A method for preparing a Janus fabric with antibacterial and moisture permeability by mist polymerization

Abstract

The application discloses a fog polymerization preparation method of Janus fabric with antibacterial and moisture-permeable capacity, and comprises the following steps: (1) embedding quaternary ammonium salt block copolymer emulsion on one side of cotton fabric through fog polymerization; (2) heating the cotton fabric treated in step (1) at high temperature for 5 minutes, rinsing and drying to obtain Janus fabric with antibacterial and moisture-permeable capacity. The Janus fabric with antibacterial and moisture-permeable capacity is prepared by grafting quaternary ammonium salt block copolymer to one side surface of cotton fiber through the fog polymerization technology.

Description

Technical Field

[0001] The invention belongs to the field of new textile materials, and particularly relates to a method for preparing Janus fabric with antibacterial and moisture-permeable capabilities through mist polymerization. Background Art

[0002] Cotton fabrics have excellent properties such as hygroscopicity, flexibility, and breathability. However, since cotton fabrics absorb a lot of water, their breathability and moisture permeability are significantly reduced, and the wearer will feel sticky and wet after sweating. In addition, sweat also provides comfortable conditions for bacterial reproduction. Therefore, cotton fabrics with antibacterial and moisture-permeability enhancement functions have become a current research and development focus. Most traditional fabric finishing agents only have a single function of antibacterial or moisture-permeability enhancement, and multiple finishing or composite finishing with multiple reagents are required to obtain antibacterial and moisture-permeable fabrics. Invention patent publication number CN111118888A obtains a composite super-hydrophobic antibacterial finishing agent by sequentially adding silver nitrate, ammonia water, ethyl orthosilicate, and hexadecyltrimethoxysilane to an aqueous solution, and then immerses cotton fabrics pretreated with urea in the above-mentioned finishing agent to obtain super-hydrophobic antibacterial textiles with super-hydrophobic and antibacterial properties. Invention patent publication number CN109505142A obtains a hydrophobic, oleophobic, flame-retardant, and antibacterial coating for the surface of fabric materials by mixing methyltriethoxysilane, perfluorooctyltriethoxysilane, modified nano-dioxide, and water.

[0003] Patent publication number CN109706735A invents a single-sided super-hydrophobic and single-sided hydrophilic Janus (fabric with different surface properties on both sides) type fabric by plasma glow discharge treatment. Patent publication number CN111634091A invents a unidirectional moisture-conducting textile composite material with a Janus structure. Among them, polypropylene fibers are deposited on the outer layer of cotton fabric by melt electrospinning, and then the prepared textile composite material is subjected to a wetting and hydrophilic treatment. The resulting polypropylene fiber inner layer has an average pore size of 13.82 microns, and the outer layer of cotton fabric is 5.04 microns. There is a significant wettability difference between the inner and outer layers, and the unidirectional moisture-conductivity coefficient can reach 1103.1%. Patent publication number CN112252019B invents uses a femtosecond laser to process the single-sided surface of a hydrophobic fabric to form a super-hydrophilic micro-nano structure, thereby inventing a sweat-wicking and cooling fabric with a Janus structure.

[0004] The above method has the following problems: (1) the required production process and equipment are complex and not suitable for large-scale production; (2) the energy consumption is high; (3) the finishing reagent has a single function and requires multiple or multiple reagent composite finishing to obtain the antibacterial and moisture permeability function. Summary of the Invention

[0005] In order to solve the above technical problems existing in the prior art, the present invention adopts "mist polymerization" technology to graft quaternary ammonium salt block copolymer (PMMA-b-PQHDMA) on one side of cotton fabric to prepare Janus fabric with antibacterial and moisture-permeable functions.

[0006] Quaternary ammonium polymers possess highly effective bactericidal properties, and their performance can be manipulated through careful molecular design. Random copolymers, however, face challenges in functional design, such as molecular structural uncertainty, which can affect their antimicrobial properties. Block copolymers, by contrast, offer greater advantages in molecular structure control. "Mist polymerization" technology has been used to modify cotton fabrics, imparting both antimicrobial and moisture-permeable properties without compromising their inherent properties.

[0007] The present invention first synthesizes a PMMA-b-PQHDMA block copolymer, and then grafts PMMA-b-PQHDMA onto one side of a cotton fabric through a "mist polymerization" method, thereby obtaining a cotton fabric with a Janus structure, which simultaneously possesses excellent antibacterial properties and moisture permeability. The PMMA-b-PQHDMA block copolymer not only imparts hydrophobic properties to the fabric surface, but also imparts antibacterial properties to the cotton fabric. The other side of the cotton fabric maintains hydrophilic properties. The present invention has a simple process and can achieve both functions in one step, which is conducive to large-scale industrial production. At the same time, it can effectively reduce the amount of rinse water used, reduce energy consumption, lower costs, and mitigate environmental pollution risks.

[0008] As a first aspect of the present invention, a quaternary ammonium block copolymer, PMMA-b-PQHDMA, is invented. Using methyl methacrylate and dimethylaminoethyl methacrylate as basic raw materials, 2-mercapto-S-thiobenzoyl acetic acid, 2,2-azobisisobutyronitrile, 1,4-dioxane and other monomers are added to synthesize the block copolymer (PMMA-b-PDMA) by RAFT polymerization. The quaternary ammonium block copolymer (PMMA-b-PQHDMA) is then synthesized by the quaternization reaction of PMMA-b-PDMA with hexadecane bromide. A large amount of experimental data shows that in the process of preparing the quaternary ammonium block copolymer, when 1.2 grams of methyl methacrylate, 1.21 grams of dimethylaminoethyl methacrylate and 15.3 grams of hexadecane bromide are used, the yield of the quaternary ammonium block copolymer (PMMA-b-PQHDMA) is the highest.

[0009] The PMMA-b-PQHDMA emulsion was prepared by dissolving PMMA-b-PQHDMA in tetrahydrofuran (THF), stirring vigorously at 35°C until dissolved, and then adding distilled water dropwise to obtain a pale white emulsion. The THF was then removed by rotary evaporation at 55°C to obtain the PMMA-b-PQHDMA emulsion.

[0010] In a second aspect, the present invention proposes a finishing method for producing cotton fabric with a Janus structure. PMMA-b-PQHDMA is grafted onto one side of the cotton fabric through atomization, while the other side retains the original cotton fabric properties. This successfully produces an antibacterial and moisture-permeable Janus fabric. The process includes:

[0011] (i) The quaternary ammonium salt block copolymer emulsion is applied to one side of the cotton fabric by the "mist polymerization" method.

[0012] (ii) The cotton fabric in the above (i) is heated at a high temperature for 5 minutes, rinsed and dried to obtain the product of the present invention.

[0013] The "mist polymerization" method involves atomizing a quaternary ammonium block copolymer emulsion containing 0.3% to 0.7% by weight into droplets no larger than 10 microns in diameter. This is then applied to one side of the cotton fabric using an airflow spray. The mist treatment lasts for 3 to 7 minutes, with an optimal duration of 5 minutes. Experimental studies have shown that an emulsion containing less than 0.5% by weight has poor antibacterial efficacy, while an emulsion containing 0.7% by weight has similar antibacterial efficacy to an emulsion containing 0.5% by weight. Therefore, an emulsion containing 0.5% by weight is preferred. A mist treatment time of less than 3 minutes can easily result in too little quaternary ammonium block copolymer grafted onto one side of the cotton fabric, reducing its antibacterial efficacy. A mist treatment time exceeding 7 minutes can cause the mist to penetrate the cotton fabric and reach the other side, making the mist uneven on one side and reducing its antibacterial efficacy. When the droplet diameter is greater than 10 microns, the droplets can penetrate the cotton fabric and reach the other side within the same timeframe, forming a hydrophobic layer on the other side as well, preventing the product from achieving one-way moisture permeability.

[0014] The heating process involves heating the atomized cotton fabric at 100°C to 180°C for 5 minutes, with the optimal temperature being 180°C. After rinsing and drying, the resulting Janus cotton fabric exhibits antibacterial and moisture-permeable properties. Experimental studies have found that heating temperatures below 100°C can lead to a loose connection between the quaternary ammonium salt block copolymer and the cotton fabric surface, resulting in poor washability. Heating temperatures above 180°C can affect the inherent properties of the cotton fabric.

[0015] The Janus fabric obtained by the present invention has directional moisture permeability. When water droplets fall on the surface of the hydrophobic fiber layer, they are subject to two stresses: hydrophobic stress and water droplet gravity. When the water droplet gravity is higher than the hydrophobic stress, the water droplets can overcome the hydrophobic stress and penetrate the hydrophobic layer to enter the surface of the hydrophilic layer. At this time, the water droplets are affected by the capillary force of the hydrophilic layer and the water droplet gravity, effectively promoting the further diffusion of water. On the other hand, when the water droplets fall on the surface of the hydrophilic layer, the capillary force can prompt the water droplets to diffuse rapidly to the hydrophilic layer surface. Because the droplets are fully absorbed and diffused in the hydrophilic layer, combined with the hydrophobic stress of the bottom hydrophobic layer, the droplets are difficult to penetrate the hydrophobic layer, and the material can also obtain excellent waterproof performance. In short, because the fabric has hydrophobicity on one side and hydrophilicity on the other side, it has directional moisture permeability.

[0016] Compared with the prior art, the beneficial effects of the present invention are embodied in:

[0017] (i) The quaternary ammonium salt block copolymer (PMMA-b-PQHDMA) synthesized by the present invention is connected to the surface of cotton fibers by the "mist polymerization" method to form a polymer micro-nano particle coating. This treatment not only gives the fabric antibacterial function, but also enhances the hydrophobicity of one side. (ii) The "mist polymerization" method used in the present invention has minimal effect on the mechanical properties, water vapor permeability and softness of cotton fabrics, maintaining the original comfort of the fabric. (iii) The "mist polymerization" technology is used to give the fabric antibacterial and one-way moisture permeability functions, effectively simplifying the complex process of traditional Janus fabric preparation. Two functions can be achieved in one step, which can effectively reduce the amount of rinsing water used, reduce energy consumption, reduce costs, and alleviate environmental pollution risks. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 Schematic diagram of the single-way water transport mechanism of the antibacterial and moisture-permeable cotton fabric of the present invention;

[0019] Figure 2 Schematic diagram of the method for measuring fabric softness. DETAILED DESCRIPTION

[0020] The present invention is further described below with reference to specific examples. The antibacterial rate of the fabrics obtained in the following examples was determined according to GB / T 20944.3; the water vapor permeability was determined according to GB / T 12704.

[0021] like Figure 2 As shown, the fabric flexibility is measured by the flat ring method. The cotton fabric is cut from the warp and weft directions (40 mm × 160 mm) and a loop is made on the horizontal plane. The lower the bending height of the coil, the better the flexibility.

[0022] The method for determining water absorption is as follows: cut three specimens (10 cm x 10 cm) and place them in a container filled with grade 3 water. Allow the specimens to absorb water naturally. After the specimens are completely immersed in water for five minutes, take them out and hang them to drip water naturally. When the specimens stop dripping, weigh the specimens and record their weight as m. The original specimen mass is recorded as m0. The water absorption rate is

[0023] The tensile strength was measured using an electronic textile tensile tester at a tensile rate of 20 cm / min.

[0024] Example 1

[0025] 1.20 g of methyl methacrylate, 0.10 g of 2-mercapto-S-thiobenzoyl acetic acid, and 0.08 g of 2,2-azobisisobutyronitrile were dissolved in 25 ml of 1,4-dioxane. After deoxygenation with nitrogen for 30 minutes, the solution was stirred at 90°C for 6 hours. After cooling to room temperature, a mixture of 2,2-azobisisobutyronitrile (0.03 g), dimethylaminoethyl methacrylate (1.21 g), and 1,4-dioxane (20 ml) was added. Deoxygenation was repeated for 30 minutes, followed by stirring at 90°C for 6 hours. After cooling to room temperature, the mixture was precipitated with 200 ml of n-hexane to obtain a crude block copolymer (PMMA-b-PDMA). The crude product was dissolved in 50 ml of 1,4-dioxane, precipitated with 200 ml of n-hexane, and dried at 70°C for 3 hours to obtain pink solid particles of the block copolymer PMMA-b-PDMA. 2.0 g of PMMA-b-PDMA and 15.3 g of hexadecane bromide were dissolved in 60 ml of 1,4-dioxane and heated at 45°C for 24 hours. After cooling to room temperature, the 1,4-dioxane was removed by rotary evaporation at 100°C to obtain a crude quaternary ammonium block copolymer. The product was then washed with acetone in a Soxhlet extractor for 6 hours and dried in a vacuum oven at 100°C for 2 hours to obtain white PMMA-b-PQHDMA particles. 0.05 g of PMMA-b-PQHDMA was dissolved in tetrahydrofuran and stirred vigorously at 35°C until dissolved. 10 ml of distilled water was then added dropwise to obtain a pale white emulsion. The tetrahydrofuran was removed by rotary evaporation at 55°C to obtain a PMMA-b-PQHDMA emulsion with a mass content of 0.5%.

[0026] A PMMA-b-PQHDMA emulsion with a mass content of 0.5% was atomized using an air compression atomizer to remove droplets with a particle size greater than 10 μm. The emulsion was sprayed on one side of the original cotton fabric for 3 minutes at a distance of 5 cm. The emulsion was then taken out and heated in an oven at 180°C for 5 minutes, washed with deionized water (50 ml × 3 times), and dried at 100°C for 1 hour to obtain the product of the present invention.

[0027] The product performance characterization results show that the yield of quaternary ammonium salt block copolymer PMMA-b-PQHDMA is 58%, the hydrophobic angle of the atomized side of the fabric is 89°, the hydrophobic angle of the other side is 0°, and the forward water vapor permeability is 5446 g / m 2 / d, reverse moisture permeability is 1825g / m 2 / d, the water absorption rate is 154%, the tensile strength is 33 MPa, the maximum loop height of the fabric after bending is 15.2 mm, the antibacterial rates against Escherichia coli and Staphylococcus aureus are 52.33% and 51.89% respectively, and after washing 250 times and rubbing 1000 times, the rates are 51.20% and 50.34% respectively.

[0028] Example 2

[0029] 1.20 g of methyl methacrylate, 0.10 g of 2-mercapto-S-thiobenzoyl acetic acid, and 0.08 g of 2,2-azobisisobutyronitrile were dissolved in 25 ml of 1,4-dioxane. After deoxygenation with nitrogen for 30 minutes, the solution was stirred at 90°C for 6 hours. After cooling to room temperature, a mixture of 2,2-azobisisobutyronitrile (0.03 g), dimethylaminoethyl methacrylate (1.21 g), and 1,4-dioxane (20 ml) was added. Deoxygenation was repeated for 30 minutes, followed by stirring at 90°C for 6 hours. After cooling to room temperature, the mixture was precipitated with 200 ml of n-hexane to obtain a crude block copolymer (PMMA-b-PDMA). The crude product was dissolved in 50 ml of 1,4-dioxane, precipitated with 200 ml of n-hexane, and dried at 70°C for 3 hours to obtain pink solid particles of the block copolymer PMMA-b-PDMA. 2.0 g of PMMA-b-PDMA and 15.3 g of hexadecane bromide were dissolved in 60 ml of 1,4-dioxane and heated at 45°C for 24 hours. After cooling to room temperature, the 1,4-dioxane was removed by rotary evaporation at 100°C to obtain a crude quaternary ammonium block copolymer. The product was then washed with acetone in a Soxhlet extractor for 6 hours and dried in a vacuum oven at 100°C for 2 hours to obtain white PMMA-b-PQHDMA particles. 0.05 g of PMMA-b-PQHDMA was dissolved in tetrahydrofuran and stirred vigorously at 35°C until dissolved. 10 ml of distilled water was then added dropwise to obtain a pale white emulsion. The tetrahydrofuran was removed by rotary evaporation at 55°C to obtain a PMMA-b-PQHDMA emulsion with a mass content of 0.5%.

[0030] A PMMA-b-PQHDMA emulsion with a mass content of 0.5% was atomized using an air compression atomizer to remove droplets with a particle size greater than 10 μm. The emulsion was sprayed on one side of the original cotton fabric for 4 minutes at a distance of 5 cm. The emulsion was then taken out and heated in an oven at 180°C for 5 minutes, washed with deionized water (50 ml × 3 times), and dried at 100°C for 1 hour to obtain the product of the present invention.

[0031] The product performance characterization results show that the yield of quaternary ammonium salt block copolymer PMMA-b-PQHDMA is 58%, the hydrophobic angle of the atomized side of the fabric is 115°, the hydrophobic angle of the other side is 0°, and the forward water vapor permeability is 8421g / m 2 / d, reverse moisture permeability is 1128g / m 2 / d, the water absorption rate is 104%, the tensile strength is 32 MPa, the maximum loop height of the fabric after bending is 15.5 mm, the antibacterial rates against Escherichia coli and Staphylococcus aureus are 86.76% and 89.67% respectively, and the antibacterial rates after washing 250 times and rubbing 1000 times are 85.87% and 88.47% respectively.

[0032] Example 3

[0033] 1.20 g of methyl methacrylate, 0.10 g of 2-mercapto-S-thiobenzoyl acetic acid, and 0.08 g of 2,2-azobisisobutyronitrile were dissolved in 25 ml of 1,4-dioxane. After deoxygenation with nitrogen for 30 minutes, the solution was stirred at 90°C for 6 hours. After cooling to room temperature, a mixture of 2,2-azobisisobutyronitrile (0.03 g), dimethylaminoethyl methacrylate (1.21 g), and 1,4-dioxane (20 ml) was added. Deoxygenation was repeated for 30 minutes, followed by stirring at 90°C for 6 hours. After cooling to room temperature, the mixture was precipitated with 200 ml of n-hexane to obtain a crude block copolymer (PMMA-b-PDMA). The crude product was dissolved in 50 ml of 1,4-dioxane, precipitated with 200 ml of n-hexane, and dried at 70°C for 3 hours to obtain pink solid particles of the block copolymer PMMA-b-PDMA. 2.0 g of PMMA-b-PDMA and 15.3 g of hexadecane bromide were dissolved in 60 ml of 1,4-dioxane and heated at 45°C for 24 hours. After cooling to room temperature, the 1,4-dioxane was removed by rotary evaporation at 100°C to obtain a crude quaternary ammonium block copolymer. The product was then washed with acetone in a Soxhlet extractor for 6 hours and dried in a vacuum oven at 100°C for 2 hours to obtain white PMMA-b-PQHDMA particles. 0.05 g of PMMA-b-PQHDMA was dissolved in tetrahydrofuran and stirred vigorously at 35°C until dissolved. 10 ml of distilled water was then added dropwise to obtain a pale white emulsion. The tetrahydrofuran was removed by rotary evaporation at 55°C to obtain a PMMA-b-PQHDMA emulsion with a mass content of 0.5%.

[0034] A PMMA-b-PQHDMA emulsion with a mass content of 0.5% was atomized using an air compression atomizer to remove droplets with a particle size greater than 10 μm. The emulsion was sprayed on one side of the original cotton fabric for 5 minutes at a distance of 5 cm. The emulsion was taken out and heated in an oven at 180°C for 5 minutes, washed with deionized water (50 ml × 3 times), and dried at 100°C for 1 hour to obtain the product of the present invention.

[0035] The product performance characterization results show that the yield of quaternary ammonium salt block copolymer PMMA-b-PQHDMA is 58%, the hydrophobic angle of the atomized side of the fabric is 130°, the hydrophobic angle of the other side is 0°, and the forward water vapor permeability is 9567g / m 2 / d, reverse moisture permeability is 1064g / m 2 / d, the water absorption rate is 95%, the tensile strength is 32 MPa, the maximum loop height of the fabric after bending is 15.8 mm, the antibacterial rates against Escherichia coli and Staphylococcus aureus are 99.99% and 99.99% respectively, and after washing 250 times and rubbing 1000 times, the rates are 99.28% and 99.17% respectively.

[0036] Example 4

[0037] 1.20 g of methyl methacrylate, 0.10 g of 2-mercapto-S-thiobenzoyl acetic acid, and 0.08 g of 2,2-azobisisobutyronitrile were dissolved in 25 ml of 1,4-dioxane. After deoxygenation with nitrogen for 30 minutes, the solution was stirred at 90°C for 6 hours. After cooling to room temperature, a mixture of 2,2-azobisisobutyronitrile (0.03 g), dimethylaminoethyl methacrylate (1.21 g), and 1,4-dioxane (20 ml) was added. Deoxygenation was repeated for 30 minutes, followed by stirring at 90°C for 6 hours. After cooling to room temperature, the mixture was precipitated with 200 ml of n-hexane to obtain a crude block copolymer (PMMA-b-PDMA). The crude product was dissolved in 50 ml of 1,4-dioxane, precipitated with 200 ml of n-hexane, and dried at 70°C for 3 hours to obtain pink solid particles of the block copolymer PMMA-b-PDMA. 2.0 g of PMMA-b-PDMA and 15.3 g of hexadecane bromide were dissolved in 60 ml of 1,4-dioxane and heated at 45°C for 24 hours. After cooling to room temperature, the 1,4-dioxane was removed by rotary evaporation at 100°C to obtain a crude quaternary ammonium block copolymer. The product was then washed with acetone in a Soxhlet extractor for 6 hours and dried in a vacuum oven at 100°C for 2 hours to obtain white PMMA-b-PQHDMA particles. 0.05 g of PMMA-b-PQHDMA was dissolved in tetrahydrofuran and stirred vigorously at 35°C until dissolved. 10 ml of distilled water was then added dropwise to obtain a pale white emulsion. The tetrahydrofuran was removed by rotary evaporation at 55°C to obtain a PMMA-b-PQHDMA emulsion with a mass content of 0.5%.

[0038] A PMMA-b-PQHDMA emulsion with a mass content of 0.5% was atomized using an air compression atomizer to remove droplets with a particle size greater than 10 μm. The emulsion was sprayed on one side of the original cotton fabric for 6 minutes at a distance of 5 cm. The emulsion was then taken out and heated in an oven at 180°C for 5 minutes, washed with deionized water (50 ml × 3 times), and dried at 100°C for 1 hour to obtain the product of the present invention.

[0039] The product performance characterization results show that the yield of quaternary ammonium salt block copolymer PMMA-b-PQHDMA is 58%, the hydrophobic angle of the atomized side of the fabric is 131°, the hydrophobic angle of the other side is 104°, and the forward water vapor permeability is 2527g / m 2 / d, reverse moisture permeability is 2176g / m 2 / d, the water absorption rate is 93%, the tensile strength is 31 MPa, the maximum loop height of the fabric after bending is 16.0 mm, the antibacterial rates against Escherichia coli and Staphylococcus aureus are 99.45% and 99.66% respectively, and after washing 250 times and rubbing 1000 times, the rates are 98.40% and 98.63% respectively.

[0040] Example 5

[0041] 1.20 g of methyl methacrylate, 0.10 g of 2-mercapto-S-thiobenzoyl acetic acid, and 0.08 g of 2,2-azobisisobutyronitrile were dissolved in 25 ml of 1,4-dioxane. After deoxygenation with nitrogen for 30 minutes, the solution was stirred at 90°C for 6 hours. After cooling to room temperature, a mixture of 2,2-azobisisobutyronitrile (0.03 g), dimethylaminoethyl methacrylate (1.21 g), and 1,4-dioxane (20 ml) was added. Deoxygenation was repeated for 30 minutes, followed by stirring at 90°C for 6 hours. After cooling to room temperature, the mixture was precipitated with 200 ml of n-hexane to obtain a crude block copolymer (PMMA-b-PDMA). The crude product was dissolved in 50 ml of 1,4-dioxane, precipitated with 200 ml of n-hexane, and dried at 70°C for 3 hours to obtain pink solid particles of the block copolymer PMMA-b-PDMA. 2.0 g of PMMA-b-PDMA and 15.3 g of hexadecane bromide were dissolved in 60 ml of 1,4-dioxane and heated at 45°C for 24 hours. After cooling to room temperature, the 1,4-dioxane was removed by rotary evaporation at 100°C to obtain a crude quaternary ammonium block copolymer. The product was then washed with acetone in a Soxhlet extractor for 6 hours and dried in a vacuum oven at 100°C for 2 hours to obtain white PMMA-b-PQHDMA particles. 0.05 g of PMMA-b-PQHDMA was dissolved in tetrahydrofuran and stirred vigorously at 35°C until dissolved. 10 ml of distilled water was then added dropwise to obtain a pale white emulsion. The tetrahydrofuran was removed by rotary evaporation at 55°C to obtain a PMMA-b-PQHDMA emulsion with a mass content of 0.5%.

[0042] A PMMA-b-PQHDMA emulsion with a mass content of 0.5% was atomized using an air compression atomizer to remove droplets with a particle size greater than 10 μm. The emulsion was sprayed on one side of the original cotton fabric for 7 minutes at a distance of 5 cm. The emulsion was then taken out and heated in an oven at 180°C for 5 minutes, washed with deionized water (50 ml × 3 times), and dried at 100°C for 1 hour to obtain the product of the present invention.

[0043] The product performance characterization results show that the yield of quaternary ammonium salt block copolymer PMMA-b-PQHDMA is 58%, the hydrophobic angle of the atomized side of the fabric is 130°, the hydrophobic angle of the other side is 113°, and the forward water vapor permeability is 2346g / m 2 / d, reverse moisture permeability is 2078g / m 2 / d, the water absorption rate is 90%, the tensile strength is 32 MPa, the maximum loop height of the fabric after bending is 16.3 mm, the antibacterial rates against Escherichia coli and Staphylococcus aureus are 98.62% and 98.78% respectively, and after washing 250 times and rubbing 1000 times, the rates are 98.00% and 97.74% respectively.

[0044] Example 6

[0045] 1.20 g of methyl methacrylate, 0.10 g of 2-mercapto-S-thiobenzoyl acetic acid, and 0.08 g of 2,2-azobisisobutyronitrile were dissolved in 25 ml of 1,4-dioxane. After deoxygenation with nitrogen for 30 minutes, the solution was stirred at 90°C for 6 hours. After cooling to room temperature, a mixture of 2,2-azobisisobutyronitrile (0.03 g), dimethylaminoethyl methacrylate (1.21 g), and 1,4-dioxane (20 ml) was added. Deoxygenation was repeated for 30 minutes, followed by stirring at 90°C for 6 hours. After cooling to room temperature, the mixture was precipitated with 200 ml of n-hexane to obtain a crude block copolymer (PMMA-b-PDMA). The crude product was dissolved in 50 ml of 1,4-dioxane, precipitated with 200 ml of n-hexane, and dried at 70°C for 3 hours to obtain pink solid particles of the block copolymer PMMA-b-PDMA. 2.0 g of PMMA-b-PDMA and 15.3 g of hexadecane bromide were dissolved in 60 ml of 1,4-dioxane and heated at 45°C for 24 hours. After cooling to room temperature, the 1,4-dioxane was removed by rotary evaporation at 100°C to obtain a crude quaternary ammonium block copolymer. The product was then washed with acetone in a Soxhlet extractor for 6 hours and dried in a vacuum oven at 100°C for 2 hours to obtain white PMMA-b-PQHDMA particles. 0.03 g of PMMA-b-PQHDMA was dissolved in tetrahydrofuran and stirred vigorously at 35°C until dissolved. 10 ml of distilled water was then added dropwise to obtain a pale white emulsion. The tetrahydrofuran was removed by rotary evaporation at 55°C to obtain a PMMA-b-PQHDMA emulsion with a mass content of 0.3%.

[0046] A PMMA-b-PQHDMA emulsion with a mass content of 0.3% was atomized using an air compression atomizer to remove droplets with a particle size greater than 10 μm. The emulsion was sprayed on one side of the original cotton fabric for 5 minutes at a distance of 5 cm. The emulsion was then taken out and heated in an oven at 170°C for 5 minutes, washed with deionized water (50 ml × 3 times), and dried at 100°C for 1 hour to obtain the product of the present invention.

[0047] The product performance characterization results show that the yield of quaternary ammonium salt block copolymer PMMA-b-PQHDMA is 58%, the hydrophobic angle of the atomized side of the fabric is 110°, the hydrophobic angle of the other side is 0°, and the forward water vapor permeability is 7454g / m 2 / d, reverse moisture permeability is 1894g / m 2 / d, the water absorption rate is 117%, the tensile strength is 33 MPa, the maximum loop height of the fabric after bending is 15.6 mm, the antibacterial rates against Escherichia coli and Staphylococcus aureus are 98.76% and 98.78% respectively, and after washing 250 times and rubbing 1000 times, the rates are 97.00% and 97.23% respectively.

[0048] Example 7

[0049] 1.20 g of methyl methacrylate, 0.10 g of 2-mercapto-S-thiobenzoyl acetic acid, and 0.08 g of 2,2-azobisisobutyronitrile were dissolved in 25 ml of 1,4-dioxane. After deoxygenation with nitrogen for 30 minutes, the solution was stirred at 90°C for 6 hours. After cooling to room temperature, a mixture of 2,2-azobisisobutyronitrile (0.03 g), dimethylaminoethyl methacrylate (1.21 g), and 1,4-dioxane (20 ml) was added. Deoxygenation was repeated for 30 minutes, followed by stirring at 90°C for 6 hours. After cooling to room temperature, the mixture was precipitated with 200 ml of n-hexane to obtain a crude block copolymer (PMMA-b-PDMA). The crude product was dissolved in 50 ml of 1,4-dioxane, precipitated with 200 ml of n-hexane, and dried at 70°C for 3 hours to obtain pink solid particles of the block copolymer PMMA-b-PDMA. 2.0 g of PMMA-b-PDMA and 15.3 g of hexadecane bromide were dissolved in 60 ml of 1,4-dioxane and heated at 45°C for 24 hours. After cooling to room temperature, the 1,4-dioxane was removed by rotary evaporation at 100°C to obtain a crude quaternary ammonium block copolymer. The product was then washed with acetone in a Soxhlet extractor for 6 hours and dried in a vacuum oven at 100°C for 2 hours to obtain white PMMA-b-PQHDMA particles. 0.05 g of PMMA-b-PQHDMA was dissolved in tetrahydrofuran and stirred vigorously at 35°C until dissolved. 10 ml of distilled water was then added dropwise to obtain a pale white emulsion. The tetrahydrofuran was removed by rotary evaporation at 55°C to obtain a PMMA-b-PQHDMA emulsion with a mass content of 0.5%.

[0050] A PMMA-b-PQHDMA emulsion with a mass content of 0.5% was atomized using an air compression atomizer to remove droplets with a particle size greater than 10 μm. The emulsion was sprayed on one side of the original cotton fabric for 5 minutes at a distance of 5 cm. The emulsion was then taken out and heated in an oven at 170°C for 5 minutes, washed with deionized water (50 ml × 3 times), and dried at 100°C for 1 hour to obtain the product of the present invention.

[0051] The product performance characterization results show that the yield of quaternary ammonium salt block copolymer PMMA-b-PQHDMA is 58%, the hydrophobic angle of the atomized side of the fabric is 129°, the hydrophobic angle of the other side is 0°, and the forward water vapor permeability is 9434g / m 2 / d, reverse moisture permeability is 1168g / m 2 / d, the water absorption rate is 95%, the tensile strength is 31 MPa, the maximum loop height of the fabric after bending is 15.7 mm, the antibacterial rates against Escherichia coli and Staphylococcus aureus are 99.73% and 99.68% respectively, and after washing 250 times and rubbing 1000 times, the rates are 98.34% and 98.10% respectively.

[0052] Example 8

[0053] 1.20 g of methyl methacrylate, 0.10 g of 2-mercapto-S-thiobenzoyl acetic acid, and 0.08 g of 2,2-azobisisobutyronitrile were dissolved in 25 ml of 1,4-dioxane. After deoxygenation with nitrogen for 30 minutes, the solution was stirred at 90°C for 6 hours. After cooling to room temperature, a mixture of 2,2-azobisisobutyronitrile (0.03 g), dimethylaminoethyl methacrylate (1.21 g), and 1,4-dioxane (20 ml) was added. Deoxygenation was repeated for 30 minutes, followed by stirring at 90°C for 6 hours. After cooling to room temperature, the mixture was precipitated with 200 ml of n-hexane to obtain a crude block copolymer (PMMA-b-PDMA). The crude product was dissolved in 50 ml of 1,4-dioxane, precipitated with 200 ml of n-hexane, and dried at 70°C for 3 hours to obtain pink solid particles of the block copolymer PMMA-b-PDMA. 2.0 g of PMMA-b-PDMA and 15.3 g of hexadecane bromide were dissolved in 60 ml of 1,4-dioxane and heated at 45°C for 24 hours. After cooling to room temperature, the 1,4-dioxane was removed by rotary evaporation at 100°C to obtain a crude quaternary ammonium block copolymer. The product was then washed with acetone in a Soxhlet extractor for 6 hours and dried in a vacuum oven at 100°C for 2 hours to obtain white PMMA-b-PQHDMA particles. 0.07 g of PMMA-b-PQHDMA was dissolved in tetrahydrofuran and stirred vigorously at 35°C until dissolved. 10 ml of distilled water was then added dropwise to obtain a pale white emulsion. The tetrahydrofuran was removed by rotary evaporation at 55°C to obtain a PMMA-b-PQHDMA emulsion with a mass content of 0.7%.

[0054] A PMMA-b-PQHDMA emulsion with a mass content of 0.7% was atomized using an air compression atomizer to remove droplets with a particle size greater than 10 μm. The emulsion was sprayed on one side of the original cotton fabric for 5 minutes at a distance of 5 cm. The emulsion was then taken out and heated in an oven at 170°C for 5 minutes, washed with deionized water (50 ml × 3 times), and dried at 100°C for 1 hour to obtain the product of the present invention.

[0055] The product performance characterization results show that the yield of quaternary ammonium salt block copolymer PMMA-b-PQHDMA is 58%, the hydrophobic angle of the atomized side of the fabric is 120°, the hydrophobic angle of the other side is 0°, and the forward water vapor permeability is 9566g / m 2 / d, reverse moisture permeability is 1176g / m 2 / d, the water absorption rate is 94%, the tensile strength is 32 MPa, the maximum loop height of the fabric after bending is 15.8 mm, the antibacterial rates against Escherichia coli and Staphylococcus aureus are 99.86% and 99.87% respectively, and after washing 250 times and rubbing 1000 times, the rates are 98.57% and 98.34% respectively.

[0056] Example 9

[0057] 1.20 g of methyl methacrylate, 0.10 g of 2-mercapto-S-thiobenzoyl acetic acid, and 0.08 g of 2,2-azobisisobutyronitrile were dissolved in 25 ml of 1,4-dioxane. After deoxygenation with nitrogen for 30 minutes, the solution was stirred at 90°C for 6 hours. After cooling to room temperature, a mixture of 2,2-azobisisobutyronitrile (0.03 g), dimethylaminoethyl methacrylate (1.21 g), and 1,4-dioxane (20 ml) was added. Deoxygenation was repeated for 30 minutes, followed by stirring at 90°C for 6 hours. After cooling to room temperature, the mixture was precipitated with 200 ml of n-hexane to obtain a crude block copolymer (PMMA-b-PDMA). The crude product was dissolved in 50 ml of 1,4-dioxane, precipitated with 200 ml of n-hexane, and dried at 70°C for 3 hours to obtain pink solid particles of the block copolymer PMMA-b-PDMA. 2.0 g of PMMA-b-PDMA and 15.3 g of hexadecane bromide were dissolved in 60 ml of 1,4-dioxane and heated at 45°C for 24 hours. After cooling to room temperature, the 1,4-dioxane was removed by rotary evaporation at 100°C to obtain a crude quaternary ammonium block copolymer. The product was then washed with acetone in a Soxhlet extractor for 6 hours and dried in a vacuum oven at 100°C for 2 hours to obtain white PMMA-b-PQHDMA particles. 0.04 g of PMMA-b-PQHDMA was dissolved in tetrahydrofuran and stirred vigorously at 35°C until dissolved. 10 ml of distilled water was then added dropwise to obtain a pale white emulsion. The tetrahydrofuran was removed by rotary evaporation at 55°C to obtain a PMMA-b-PQHDMA emulsion with a mass content of 0.4%.

[0058] A PMMA-b-PQHDMA emulsion with a mass content of 0.4% was atomized using an air compression atomizer to remove droplets with a particle size greater than 10 μm. The emulsion was sprayed on one side of the original cotton fabric for 5 minutes at a distance of 5 cm. The emulsion was taken out and heated in an oven at 100° C. for 5 minutes, washed with deionized water (50 ml × 3 times), and dried at 100° C. for 1 hour to obtain the product of the present invention.

[0059] The product performance characterization results show that the yield of quaternary ammonium salt block copolymer PMMA-b-PQHDMA is 58%, the hydrophobic angle of the atomized side of the fabric is 70°, the hydrophobic angle of the other side is 0°, and the forward water vapor permeability is 4537g / m 2 / d, reverse moisture permeability is 2345g / m2 / d, the water absorption rate is 160%, the tensile strength is 31 MPa, the maximum loop height of the fabric after bending is 15.2 mm, the antibacterial rates against Escherichia coli and Staphylococcus aureus are 53.44% and 54.32% respectively, and the antibacterial rates after washing 250 times and rubbing 1000 times are 30.44% and 31.57% respectively.

[0060] Example 10

[0061] 1.20 g of methyl methacrylate, 0.10 g of 2-mercapto-S-thiobenzoyl acetic acid, and 0.08 g of 2,2-azobisisobutyronitrile were dissolved in 25 ml of 1,4-dioxane. After deoxygenation with nitrogen for 30 minutes, the solution was stirred at 90°C for 6 hours. After cooling to room temperature, a mixture of 2,2-azobisisobutyronitrile (0.03 g), dimethylaminoethyl methacrylate (1.21 g), and 1,4-dioxane (20 ml) was added. Deoxygenation was repeated for 30 minutes, followed by stirring at 90°C for 6 hours. After cooling to room temperature, the mixture was precipitated with 200 ml of n-hexane to obtain a crude block copolymer (PMMA-b-PDMA). The crude product was dissolved in 50 ml of 1,4-dioxane, precipitated with 200 ml of n-hexane, and dried at 70°C for 3 hours to obtain pink solid particles of the block copolymer PMMA-b-PDMA. 2.0 g of PMMA-b-PDMA and 15.3 g of hexadecane bromide were dissolved in 60 ml of 1,4-dioxane and heated at 45°C for 24 hours. After cooling to room temperature, the 1,4-dioxane was removed by rotary evaporation at 100°C to obtain a crude quaternary ammonium block copolymer. The product was then washed with acetone in a Soxhlet extractor for 6 hours and dried in a vacuum oven at 100°C for 2 hours to obtain white PMMA-b-PQHDMA particles. 0.04 g of PMMA-b-PQHDMA was dissolved in tetrahydrofuran and stirred vigorously at 35°C until dissolved. 10 ml of distilled water was then added dropwise to obtain a pale white emulsion. The tetrahydrofuran was removed by rotary evaporation at 55°C to obtain a PMMA-b-PQHDMA emulsion with a mass content of 0.4%.

[0062] A PMMA-b-PQHDMA emulsion with a mass content of 0.4% was atomized using an air compression atomizer to remove droplets with a particle size greater than 10 μm. The emulsion was sprayed on one side of the original cotton fabric for 5 minutes at a distance of 5 cm. The emulsion was then taken out and heated in an oven at 150° C. for 5 minutes, washed with deionized water (50 ml × 3 times), and dried at 100° C. for 1 hour to obtain the product of the present invention.

[0063] The product performance characterization results show that the yield of quaternary ammonium salt block copolymer PMMA-b-PQHDMA is 58%, the hydrophobic angle of the atomized side of the fabric is 107°, the hydrophobic angle of the other side is 0°, and the forward water vapor permeability is 7542g / m 2 / d, reverse moisture permeability is 1570g / m 2 / d, the water absorption rate is 113%, the tensile strength is 32 MPa, the maximum loop height of the fabric after bending is 15.4 mm, the antibacterial rates against Escherichia coli and Staphylococcus aureus are 78.04% and 79.54% respectively, and the antibacterial rates after washing 250 times and rubbing 1000 times are 56.78% and 58.01% respectively.

[0064] Example 11

[0065] 1.20 g of methyl methacrylate, 0.10 g of 2-mercapto-S-thiobenzoyl acetic acid, and 0.08 g of 2,2-azobisisobutyronitrile were dissolved in 25 ml of 1,4-dioxane. After deoxygenation with nitrogen for 30 minutes, the solution was stirred at 90°C for 6 hours. After cooling to room temperature, a mixture of 2,2-azobisisobutyronitrile (0.03 g), dimethylaminoethyl methacrylate (1.21 g), and 1,4-dioxane (20 ml) was added. Deoxygenation was repeated for 30 minutes, followed by stirring at 90°C for 6 hours. After cooling to room temperature, the mixture was precipitated with 200 ml of n-hexane to obtain a crude block copolymer (PMMA-b-PDMA). The crude product was dissolved in 50 ml of 1,4-dioxane, precipitated with 200 ml of n-hexane, and dried at 70°C for 3 hours to obtain pink solid particles of the block copolymer PMMA-b-PDMA. 2.0 g of PMMA-b-PDMA and 15.3 g of hexadecane bromide were dissolved in 60 ml of 1,4-dioxane and heated at 45°C for 24 hours. After cooling to room temperature, the 1,4-dioxane was removed by rotary evaporation at 100°C to obtain a crude quaternary ammonium block copolymer. The product was then washed with acetone in a Soxhlet extractor for 6 hours and dried in a vacuum oven at 100°C for 2 hours to obtain white PMMA-b-PQHDMA particles. 0.04 g of PMMA-b-PQHDMA was dissolved in tetrahydrofuran and stirred vigorously at 35°C until dissolved. 10 ml of distilled water was then added dropwise to obtain a pale white emulsion. The tetrahydrofuran was removed by rotary evaporation at 55°C to obtain a PMMA-b-PQHDMA emulsion with a mass content of 0.4%.

[0066] A PMMA-b-PQHDMA emulsion with a mass content of 0.4% was atomized using an air compression atomizer to remove droplets with a particle size greater than 10 μm. The emulsion was sprayed on one side of the original cotton fabric for 5 minutes at a distance of 3 cm. The emulsion was then taken out and heated in an oven at 180°C for 5 minutes, washed with deionized water (50 ml × 3 times), and dried at 100°C for 1 hour to obtain the product of the present invention.

[0067] The product performance characterization results show that the yield of quaternary ammonium salt block copolymer PMMA-b-PQHDMA is 58%, the hydrophobic angle of the atomized side of the fabric is 115°, the hydrophobic angle of the other side is 0°, and the forward water vapor permeability is 8551g / m 2 / d, reverse moisture permeability is 1149g / m 2 / d, the water absorption rate is 105%, the tensile strength is 31 MPa, the maximum loop height of the fabric after bending is 15.7 mm, the antibacterial rates against Escherichia coli and Staphylococcus aureus are 99.19% and 99.23% respectively, and after washing 250 times and rubbing 1000 times, the rates are 97.88% and 97.69% respectively.

[0068] Example 12

[0069] 1.10 g of methyl methacrylate, 0.10 g of 2-mercapto-S-thiobenzoyl acetic acid, and 0.08 g of 2,2-azobisisobutyronitrile were dissolved in 25 ml of 1,4-dioxane. After deoxygenation with nitrogen for 30 minutes, the solution was stirred at 90°C for 6 hours. After cooling to room temperature, a mixture of 2,2-azobisisobutyronitrile (0.03 g), dimethylaminoethyl methacrylate (1.21 g), and 1,4-dioxane (20 ml) was added. Deoxygenation was repeated for 30 minutes, followed by stirring at 90°C for 6 hours. After cooling to room temperature, the mixture was precipitated with 200 ml of n-hexane to obtain a crude block copolymer (PMMA-b-PDMA). The crude product was dissolved in 50 ml of 1,4-dioxane, precipitated with 200 ml of n-hexane, and dried at 70°C for 3 hours to obtain pink solid particles of the block copolymer PMMA-b-PDMA. 2.0 g of PMMA-b-PDMA and 14 g of hexadecane bromide were dissolved in 60 ml of 1,4-dioxane and heated at 45°C for 24 hours. After cooling to room temperature, the 1,4-dioxane was removed by rotary evaporation at 100°C to obtain a crude quaternary ammonium block copolymer. The product was then washed with acetone in a Soxhlet extractor for 6 hours and dried in a vacuum oven at 100°C for 2 hours to obtain white PMMA-b-PQHDMA particles. 0.05 g of PMMA-b-PQHDMA was dissolved in tetrahydrofuran and stirred vigorously at 35°C until dissolved. 10 ml of distilled water was then added dropwise to obtain a pale white emulsion. The tetrahydrofuran was removed by rotary evaporation at 55°C to obtain a PMMA-b-PQHDMA emulsion with a mass content of 0.5%.

[0070] A PMMA-b-PQHDMA emulsion with a mass content of 0.5% was atomized using an air compression atomizer to remove droplets with a particle size greater than 10 μm. The emulsion was sprayed on one side of the original cotton fabric for 5 minutes at a distance of 5 cm. The emulsion was taken out and heated in an oven at 180°C for 5 minutes, washed with deionized water (50 ml × 3 times), and dried at 100°C for 1 hour to obtain the product of the present invention.

[0071] The product performance characterization results show that the yield of quaternary ammonium salt block copolymer PMMA-b-PQHDMA is 40%, the hydrophobic angle of the atomized side of the fabric is 130°, the hydrophobic angle of the other side is 0°, and the forward water vapor permeability is 9561g / m 2 / d, reverse moisture permeability is 1068g / m 2 / d, the water absorption rate is 96%, the tensile strength is 32 MPa, the maximum loop height of the fabric after bending is 15.8 mm, the antibacterial rates against Escherichia coli and Staphylococcus aureus are 99.89% and 98.66% respectively, and the antibacterial rates after washing 250 times and rubbing 1000 times are 95.35% and 94.35% respectively.

[0072] Example 13

[0073] 1.20 g of methyl methacrylate, 0.10 g of 2-mercapto-S-thiobenzoyl acetic acid, and 0.08 g of 2,2-azobisisobutyronitrile were dissolved in 25 ml of 1,4-dioxane. After deoxygenation with nitrogen for 30 minutes, the solution was stirred at 90°C for 6 hours. After cooling to room temperature, a mixture of 2,2-azobisisobutyronitrile (0.03 g), dimethylaminoethyl methacrylate (1.21 g), and 1,4-dioxane (20 ml) was added. Deoxygenation was repeated for 30 minutes, followed by stirring at 90°C for 6 hours. After cooling to room temperature, the mixture was precipitated with 200 ml of n-hexane to obtain a crude block copolymer (PMMA-b-PDMA). The crude product was dissolved in 50 ml of 1,4-dioxane, precipitated with 200 ml of n-hexane, and dried at 70°C for 3 hours to obtain pink solid particles of the block copolymer PMMA-b-PDMA. 2.0 g of PMMA-b-PDMA and 14 g of hexadecane bromide were dissolved in 60 ml of 1,4-dioxane and heated at 45°C for 24 hours. After cooling to room temperature, the 1,4-dioxane was removed by rotary evaporation at 100°C to obtain a crude quaternary ammonium block copolymer. The product was then washed with acetone in a Soxhlet extractor for 6 hours and dried in a vacuum oven at 100°C for 2 hours to obtain white PMMA-b-PQHDMA particles. 0.05 g of PMMA-b-PQHDMA was dissolved in tetrahydrofuran and stirred vigorously at 35°C until dissolved. 10 ml of distilled water was then added dropwise to obtain a pale white emulsion. The tetrahydrofuran was removed by rotary evaporation at 55°C to obtain a PMMA-b-PQHDMA emulsion with a mass content of 0.5%.

[0074] A PMMA-b-PQHDMA emulsion with a mass content of 0.5% was atomized using an air compression atomizer to remove droplets with a particle size greater than 10 μm. The emulsion was sprayed on one side of the original cotton fabric for 5 minutes at a distance of 5 cm. The emulsion was taken out and heated in an oven at 180°C for 5 minutes, washed with deionized water (50 ml × 3 times), and dried at 100°C for 1 hour to obtain the product of the present invention.

[0075] The product performance characterization results show that the yield of the quaternary ammonium salt block copolymer PMMA-b-PQHDMA is 55%, the hydrophobic angle of one side of the fabric is 130°, the hydrophobic angle of the other side is 0°, the positive moisture permeability is 9560 g / m 2 / d, the reverse moisture permeability is 1069 g / m 2 / d, the water absorption is 97%, the tensile strength is 32 MPa, the maximum loop height of the fabric after bending is 15.7 mm, the antibacterial rate of E. coli and S. aureus is 99.67% and 99.68% respectively, and after washing for 250 times and 1000 times rubbing, it is 98.98% and 98.00% respectively.

[0076] Example 14

[0077] Dissolve 1.30 g of methyl methacrylate, 0.10 g of 2-mercapto-S-thiobenzoyl acetic acid and 0.08 g of 2,2-azobisisobutyronitrile in 25 ml of 1,4-dioxane solution, after 30 minutes of nitrogen deoxygenation treatment, the solution is stirred at 90°C for 6 hours, after the solution is cooled to room temperature, add the mixed solution of 2,2-azobisisobutyronitrile (0.03 g), dimethylaminoethyl methacrylate (1.21 g) and 1,4-dioxane (20 ml) which has been prepared. After deoxygenation treatment for 30 minutes again, after stirring at 90°C for 6 hours, cool to room temperature, precipitate with 200 ml of n-hexane to obtain the crude block copolymer (PMMA-b-PDMA). Dissolve the crude product in 50 ml of 1,4-dioxane, precipitate with 200 ml of n-hexane, dry at 70°C for 3 hours to obtain the block copolymer PMMA-b-PDMA pink solid particles. Dissolve 2.0 g of PMMA-b-PDMA and 14 g of bromohexadecane in 60 ml of 1,4-dioxane, heat at 45°C for 24 hours, cool to room temperature, remove 1,4-dioxane by rotary evaporation at 100°C to obtain the crude quaternary ammonium salt block copolymer, then wash with acetone for 6 hours in a Soxhlet extractor, dry in a vacuum oven at 100°C for 2 hours to obtain white PMMA-b-PQHDMA particles. Dissolve 0.05 g of PMMA-b-PQHDMA in tetrahydrofuran, stir vigorously at 35°C until dissolved, then add 10 ml of distilled water dropwise to obtain a light white emulsion. After removing tetrahydrofuran by rotary evaporation at 55°C, an emulsion with a mass content of 0.5% PMMA-b-PQHDMA is obtained.

[0078] A PMMA-b-PQHDMA emulsion with a mass content of 0.5% was atomized using an air compression atomizer to remove droplets with a particle size greater than 10 μm. The emulsion was sprayed on one side of the original cotton fabric for 5 minutes at a distance of 5 cm. The emulsion was taken out and heated in an oven at 180°C for 5 minutes, washed with deionized water (50 ml × 3 times), and dried at 100°C for 1 hour to obtain the product of the present invention.

[0079] The product performance characterization results show that the yield of quaternary ammonium salt block copolymer PMMA-b-PQHDMA is 45%, the hydrophobic angle of the atomized side of the fabric is 130°, the hydrophobic angle of the other side is 0°, and the forward water vapor permeability is 9562g / m 2 / d, reverse moisture permeability is 1067g / m 2 / d, the water absorption rate is 96%, the tensile strength is 32 MPa, the maximum loop height of the fabric after bending is 15.8 mm, the antibacterial rates against Escherichia coli and Staphylococcus aureus are 99.91% and 99.75% respectively, and after washing 250 times and rubbing 1000 times, the rates are 96.33% and 96.24% respectively.

[0080] Example 15

[0081] 1.20 g of methyl methacrylate, 0.10 g of 2-mercapto-S-thiobenzoyl acetic acid, and 0.08 g of 2,2-azobisisobutyronitrile were dissolved in 25 ml of 1,4-dioxane. After deoxygenation with nitrogen for 30 minutes, the solution was stirred at 90°C for 6 hours. After cooling to room temperature, a mixture of 2,2-azobisisobutyronitrile (0.03 g), dimethylaminoethyl methacrylate (1.00 g), and 1,4-dioxane (20 ml) was added. Deoxygenation was repeated for 30 minutes, followed by stirring at 90°C for 6 hours. After cooling to room temperature, the mixture was precipitated with 200 ml of n-hexane to obtain a crude block copolymer (PMMA-b-PDMA). The crude product was dissolved in 50 ml of 1,4-dioxane, precipitated with 200 ml of n-hexane, and dried at 70°C for 3 hours to obtain pink solid particles of the block copolymer PMMA-b-PDMA. 2.0 g of PMMA-b-PDMA and 14.3 g of hexadecane bromide were dissolved in 60 ml of 1,4-dioxane and heated at 45°C for 24 hours. After cooling to room temperature, the 1,4-dioxane was removed by rotary evaporation at 100°C to obtain a crude quaternary ammonium salt block copolymer. The product was then washed with acetone in a Soxhlet extractor for 6 hours and dried in a vacuum oven at 100°C for 2 hours to obtain white PMMA-b-PQHDMA particles. 0.05 g of PMMA-b-PQHDMA was dissolved in tetrahydrofuran and stirred vigorously at 35°C until dissolved. 10 ml of distilled water was then added dropwise to obtain a pale white emulsion. The tetrahydrofuran was removed by rotary evaporation at 55°C to obtain a PMMA-b-PQHDMA emulsion with a mass content of 0.5%.

[0082] A PMMA-b-PQHDMA emulsion with a mass content of 0.5% was atomized using an air compression atomizer to remove droplets with a particle size greater than 10 μm. The emulsion was applied to the single surface of the original cotton fabric for 5 minutes at a distance of 5 cm. The emulsion was then taken out and heated in an oven at 180°C for 5 minutes, washed with deionized water (50 ml × 3 times), and dried at 100°C for 1 hour to obtain the product of the present invention.

[0083] The product performance characterization results show that the yield of quaternary ammonium salt block copolymer PMMA-b-PQHDMA is 40%, the hydrophobic angle of the atomized side of the fabric is 127°, the hydrophobic angle of the other side is 0°, and the forward water vapor permeability is 9524g / m 2 / d, reverse moisture permeability is 1076g / m 2 / d, the water absorption rate is 96%, the tensile strength is 32 MPa, the maximum loop height of the fabric after bending is 15.8 mm, the antibacterial rates against Escherichia coli and Staphylococcus aureus are 99.77% and 99.41% respectively, and the antibacterial rates after washing 250 times and rubbing 1000 times are 97.35% and 97.05% respectively.

[0084] Example 16

[0085] 1.20 g of methyl methacrylate, 0.10 g of 2-mercapto-S-thiobenzoyl acetic acid, and 0.08 g of 2,2-azobisisobutyronitrile were dissolved in 25 ml of 1,4-dioxane. After deoxygenation with nitrogen for 30 minutes, the solution was stirred at 90°C for 6 hours. After cooling to room temperature, a mixture of 2,2-azobisisobutyronitrile (0.03 g), dimethylaminoethyl methacrylate (1.20 g), and 1,4-dioxane (20 ml) was added. Deoxygenation was repeated for 30 minutes, followed by stirring at 90°C for 6 hours. After cooling to room temperature, the mixture was precipitated with 200 ml of n-hexane to obtain a crude block copolymer (PMMA-b-PDMA). The crude product was dissolved in 50 ml of 1,4-dioxane, precipitated with 200 ml of n-hexane, and dried at 70°C for 3 hours to obtain pink solid particles of the block copolymer PMMA-b-PDMA. 2.0 g of PMMA-b-PDMA and 14.3 g of hexadecane bromide were dissolved in 60 ml of 1,4-dioxane and heated at 45°C for 24 hours. After cooling to room temperature, the 1,4-dioxane was removed by rotary evaporation at 100°C to obtain a crude quaternary ammonium salt block copolymer. The product was then washed with acetone in a Soxhlet extractor for 6 hours and dried in a vacuum oven at 100°C for 2 hours to obtain white PMMA-b-PQHDMA particles. 0.05 g of PMMA-b-PQHDMA was dissolved in tetrahydrofuran and stirred vigorously at 35°C until dissolved. 10 ml of distilled water was then added dropwise to obtain a pale white emulsion. The tetrahydrofuran was removed by rotary evaporation at 55°C to obtain a PMMA-b-PQHDMA emulsion with a mass content of 0.5%.

[0086] A PMMA-b-PQHDMA emulsion with a mass content of 0.5% was atomized using an air compression atomizer to remove droplets with a particle size greater than 10 μm. The emulsion was applied to the single surface of the original cotton fabric for 5 minutes at a distance of 5 cm. The emulsion was then taken out and heated in an oven at 180°C for 5 minutes, washed with deionized water (50 ml × 3 times), and dried at 100°C for 1 hour to obtain the product of the present invention.

[0087] The product performance characterization results show that the yield of quaternary ammonium salt block copolymer PMMA-b-PQHDMA is 54%, the hydrophobic angle of the atomized side of the fabric is 128°, the hydrophobic angle of the other side is 0°, and the forward water vapor permeability is 9534g / m 2 / d, reverse moisture permeability is 1077g / m 2 / d, the water absorption rate is 95%, the tensile strength is 32 MPa, the maximum loop height of the fabric after bending is 15.8 mm, the antibacterial rates against Escherichia coli and Staphylococcus aureus are 99.94% and 99.89% respectively, and the antibacterial rates after washing 250 times and rubbing 1000 times are 98.56% and 98.66% respectively.

[0088] Example 17

[0089] A solution of 1.20 g of methyl methacrylate, 0.10 g of 2-mercapto-S- thiobenzoyl acetic acid and 0.08 g of 2,2-azobisisobutyronitrile in 25 ml of 1,4- dioxane was deoxygenated with nitrogen for 30 minutes and stirred at 90°C for 6 hours. After the solution was cooled to room temperature, a solution of 2,2-azobisisobutyronitrile (0.03 g), dimethylaminoethyl methacrylate (1.40 g) and 1,4-dioxane (20 ml) was added. The solution was deoxygenated again for 30 minutes and stirred at 90°C for 6 hours. After the solution was cooled to room temperature, it was precipitated with 200 ml of n-hexane to obtain a crude block copolymer (PMMA-b-PDMA). The crude product was dissolved in 50 ml of 1,4-dioxane and precipitated with 200 ml of n-hexane. The pink solid particles of the block copolymer PMMA-b-PDMA were obtained by drying at 70°C for 3 hours. A solution of 2.0 g of PMMA-b-PDMA and 14.3 g of bromohexadecane in 60 ml of 1,4-dioxane was heated at 45°C for 24 hours. After the solution was cooled to room temperature, 1,4-dioxane was removed by rotary evaporation at 100°C to obtain a crude quaternary ammonium salt block copolymer. The crude product was washed with acetone for 6 hours in a Soxhlet extractor and dried in a vacuum oven at 100°C for 2 hours to obtain white PMMA-b-PQHDMA particles. A solution of 0.05 g of PMMA-b-PQHDMA in tetrahydrofuran was prepared. After the solution was stirred vigorously at 35°C until it was dissolved, 10 ml of distilled water was added dropwise to obtain a light white emulsion. After tetrahydrofuran was removed by rotary evaporation at 55°C, an emulsion of PMMA-b-PQHDMA having a mass content of 0.5% was obtained.

[0090] The emulsion of PMMA-b-PQHDMA having a mass content of 0.5% was atomized using an air compression atomizer. The atomized droplets having a particle size of more than 10 micrometers were removed. The atomized emulsion was applied to one side of a raw cotton fabric at a distance of 5 cm for 5 minutes. The treated fabric was taken out and heated in an oven at 180°C for 5 minutes. The treated fabric was washed with deionized water (50 ml x 3 times) and dried at 100°C for 1 hour to obtain a product of the present application.

[0091] The product performance characterization results were as follows: the yield of the quaternary ammonium salt block copolymer PMMA-b-PQHDMA was 44%, the hydrophobic angle of the atomized side of the fabric was 128°, the hydrophobic angle of the other side was 0°, the positive moisture permeability was 9535 g / m 2 / d, the reverse moisture permeability was 1086 g / m 2 / d, the water absorption was 95%, the tensile strength was 31 MPa, the maximum loop height of the fabric after bending was 15.7 mm, the antibacterial rates against Escherichia coli and Staphylococcus aureus were 99.55% and 99.72%, respectively, and the washing and rubbing resistance were 97.34% and 97.05%, respectively, after 250 times of washing and 1000 times of rubbing.

[0092] Example 18

[0093] 1.20 g of methyl methacrylate, 0.10 g of 2-mercapto-S-thiobenzoyl acetic acid, and 0.08 g of 2,2-azobisisobutyronitrile were dissolved in 25 ml of 1,4-dioxane. After deoxygenation with nitrogen for 30 minutes, the solution was stirred at 90°C for 6 hours. After cooling to room temperature, a mixture of 2,2-azobisisobutyronitrile (0.03 g), dimethylaminoethyl methacrylate (1.21 g), and 1,4-dioxane (20 ml) was added. Deoxygenation was repeated for 30 minutes, followed by stirring at 90°C for 6 hours. After cooling to room temperature, the mixture was precipitated with 200 ml of n-hexane to obtain a crude block copolymer (PMMA-b-PDMA). The crude product was dissolved in 50 ml of 1,4-dioxane, precipitated with 200 ml of n-hexane, and dried at 70°C for 3 hours to obtain pink solid particles of the block copolymer PMMA-b-PDMA. 2.0 g of PMMA-b-PDMA and 13.0 g of hexadecane bromide were dissolved in 60 ml of 1,4-dioxane and heated at 45°C for 24 hours. After cooling to room temperature, the 1,4-dioxane was removed by rotary evaporation at 100°C to obtain a crude quaternary ammonium block copolymer. The product was then washed with acetone in a Soxhlet extractor for 6 hours and dried in a vacuum oven at 100°C for 2 hours to obtain white PMMA-b-PQHDMA particles. 0.05 g of PMMA-b-PQHDMA was dissolved in tetrahydrofuran and stirred vigorously at 35°C until dissolved. 10 ml of distilled water was then added dropwise to obtain a pale white emulsion. The tetrahydrofuran was removed by rotary evaporation at 55°C to obtain a PMMA-b-PQHDMA emulsion with a mass content of 0.5%.

[0094] A PMMA-b-PQHDMA emulsion with a mass content of 0.5% was atomized using an air compression atomizer to remove droplets with a particle size greater than 10 μm. The emulsion was applied to the single surface of the original cotton fabric for 5 minutes at a distance of 5 cm. The emulsion was then taken out and heated in an oven at 180°C for 5 minutes, washed with deionized water (50 ml × 3 times), and dried at 100°C for 1 hour to obtain the product of the present invention.

[0095] The product performance characterization results show that the yield of quaternary ammonium salt block copolymer PMMA-b-PQHDMA is 38%, the hydrophobic angle of the atomized side of the fabric is 130°, the hydrophobic angle of the other side is 0°, and the forward water vapor permeability is 9545g / m 2 / d, reverse moisture permeability is 1034g / m 2 / d, the water absorption rate is 95%, the tensile strength is 32 MPa, the maximum loop height of the fabric after bending is 15.8 mm, the antibacterial rates against Escherichia coli and Staphylococcus aureus are 99.78% and 99.66% respectively, and after washing 250 times and rubbing 1000 times, the rates are 98.32% and 98.14% respectively.

[0096] Example 19

[0097] 1.20 g of methyl methacrylate, 0.10 g of 2-mercapto-S-thiobenzoyl acetic acid, and 0.08 g of 2,2-azobisisobutyronitrile were dissolved in 25 ml of 1,4-dioxane. After deoxygenation with nitrogen for 30 minutes, the solution was stirred at 90°C for 6 hours. After cooling to room temperature, a mixture of 2,2-azobisisobutyronitrile (0.03 g), dimethylaminoethyl methacrylate (1.21 g), and 1,4-dioxane (20 ml) was added. Deoxygenation was repeated for 30 minutes, followed by stirring at 90°C for 6 hours. After cooling to room temperature, the mixture was precipitated with 200 ml of n-hexane to obtain a crude block copolymer (PMMA-b-PDMA). The crude product was dissolved in 50 ml of 1,4-dioxane, precipitated with 200 ml of n-hexane, and dried at 70°C for 3 hours to obtain pink solid particles of the block copolymer PMMA-b-PDMA. 2.0 g of PMMA-b-PDMA and 15.0 g of hexadecane bromide were dissolved in 60 ml of 1,4-dioxane and heated at 45°C for 24 hours. After cooling to room temperature, the 1,4-dioxane was removed by rotary evaporation at 100°C to obtain a crude quaternary ammonium block copolymer. The product was then washed with acetone in a Soxhlet extractor for 6 hours and dried in a vacuum oven at 100°C for 2 hours to obtain white PMMA-b-PQHDMA particles. 0.05 g of PMMA-b-PQHDMA was dissolved in tetrahydrofuran and stirred vigorously at 35°C until dissolved. 10 ml of distilled water was then added dropwise to obtain a pale white emulsion. The tetrahydrofuran was removed by rotary evaporation at 55°C to obtain a PMMA-b-PQHDMA emulsion with a mass content of 0.5%.

[0098] A PMMA-b-PQHDMA emulsion with a mass content of 0.5% was atomized using an air compression atomizer to remove droplets with a particle size greater than 10 μm. The emulsion was sprayed on one side of the original cotton fabric for 5 minutes at a distance of 5 cm. The emulsion was taken out and heated in an oven at 180°C for 5 minutes, washed with deionized water (50 ml × 3 times), and dried at 100°C for 1 hour to obtain the product of the present invention.

[0099] The product performance characterization results show that the yield of quaternary ammonium salt block copolymer PMMA-b-PQHDMA is 56%, the hydrophobic angle of the atomized side of the fabric is 130°, the hydrophobic angle of the other side is 0°, and the forward water vapor permeability is 9558g / m 2 / d, reverse moisture permeability is 1068g / m 2 / d, the water absorption rate is 95%, the tensile strength is 32 MPa, the maximum loop height of the fabric after bending is 15.8 mm, the antibacterial rates against Escherichia coli and Staphylococcus aureus are 99.88% and 99.59% respectively, and after washing 250 times and rubbing 1000 times, the rates are 98.56% and 98.28% respectively.

[0100] Example 20

[0101] 1.20 g of methyl methacrylate, 0.10 g of 2-mercapto-S-thiobenzoyl acetic acid, and 0.08 g of 2,2-azobisisobutyronitrile were dissolved in 25 ml of 1,4-dioxane. After deoxygenation with nitrogen for 30 minutes, the solution was stirred at 90°C for 6 hours. After cooling to room temperature, a mixture of 2,2-azobisisobutyronitrile (0.03 g), dimethylaminoethyl methacrylate (1.21 g), and 1,4-dioxane (20 ml) was added. Deoxygenation was repeated for 30 minutes, followed by stirring at 90°C for 6 hours. After cooling to room temperature, the mixture was precipitated with 200 ml of n-hexane to obtain a crude block copolymer (PMMA-b-PDMA). The crude product was dissolved in 50 ml of 1,4-dioxane, precipitated with 200 ml of n-hexane, and dried at 70°C for 3 hours to obtain pink solid particles of the block copolymer PMMA-b-PDMA. 2.0 g of PMMA-b-PDMA and 17.0 g of hexadecane bromide were dissolved in 60 ml of 1,4-dioxane and heated at 45°C for 24 hours. After cooling to room temperature, the 1,4-dioxane was removed by rotary evaporation at 100°C to obtain a crude quaternary ammonium block copolymer. The product was then washed with acetone in a Soxhlet extractor for 6 hours and dried in a vacuum oven at 100°C for 2 hours to obtain white PMMA-b-PQHDMA particles. 0.05 g of PMMA-b-PQHDMA was dissolved in tetrahydrofuran and stirred vigorously at 35°C until dissolved. 10 ml of distilled water was then added dropwise to obtain a pale white emulsion. The tetrahydrofuran was removed by rotary evaporation at 55°C to obtain a PMMA-b-PQHDMA emulsion with a mass content of 0.5%.

[0102] A PMMA-b-PQHDMA emulsion with a mass content of 0.5% was atomized using an air compression atomizer to remove droplets with a particle size greater than 10 μm. The emulsion was sprayed on one side of the original cotton fabric for 5 minutes at a distance of 5 cm. The emulsion was taken out and heated in an oven at 180°C for 5 minutes, washed with deionized water (50 ml × 3 times), and dried at 100°C for 1 hour to obtain the product of the present invention.

[0103] The product performance characterization results show that the yield of quaternary ammonium salt block copolymer PMMA-b-PQHDMA is 40%, the hydrophobic angle on the atomized side of the fabric is 129°, the hydrophobic angle on the other side is 0°, and the forward water vapor permeability is 9567g / m 2 / d, reverse moisture permeability is 1054g / m 2 / d, the water absorption rate is 96%, the tensile strength is 32 MPa, the maximum loop height of the fabric after bending is 15.7 mm, the antibacterial rates against Escherichia coli and Staphylococcus aureus are 99.86% and 99.64% respectively, and after washing 250 times and rubbing 1000 times, the rates are 98.34% and 98.04% respectively.

[0104] Example 21

[0105] 1.20 g of methyl methacrylate, 0.10 g of 2-mercapto-S-thiobenzoyl acetic acid, and 0.08 g of 2,2-azobisisobutyronitrile were dissolved in 25 ml of 1,4-dioxane. After deoxygenation with nitrogen for 30 minutes, the solution was stirred at 90°C for 6 hours. After cooling to room temperature, a mixture of 2,2-azobisisobutyronitrile (0.03 g), dimethylaminoethyl methacrylate (1.21 g), and 1,4-dioxane (20 ml) was added. Deoxygenation was repeated for 30 minutes, followed by stirring at 90°C for 6 hours. After cooling to room temperature, the mixture was precipitated with 200 ml of n-hexane to obtain a crude block copolymer (PMMA-b-PDMA). The crude product was dissolved in 50 ml of 1,4-dioxane, precipitated with 200 ml of n-hexane, and dried at 70°C for 3 hours to obtain pink solid particles of the block copolymer PMMA-b-PDMA. 2.0 g of PMMA-b-PDMA and 15.3 g of hexadecane bromide were dissolved in 60 ml of 1,4-dioxane and heated at 45°C for 24 hours. After cooling to room temperature, the 1,4-dioxane was removed by rotary evaporation at 100°C to obtain a crude quaternary ammonium salt block copolymer. The product was then washed with acetone in a Soxhlet extractor for 6 hours and dried in a vacuum oven at 100°C for 2 hours to obtain white PMMA-b-PQHDMA particles. 0.05 g of PMMA-b-PQHDMA was dissolved in tetrahydrofuran and stirred vigorously at 35°C until dissolved. 10 ml of distilled water was then added dropwise to obtain a pale white emulsion. The tetrahydrofuran was removed by rotary evaporation at 55°C to obtain a PMMA-b-PQHDMA emulsion with a mass content of 0.5%.

[0106] A PMMA-b-PQHDMA emulsion with a mass content of 0.5% was atomized using an air compression atomizer to remove droplets with a particle size of less than 50 μm. The emulsion was sprayed on one side of the original cotton fabric for 5 minutes at a distance of 5 cm. The emulsion was then taken out and heated in an oven at 180°C for 5 minutes, washed with deionized water (50 ml × 3 times), and dried at 100°C for 1 hour to obtain the product of the present invention.

[0107] The product performance characterization results show that the yield of quaternary ammonium salt block copolymer PMMA-b-PQHDMA is 58%, the hydrophobic angle of the atomized side of the fabric is 129°, the hydrophobic angle of the other side is 117°, and the forward water vapor permeability is 1789g / m 2 / d, reverse moisture permeability is 1434g / m 2 / d, the water absorption rate is 85%, the tensile strength is 32 MPa, the maximum loop height of the fabric after bending is 18.3 mm, the antibacterial rates against Escherichia coli and Staphylococcus aureus are 99.57% and 99.25% respectively, and after washing 250 times and rubbing 1000 times, the rates are 98.31% and 98.07% respectively.

[0108] Example 22

[0109] 1.20 kg of methyl methacrylate, 0.10 kg of 2-mercapto-S-thiobenzoyl acetic acid, and 0.08 kg of 2,2-azobisisobutyronitrile were dissolved in 25 liters of 1,4-dioxane. After deoxygenation with nitrogen for 30 minutes, the solution was stirred at 90°C for 6 hours. After cooling to room temperature, a mixed solution of 2,2-azobisisobutyronitrile (0.03 kg), dimethylaminoethyl methacrylate (1.21 kg), and 1,4-dioxane (20 liters) was added. Deoxygenation was again carried out for 30 minutes, and the mixture was stirred at 90°C for 6 hours. After cooling to room temperature, the mixture was precipitated with 200 liters of n-hexane to obtain a crude block copolymer (PMMA-b-PDMA). The crude product was dissolved in 50 L of 1,4-dioxane, precipitated with 200 L of n-hexane, and dried at 70°C for 3 hours to obtain pink solid particles of the block copolymer PMMA-b-PDMA. 2.0 kg of PMMA-b-PDMA and 15.3 kg of hexadecane bromide were dissolved in 60 L of 1,4-dioxane and heated at 45°C for 24 hours. After cooling to room temperature, the 1,4-dioxane was removed by rotary evaporation at 100°C to obtain the crude quaternary ammonium salt block copolymer. The product was then washed with acetone in a Soxhlet extractor for 6 hours and dried in a vacuum oven at 100°C for 2 hours to obtain white PMMA-b-PQHDMA particles. 0.05 kg of PMMA-b-PQHDMA was dissolved in tetrahydrofuran and stirred vigorously at 35°C until dissolved. Then, 10 L of distilled water was added dropwise to obtain a pale white emulsion. After removing tetrahydrofuran by rotary evaporation at 55° C., a PMMA-b-PQHDMA emulsion with a mass content of 0.5% was obtained.

[0110] A PMMA-b-PQHDMA emulsion with a mass content of 0.5% was atomized using an air compression atomizer to remove droplets with a particle size greater than 10 μm. The emulsion was sprayed on one side of the original cotton fabric for 5 minutes at a distance of 5 cm. The emulsion was then taken out and heated in an oven at 180° C. for 5 minutes, washed with deionized water (50 liters × 3 times), and dried at 100° C. for 1 hour to obtain the product of the present invention.

[0111] The product performance characterization results show that the yield of quaternary ammonium salt block copolymer PMMA-b-PQHDMA is 57%, the hydrophobic angle of the atomized side of the fabric is 128°, the hydrophobic angle of the other side is 0°, and the forward water vapor permeability is 9536g / m 2 / d, reverse moisture permeability is 1055g / m 2 / d, the water absorption rate is 96%, the tensile strength is 32 MPa, the maximum loop height of the fabric after bending is 15.8 mm, the antibacterial rates against Escherichia coli and Staphylococcus aureus are 99.88% and 99.89% respectively, and after washing 250 times and rubbing 1000 times, the rates are 98.78% and 98.97% respectively.

[0112] In the above-mentioned Examples 1-22, the amount of rinsing water required during the treatment process is reduced by about 70% compared with the traditional antibacterial finishing process.

[0113] The above embodiments are summarized as follows:

[0114]

[0115]

[0116] phr: represents the number of parts added per 100 parts (by mass) of methyl methacrylate.

[0117] Table 1 Preparation conditions of antibacterial and breathable cotton fabrics.

[0118]

[0119]

[0120] Table 2 Product performance characterization results.

Claims

1. A method for preparing Janus fabric with antibacterial and moisture permeability by mist polymerization, characterized in that The steps include: (1) The quaternary ammonium salt block copolymer emulsion is applied to one side of the cotton fabric by mist polymerization; (2) heating the cotton fabric treated in step (1) at a high temperature for 5 minutes, rinsing and drying to obtain a Janus fabric having antibacterial and moisture permeability; the high temperature is 100° C. to 180° C.; The quaternary ammonium salt block copolymer in step (1) is prepared by the following method: Solution A containing methyl methacrylate, 2-mercapto-S-thiobenzoyl acetic acid, 2,2-azobisisobutyronitrile, and 1,4-dioxane and solution B containing 2,2-azobisisobutyronitrile, dimethylaminoethyl methacrylate, and 1,4-dioxane are mixed and copolymerized to synthesize a block copolymer, namely polymethyl methacrylate-b-polydimethylaminoethyl methacrylate, which is then quaternized with hexadecyl bromide to obtain a quaternary ammonium salt block copolymer.

2. The method for preparing the Janus fabric having antibacterial and moisture-permeable properties by mist polymerization according to claim 1, wherein: Based on the mass of methyl methacrylate as 100%, the monomer dosage ranges are as follows: 2-mercapto-S-thiobenzoylacetic acid in solution A is 7.7%~9.1%, 2,2-azobisisobutyronitrile is 6.2%~7.3%, and 1,4-dioxane is 1988%~2350%. In solution B, 2,2-azobisisobutyronitrile is 2.3%~2.7%, dimethylaminoethyl methacrylate is 83.3%~116.7%, 1,4-dioxane is 1591%~1880%, and hexadecane bromide used for quaternization is 1077%~1417%.

3. The method for preparing the Janus fabric having antibacterial and moisture-permeable properties by mist polymerization according to claim 1, wherein: The quaternary ammonium salt block copolymer was dissolved in tetrahydrofuran, stirred vigorously at 35° C. until dissolved, and distilled water was added dropwise to obtain a pale white emulsion; the tetrahydrofuran was removed by rotary evaporation at 55° C. to obtain a quaternary ammonium salt block copolymer emulsion.

4. The method for preparing the Janus fabric having antibacterial and moisture-permeable properties by mist polymerization according to claim 1, wherein: The mist polymerization is specifically as follows: a quaternary ammonium salt block copolymer emulsion with a mass content of 0.3%-0.7% is atomized into droplets with a particle size of no more than 10 microns, and air flow spray is applied to the single side surface of the cotton fabric, and the fine mist treatment time is 3-7 minutes.

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