistant protective layer is obtained by mixing and stirring an organic silicon modified polyurethane emulsion, a curing agent, a polyamide, a coupling agent, a modified nano-montmorillonite, a solvent, a dispersant, etc., and then coating the mixture on the surface of the antibacterial layer. Nano-montmorillonite is an inorganic filler with good wear resistance, which meets the wear resistance requirements of the wear-resistant protective layer. The modified nano-montmorillonite is obtained by allowing a compound containing a thiophene ring and a benzotriazole structure to enter the montmorillonite layer through the action of an epoxy quaternary phosphonium salt structure and montmorillonite, thereby organicizing the montmorillonite and enhancing its compatibility with the organic silicon modified polyurethane emulsion, etc., thereby enhancing the compatibility and dispersibility of the compound containing a thiophene ring and a benzotriazole structure in the matrix, avoiding migration failure, and ensuring long-term function. The introduction of the thiophene ring not only broadens the ultraviolet absorption range, but also increases the molar absorption coefficient, thereby enhancing the ultraviolet absorption function. The benzotriazole structure is a very effective ultraviolet absorption group with high chemical stability. When ultraviolet rays are irradiated on the surface of the fabric, it can absorb the energy of the ultraviolet rays and convert it into heat energy or harmless radiation, thereby preventing the fabric from fading. Modified nano-montmorillonite is used in the wear-resistant protective layer to give the fabric long-lasting UV resistance. DETAILED DESCRIPTION

[0039] The following is a clear and complete description of the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making any creative efforts are within the scope of protection of the present invention.

[0040] Example 1

[0041] A modified viscose fiber, the preparation of which comprises the following steps:

[0042] Step A1: Diallyl chlorophosphate (supplier: Suzhou Xingbei Pharmaceutical Technology Co., Ltd.) was added to toluene, followed by N-methyl-p-nitroaniline. The mixture was stirred at 0°C for 2 hours, then heated to 40°C, refluxed and stirred at constant temperature for 1 hour, filtered, extracted, and dried to obtain a nitro product. The nitro product and ethyl acetate were added to a three-necked flask, heated to 45°C, refluxed and stirred, and then sodium dithionite was added. The mixture was refluxed and stirred for 1 hour to obtain an amino product. The ratio of diallyl chlorophosphate, toluene, and N-methyl-p-nitroaniline was 0.1 mol:70 mL:0.1 mol; the ratio of nitro product, ethyl acetate, and sodium dithionite was 0.1 mol:80 mL:0.1 mol.

[0043] Step A2: 4-(N,N-diethylamino)-benzoic acid and ethanol are placed in a flask, stirred, and then 1-chlorohexane is added. The temperature is raised to 50°C, and the mixture is stirred at this constant temperature for 10 hours. After rotary evaporation, the mixture is recrystallized with acetone and filtered to obtain a carboxyl product. The carboxyl product is added to DMF, and dichloride is added with stirring. The mixture is refluxed and stirred at 50°C for 4 hours to obtain an acyl chloride product. The amount ratio of 4-(N,N-diethylamino)-benzoic acid, ethanol, and 1-chlorohexane is 0.1 mol:65 mL:0.1 mol, and the volume fraction of ethanol is 95%; the amount ratio of the carboxyl product, DMF, and dichloride is 0.1 mol:75 mL:0.12 mol.

[0044] Step A3: The amino product, potassium carbonate, and dimethyl sulfoxide are added to a flask to obtain a mixed solution a, and then the acyl chloride product is added to dimethyl sulfoxide to obtain a mixed solution b. The mixed solution b is slowly added dropwise to the mixed solution a in an ice-water bath at 0°C. After the addition is complete, the mixture is heated to 40°C, stirred at this constant temperature for 8 hours, and distilled under reduced pressure to obtain an amide product. The amount ratio of the amino product, potassium carbonate, and dimethyl sulfoxide is 0.1 mol:0.006 mol:90 mL; the amount ratio of the acyl chloride product and dimethyl sulfoxide is 0.1 mol:85 mL; and the amount ratio of the mixed solution a to the mixed solution b is 95 mL:90 mL.

[0045] Step A4: Add the amide product to dichloromethane, start stirring, and then add 3-chloroperbenzoic acid, stir and react at room temperature for 4 hours to obtain the diepoxy product; in a nitrogen atmosphere, add surface carboxylated viscose fiber (see the paper "Synthesis and Optimization Process of Grafted Melamine Viscose Fiber" for details) and toluene to a flask, heat to 45°C, add pyridine, start stirring, add the diepoxy product to the flask, stir and react for 8 hours to obtain modified viscose fiber; the amount ratio of amide product, dichloromethane and 3-chloroperbenzoic acid is 0.1 mol: 200 mL: 0.1 mol; the amount ratio of surface carboxylated viscose fiber, toluene, pyridine and diepoxy product is 60 g: 330 mL: 0.010 mol: 0.1 mol.

[0046] Example 2

[0047] A modified viscose fiber, the preparation of which comprises the following steps:

[0048] Step A1: Diallyl chlorophosphate (supplier: Suzhou Xingbei Pharmaceutical Technology Co., Ltd.) was added to toluene, followed by N-methyl-p-nitroaniline. The mixture was stirred at 0°C for 2 hours, then heated to 45°C, refluxed and stirred at constant temperature for 1 hour, filtered, extracted, and dried to obtain a nitro product. The nitro product and ethyl acetate were added to a three-necked flask, heated to 50°C, refluxed and stirred, and then sodium dithionite was added. The mixture was refluxed and stirred for 1.3 hours to obtain an amino product. The ratio of diallyl chlorophosphate, toluene, and N-methyl-p-nitroaniline was 0.1 mol:75 mL:0.1 mol; the ratio of nitro product, ethyl acetate, and sodium dithionite was 0.1 mol:85 mL:0.13 mol.

[0049] Step A2: 4-(N,N-diethylamino)-benzoic acid and ethanol were placed in a flask, stirred, and then 1-chlorohexane was added. The temperature was raised to 55°C, and the mixture was stirred at this temperature for 11 hours. After rotary evaporation, the mixture was recrystallized with acetone and filtered to obtain a carboxyl product. The carboxyl product was added to DMF, and dichloride was added with stirring. The mixture was refluxed and stirred at 50°C for 4.5 hours to obtain an acyl chloride product. The ratio of 4-(N,N-diethylamino)-benzoic acid, ethanol, and 1-chlorohexane was 0.1 mol:70 mL:0.1 mol, and the volume fraction of ethanol was 95%; the ratio of the carboxyl product, DMF, and dichloride was 0.1 mol:80 mL:0.13 mol.

[0050] Step A3: The amino product, potassium carbonate, and dimethyl sulfoxide are added to a flask to obtain a mixed solution a, and then the acyl chloride product is added to dimethyl sulfoxide to obtain a mixed solution b. The mixed solution b is slowly added dropwise to the mixed solution a in an ice-water bath at 0°C. After the addition is complete, the temperature is raised to 40°C, and the reaction is stirred at this constant temperature for 9 hours, followed by vacuum distillation to obtain an amide product. The amount ratio of the amino product, potassium carbonate, and dimethyl sulfoxide is 0.1 mol:0.007 mol:95 mL; the amount ratio of the acyl chloride product and dimethyl sulfoxide is 0.1 mol:90 mL; and the amount ratio of the mixed solution a to the mixed solution b is 100 mL:95 mL.

[0051] Step A4: Add the amide product to dichloromethane, start stirring, and then add 3-chloroperbenzoic acid. Stir and react at room temperature for 4.5 hours to obtain the diepoxy product. In a nitrogen atmosphere, add surface carboxylated viscose fiber (see the paper "Synthesis and Optimization Process of Grafted Melamine Viscose Fiber" for details) and toluene to a flask, heat to 45°C, add pyridine, start stirring, add the diepoxy product to the flask, stir and react for 9 hours to obtain modified viscose fiber. The amount ratio of amide product, dichloromethane and 3-chloroperbenzoic acid is 0.1 mol: 205 mL: 0.1 mol; the amount ratio of surface carboxylated viscose fiber, toluene, pyridine and diepoxy product is 65 g: 335 mL: 0.013 mol: 0.1 mol.

[0052] Example 3

[0053] A modified viscose fiber, the preparation of which comprises the following steps:

[0054] Step A1: Diallyl chlorophosphate (supplier: Suzhou Xingbei Pharmaceutical Technology Co., Ltd.) was added to toluene, followed by N-methyl-p-nitroaniline. The mixture was stirred at 5°C for 2 hours, then heated to 50°C, refluxed and stirred at constant temperature for 1 hour, filtered, extracted, and dried to obtain a nitro product. The nitro product and ethyl acetate were added to a three-necked flask, heated to 55°C, refluxed and stirred, and then sodium dithionite was added. The mixture was refluxed and stirred for 1.5 hours to obtain an amino product. The ratio of diallyl chlorophosphate, toluene, and N-methyl-p-nitroaniline was 0.1 mol:80 mL:0.1 mol; the ratio of nitro product, ethyl acetate, and sodium dithionite was 0.1 mol:90 mL:0.15 mol.

[0055] Step A2: 4-(N,N-diethylamino)-benzoic acid and ethanol were placed in a flask, stirred, and then 1-chlorohexane was added. The temperature was raised to 60°C, and the mixture was stirred at this constant temperature for 12 hours. After rotary evaporation, the mixture was recrystallized with acetone and filtered to obtain a carboxyl product. The carboxyl product was added to DMF, and dichloride was added with stirring. The mixture was refluxed and stirred at 50°C for 5 hours to obtain an acyl chloride product. The ratio of 4-(N,N-diethylamino)-benzoic acid, ethanol, and 1-chlorohexane was 0.1 mol:75 mL:0.1 mol, and the volume fraction of ethanol was 95%; the ratio of the carboxyl product, DMF, and dichloride was 0.1 mol:85 mL:0.15 mol.

[0056] Step A3: The amino product, potassium carbonate, and dimethyl sulfoxide are added to a flask to obtain a mixed solution a, and then the acyl chloride product is added to dimethyl sulfoxide to obtain a mixed solution b. The mixed solution b is slowly added dropwise to the mixed solution a in an ice-water bath at 0°C. After the addition is complete, the mixture is heated to 40°C, stirred at this constant temperature for 10 hours, and distilled under reduced pressure to obtain an amide product. The amount ratio of the amino product, potassium carbonate, and dimethyl sulfoxide is 0.1 mol:0.008 mol:100 mL; the amount ratio of the acyl chloride product and dimethyl sulfoxide is 0.1 mol:95 mL; and the amount ratio of the mixed solution a to the mixed solution b is 105 mL:100 mL.

[0057] Step A4: Add the amide product to dichloromethane, start stirring, and then add 3-chloroperbenzoic acid, stir and react at room temperature for 4-5 hours to obtain the diepoxy product; in a nitrogen atmosphere, add surface carboxylated viscose fiber (see the paper "Synthesis and Optimization Process of Grafted Melamine Viscose Fiber" for details) and toluene to a flask, heat to 45°C, add pyridine, start stirring, add the diepoxy product to the flask, stir and react for 10 hours to obtain modified viscose fiber; the amount ratio of amide product, dichloromethane and 3-chloroperbenzoic acid is 0.1 mol: 210 mL: 0.1 mol; the amount ratio of surface carboxylated viscose fiber, toluene, pyridine and diepoxy product is 70 g: 340 mL: 0.015 mol: 0.1 mol.

[0058] Example 4

[0059] A modified nano-montmorillonite, the preparation of which comprises the following steps:

[0060] Step B1: Under a nitrogen atmosphere, add 2-(1-benzotriazole)acetic acid and toluene to a flask, heat to 45°C, add pyridine, start stirring, add 3-acetylthionaphthene to the flask, and stir for 8 hours to obtain a hydroxyl product; the ratio of 2-(1-benzotriazole)acetic acid, toluene, pyridine and 3-acetylthionaphthene is 0.1 mol:80 mL:0.002 mol:0.1 mol;

[0061] Step B2: 2-diphenylphosphinobenzoic acid was added to DMF, and dichlorothionyl was added under stirring. The mixture was refluxed and stirred at 50°C for 4 hours to obtain the acyl chloride product a. The hydroxyl product, pyridine, triethylamine and dimethyl sulfoxide were added to a flask to obtain a mixture 1. The above acyl chloride product a was then added to dimethyl sulfoxide to obtain a mixture 2. The mixture 2 was slowly added dropwise to the mixture 1 in a 0°C ice-water bath. After the addition was complete, the mixture was heated to 40°C, stirred at constant temperature for 8 hours, and the pressure was reduced. Distillation was performed to obtain a quaternary phosphorus product; the usage ratio of 2-diphenylphosphinobenzoic acid, DMF, and thionyl chloride was 0.1 mol: 70 mL: 0.12 mol; the usage ratio of the hydroxyl product, pyridine, triethylamine, and dimethyl sulfoxide was 0.1 mol: 0.01 mol: 0.1 mol: 90 mL; the usage ratio of the acyl chloride product a and dimethyl sulfoxide was 0.1 mol: 80 mL; the usage ratio of the mixed solution 1 and the mixed solution 2 was 95 mL: 85 mL;

[0062] Step B3: Add the quaternary phosphonium product, acetone and sodium iodide to a four-necked flask, introduce nitrogen, start stirring, heat to 40 ° C, slowly drop epichlorohydrin into the four-necked flask, stir and react for 4 hours, filter and wash with ethyl acetate, and then rotary evaporate, and vacuum dry at 40 ° C for 6 hours to obtain an epoxy quaternary phosphonium salt product; add the epoxy quaternary phosphonium salt product to deionized water, grind it with a sand mill for 30 minutes, slowly add nano-montmorillonite, continue to grind it with a sand mill for 2 hours, and take The mixture was taken out, stirred and filtered, washed with deionized water until no white turbidity was produced when detected by silver nitrate solution, and then freeze-dried to obtain modified nano-montmorillonite; the dosage ratio of quaternary phosphonium product, acetone, sodium iodide and epichlorohydrin was 0.038 mol:85 mL:0.001 g:0.046 mol; the dosage ratio of epoxy quaternary phosphonium salt product, deionized water and nano-montmorillonite was 2.0 g:80 mL:1 g, and the concentration of silver nitrate solution was 0.1 mol / L.

[0063] Example 5

[0064] A modified nano-montmorillonite, the preparation of which comprises the following steps:

[0065] Step B1: Under a nitrogen atmosphere, add 2-(1-benzotriazole)acetic acid and toluene to a flask, heat to 45°C, add pyridine, start stirring, add 3-acetylthionaphthene to the flask, and stir for 9 hours to obtain the hydroxyl product; the ratio of 2-(1-benzotriazole)acetic acid, toluene, pyridine and 3-acetylthionaphthene is 0.1 mol:85 mL:0.0025 mol:0.1 mol;

[0066] Step B2: 2-diphenylphosphinobenzoic acid was added to DMF, and dichlorothionyl was added under stirring. The mixture was refluxed and stirred at 50°C for 4.5 hours to obtain the acyl chloride product a. The hydroxyl product, pyridine, triethylamine and dimethyl sulfoxide were added to a flask to obtain a mixture 1. The above acyl chloride product a was then added to dimethyl sulfoxide to obtain a mixture 2. The mixture 2 was slowly added dropwise to the mixture 1 in a 0°C ice-water bath. After the addition was complete, the mixture was heated to 40°C, stirred at constant temperature for 9 hours, and the pressure was reduced. Distillation was performed to obtain a quaternary phosphorus product; the usage ratio of 2-diphenylphosphinobenzoic acid, DMF, and thionyl chloride was 0.1 mol: 75 mL: 0.13 mol; the usage ratio of the hydroxyl product, pyridine, triethylamine, and dimethyl sulfoxide was 0.1 mol: 0.012 mol: 0.1 mol: 95 mL; the usage ratio of the acyl chloride product a and dimethyl sulfoxide was 0.1 mol: 85 mL; the usage ratio of the mixed solution 1 and the mixed solution 2 was 100 mL: 90 mL;

[0067] Step B3: Add the quaternary phosphonium product, acetone and sodium iodide to a four-necked flask, introduce nitrogen, start stirring, heat to 40 ° C, slowly drop epichlorohydrin into the four-necked flask, stir and react for 4.5 hours, filter and wash with ethyl acetate, and then rotary evaporate, and vacuum dry at 40 ° C for 7 hours to obtain an epoxy quaternary phosphonium salt product; add the epoxy quaternary phosphonium salt product to deionized water, grind it with a sand mill for 30 minutes, slowly add nano-montmorillonite, continue grinding with a sand mill for 2 hours, and take The mixture was taken out, stirred and filtered, washed with deionized water until no white turbidity was produced when detected by silver nitrate solution, and then freeze-dried to obtain modified nano-montmorillonite; the dosage ratio of quaternary phosphonium product, acetone, sodium iodide and epichlorohydrin was 0.038 mol:90 mL:0.0013 g:0.046 mol; the dosage ratio of epoxy quaternary phosphonium salt product, deionized water and nano-montmorillonite was 2.5 g:85 mL:1 g, and the concentration of silver nitrate solution was 0.1 mol / L.

[0068] Example 6

[0069] A modified nano-montmorillonite, the preparation of which comprises the following steps:

[0070] Step B1: Under a nitrogen atmosphere, add 2-(1-benzotriazole)acetic acid and toluene to a flask, heat to 45°C, add pyridine, start stirring, add 3-acetylthionaphthene to the flask, and stir for 10 hours to obtain a hydroxyl product; the ratio of 2-(1-benzotriazole)acetic acid, toluene, pyridine and 3-acetylthionaphthene is 0.1 mol:90 mL:0.003 mol:0.1 mol;

[0071] Step B2: 2-diphenylphosphinobenzoic acid was added to DMF, and dichlorothionyl was added under stirring. The mixture was refluxed and stirred at 50°C for 5 h to obtain the acyl chloride product a. The hydroxyl product, pyridine, triethylamine and dimethyl sulfoxide were added to a flask to obtain a mixture 1. The above acyl chloride product a was then added to dimethyl sulfoxide to obtain a mixture 2. The mixture 2 was slowly added dropwise to the mixture 1 in a 0°C ice-water bath. After the addition was complete, the mixture was heated to 40°C, stirred at constant temperature for 10 h, and evaporated under reduced pressure. distillation to obtain a quaternary phosphorus product; the usage ratio of 2-diphenylphosphinobenzoic acid, DMF, and thionyl chloride is 0.1 mol: 80 mL: 0.15 mol; the usage ratio of hydroxyl product, pyridine, triethylamine, and dimethyl sulfoxide is 0.1 mol: 0.013 mol: 0.1 mol: 100 mL; the usage ratio of acyl chloride product a and dimethyl sulfoxide is 0.1 mol: 90 mL; the usage ratio of mixed solution 1 and mixed solution 2 is 105 mL: 95 mL;

[0072] Step B3: Add the quaternary phosphonium product, acetone and sodium iodide to a four-necked flask, introduce nitrogen, start stirring, heat to 40°C, slowly drop epichlorohydrin into the four-necked flask, stir and react for 5 hours, filter and wash with ethyl acetate, and then rotary evaporate and vacuum dry at 40°C for 8 hours to obtain the epoxy quaternary phosphonium salt product; add the epoxy quaternary phosphonium salt product to deionized water, grind it with a sand mill for 30 minutes, slowly add nano-montmorillonite, continue grinding with a sand mill for 2 hours, and take out , stirred and filtered, washed with deionized water until no white turbidity was produced when detected by silver nitrate solution, and then freeze-dried to obtain modified nano-montmorillonite; the dosage ratio of quaternary phosphonium product, acetone, sodium iodide and epichlorohydrin was 0.038 mol: 95 mL: 0.0015 g: 0.046 mol; the dosage ratio of epoxy quaternary phosphonium salt product, deionized water and nano-montmorillonite was 3.0 g: 90 mL: 1 g, and the concentration of silver nitrate solution was 0.1 mol / L.

[0073] Example 7

[0074] A breathable clothing fabric comprises, from inside to outside, a moisture-absorbing and breathable layer, an antibacterial layer, and a wear-resistant protective layer. The moisture-absorbing and breathable layer is located as the innermost layer, and the antibacterial layer is attached to the outer surface of the moisture-absorbing and breathable layer. The wear-resistant protective layer is attached to the outer surface of the antibacterial layer. The moisture-absorbing and breathable layer is formed by interweaving warp yarns and weft yarns, both of which are woven from blended yarns of cotton fiber and bamboo fiber. The antibacterial layer is formed by interweaving warp yarns and weft yarns, wherein the warp yarns are polyester low-stretch yarns and the weft yarns are yarns spun from modified viscose fibers.

[0075] The wear-resistant protective layer comprises the following raw materials in parts by weight: 35 parts of organosilicon-modified polyurethane emulsion, 9 parts of curing agent, 8 parts of polyamide, 2 parts of coupling agent, 25 parts of modified nano-montmorillonite, 10 parts of solvent, 1 part of dispersant, 1 part of leveling agent, and 2 parts of toughening agent; the curing agent is 4,4'-diaminodiphenylmethane; the coupling agent is KH550; the solvent is diethylene glycol ethyl ether; the dispersant is sodium N-(2-aminoethyl)aminoethane sulfonate; the leveling agent is polyester-modified polydimethylsiloxane solution; and the toughening agent is dibutyl phthalate.

[0076] The moisture-absorbing and breathable layer and the antibacterial layer are bonded with a TPU double-sided adhesive film; the wear-resistant protective layer is coated on the outer surface of the flame-retardant and antibacterial layer with a coating thickness of 100 μm;

[0077] The preparation of the breathable clothing fabric comprises the following steps:

[0078] Step S1: blending cotton fiber and bamboo fiber in a weight ratio of 2:1 to form yarn, and weaving the yarn as warp and weft to form a moisture-absorbing and breathable layer;

[0079] Step S2: Using polyester low-stretch yarn as the warp and the yarn spun from the modified viscose fiber obtained in Example 1 as the weft, interweaving them one above the other to form an antibacterial layer, and bonding the antibacterial layer to the outer surface of the moisture-absorbing and breathable layer with a TPU double-sided adhesive film;

[0080] Step S3: After mixing and stirring the organosilicon-modified polyurethane emulsion, curing agent, polyamide, coupling agent, modified nano-montmorillonite obtained in Example 4, solvent, dispersant, leveling agent and toughening agent for 25 minutes, the mixture is applied to the outer surface of the above-mentioned antibacterial layer to obtain a wear-resistant protective layer. After drying, a breathable clothing fabric is obtained.

[0081] Example 8

[0082] A breathable clothing fabric comprises, from inside to outside, a moisture-absorbing and breathable layer, an antibacterial layer, and a wear-resistant protective layer. The moisture-absorbing and breathable layer is located as the innermost layer, and the antibacterial layer is attached to the outer surface of the moisture-absorbing and breathable layer. The wear-resistant protective layer is attached to the outer surface of the antibacterial layer. The moisture-absorbing and breathable layer is formed by interweaving warp yarns and weft yarns, both of which are woven from blended yarns of cotton fiber and bamboo fiber. The antibacterial layer is formed by interweaving warp yarns and weft yarns, wherein the warp yarns are polyester low-stretch yarns and the weft yarns are yarns spun from modified viscose fibers.

[0083] The wear-resistant protective layer comprises the following raw materials in parts by weight: 40 parts of organosilicon-modified polyurethane emulsion, 11 parts of curing agent, 9 parts of polyamide, 3 parts of coupling agent, 30 parts of modified nano-montmorillonite, 13 parts of solvent, 1.5 parts of dispersant, 1.5 parts of leveling agent, and 3 parts of toughening agent; the curing agent is 4,4'-diaminodiphenylmethane; the coupling agent is KH550; the solvent is diethylene glycol ethyl ether; the dispersant is sodium N-(2-aminoethyl)aminoethane sulfonate; the leveling agent is polyester-modified polydimethylsiloxane solution; and the toughening agent is dibutyl phthalate.

[0084] The moisture-absorbing and breathable layer and the antibacterial layer are bonded with a TPU double-sided adhesive film; the wear-resistant protective layer is coated on the outer surface of the flame-retardant and antibacterial layer with a coating thickness of 110 μm;

[0085] The preparation of the breathable clothing fabric comprises the following steps:

[0086] Step S1: blending cotton fiber and bamboo fiber in a weight ratio of 2:1 to form yarn, and weaving the yarn as warp and weft to form a moisture-absorbing and breathable layer;

[0087] Step S2: Using polyester low-stretch yarn as the warp and the yarn spun from the modified viscose fiber obtained in Example 2 as the weft, interweaving them one above the other to form an antibacterial layer, and bonding the antibacterial layer to the outer surface of the moisture-absorbing and breathable layer with a TPU double-sided adhesive film;

[0088] Step S3: After mixing and stirring the organosilicon-modified polyurethane emulsion, curing agent, polyamide, coupling agent, modified nano-montmorillonite obtained in Example 5, solvent, dispersant, leveling agent and toughening agent for 30 minutes, the mixture is applied to the outer surface of the above-mentioned antibacterial layer to obtain a wear-resistant protective layer. After drying, a breathable clothing fabric is obtained.

[0089] Example 9

[0090] A breathable clothing fabric comprises, from inside to outside, a moisture-absorbing and breathable layer, an antibacterial layer, and a wear-resistant protective layer. The moisture-absorbing and breathable layer is located as the innermost layer, and the antibacterial layer is attached to the outer surface of the moisture-absorbing and breathable layer. The wear-resistant protective layer is attached to the outer surface of the antibacterial layer. The moisture-absorbing and breathable layer is formed by interweaving warp yarns and weft yarns, both of which are woven from blended yarns of cotton fiber and bamboo fiber. The antibacterial layer is formed by interweaving warp yarns and weft yarns, wherein the warp yarns are polyester low-stretch yarns and the weft yarns are yarns spun from modified viscose fibers.

[0091] The wear-resistant protective layer comprises the following raw materials in parts by weight: 45 parts of organosilicon-modified polyurethane emulsion, 13 parts of curing agent, 10 parts of polyamide, 4 parts of coupling agent, 35 parts of modified nano-montmorillonite, 15 parts of solvent, 2 parts of dispersant, 2 parts of leveling agent, and 4 parts of toughening agent; the curing agent is 4,4'-diaminodiphenylmethane; the coupling agent is KH550; the solvent is diethylene glycol ethyl ether; the dispersant is sodium N-(2-aminoethyl)aminoethane sulfonate; the leveling agent is polyester-modified polydimethylsiloxane solution; and the toughening agent is dibutyl phthalate.

[0092] The moisture-absorbing and breathable layer and the antibacterial layer are bonded with a TPU double-sided adhesive film; the wear-resistant protective layer is coated on the outer surface of the flame-retardant and antibacterial layer with a coating thickness of 120 μm;

[0093] The preparation of the breathable clothing fabric comprises the following steps:

[0094] Step S1: blending cotton fiber and bamboo fiber in a weight ratio of 2:1 to form yarn, and weaving the yarn as warp and weft to form a moisture-absorbing and breathable layer;

[0095] Step S2: Using polyester low-stretch yarn as the warp and the yarn spun from the modified viscose fiber obtained in Example 3 as the weft, interweaving them one above the other to form an antibacterial layer, and bonding the antibacterial layer to the outer surface of the moisture-absorbing and breathable layer with a TPU double-sided adhesive film;

[0096] Step S3: After mixing and stirring the organosilicon-modified polyurethane emulsion, curing agent, polyamide, coupling agent, modified nano-montmorillonite obtained in Example 6, solvent, dispersant, leveling agent and toughening agent for 35 minutes, the mixture is applied to the outer surface of the antibacterial layer to obtain a wear-resistant protective layer. After drying, a breathable clothing fabric is obtained.

[0097] Comparative Example 1

[0098] Compared with Example 9, the modified viscose fiber was replaced with viscose fiber, and the rest was exactly the same as Example 9 to prepare a breathable clothing fabric.

[0099] Comparative Example 2

[0100] Compared with Example 9, the modified nano-montmorillonite is replaced with substance 1, and the thiophene ring and benzotriazole structure are not introduced. The rest is exactly the same as Example 9, and a breathable clothing fabric is obtained. The preparation process of substance 1: triphenylphosphine, acetone and sodium iodide are added to a four-necked flask, nitrogen is introduced, stirring is started, the temperature is raised to 40°C, epichlorohydrin is slowly dripped into the four-necked flask, stirred and reacted for 5 hours, filtered and washed with ethyl acetate, and then rotary evaporated, and vacuum dried at 40°C for 8 hours to obtain epoxy quaternary phosphonium salt product 1; epoxy quaternary phosphonium salt product 1 is added to deionized water, ground with a sand mill for 30 minutes, nano-montmorillonite is slowly added, and grinding with a sand mill is continued. 2h, take out, stir and filter, wash with deionized water until no white turbidity is produced when detected by silver nitrate solution, and then freeze-dry to obtain substance 1; the dosage ratio of triphenylphosphine, acetone, sodium iodide and epichlorohydrin is 0.038mol:80mL:0.0015g:0.046mol; the dosage ratio of epoxy quaternary phosphonium salt product 1, deionized water and nano-montmorillonite is 3.0g:90mL:1g, and the concentration of silver nitrate solution is 0.1mol / L.

[0101] The breathable clothing fabric prepared by the present invention is further tested for its effect, and the test results are as follows.

[0102] In order to test the breathable clothing fabrics prepared by the present invention, the antibacterial rate was determined according to GB / T20944.3-2008 "Evaluation of antibacterial properties of textiles Part 3: Oscillation method"; UV aging method: the clothing fabrics obtained in Examples 7-9 and Comparative Examples 1-2 were placed in an ultraviolet ray with an intensity of 5000 μw / cm 2 The wavelength of the UV lamp was 280-400 nm, and the aging temperature was 50°C. After aging for 20 h, the breaking strength retention was determined according to ASTM D5034-09 (2013) "Standard Test Method for Tensile and Tear Strength of Textiles (Fabric Grab Strength Test)"; the limiting oxygen index was determined according to GB / T5454-1997 "Textiles Burning Behavior Test - Oxygen Index Method" and the results are recorded in Table 1.

[0103] Table 1: Test results

[0104]

[0105]

[0106] According to the data in Table 1, the clothing fabric prepared by the present invention has excellent antibacterial properties, UV aging resistance, and flame retardancy. Comparison of Example 9 with Comparative Example 1 shows that the use of modified viscose fiber and the introduction of quaternary ammonium salts and phosphoramide structures improve the antibacterial and flame retardancy of the fabric. Comparison of Example 9 with Comparative Example 2 shows that the use of modified nano-montmorillonite and the introduction of thiophene rings and benzotriazole rings improves the UV resistance of the fabric.

[0107] The above content is merely an example and explanation of the concept of the present invention. Those skilled in the art may make various modifications or additions to the described specific embodiments or replace them in a similar manner. As long as they do not deviate from the concept of the invention or exceed the scope defined by the claims, they should all fall within the scope of protection of the present invention.

Claims

1. A breathable clothing fabric, characterized by: From the inside to the outside, it includes a moisture-absorbing and breathable layer, an antibacterial layer, and a wear-resistant protective layer. The moisture-absorbing and breathable layer is located in the innermost layer, and the outer surface of the moisture-absorbing and breathable layer is attached to the antibacterial layer. The outer surface of the antibacterial layer is attached to the wear-resistant protective layer. The moisture-absorbing and breathable layer is a fabric formed by interweaving warp yarns and weft yarns, and the warp yarns and weft yarns are woven from a blend of cotton fiber and bamboo fiber. The antibacterial layer is a fabric formed by interweaving warp yarns and weft yarns, and the warp yarns are polyester low-elastic yarns, and the weft yarns are yarns spun from modified viscose fibers. The wear-resistant protective layer comprises the following raw materials in parts by weight: 35-45 parts of silicone-modified polyurethane emulsion, 9-13 parts of curing agent, 8-10 parts of polyamide, 2-4 parts of coupling agent, 25-35 parts of modified nano-montmorillonite, 10-15 parts of solvent, 1-2 parts of dispersant, 1-2 parts of leveling agent, and 2-4 parts of toughening agent. The preparation of the modified viscose fiber comprises the following steps: Step A1: Add diallyl chlorophosphate to toluene, then add N-methyl-p-nitroaniline, stir at 0-5°C for 2 hours, then heat to 40-50°C, reflux with stirring at constant temperature for 1 hour, filter, extract, and dry to obtain a nitro product; add the nitro product and ethyl acetate to a three-necked flask, heat to 45-55°C, reflux with stirring, then add sodium dithionite, and reflux with stirring for 1-1.5 hours to obtain an amino product; The usage ratio of diallyl chlorophosphate, toluene, and N-methyl-p-nitroaniline is 0.1 mol: 70-80 mL: 0.1 mol; the usage ratio of nitro product, ethyl acetate, and sodium dithionite is 0.1 mol: 80-90 mL: 0.1-0.15 mol; Step A2: Place 4-(N,N-diethylamino)-benzoic acid and ethanol in a flask, start stirring, then add 1-chlorohexane, raise the temperature to 50-60°C, and react with constant stirring for 10-12 hours. After rotary evaporation, recrystallize with acetone and filter to obtain the carboxyl product; The carboxyl product was added to DMF, and dichlorothionyl was added under stirring. The mixture was refluxed and stirred at 50°C for 4-5 hours to obtain the acyl chloride product. The ratio of 4-(N,N-diethylamino)-benzoic acid, ethanol, and 1-chlorohexane is 0.1 mol: 65-75 mL: 0.1 mol, and the volume fraction of ethanol is 95%; the ratio of carboxyl product, DMF, and dichlorothionyl is 0.1 mol: 75-85 mL: 0.12-0.15 mol; Step A3: Add the above-mentioned amino product, potassium carbonate, and dimethyl sulfoxide to a flask to obtain a mixed solution a, then add the above-mentioned acyl chloride product to dimethyl sulfoxide to obtain a mixed solution b. Slowly add the mixed solution b dropwise to the mixed solution a in a 0°C ice-water bath. After the addition is complete, raise the temperature to 40°C, stir the reaction at constant temperature for 8-10 hours, and distill under reduced pressure to obtain the amide product. The usage ratio of the amino product, potassium carbonate, and dimethyl sulfoxide is 0.1 mol: 0.006-0.008 mol: 90-100 mL; the usage ratio of the acyl chloride product and dimethyl sulfoxide is 0.1 mol: 85-95 mL; the usage ratio of the mixed solution a and the mixed solution b is 95-105 mL: 90-100 mL; Step A4: Add the amide product to dichloromethane, start stirring, then add 3-chloroperoxybenzoic acid, and stir at room temperature for 4-5 hours to obtain the diepoxy product. Under a nitrogen atmosphere, add surface carboxylated viscose fiber and toluene to a flask, raise the temperature to 45°C, add pyridine, start stirring, add the diepoxy product to the flask, and stir for 8-10 hours to obtain the modified viscose fiber. The usage ratio of the amide product, dichloromethane and 3-chloroperoxybenzoic acid is 0.1 mol: 200-210 mL: 0.1 mol; the usage ratio of the surface carboxylated viscose fiber, toluene, pyridine and diepoxy product is 60-70 g: 330-340 mL: 0.010-0.015 mol: 0.1 mol.

2. The breathable clothing fabric according to claim 1, characterized in that: The preparation of the modified nano-montmorillonite comprises the following steps: Step B1: Under a nitrogen atmosphere, add 2-(1-benzotriazole)acetic acid and toluene to a flask, heat to 45°C, add pyridine, start stirring, add 3-acetylthionaphthene to the flask, and stir for 8-10 hours to obtain a hydroxyl product; The ratio of 2-(1-benzotriazole)acetic acid, toluene, pyridine and 3-acetylthionaphthene is 0.1 mol: 80-90 mL: 0.002-0.003 mol: 0.1 mol; Step B2: 2-diphenylphosphinobenzoic acid is added to DMF, and dichlorothionyl is added under stirring. The mixture is refluxed and stirred at 50°C for 4-5 hours to obtain an acyl chloride product a; the hydroxyl product, pyridine, triethylamine, and dimethyl sulfoxide are added to a flask to obtain a mixed solution 1, and the above-mentioned acyl chloride product a is then added to dimethyl sulfoxide to obtain a mixed solution 2. The mixed solution 2 is slowly added dropwise to the mixed solution 1 in a 0°C ice-water bath. After the addition is complete, the temperature is raised to 40°C, the mixture is stirred at constant temperature for 8-10 hours, and the mixture is distilled under reduced pressure to obtain a quaternary phosphonium product; The usage ratio of 2-diphenylphosphinobenzoic acid, DMF, and thionyl chloride is 0.1 mol: 70-80 mL: 0.12-0.15 mol; the usage ratio of the hydroxyl product, pyridine, triethylamine, and dimethyl sulfoxide is 0.1 mol: 0.01-0.013 mol: 0.1 mol: 90-100 mL; the usage ratio of the acyl chloride product a and dimethyl sulfoxide is 0.1 mol: 80-90 mL; the usage ratio of the mixed solution 1 and the mixed solution 2 is 95-105 mL: 85-95 mL; Step B3: adding the quaternary phosphonium product, acetone and sodium iodide to a four-necked flask, introducing nitrogen, starting stirring, raising the temperature to 40°C, slowly dripping epichlorohydrin into the four-necked flask, stirring and reacting for 4-5 hours, filtering and washing with ethyl acetate, and then rotary evaporation, and vacuum drying at 40°C for 6-8 hours to obtain an epoxy quaternary phosphonium salt product; adding the epoxy quaternary phosphonium salt product to deionized water, grinding it with a sand mill for 30 minutes, slowly adding nano-montmorillonite, continuing to grind it with a sand mill for 2 hours, taking it out, stirring and filtering, washing it with deionized water until no white turbidity is produced when detected by silver nitrate solution, and then freeze-drying it to obtain modified nano-montmorillonite; The dosage ratio of the quaternary phosphonium product, acetone, sodium iodide and epichlorohydrin is 0.038 mol: 85-95 mL: 0.001-0.0015 g: 0.046 mol; the dosage ratio of the epoxy quaternary phosphonium salt product, deionized water and nano-montmorillonite is 2.0-3.0 g: 80-90 mL: 1 g, and the concentration of the silver nitrate solution is 0.1 mol / L.

3. The breathable clothing fabric according to claim 1, characterized in that: The moisture-absorbing and breathable layer and the antibacterial layer are bonded with a TPU double-sided adhesive film; the wear-resistant protective layer is coated on the outer surface of the antibacterial layer with a coating thickness of 100-120 μm; the curing agent is 4,4'-diaminodiphenylmethane, the coupling agent is KH550, the solvent is diethylene glycol ethyl ether, the dispersant is sodium N-(2-aminoethyl)aminoethane sulfonate, the leveling agent is polyester-modified polydimethylsiloxane solution, and the toughening agent is dibutyl phthalate.

4. The method for preparing a breathable clothing fabric according to claim 1, wherein: The steps include: Step S1: blending cotton fiber and bamboo fiber in a weight ratio of 2:1 to form yarn, and weaving the yarn as warp and weft to form a moisture-absorbing and breathable layer; Step S2: Using polyester low-stretch yarn as the warp and yarn spun from modified viscose fiber as the weft, the two yarns are interwoven to form an antibacterial layer, and the antibacterial layer is bonded to the outer surface of the moisture-absorbing and breathable layer using a TPU double-sided adhesive film; Step S3: After mixing and stirring the organosilicon-modified polyurethane emulsion, curing agent, polyamide, coupling agent, modified nano-montmorillonite, solvent, dispersant, leveling agent and toughening agent for 25-35 minutes, the mixture is applied to the outer surface of the antibacterial layer to obtain a wear-resistant protective layer. After drying, a breathable clothing fabric is obtained.

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