Antibacterial moisture-absorbing breathable fabric, preparation method thereof and traceless underwear

Abstract

The invention discloses an antibacterial moisture-absorbing breathable fabric, a preparation method thereof and seamless underwear, and relates to the field of fabrics. When the antibacterial moisture-absorbing breathable fabric is prepared, 2-isopropenyl thiazole, allyl glycidyl ether, N-vinyl pyrrolidone and N, N '-methylene bisacrylamide are subjected to a reaction, and an antibacterial microsphere precursor is obtained; uniformly mixing with zinc oxide, ammonium carbonate and ammonia water to obtain antibacterial microspheres; the preparation method comprises the following steps: reacting 4, 4-diisocyanate dicyclohexylmethane with N-butyl diethanolamine, uniformly mixing with spandex particles, antibacterial microspheres and polyethylene glycol 4000, and spinning to obtain a core layer spandex filament; twisting the core layer spandex filaments and the pure cotton yarns into core-spun yarns, and reacting the core-spun yarns with epoxy chloropropane and silk fibroin in sequence to obtain spun yarns; and weaving the spun yarns to obtain the antibacterial moisture-absorbing breathable fabric. The antibacterial moisture-absorption breathable fabric prepared by the method has excellent mechanical properties, antibacterial property, skin-friendly property and moisture absorption and breathability.

Description

Technical Field

[0001] The invention relates to the field of fabrics, in particular to an antibacterial, moisture-absorbing and breathable fabric and a preparation method thereof, and seamless underwear. Background Art

[0002] As people's quality of life improves, they have higher and higher requirements for the comfort of underwear, which is a kind of ordinary underwear. They also have higher requirements for the degree of fit of various parts, the size, the stretch elasticity of parts with large flexion and extension such as elbows, and the clothing pressure. Traditional clothing processing methods make knitted garments have certain stitching, and the thickness of the stitching will affect the comfort and appearance of knitted clothing, especially tight and body-con styles; in addition, clothing is also constrained by the elasticity of knitted fabrics due to the presence of stitching. Therefore, seamless underwear came into being and has developed rapidly. Seamless underwear is a semi-formed underwear produced by a special circular knitting machine. It uses seamless processing technology. From yarn to underwear, only a small amount of cutting and stitching is required, so that the neck, waist, hips and other parts do not need seams. It combines comfort, fit, fashion and change in one, known as the "second skin of the human body", with incomparable advantages.

[0003] Seamless underwear is a knitted fabric worn next to the skin. In order to make the clothes comfortable and without oppression, the clothing fabric should have a close followability with the human skin. The blended fabric with spandex fiber improves the elasticity and recovery performance of the fabric while maintaining the original properties of the fabric. To a certain extent, the blended fabric clothing with spandex fiber has better shaping properties. Underwear is a product that directly contacts the skin, and the protection of textiles is an especially important part. Sugar, fatty acids, sebum and dandruff in sweat can easily promote the growth and reproduction of microorganisms, and pathogenic microorganisms can cause great harm to human health. Therefore, the present invention prepares a moisture-absorbing and breathable fabric with excellent mechanical properties and antibacterial properties. Summary of the invention

[0004] The object of the present invention is to provide an antibacterial, moisture-absorbing and breathable fabric and a preparation method thereof and seamless underwear, so as to solve the problems existing in the prior art.

[0005] In order to solve the above technical problems, the present invention provides the following technical solutions: an antibacterial, moisture-absorbing and breathable fabric, which is woven by twisting core-layer spandex filaments and pure cotton yarn into core-spun yarn, and then reacting with epichlorohydrin and silk fibroin in sequence.

[0006] As an optimization, the pure cotton yarn model is combed 4.0g / 10m, from Qingdao Xinyutai Textile Co., Ltd.

[0007] As an optimization, the silk fibroin model is water-soluble and comes from Hubei Jianchu Biotechnology Co., Ltd.

[0008] As an optimization, the core layer spandex filament is obtained by reacting 4,4-diisocyanate dicyclohexylmethane and N-butyldiethanolamine, and then mixing with spandex particles, antibacterial microspheres, and polyethylene glycol 4000 before spinning.

[0009] As an optimization, the spandex particles are of drawing grade and come from Dongguan Zhangmutou Elegant Plastic Raw Materials Co., Ltd.

[0010] As an optimization, the polyethylene glycol 4000 comes from Hai'an Petrochemical Plant in Jiangsu Province.

[0011] As an optimization, the antibacterial microspheres are obtained by reacting 2-isopropenylthiazole, allyl glycidyl ether, N-vinyl pyrrolidone, and N,N'-methylenebisacrylamide, and then mixing with zinc oxide, ammonium carbonate and ammonia water.

[0012] A method for preparing an antibacterial, moisture-absorbing and breathable fabric comprises the following steps: (1) 2-isopropenylthiazole, allyl glycidyl ether, N-vinyl pyrrolidone, N,N'-methylenebisacrylamide and deionized water are mixed in a mass ratio of 1: (0.2-0.4): (0.9-1.1): (1-3): (190-210), stirred at 80-90°C and 200-400 rpm for 20-30 min, and a 0.21%-0.23% potassium persulfate aqueous solution with a mass fraction of 20-30 times the mass of 2-isopropenylthiazole is uniformly added within 35-45 min, and stirring is continued for 2-4 h. The mixture is separated with a dialysis bag with a molecular weight of 8000-14000 kDa for 2-4 days, freeze-dried for 11-13 h, and ground and sieved with 200-300 mesh to obtain an antibacterial microsphere precursor; (2) Mix zinc oxide, ammonium carbonate, ammonia water and deionized water in a mass ratio of 1: (2-4): (0.9-1.1): (9-11), and ultrasonically disperse for 20-30 min to obtain a zinc oxide ammonia solution; mix the antibacterial microsphere precursor and deionized water in a mass ratio of 1: (150-250), add 11-13 times the mass of the antibacterial microsphere precursor zinc oxide ammonia solution at a constant speed at 55-65°C for 1-2 h, stir at 300-400 rpm for 25-35 min, cool naturally to room temperature and centrifuge, wash with deionized water 3-5 times, and dry at 60-70°C for 11-13 h to obtain antibacterial microspheres; (3) 4,4-diisocyanate dicyclohexylmethane, N-butyldiethanolamine, bismuth neodecanoate and N,N-dimethylacetamide are mixed in a mass ratio of 1: (1.8-1.9): (0.01-0.03): (6-7), stirred at 100-200 rpm for 1-3 h in a nitrogen atmosphere, and deionized water (30-40 times the mass of 4,4-diisocyanate dicyclohexylmethane) is added. After naturally cooling to room temperature, the mixture is filtered and pelletized, and dried at 35-45° C. for 11-13 h to obtain polyurethane pellets; spandex chips, polyurethane pellets, antibacterial microspheres and polyethylene glycol 4000 are mixed in a mass ratio of 1: (0.1-0.3): (0.02-0.04): (0.02-0.03), and melt-spinned using a twin-screw extruder to obtain core spandex filaments; (4) Pure cotton yarn and core spandex filament are twisted into core-spun yarn using a FA507B ring spinning machine; the core-spun yarn is immersed in a 0.05-0.15 mol / L sodium hydroxide aqueous solution, subjected to ultrasonic treatment for 55-65 min, and an 11%-13% aqueous solution of epichlorohydrin with a volume fraction of 55-65 times the mass of the core-spun yarn and a 35%-45% sodium hydroxide solution with a mass fraction of 6-7 times the mass of the core-spun yarn are added, and stirred at 35-45°C and 150-250 r / min for 2-3 h. After being taken out, it is washed with deionized water for 3-5 times and dried at 60-70°C for 11-13 h to obtain a precursor spinning yarn; (5) Immersing the precursor yarn in a silk fibroin solution, ultrasonically treating the yarn at 60-70°C for 2-4 hours, washing the yarn with deionized water for 3-5 times, and drying the yarn at 105-115°C to obtain the yarn; weaving the yarn with an SM8-TOP2MP electronic seamless forming circular knitting machine to obtain a yarn with a weight of 300-400 g / m 2 , and obtain antibacterial, moisture-absorbing and breathable fabrics.

[0013] As an optimization, the reaction equation of the antibacterial microsphere precursor in step (1) is: .

[0014] As an optimization, the reaction equation of the antibacterial microspheres in step (2) is: .

[0015] As an optimization, the reaction equation of the polyurethane pelletizing in step (3) is: .

[0016] As an optimization, the process parameters of the melt spinning in step (3) are: screw zone 1 temperature 155~165°C, zone 2 temperature 185~195°C, zone 3 temperature 190~200°C, zone 4 temperature 196~198°C, metering pump frequency 16~32HZ, spinning temperature 250~280°C, side blowing temperature 25~35°C, side blowing speed 0.1~0.3m / s, side blowing humidity 70~80%, oil pump frequency 5~10HZ, winding speed 500~800m / min, fineness 20~30D.

[0017] As an optimization, the reaction equation of the precursor spinning yarn in step (4) is: , ; Where R is or H.

[0018] As an optimization, the twisting parameters of step (4) are: front roller gauge 17~19mm, rear roller gauge 44~46mm, spindle speed 11000~13000r / min, draft multiple 3~4, yarn fineness 25~35Ne, twist coefficient 320~340, Z twist.

[0019] As an optimization, the silk fibroin solution in step (5) is obtained by mixing silk fibroin, sodium hydroxide and deionized water in a mass ratio of 1: (0.3-0.5): (150-250).

[0020] A seamless underwear is obtained by cutting the antibacterial, moisture-absorbing and breathable fabric.

[0021] Compared with the prior art, the beneficial effects achieved by the present invention are as follows: when preparing the antibacterial, moisture-absorbing and breathable fabric, 2-isopropenylthiazole, allyl glycidyl ether, N-vinyl pyrrolidone and N,N'-methylenebisacrylamide are reacted to obtain an antibacterial microsphere precursor; then the precursor is mixed with zinc oxide, ammonium carbonate and ammonia water to obtain the antibacterial microsphere; 4,4-diisocyanate dicyclohexylmethane and N-butyldiethanolamine are reacted, then the precursor is mixed with spandex particles, antibacterial microspheres and polyethylene glycol 4000, and then the precursor is spun to obtain core-layer spandex filaments; the core-layer spandex filaments and pure cotton yarn are twisted into core-spun yarn, and then the precursor is reacted with epichlorohydrin and silk fibroin to obtain spun yarn; and the spun yarn is woven to obtain the antibacterial, moisture-absorbing and breathable fabric.

[0022] Firstly, 2-isopropenylthiazole, allyl glycidyl ether, N-vinyl pyrrolidone and N,N'-methylenebisacrylamide are reacted to obtain an antibacterial microsphere precursor; then, the precursor is mixed with zinc oxide, ammonium carbonate and ammonia water to obtain antibacterial microspheres; the antibacterial microspheres are formed by double bond polymerization, and a thiazole structure with unique electron-rich nitrogen, sulfur heteroatom and five-membered heterocycle is introduced to form non-covalent bonds with key bacterial metabolic enzymes, thereby interfering with the normal metabolic process, enhancing the antibacterial effect and improving the antibacterial property of the antibacterial moisture-absorbing and breathable fabric; the lone pair of electrons contained in the nitrogen atom of N-vinyl pyrrolidone is used to coordinate and complex zinc ions, control the release rate of zinc ions, and react with enzymes or other molecules in cells to generate substances with strong oxidizing properties, resulting in cell damage and death, thereby further improving the long-lasting antibacterial property of the antibacterial moisture-absorbing and breathable fabric; at the same time, the epoxy group on allyl glycidyl ether can react with the amino group, carboxyl group or hydroxyl group in silk fibroin to form a cross-linked network, thereby improving the mechanical properties of the antibacterial moisture-absorbing and breathable fabric.

[0023] Secondly, 4,4-diisocyanate dicyclohexylmethane and N-butyldiethanolamine are reacted, and then mixed with spandex particles, antibacterial microspheres, and polyethylene glycol 4000 and spun to obtain core spandex filaments; the core spandex filaments and pure cotton yarn are twisted into core-spun yarn, and then reacted with epichlorohydrin and silk fibroin in sequence to obtain spun yarn; the spun yarn is then woven to produce antibacterial, moisture-absorbing and breathable fabrics; 4,4-diisocyanate dicyclohexylmethane and excess N-butyldiethanolamine are used to obtain hydroxyl-terminated polyurethane pellets, which are blended and spun with spandex particles, tertiary amine groups are introduced, and quaternary ammonium structures are formed under epichlorohydrin finishing, which can absorb moisture through hydrogen bonds, ion-dipole interactions and hydration, thereby improving the hygroscopicity of the antibacterial, moisture-absorbing and breathable fabrics; the quaternary ammonium structure has a positive charge, which can interact electrostatically with the surface of bacteria to break The cell membrane of the damaged bacteria causes the leakage of the cell contents, further improving the antibacterial property of the antibacterial moisture absorption and breathable fabric; polyethylene glycol 4000 is doped as a porogen to form pores and pore structures, thereby improving the air permeability of the antibacterial moisture absorption and breathable fabric; it is finished with epichlorohydrin, reacts with the hydroxyl groups in the pure cotton yarn, grafts the epoxy groups, and then is finished with silk fibroin. The silk fibroin contains a large number of amino, carboxyl and hydroxyl groups, which can form a rich cross-linking network between the antibacterial microspheres, the core layer spandex filaments and the pure cotton yarn, reduce the sliding between the cortex and the core layer, make the structure more stable, and improve the mechanical properties of the antibacterial moisture absorption and breathable fabric; at the same time, the amino acid composition of silk fibroin is similar to the natural protein in the skin, and it has a strong affinity with the stratum corneum of the skin, which reduces the irritation to the skin and improves the skin-friendliness of the antibacterial moisture absorption and breathable fabric. DETAILED DESCRIPTION

[0024] The following will be combined with the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0025] Example 1 A method for preparing an antibacterial, moisture-absorbing, breathable fabric, comprising the following steps: (1) 2-isopropenylthiazole, allyl glycidyl ether, N-vinyl pyrrolidone, N,N'-methylenebisacrylamide and deionized water were mixed in a mass ratio of 1:0.2:0.9:1:190, stirred at 80°C and 200 rpm for 30 min, and a 0.21% potassium persulfate aqueous solution with a mass fraction of 20 times the mass of 2-isopropenylthiazole was added at a uniform rate within 35 min. The mixture was stirred for 4 h, separated with a dialysis bag with a molecular weight of 8000 kDa for 4 days, freeze-dried for 11 h, and ground and sieved with 200 mesh to obtain an antibacterial microsphere precursor; (2) Mix zinc oxide, ammonium carbonate, ammonia water and deionized water in a mass ratio of 1:2:0.9:9, and ultrasonically disperse for 20 minutes to obtain a zinc oxide ammonia solution; mix the antibacterial microsphere precursor and deionized water in a mass ratio of 1:150, add 11 times the mass of the antibacterial microsphere precursor zinc oxide ammonia solution at a constant speed at 55°C for 1 hour, stir at 300 rpm for 35 minutes, cool naturally to room temperature and centrifuge, wash with deionized water three times, and dry at 60°C for 13 hours to obtain antibacterial microspheres; (3) 4,4-diisocyanate dicyclohexylmethane, N-butyldiethanolamine, bismuth neodecanoate and N,N-dimethylacetamide were mixed in a mass ratio of 1:1.8:0.01:6, stirred at 100 rpm for 3 h in a nitrogen atmosphere, and deionized water (30 times the mass of 4,4-diisocyanate dicyclohexylmethane) was added. After naturally cooling to room temperature, the mixture was filtered and pelletized, and dried at 35°C for 13 h to obtain polyurethane pellets. Spandex pellets, polyurethane pellets, antibacterial microspheres and polyethylene glycol 4000 were mixed. Mix them in a mass ratio of 1:0.1:0.02:0.02, and use a twin-screw extruder to perform melt spinning under the conditions of screw zone 1 temperature of 155°C, zone 2 temperature of 185°C, zone 3 temperature of 190°C, zone 4 temperature of 196°C, metering pump frequency of 16HZ, spinning temperature of 250°C, side blowing temperature of 25°C, side blowing speed of 0.1m / s, side blowing humidity of 70%, oil pump frequency of 5HZ, and winding speed of 500m / min to obtain core layer spandex filaments with a fineness of 20D; (4) Pure cotton yarn and core-layer spandex filament were twisted into core-spun yarn using a FA507B ring spinning machine under the conditions of front roller gauge 17 mm, rear roller gauge 44 mm, spindle speed 11000 r / min, draft multiple 3, yarn fineness 25Ne, twist coefficient 320, and Z twist; the core-spun yarn was immersed in a 0.05 mol / L sodium hydroxide aqueous solution, ultrasonicated for 65 min, and an 11% aqueous solution of epichlorohydrin with a volume fraction of 55 times the mass of the core-spun yarn and a 35% sodium hydroxide solution with a mass fraction of 6 times the mass of the core-spun yarn were added, stirred at 35°C and 150 r / min for 3 h, taken out and washed with deionized water 3 times, and dried at 60°C for 13 h to obtain a precursor spinning yarn; (5) Silk fibroin, sodium hydroxide and deionized water were mixed in a mass ratio of 1:0.3:150 to obtain a silk fibroin solution; the precursor yarn was immersed in the silk fibroin solution, ultrasonicated at 60°C for 4 h, taken out and washed with deionized water for 3 times, and dried at 105°C to obtain a yarn; the yarn was woven into a 300 g / m2 yarn using an SM8-TOP2MP electronic seamless forming circular knitting machine. 2 , and obtain antibacterial, moisture-absorbing and breathable fabrics.

[0026] Example 2 A method for preparing an antibacterial, moisture-absorbing, breathable fabric, comprising the following steps: (1) 2-isopropenylthiazole, allyl glycidyl ether, N-vinyl pyrrolidone, N,N'-methylenebisacrylamide and deionized water were mixed in a mass ratio of 1:0.3:1:2:200, stirred at 85°C and 300 rpm for 25 min, and a 0.22% potassium persulfate aqueous solution with a mass fraction of 25 times that of 2-isopropenylthiazole was added at a uniform rate within 40 min. The mixture was stirred for 3 h, separated with a dialysis bag with a molecular weight of 11000 kDa for 3 days, freeze-dried for 12 h, and ground and sieved through 250 mesh to obtain an antibacterial microsphere precursor; (2) Mix zinc oxide, ammonium carbonate, ammonia water and deionized water in a mass ratio of 1:3:1:10, and ultrasonically disperse for 25 minutes to obtain a zinc oxide ammonia solution; mix the antibacterial microsphere precursor and deionized water in a mass ratio of 1:200, add 12 times the mass of the antibacterial microsphere precursor zinc oxide ammonia solution at a constant speed at 60°C for 1.5 hours, stir at 350 rpm for 30 minutes, cool naturally to room temperature and centrifuge, wash with deionized water 4 times, and dry at 65°C for 12 hours to obtain antibacterial microspheres; (3) 4,4-diisocyanate dicyclohexylmethane, N-butyldiethanolamine, bismuth neodecanoate and N,N-dimethylacetamide were mixed in a mass ratio of 1:1.85:0.02:6.5, stirred at 150 rpm for 2 h in a nitrogen atmosphere, and deionized water (35 times the mass of 4,4-diisocyanate dicyclohexylmethane) was added. After naturally cooling to room temperature, the mixture was filtered and pelletized, and dried at 40°C for 12 h to obtain polyurethane pellets. Spandex pellets, polyurethane pellets, antibacterial microspheres and polyethylene glycol 4000 were mixed in a mass ratio of 1:0 .2:0.03:0.025 are mixed, and melt spinning is carried out using a twin-screw extruder under the conditions of screw zone 1 temperature of 160°C, zone 2 temperature of 190°C, zone 3 temperature of 195°C, zone 4 temperature of 197°C, metering pump frequency of 24HZ, spinneret specification of 0.9 / 0.4L / D, spinning temperature of 265°C, side blowing temperature of 30°C, side blowing speed of 0.2m / s, side blowing humidity of 75%, oil pump frequency of 8HZ, and winding speed of 650m / min to obtain core layer spandex filament with a fineness of 25D; (4) Pure cotton yarn and core-layer spandex filament were twisted into core-spun yarn using a FA507B ring spinning machine under the conditions of front roller gauge 18 mm, rear roller gauge 45 mm, spindle speed 12000 r / min, drafting multiple 3.5, yarn fineness 30Ne, twist coefficient 330, and Z twist; the core-spun yarn was immersed in a 0.1 mol / L sodium hydroxide aqueous solution and ultrasonicated for 60 min, and a 12% aqueous solution of epichlorohydrin with a volume fraction of 60 times the mass of the core-spun yarn and a 40% sodium hydroxide solution with a mass fraction of 6.5 times the mass of the core-spun yarn were added, and stirred at 40°C and 200 r / min for 2.5 h. After being taken out, it was washed with deionized water 4 times and dried at 65°C for 12 h to obtain a precursor spinning yarn; (5) Silk fibroin, sodium hydroxide and deionized water were mixed in a mass ratio of 1:0.4:200 to obtain a silk fibroin solution; the precursor yarn was immersed in the silk fibroin solution, ultrasonicated at 65°C for 3 h, taken out and washed with deionized water for 4 times, and dried at 110°C to obtain a yarn; the yarn was woven into a 350 g / m2 yarn using an SM8-TOP2MP electronic seamless forming knitting circular machine. 2 , and obtain antibacterial, moisture-absorbing and breathable fabrics.

[0027] Example 3 A method for preparing an antibacterial, moisture-absorbing, breathable fabric, comprising the following steps: (1) 2-isopropenylthiazole, allyl glycidyl ether, N-vinyl pyrrolidone, N,N'-methylenebisacrylamide and deionized water were mixed in a mass ratio of 1:0.4:1.1:3:210, stirred at 90°C and 400 rpm for 20 min, and a 0.23% potassium persulfate aqueous solution with a mass fraction of 30 times the mass of 2-isopropenylthiazole was added at a uniform rate within 45 min. The mixture was stirred for 2 h, separated with a dialysis bag with a molecular weight of 14000 kDa for 2 days, freeze-dried for 13 h, and ground and sieved through 300 mesh to obtain an antibacterial microsphere precursor; (2) Mix zinc oxide, ammonium carbonate, ammonia water and deionized water in a mass ratio of 1:4:1.1:11, and ultrasonically disperse for 30 minutes to obtain a zinc oxide ammonia solution; mix the antibacterial microsphere precursor and deionized water in a mass ratio of 1:250, add 13 times the mass of the antibacterial microsphere precursor zinc oxide ammonia solution at a constant speed at 65°C for 2 hours, stir at 400 rpm for 25 minutes, cool naturally to room temperature and centrifuge, wash with deionized water 5 times, and dry at 70°C for 11 hours to obtain antibacterial microspheres; (3) 4,4-diisocyanate dicyclohexylmethane, N-butyldiethanolamine, bismuth neodecanoate and N,N-dimethylacetamide were mixed in a mass ratio of 1:1.9:0.03:7, stirred at 200 rpm for 1 h in a nitrogen atmosphere, and deionized water 40 times the mass of 4,4-diisocyanate dicyclohexylmethane was added. After natural cooling to room temperature, the mixture was filtered and pelletized, and dried at 45°C for 11 h to obtain polyurethane pellets; spandex pellets, polyurethane pellets, antibacterial microspheres and polyethylene glycol 4000 were mixed in a mass ratio of 1:0. 3:0.04:0.03 were mixed, and melt spinning was performed using a twin-screw extruder under the conditions of screw zone 1 temperature of 165°C, zone 2 temperature of 195°C, zone 3 temperature of 200°C, zone 4 temperature of 198°C, metering pump frequency of 32HZ, spinneret specification of 0.9 / 0.5L / D, spinning temperature of 280°C, side blowing temperature of 35°C, side blowing speed of 0.3m / s, side blowing humidity of 80%, oil pump frequency of 10HZ, and winding speed of 800m / min to obtain core layer spandex filament with a fineness of 30D; (4) The pure cotton yarn and the core-layer spandex filament were twisted into core-spun yarn using a FA507B ring spinning machine under the conditions of a front roller gauge of 19 mm, a rear roller gauge of 46 mm, a spindle speed of 13000 r / min, a draft multiple of 4, a yarn fineness of 35Ne, a twist coefficient of 340, and a Z twist; the core-spun yarn was immersed in a 0.15 mol / L sodium hydroxide aqueous solution, ultrasonicated for 65 min, and a 13% aqueous solution of epichlorohydrin with a volume fraction of 65 times the mass of the core-spun yarn and a 45% sodium hydroxide solution with a mass fraction of 7 times the mass of the core-spun yarn were added, stirred at 45°C and 250 r / min for 2 h, taken out and washed with deionized water for 5 times, and dried at 70°C for 11 h to obtain a precursor spinning yarn; (5) Silk fibroin, sodium hydroxide and deionized water were mixed in a mass ratio of 1:0.5:250 to obtain a silk fibroin solution; the precursor yarn was immersed in the silk fibroin solution, ultrasonicated at 70°C for 2 h, taken out and washed with deionized water for 5 times, and dried at 115°C to obtain a yarn; the yarn was woven into a 400 g / m2 yarn using an SM8-TOP2MP electronic seamless forming circular knitting machine. 2 , and obtain antibacterial, moisture-absorbing and breathable fabrics.

[0028] Comparative Example 1: A method for preparing an antibacterial, moisture-absorbing, breathable fabric, comprising the following steps: (1) 2-isopropenylthiazole, allyl glycidyl ether, N-vinyl pyrrolidone, N,N'-methylenebisacrylamide and deionized water were mixed in a mass ratio of 1:0.3:1:2:200, stirred at 85°C and 300 rpm for 25 min, and a 0.22% potassium persulfate aqueous solution with a mass fraction of 25 times that of 2-isopropenylthiazole was added at a uniform rate within 40 min. The mixture was stirred for 3 h, separated with a dialysis bag with a molecular weight of 11000 kDa for 3 days, freeze-dried for 12 h, and ground and sieved through 250 mesh to obtain an antibacterial microsphere precursor; (2) 4,4-diisocyanate dicyclohexylmethane, N-butyldiethanolamine, bismuth neodecanoate and N,N-dimethylacetamide were mixed in a mass ratio of 1:1.85:0.02:6.5, stirred at 150 rpm for 2 h in a nitrogen atmosphere, and deionized water (35 times the mass of 4,4-diisocyanate dicyclohexylmethane) was added. After naturally cooling to room temperature, the mixture was filtered and pelletized, and dried at 40°C for 12 h to obtain polyurethane pellets. Spandex pellets, polyurethane pellets, antibacterial microsphere precursors and polyethylene glycol 4000 were mixed in a mass ratio of 1:1.85:0.02:6.5. 0.2:0.03:0.025 were mixed, and melt spinning was performed using a twin-screw extruder under the conditions of screw zone 1 temperature of 160°C, zone 2 temperature of 190°C, zone 3 temperature of 195°C, zone 4 temperature of 197°C, metering pump frequency of 24HZ, spinneret specification of 0.9 / 0.4L / D, spinning temperature of 265°C, side blowing temperature of 30°C, side blowing speed of 0.2m / s, side blowing humidity of 75%, oil pump frequency of 8HZ, and winding speed of 650m / min to obtain core layer spandex filament with a fineness of 25D; (3) The pure cotton yarn and the core layer spandex filament were twisted into core-spun yarn using a FA507B ring spinning machine under the conditions of front roller gauge 18 mm, rear roller gauge 45 mm, spindle speed 12000 r / min, drafting multiple 3.5, yarn fineness 30Ne, twist coefficient 330, and Z twist; the core-spun yarn was immersed in a 0.1 mol / L sodium hydroxide aqueous solution and ultrasonicated for 60 min, and a 12% aqueous solution of epichlorohydrin with a volume fraction of 60 times the mass of the core-spun yarn and a 40% sodium hydroxide solution with a mass fraction of 6.5 times the mass of the core-spun yarn were added, and stirred at 40°C and 200 r / min for 2.5 h. After being taken out, it was washed with deionized water for 4 times and dried at 65°C for 12 h to obtain a precursor spinning yarn; (4) Silk fibroin, sodium hydroxide and deionized water were mixed in a mass ratio of 1:0.4:200 to obtain a silk fibroin solution; the precursor yarn was immersed in the silk fibroin solution, ultrasonicated at 65°C for 3 h, taken out and washed with deionized water for 4 times, and dried at 110°C to obtain a yarn; the yarn was woven into a 350 g / m2 yarn using an SM8-TOP2MP electronic seamless forming circular knitting machine. 2 , and obtain antibacterial, moisture-absorbing and breathable fabrics.

[0029] Comparative Example 2: A method for preparing an antibacterial, moisture-absorbing, breathable fabric, comprising the following steps: (1) N-vinyl pyrrolidone, allyl glycidyl ether, N,N'-methylenebisacrylamide and deionized water were mixed in a mass ratio of 1:0.3:2:200, stirred at 85 °C and 300 rpm for 25 min, and a 0.22% potassium persulfate aqueous solution with a mass fraction of 25 times that of 2-isopropenylthiazole was added at a uniform rate within 40 min. The mixture was stirred for 3 h, separated with a dialysis bag with a molecular weight of 11000 kDa for 3 days, freeze-dried for 12 h, and ground and sieved through 250 mesh to obtain an antibacterial microsphere precursor; (2) Mix zinc oxide, ammonium carbonate, ammonia water and deionized water in a mass ratio of 1:3:1:10, and ultrasonically disperse for 25 minutes to obtain a zinc oxide ammonia solution; mix the antibacterial microsphere precursor and deionized water in a mass ratio of 1:200, add 12 times the mass of the antibacterial microsphere precursor zinc oxide ammonia solution at a constant speed at 60°C for 1.5 hours, stir at 350 rpm for 30 minutes, cool naturally to room temperature and centrifuge, wash with deionized water 4 times, and dry at 65°C for 12 hours to obtain antibacterial microspheres; (3) 4,4-diisocyanate dicyclohexylmethane, N-butyldiethanolamine, bismuth neodecanoate and N,N-dimethylacetamide were mixed in a mass ratio of 1:1.85:0.02:6.5, stirred at 150 rpm for 2 h in a nitrogen atmosphere, and deionized water (35 times the mass of 4,4-diisocyanate dicyclohexylmethane) was added. After naturally cooling to room temperature, the mixture was filtered and pelletized, and dried at 40°C for 12 h to obtain polyurethane pellets. Spandex pellets, polyurethane pellets, antibacterial microspheres and polyethylene glycol 4000 were mixed in a mass ratio of 1:0 .2:0.03:0.025 are mixed, and melt spinning is carried out using a twin-screw extruder under the conditions of screw zone 1 temperature of 160°C, zone 2 temperature of 190°C, zone 3 temperature of 195°C, zone 4 temperature of 197°C, metering pump frequency of 24HZ, spinneret specification of 0.9 / 0.4L / D, spinning temperature of 265°C, side blowing temperature of 30°C, side blowing speed of 0.2m / s, side blowing humidity of 75%, oil pump frequency of 8HZ, and winding speed of 650m / min to obtain core layer spandex filament with a fineness of 25D; (4) Pure cotton yarn and core-layer spandex filament were twisted into core-spun yarn using a FA507B ring spinning machine under the conditions of front roller gauge 18 mm, rear roller gauge 45 mm, spindle speed 12000 r / min, drafting multiple 3.5, yarn fineness 30Ne, twist coefficient 330, and Z twist; the core-spun yarn was immersed in a 0.1 mol / L sodium hydroxide aqueous solution and ultrasonicated for 60 min, and a 12% aqueous solution of epichlorohydrin with a volume fraction of 60 times the mass of the core-spun yarn and a 40% sodium hydroxide solution with a mass fraction of 6.5 times the mass of the core-spun yarn were added, and stirred at 40°C and 200 r / min for 2.5 h. After being taken out, it was washed with deionized water 4 times and dried at 65°C for 12 h to obtain a precursor spinning yarn; (5) Silk fibroin, sodium hydroxide and deionized water were mixed in a mass ratio of 1:0.4:200 to obtain a silk fibroin solution; the precursor yarn was immersed in the silk fibroin solution, ultrasonicated at 65°C for 3 h, taken out and washed with deionized water for 4 times, and dried at 110°C to obtain a yarn; the yarn was woven into a 350 g / m2 yarn using an SM8-TOP2MP electronic seamless forming knitting circular machine. 2 , and obtain antibacterial, moisture-absorbing and breathable fabrics.

[0030] Comparative Example 3: A method for preparing an antibacterial, moisture-absorbing, breathable fabric, comprising the following steps: (1) 2-isopropenylthiazole, allyl glycidyl ether, N-vinyl pyrrolidone, N,N'-methylenebisacrylamide and deionized water were mixed in a mass ratio of 1:0.3:1:2:200, stirred at 85°C and 300 rpm for 25 min, and a 0.22% potassium persulfate aqueous solution with a mass fraction of 25 times that of 2-isopropenylthiazole was added at a uniform rate within 40 min. The mixture was stirred for 3 h, separated with a dialysis bag with a molecular weight of 11000 kDa for 3 days, freeze-dried for 12 h, and ground and sieved through 250 mesh to obtain an antibacterial microsphere precursor; (2) Mix zinc oxide, ammonium carbonate, ammonia water and deionized water in a mass ratio of 1:3:1:10, and ultrasonically disperse for 25 minutes to obtain a zinc oxide ammonia solution; mix the antibacterial microsphere precursor and deionized water in a mass ratio of 1:200, add 12 times the mass of the antibacterial microsphere precursor zinc oxide ammonia solution at a constant speed at 60°C for 1.5 hours, stir at 350 rpm for 30 minutes, cool naturally to room temperature and centrifuge, wash with deionized water 4 times, and dry at 65°C for 12 hours to obtain antibacterial microspheres; (3) Spandex particles, antibacterial microspheres and polyethylene glycol 4000 were mixed in a mass ratio of 1:0.03:0.025, and melt-spun using a twin-screw extruder at a screw zone temperature of 160°C, a zone temperature of 190°C, a zone temperature of 195°C, a zone temperature of 197°C, a metering pump frequency of 24HZ, a spinneret specification of 0.9 / 0.4L / D, a spinning temperature of 265°C, a side-blowing temperature of 30°C, a side-blowing speed of 0.2m / s, a side-blowing humidity of 75%, an oil pump frequency of 8HZ, and a winding speed of 650m / min to obtain a core layer spandex filament with a fineness of 25D; (4) Pure cotton yarn and core-layer spandex filament were twisted into core-spun yarn using a FA507B ring spinning machine under the conditions of front roller gauge 18 mm, rear roller gauge 45 mm, spindle speed 12000 r / min, drafting multiple 3.5, yarn fineness 30Ne, twist coefficient 330, and Z twist; the core-spun yarn was immersed in a 0.1 mol / L sodium hydroxide aqueous solution and ultrasonicated for 60 min, and a 12% aqueous solution of epichlorohydrin with a volume fraction of 60 times the mass of the core-spun yarn and a 40% sodium hydroxide solution with a mass fraction of 6.5 times the mass of the core-spun yarn were added, and stirred at 40°C and 200 r / min for 2.5 h. After being taken out, it was washed with deionized water 4 times and dried at 65°C for 12 h to obtain a precursor spinning yarn; (5) Silk fibroin, sodium hydroxide and deionized water were mixed in a mass ratio of 1:0.4:200 to obtain a silk fibroin solution; the precursor yarn was immersed in the silk fibroin solution, ultrasonicated at 65°C for 3 h, taken out and washed with deionized water for 4 times, and dried at 110°C to obtain a yarn; the yarn was woven into a 350 g / m2 yarn using an SM8-TOP2MP electronic seamless forming knitting circular machine. 2 , and obtain antibacterial, moisture-absorbing and breathable fabrics.

[0031] Comparative Example 4: A method for preparing an antibacterial, moisture-absorbing, breathable fabric, comprising the following steps: (1) 2-isopropenylthiazole, allyl glycidyl ether, N-vinyl pyrrolidone, N,N'-methylenebisacrylamide and deionized water were mixed in a mass ratio of 1:0.3:1:2:200, stirred at 85°C and 300 rpm for 25 min, and a 0.22% potassium persulfate aqueous solution with a mass fraction of 25 times that of 2-isopropenylthiazole was added at a uniform rate within 40 min. The mixture was stirred for 3 h, separated with a dialysis bag with a molecular weight of 11000 kDa for 3 days, freeze-dried for 12 h, and ground and sieved through 250 mesh to obtain an antibacterial microsphere precursor; (2) Mix zinc oxide, ammonium carbonate, ammonia water and deionized water in a mass ratio of 1:3:1:10, and ultrasonically disperse for 25 minutes to obtain a zinc oxide ammonia solution; mix the antibacterial microsphere precursor and deionized water in a mass ratio of 1:200, add 12 times the mass of the antibacterial microsphere precursor zinc oxide ammonia solution at a constant speed at 60°C for 1.5 hours, stir at 350 rpm for 30 minutes, cool naturally to room temperature and centrifuge, wash with deionized water 4 times, and dry at 65°C for 12 hours to obtain antibacterial microspheres; (3) 4,4-diisocyanate dicyclohexylmethane, N-butyldiethanolamine, bismuth neodecanoate and N,N-dimethylacetamide were mixed in a mass ratio of 1:1.85:0.02:6.5, stirred at 150 rpm for 2 h in a nitrogen atmosphere, and deionized water (35 times the mass of 4,4-diisocyanate dicyclohexylmethane) was added. After naturally cooling to room temperature, the mixture was filtered and pelletized, and dried at 40°C for 12 h to obtain polyurethane pellets. Spandex pellets, polyurethane pellets, antibacterial microspheres and polyethylene glycol 4000 were mixed in a mass ratio of 1:0 .2:0.03:0.025 are mixed, and melt spinning is carried out using a twin-screw extruder under the conditions of screw zone 1 temperature of 160°C, zone 2 temperature of 190°C, zone 3 temperature of 195°C, zone 4 temperature of 197°C, metering pump frequency of 24HZ, spinneret specification of 0.9 / 0.4L / D, spinning temperature of 265°C, side blowing temperature of 30°C, side blowing speed of 0.2m / s, side blowing humidity of 75%, oil pump frequency of 8HZ, and winding speed of 650m / min to obtain core layer spandex filament with a fineness of 25D; (4) Pure cotton yarn and core-layer spandex filament were twisted into core-spun yarn using a FA507B ring spinning machine under the conditions of front roller gauge 18 mm, rear roller gauge 45 mm, spindle speed 12000 r / min, drafting multiple 3.5, yarn fineness 30Ne, twist coefficient 330, and Z twist; the core-spun yarn was immersed in a 0.1 mol / L sodium hydroxide aqueous solution and ultrasonicated for 60 min, and a 12% aqueous solution of epichlorohydrin with a volume fraction of 60 times the mass of the core-spun yarn and a 40% sodium hydroxide solution with a mass fraction of 6.5 times the mass of the core-spun yarn were added, and stirred at 40°C and 200 r / min for 2.5 h. After being taken out, it was washed with deionized water 4 times and dried at 65°C for 12 h to obtain a precursor spinning yarn; (5) The precursor yarn is woven into 350g / m using an SM8-TOP2MP electronic seamless forming circular knitting machine. 2 , and obtain antibacterial, moisture-absorbing and breathable fabrics.

[0032] Comparative Example 5: A method for preparing an antibacterial, moisture-absorbing, breathable fabric, comprising the following steps: (1) 2-isopropenylthiazole, allyl glycidyl ether, N-vinyl pyrrolidone, N,N'-methylenebisacrylamide and deionized water were mixed in a mass ratio of 1:0.3:1:2:200, stirred at 85°C and 300 rpm for 25 min, and a 0.22% potassium persulfate aqueous solution with a mass fraction of 25 times that of 2-isopropenylthiazole was added at a uniform rate within 40 min. The mixture was stirred for 3 h, separated with a dialysis bag with a molecular weight of 11000 kDa for 3 days, freeze-dried for 12 h, and ground and sieved through 250 mesh to obtain an antibacterial microsphere precursor; (2) Mix zinc oxide, ammonium carbonate, ammonia water and deionized water in a mass ratio of 1:3:1:10, and ultrasonically disperse for 25 minutes to obtain a zinc oxide ammonia solution; mix the antibacterial microsphere precursor and deionized water in a mass ratio of 1:200, add 12 times the mass of the antibacterial microsphere precursor zinc oxide ammonia solution at a constant speed at 60°C for 1.5 hours, stir at 350 rpm for 30 minutes, cool naturally to room temperature and centrifuge, wash with deionized water 4 times, and dry at 65°C for 12 hours to obtain antibacterial microspheres; (3) 4,4-diisocyanate dicyclohexylmethane, N-butyldiethanolamine, bismuth neodecanoate and N,N-dimethylacetamide were mixed in a mass ratio of 1:1.85:0.02:6.5, stirred at 150 rpm for 2 h in a nitrogen atmosphere, and deionized water (35 times the mass of 4,4-diisocyanate dicyclohexylmethane) was added. After naturally cooling to room temperature, the mixture was filtered and pelletized, and dried at 40°C for 12 h to obtain polyurethane pellets. Spandex pellets, polyurethane pellets and antibacterial microspheres were mixed in a mass ratio of 1:0. 2:0.03 mixing, using a twin-screw extruder, melt spinning under the conditions of screw zone 1 temperature 160°C, zone 2 temperature 190°C, zone 3 temperature 195°C, zone 4 temperature 197°C, metering pump frequency 24HZ, spinneret specification 0.9 / 0.4L / D, spinning temperature 265°C, side blowing temperature 30°C, side blowing speed 0.2m / s, side blowing humidity 75%, oil pump frequency 8HZ, winding speed 650m / min, to obtain core layer spandex filament with a fineness of 25D; (4) Pure cotton yarn and core-layer spandex filament were twisted into core-spun yarn using a FA507B ring spinning machine under the conditions of front roller gauge 18 mm, rear roller gauge 45 mm, spindle speed 12000 r / min, drafting multiple 3.5, yarn fineness 30Ne, twist coefficient 330, and Z twist; the core-spun yarn was immersed in a 0.1 mol / L sodium hydroxide aqueous solution and ultrasonicated for 60 min, and a 12% aqueous solution of epichlorohydrin with a volume fraction of 60 times the mass of the core-spun yarn and a 40% sodium hydroxide solution with a mass fraction of 6.5 times the mass of the core-spun yarn were added, and stirred at 40°C and 200 r / min for 2.5 h. After being taken out, it was washed with deionized water 4 times and dried at 65°C for 12 h to obtain a precursor spinning yarn; (5) Silk fibroin, sodium hydroxide and deionized water were mixed in a mass ratio of 1:0.4:200 to obtain a silk fibroin solution; the precursor yarn was immersed in the silk fibroin solution, ultrasonicated at 65°C for 3 h, taken out and washed with deionized water for 4 times, and dried at 110°C to obtain a yarn; the yarn was woven into a 350 g / m2 yarn using an SM8-TOP2MP electronic seamless forming knitting circular machine. 2 , and obtain antibacterial, moisture-absorbing and breathable fabrics.

[0033] Test Example 1: 1. Hygroscopicity Test method: Take samples of 10 cm × 10 cm in size from the antibacterial moisture-absorbing and breathable fabrics obtained in each embodiment and the comparative example, adjust the humidity for 24 hours at a temperature of 25°C and a relative humidity of 65%, and weigh M 0 , soak in deionized water for 5 min, take out, let dry until no droplets fall within 30 s, and weigh M again 1 , calculate water absorption = (M 1 -M 0 ) / M0 *100%.

[0034] 2. Breathability Test method: The antibacterial moisture-absorbing and breathable fabrics obtained in each embodiment and the comparative example were humidified for 12 hours according to GB / T6529, and then the air permeability was measured using a YG461E air permeability tester according to GB / T5453.

[0035] 3. Skin-friendly Test method: The antibacterial, moisture-absorbing and breathable fabrics obtained in each embodiment and the comparative example were ironed in a constant temperature and humidity laboratory at a temperature of 23°C and a humidity of 60% and then balanced for 24 hours. The subjects adapted to the surrounding environment for 20 minutes to keep calm, and then touched the samples in sequence to evaluate the touch of the fabric (not itchy, generally itchy, slightly itchy, very itchy, and extremely itchy).

[0036] Table 1 below shows the analysis results of the skin affinity and moisture absorption and breathability of the antibacterial moisture absorption and breathable fabrics of Examples 1 to 3 of the present invention and Comparative Examples 1 to 5.

[0037]

[0038] From the comparison of the experimental data of Examples 1 to 3 and Comparative Examples 1 to 5 in Table 1, it can be found that the antibacterial moisture-absorbing and breathable fabric prepared by the present invention has good skin-friendliness and moisture-absorbing and breathable properties.

[0039] By comparison, the water absorption rates of Examples 1, 2, and 3 are higher than that of Comparative Example 3, which illustrates that polyurethane pellets with hydroxyl ends are obtained by reacting 4,4-diisocyanate dicyclohexylmethane and excess N-butyldiethanolamine, which are blended with spandex pellets and spun, and tertiary amine groups are introduced. A quaternary ammonium structure is formed under epichlorohydrin finishing, which can absorb moisture through hydrogen bonds, ion-dipole interactions and hydration, thereby improving the hygroscopicity of the antibacterial, moisture-absorbing and breathable fabric.

[0040] By comparison, Examples 1, 2, and 3 have a better touch than Comparative Example 4, which shows that the amino acid composition of silk fibroin is similar to that of natural protein in the skin, and it has a strong affinity with the stratum corneum of the skin, which reduces irritation to the skin and improves the skin-affinity of the antibacterial, moisture-absorbing, and breathable fabric.

[0041] By comparison, the air permeabilities of Examples 1, 2, and 3 are higher than those of Comparative Example 5, indicating that the addition of polyethylene glycol 4000 as a porogen forms pores and pore structures, thereby improving the air permeability of the antibacterial, moisture-absorbing, and breathable fabric.

[0042] Test Example 2: 1. Mechanical properties Test method: The spun yarns obtained in each embodiment and the comparative example were measured under the conditions of pre-tension 1 cN and yarn gauge 500 mm. 0, apply a 20cN load for 3 minutes and then test the length L 1 , remove the fixed force, leave the pre-tension for 1 minute and then test the length L 2 , calculate the elastic recovery rate of constant force stretching = (L 1 -L 2 ) / (L 1 -L 0 )*100%.

[0043] 2. Antibacterial Test method: 0.75 g of the antibacterial moisture-absorbing and breathable fabric obtained in each embodiment and the comparative example were cut into pieces as the sample to be tested. According to the GB / T20944 oscillation method, Gram-negative Escherichia coli was selected and cultured at 37°C for 18 hours to obtain a separated single colony. On the solid culture medium, a typical colony was selected and transferred to 20 mL of liquid culture medium using an inoculation loop, and cultured at 37°C and an oscillation speed of 120 r / min for 20 hours to obtain a bacterial solution with a specific number of viable bacteria; the sample to be tested was placed in a flask (no sample was added as the control group), 70 mL of PBS buffer and 5 mL of diluted bacterial solution with a specific number of viable bacteria were added, and then after shaking on a shaker at 37°C and 120 rpm for 18 hours, 100 μL of the bacterial suspension diluted to an appropriate multiple was taken and evenly coated on the surface of the solid culture medium, and cultured in a sterile environment at a constant temperature of 37°C for 24 hours, and the single colonies on the solid culture medium were counted. 1 (The live bacteria concentration in the control group W 0 ), calculate the inhibition rate Q 0 =(W 0 -W 1 ) / W 0 *100%; 0.75 g of the antibacterial, moisture-absorbing and breathable fabric obtained in each embodiment and the comparative example were taken respectively, washed with deionized water for 5 min, dried at 60°C for 1 h, and washed and dried 30 times, and cut into pieces as the test samples, and the antibacterial rate Q was measured according to GB / T20944 1 =(W 0 -W 1 ) / W 0 *100%, calculate the antibacterial retention rate = Q 1 / Q 0 *100%.

[0044] Table 2 below shows the analysis results of the mechanical properties and antibacterial properties of the antibacterial moisture-absorbing and breathable fabrics of Examples 1 to 3 of the present invention and Comparative Examples 1 to 5.

[0045]

[0046] From the comparison of the experimental data of Examples 1 to 3 and Comparative Examples 1 to 5 in Table 2, it can be found that the antibacterial moisture-absorbing and breathable fabric prepared by the present invention has good mechanical properties and antibacterial properties.

[0047] By comparison, the antibacterial retention rates of Examples 1, 2, and 3 are higher than those of Comparative Example 1, indicating that the lone pair of electrons contained in the nitrogen atom of N-vinyl pyrrolidone coordinates and complexes the zinc ions, controls the release rate of the zinc ions, and the zinc ions react with enzymes or other molecules in the cells to generate substances with strong oxidizing properties, leading to cell damage and death, thereby improving the long-lasting antibacterial properties of the antibacterial, moisture-absorbing, and breathable fabric.

[0048] By comparison, the antibacterial rates of Examples 1, 2, and 3 are higher than those of Comparative Example 2, which illustrates that the antibacterial microspheres are formed by double bond polymerization, and a thiazole structure with unique electron-rich nitrogen, sulfur heteroatoms and five-membered heterocycles is introduced, which non-covalently binds to key bacterial metabolic enzymes, interferes with the normal metabolic process, enhances the antibacterial effect, and improves the antibacterial properties of antibacterial, moisture-absorbing and breathable fabrics.

[0049] By comparison, the elastic recovery rate and antibacterial rate of Examples 1, 2, and 3 are higher than those of Comparative Example 3, which illustrates that polyurethane pellets are obtained by reacting 4,4-diisocyanate dicyclohexylmethane and N-butyldiethanolamine, and are blended with spandex pellets to introduce tertiary amine groups. A quaternary ammonium structure with a positive charge is formed under epichlorohydrin finishing, which can electrostatically interact with the bacterial surface, destroy the bacterial cell membrane, cause leakage of cell contents, and improve the antibacterial property of the antibacterial, moisture-absorbing, and breathable fabric; at the same time, the epoxy group grafted on epichlorohydrin can react with the amino group, carboxyl group, or hydroxyl group in the silk fibroin to form a cross-linked network, thereby improving the mechanical properties of the antibacterial, moisture-absorbing, and breathable fabric.

[0050] By comparison, the elastic recovery rate of Examples 1, 2, and 3 is higher than that of Comparative Example 4, which illustrates the use of silk fibroin finishing. Silk fibroin contains a large number of amino, carboxyl and hydroxyl groups, which can form a rich cross-linked network between the antibacterial microspheres, the core layer spandex filaments and the pure cotton yarn, reduce the sliding between the cortex and the core layer, make the structure more stable, and improve the mechanical properties of the antibacterial, moisture-absorbing and breathable fabric.

[0051] The specific implementation methods described above further illustrate the objectives, technical solutions and beneficial effects of the present invention in detail. It should be understood that the above description is only a specific implementation method of the present invention and is not intended to limit the scope of protection of the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. An antibacterial, moisture-absorbing and breathable fabric, characterized in that: The antibacterial moisture-absorbing and breathable fabric is obtained by twisting core-layer spandex filaments and pure cotton yarns into core-spun yarns, and then reacting with epichlorohydrin and silk fibroin in sequence before weaving; the core-layer spandex filaments are obtained by reacting 4,4-diisocyanate dicyclohexylmethane and N-butyldiethanolamine, and then mixing with spandex particles, antibacterial microspheres and polyethylene glycol 4000 before spinning; the antibacterial microspheres are obtained by reacting 2-isopropenylthiazole, allyl glycidyl ether, N-vinyl pyrrolidone and N,N'-methylenebisacrylamide, and then mixing with zinc oxide, ammonium carbonate and ammonia water.

2. A method for preparing an antibacterial, moisture-absorbing and breathable fabric, characterized in that: The method comprises the following preparation steps: (1) 2-isopropenylthiazole, allyl glycidyl ether, N-vinyl pyrrolidone, N,N'-methylenebisacrylamide and deionized water are mixed, and a potassium persulfate aqueous solution is added and dialyzed to prepare an antibacterial microsphere precursor; (2) mixing zinc oxide, ammonium carbonate, ammonia water and deionized water to obtain a zinc oxide ammonia solution; mixing an antibacterial microsphere precursor and deionized water, adding the zinc oxide ammonia solution to obtain antibacterial microspheres; (3) Mix 4,4-diisocyanate dicyclohexylmethane, N-butyldiethanolamine, bismuth neodecanoate and N,N-dimethylacetamide, add deionized water, cool, filter and pelletize to obtain polyurethane pellets; mix spandex pellets, polyurethane pellets, antibacterial microspheres and polyethylene glycol 4000, and perform melt spinning with a twin-screw extruder to obtain core spandex filaments; (4) twisting pure cotton yarn and core spandex filament into core-spun yarn using a FA507B ring spinning machine; immersing the core-spun yarn in a sodium hydroxide aqueous solution, adding an epichlorohydrin aqueous solution and a sodium hydroxide solution to obtain a precursor spinning yarn; (5) Immersing the precursor yarn in a silk fibroin solution, taking it out, washing it with deionized water, and drying it to obtain the yarn; and weaving the yarn with an SM8-TOP2MP electronic seamless forming circular knitting machine to form an antibacterial, moisture-absorbing, and breathable fabric.

3. The method for preparing an antibacterial, moisture-absorbing and breathable fabric according to claim 2, characterized in that: The antibacterial microsphere precursor in step (1) is prepared by mixing 2-isopropenylthiazole, allyl glycidyl ether, N-vinyl pyrrolidone, N,N'-methylenebisacrylamide and deionized water in a mass ratio of 1: (0.2-0.4): (0.9-1.1): (1-3): (190-210), stirring at 80-90° C. and 200-400 rpm for 20-30 min, adding a potassium persulfate aqueous solution having a mass fraction of 0.21%-0.23% and a mass fraction of 20-30 times that of 2-isopropenylthiazole at a uniform rate within 35-45 min, continuing stirring for 2-4 h, separating with a dialysis bag with a molecular weight of 8000-14000 kDa for 2-4 days, freeze-drying for 11-13 h, and grinding and sieving to obtain the microsphere precursor.

4. The method for preparing an antibacterial, moisture-absorbing and breathable fabric according to claim 2, characterized in that: The antibacterial microspheres in step (2) are prepared by mixing zinc oxide, ammonium carbonate, ammonia water and deionized water in a mass ratio of 1: (2-4): (0.9-1.1): (9-11), and ultrasonically dispersing for 20-30 minutes to obtain a zinc oxide ammonia solution; the antibacterial microsphere precursor and deionized water are mixed in a mass ratio of 1: (150-250), and the zinc oxide ammonia solution of 11-13 times the mass of the antibacterial microsphere precursor is added at a constant speed at 55-65° C. for 1-2 hours, stirring at 300-400 rpm for 25-35 minutes, naturally cooling to room temperature, centrifuging, washing with deionized water for 3-5 times, and drying at 60-70° C. for 11-13 hours to obtain the obtained product.

5. The method for preparing an antibacterial, moisture-absorbing and breathable fabric according to claim 2, characterized in that: In step (3), 4,4-diisocyanate dicyclohexylmethane, N-butyldiethanolamine, bismuth neodecanoate and N,N-dimethylacetamide are mixed in a mass ratio of 1: (1.8-1.9): (0.01-0.03): (6-7), stirred at 100-200 rpm for 1-3 hours in a nitrogen atmosphere, deionized water in an amount of 30-40 times the mass of 4,4-diisocyanate dicyclohexylmethane is added, and the mixture is naturally cooled to room temperature and filtered and pelletized, and dried at 35-45° C. for 11-13 hours to obtain polyurethane pellets; spandex pellets, polyurethane pellets, antibacterial microspheres and polyethylene glycol 4000 are mixed in a mass ratio of 1: (0.1-0.3): (0.02-0.04): (0.02-0.03), and melt-spinned using a twin-screw extruder to obtain core spandex filaments.

6. The method for preparing an antibacterial, moisture-absorbing and breathable fabric according to claim 5, characterized in that: The process parameters of the melt spinning are: the temperature of the first zone of the screw is 155-165°C, the temperature of the second zone is 185-195°C, the temperature of the third zone is 190-200°C, the temperature of the fourth zone is 196-198°C, the metering pump frequency is 16-32HZ, the spinning temperature is 250-280°C, the side blowing temperature is 25-35°C, the side blowing speed is 0.1-0.3m / s, the side blowing humidity is 70-80%, the oil pump frequency is 5-10HZ, the winding speed is 500-800m / min, and the fineness is 20-30D.

7. The method for preparing an antibacterial, moisture-absorbing and breathable fabric according to claim 2, characterized in that: The precursor yarn in step (4) is made of pure cotton yarn and core spandex filament, which are twisted into core-spun yarn using a FA507B ring spinning machine under the conditions of a front roller gauge of 17-19 mm, a rear roller gauge of 44-46 mm, a spindle speed of 11000-13000 r / min, a draft multiple of 3-4, a yarn fineness of 25-35 Ne, a twist coefficient of 320-340, and a Z twist; and the core-spun yarn is immersed in 0.05-0.15 mol / L of sodium hydroxide aqueous solution, ultrasonicate for 55-65 minutes, add 11%-13% epichlorohydrin aqueous solution with a volume fraction of 55-65 times the mass of the core-spun yarn and 35%-45% sodium hydroxide solution with a mass fraction of 6-7 times the mass of the core-spun yarn, stir at 35-45°C and 150-250r / min for 2-3 hours, take out and wash with deionized water for 3-5 times, and dry at 60-70°C for 11-13 hours.

8. The method for preparing an antibacterial, moisture-absorbing and breathable fabric according to claim 2, characterized in that: The antibacterial, moisture-absorbing and breathable fabric in step (5) is prepared by immersing the precursor yarn in a silk protein solution, ultrasonically treating the solution at 60-70° C. for 2-4 hours, washing the solution with deionized water for 3-5 times, and drying the solution at 105-115° C. to obtain the yarn; the yarn is woven into a 300-400 g / m2 yarn using an SM8-TOP2MP electronic seamless forming circular knitting machine. 2 get.

9. The method for preparing an antibacterial, moisture-absorbing and breathable fabric according to claim 8, characterized in that: The silk fibroin solution is obtained by mixing silk fibroin, sodium hydroxide and deionized water in a mass ratio of 1: (0.3-0.5): (150-250).

10. A seamless underwear, characterized in that: The seamless underwear is cut from the antibacterial, moisture-absorbing and breathable fabric described in claim 1.

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