Durably antibacterial high-elastic shapewear fabric and preparation method thereof

Abstract

The invention discloses a durable antibacterial high-elastic shapewear fabric and a preparation method thereof, and relates to the technical field of fabrics. When the durable antibacterial high-elastic shapewear fabric is prepared, firstly, dihydric alcohol and dibasic ester are copolymerized to generate pre-modified polyester, and then the pre-modified polyester reacts with cyano-(3-thiophene propyl) acetate to generate modified polyester; secondly, enabling the pretreated mica sheet, phosphoric acid and epoxypropane to react to generate a pre-modified mica sheet, then enabling the pre-modified mica sheet to react with 2-amino-1H-benzimidazole-5-carboxylic acid, and then enabling the pre-modified mica sheet to react with 1, 3-bis (3-thiophene)-2-propylene-1-ketone to obtain a modified mica sheet; finally, the modified polyester and the modified mica sheet are blended and spun to prepare modified polyester, the modified polyester and spandex are blended and woven, and the durable antibacterial high-elastic shapewear fabric is obtained through thiophene finishing. The durable antibacterial high-elastic shapewear fabric prepared by the preparation method disclosed by the invention has good antibacterial, anti-aging and antistatic properties.

Description

Technical Field

[0001] The invention relates to the technical field of fabrics, in particular to a durable and antibacterial high-elastic body-shaping garment fabric and a preparation method thereof. Background Art

[0002] Shapewear is a type of clothing that achieves shaping, support or medical functions by fitting closely to the curves of the human body. Its core function relies on the high elasticity and fit of the fabric. Therefore, traditional shapewear mostly uses synthetic materials such as spandex, lycra, and polyester fiber.

[0003] However, with the expansion of shapewear usage scenarios (such as long-term wear, exercise, and high-temperature environments), its functional requirements have shifted from simple physical support to comprehensive performance improvement. Due to the tight design of shapewear, it is in close contact with the skin for a long time. Especially during exercise or high-temperature environments, the user is prone to sweating, and the surface of the fabric is prone to forming a humid environment, providing a breeding ground for bacteria. In addition, medical shapewear (such as postoperative recovery garments) needs to directly contact wounds or sensitive skin. If the fabric lacks antibacterial properties, it may increase the risk of infection. Therefore, developing long-lasting antibacterial functions has become the key to improving the hygiene and safety of shapewear. However, synthetic fibers commonly found in high-elastic fabrics (such as polyester and nylon) are prone to static electricity, which can easily accumulate due to friction in dry environments. Furthermore, ultraviolet radiation during outdoor exercise can degrade the synthetic fibers in shapewear, reducing its elasticity and strength. Therefore, combining anti-static and anti-UV features can both enhance comfort and extend the life of the fabric. Traditional high-elastic fabrics (such as polyester and polyurethane) are mostly flammable and burn quickly when exposed to fire. Therefore, flame retardancy is also a necessary requirement for shapewear fabrics in specific scenarios, ensuring that the fabric is not easily ignited or that combustion is delayed when exposed to flames. Modern shapewear users are increasingly diverse, with increasing demands for health, safety, and functionality. Therefore, developing composite fabrics that combine high elasticity with multiple functions has become an industry innovation direction. At the same time, ensuring the durability and comfort of each function has become a current research focus. Summary of the Invention

[0004] The purpose of the present invention is to provide a durable antibacterial high-elastic body-shaping garment fabric and a preparation method thereof, 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 solution: a method for preparing a durable antibacterial high-elastic shapewear fabric, comprising the following preparation steps: (1) reacting cyanoacetic acid and 3-(3-thienyl)-1-propanol to obtain cyano-(3-thienylpropyl)acetate; (2) Mix 4,4'-carbonylbis(methyl benzoate), dimethyl terephthalate, 1,4-butanediol, and stannous octoate, heat to 180-190°C under nitrogen protection and react for 2-3 hours, continue to heat to 240-250°C, react at 50 Pa for 2-3 hours, stop heating, introduce nitrogen to return to normal pressure, and obtain pre-modified polyester; (3) reacting the pre-modified polyester with cyano-(3-thienylpropyl)acetate to obtain a modified polyester; (4) Pre-treated mica sheets, phosphoric acid, and ethyl acetate are mixed, and propylene oxide is added dropwise for reaction to obtain pre-modified mica sheets; (5) reacting the pre-modified mica sheet with 2-amino-1H-benzimidazole-5-carboxylic acid to obtain a benzimidazole-based mica sheet; reacting the benzimidazole-based mica sheet with 1,3-di(3-thiophene)-2-propene-1-one to obtain a modified mica sheet; (6) Mixing the modified polyester and modified mica flakes, melt-blending them in a twin-screw extruder, extruding them into granules, and melt-spinning them through a spinning machine to obtain modified polyester, blending the modified polyester with spandex into composite yarn, and weaving them into fabrics; (7) Immerse the fabric in a mixture of ferric chloride and chloroform for 30-40 minutes; add thiophene and stir, then take it out and immerse it in a 1-1.5 mol / L hydrochloric acid solution and mix it. After taking it out, wash it with saturated sodium carbonate, wash it with pure water, and dry it to obtain a durable antibacterial and highly elastic body-shaping fabric.

[0006] As an optimization, the preparation method of cyano-(3-thienylpropyl)acetate in step (1) is as follows: cyanoacetic acid, 3-(3-thienyl)-1-propanol and concentrated sulfuric acid are mixed in a mass ratio of 1:(2.5-3.0):(0.05-0.06), heated to 110-120°C for reaction for 6-8h, cooled to room temperature, and distilled under reduced pressure. The pH is adjusted to 7 with saturated sodium carbonate, and the mixture is separated, washed with saturated sodium chloride solution, dried over anhydrous magnesium sulfate, and distilled under reduced pressure to obtain cyano-(3-thienylpropyl)acetate.

[0007] As an optimization, the molar ratio of 4,4'-carbonylbis(methyl benzoate), dimethyl terephthalate, 1,4-butanediol, and stannous octoate in step (2) is 1:(4-5):(5.5-6.0):(0.005-0.006).

[0008] As an optimization, the preparation method of the modified polyester in step (3) is as follows: pre-modified polyester, cyano-(3-thienylpropyl) acetate, and toluene-n-heptane solution are mixed, half of the p-toluenesulfonic acid solution is added under nitrogen protection, stirred for 30-40 minutes, heated to 100-110°C and refluxed for 2-3 hours, the remaining p-toluenesulfonic acid solution is added, and the reaction is continued for 5-6 hours. The modified polyester is precipitated with ice water, filtered, washed, and dried to obtain the modified polyester; the mass ratio of the pre-modified polyester, cyano-(3-thienylpropyl) acetate, toluene-n-heptane solution, and p-toluenesulfonic acid solution is 1:(0.6-0.7):(10-12):(1-1.2).

[0009] As an optimization, the toluene-n-heptane solution is obtained by mixing toluene and n-heptane in a volume ratio of (3-4):1; the p-toluenesulfonic acid solution is obtained by mixing p-toluenesulfonic acid and ethanol in a volume ratio of 1:(9-10).

[0010] As an optimization, the preparation method of the pre-modified mica sheet in step (4) is as follows: mica sheet and 1M hydrochloric acid are ultrasonically mixed at a mass ratio of 1: (10-12) for 30-40 minutes, filtered, washed and dried to obtain activated mica sheet; 3-(2,3-epoxypropoxy)propyltrimethoxysilane and pure water are mixed at a mass ratio of 1: (4-5), glacial acetic acid is used to adjust the pH to 4-5, stirred at 35-45 ° C for 1-2 hours, and vacuum distilled at 40 ° C for 20 minutes to obtain hydrolyzed siloxane; activated mica sheet, hydrolyzed siloxane, isopropanol are mixed at a mass ratio of 1: (0.5-0.7 ): (50-60) ultrasonically mixed for 20 minutes, 28wt% ammonia water was used to adjust the pH to 10, and the mixture was reacted at 70-80℃ for 5-6 hours, filtered, washed and dried to obtain pretreated mica sheets; the pretreated mica sheets, phosphoric acid and ethyl acetate were ultrasonically mixed at a mass ratio of 1: (4-5): (30-40) for 20-30 minutes, and propylene oxide with a mass of 1.5-2 times that of the phosphoric acid was added dropwise at a rate of 0.6mL / min at 20-25℃. After the addition was completed, the mixture was heated to 80-90℃, reacted for 3-4 hours, filtered, washed and dried to obtain pre-modified mica sheets.

[0011] As an optimization, the preparation method of the modified mica sheet in step (5) is as follows: pre-modified mica sheet, 2-amino-1H-benzimidazole-5-carboxylic acid, p-toluenesulfonic acid, N,N-dimethylformamide are mixed in a mass ratio of 1: (2-3): (0.4-0.5): (20-30), heated to 100-110 ° C and reacted for 7-8 hours, filtered, washed and dried to obtain benzimidazole-based mica sheet; benzimidazole-based mica sheet, 1,3-di(3-thiophene)-2-propene-1-one, ethanol, glacial acetic acid are mixed in a mass ratio of 1: (1.5-2.0): (40-50): (0.003-0.005), heated to 80-90 ° C, reacted for 10-12 hours, added ice water 3-4 times the volume of ethanol, filtered, washed and dried to obtain modified mica sheet.

[0012] As an optimization, the preparation method of the fabric in step (6) is as follows: modified polyester and modified mica flakes are mixed in a mass ratio of 1: (0.03-0.05), melt-blended in a twin-screw extruder, extruded into granules, and melt-spun by a spinning machine to obtain modified polyester, with a spinning temperature of 240-250°C, a winding speed of 700-800m / min, a drafting multiple of 1.5-2.0 times, and a modified polyester fineness of 16.7tex; the modified polyester and spandex are processed into composite yarns by an air-covered yarn machine in a ratio of (80-85): (15-20); the fabric is woven by a double-sided circular weft machine; the fabric has a gram weight of 150-160g / m².

[0013] As an optimization, the preparation method of the durable antibacterial and highly elastic body-shaping fabric in step (7) is as follows: the fabric, ferric chloride and chloroform are mixed at a mass ratio of 1: (12-15): (110-120) for 30-40 minutes; thiophene is added and stirred for 20-30 minutes at 20-30°C, and then taken out, immersed in a 1 mol / L hydrochloric acid solution and mixed for 10-20 minutes, with a bath ratio of 1: (60-80), and then washed with saturated sodium carbonate, washed with pure water, and dried to obtain a durable antibacterial and highly elastic body-shaping fabric; the molar ratio of thiophene to ferric chloride is 1: (4-4.5).

[0014] The present invention also provides a durable antibacterial high-elastic body-shaping garment fabric prepared according to the method for preparing the durable antibacterial high-elastic body-shaping garment fabric.

[0015] Compared with the prior art, the beneficial effects achieved by the present invention are as follows: when preparing a durable antibacterial high-elastic body-shaping garment fabric, the present invention first reacts cyanoacetic acid and 3-(3-thienyl)-1-propanol to generate cyano-(3-thienylpropyl) acetate; 4,4'-carbonylbis(methyl benzoate), dimethyl terephthalate, and 1,4-butanediol are copolymerized to generate a pre-modified polyester; and then the pre-modified polyester and cyano-(3-thienylpropyl) acetate are reacted to generate a modified polyester. The invention relates to a method for preparing a modified polyester by a pre-treated mica sheet, phosphoric acid and propylene oxide, which is then reacted with 2-amino-1H-benzimidazole-5-carboxylic acid to generate a benzimidazole-based mica sheet, which is then reacted with 1,3-di(3-thiophene)-2-propene-1-one to obtain a modified mica sheet. Finally, the modified polyester and the modified mica sheet are blended and spun to obtain a modified polyester, which is then blended with spandex and finished with thiophene to obtain a durable, antibacterial, and highly elastic body-shaping fabric.

[0016] First, cyanoacetic acid and 3-(3-thienyl)-1-propanol are subjected to an ester exchange reaction to generate cyano-(3-thienylpropyl) acetate, and 4,4'-carbonylbis(methyl benzoate), dimethyl terephthalate, and 1,4-butanediol are copolymerized to generate a pre-modified polyester, so that the polyester chain segment contains a benzophenone structure. A cyanoacrylate structure is generated through a condensation reaction of benzophenone and cyano-(3-thienylpropyl) acetate, and a thiophene functional group is introduced at the end of the structure. The conjugated double bond system of the cyanoacrylate structure can capture free radicals, inhibit photooxidative degradation, and give the fabric the ability to resist light aging; secondly, the mica sheet can quickly conduct body surface heat due to its layered structure and high thermal conductivity, which can give the fabric a cool feeling; the mica sheet containing epoxy functional groups on the surface undergoes a ring-opening reaction with phosphoric acid and propylene oxide to generate hydroxyphosphoric acid Ester structure, which can provide certain flame retardant properties for the fabric; hydroxy phosphate and amino-1H-benzimidazole-5-carboxylic acid are grafted onto the surface of mica sheets through ester exchange, and aminobenzimidazole groups and 1,3-di(3-thiophene)-2-propene-1-one containing a chalcone structure undergo an addition cyclization reaction to generate a nitrogen heterocyclic imidazole structure, which gives the fabric good antibacterial properties through protonation and introduces a thiophene structure; finally, the modified polyester and modified mica sheets are blended and spun to obtain modified polyester, and the modified polyester and spandex are blended and manufactured, and thiophene-treated to obtain a long-lasting antibacterial and highly elastic body-shaping fabric. The surface of the modified polyester contains a thiophene structure, which can be polymerized with a thiophene monomer under the action of a catalyst to generate polythiophene with antistatic properties. The polythiophene is chemically bonded to the surface of the fabric, and has better washing resistance. DETAILED DESCRIPTION

[0017] 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 embodiments described 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 efforts are within the scope of protection of the present invention.

[0018] The twin-screw extruder parameters described in the following examples and comparative examples are: zone 1: 220°C, zone 2: 240°C, zone 3: 250°C, die head: 255°C, screw speed 80 rpm; the spandex fineness is 4.4 tex; the mica sheet specification is 6 μm, purchased from Lingshou County Dinghong Mineral Products Processing Plant.

[0019] Example 1 A method for preparing a durable antibacterial high-elastic body-shaping garment fabric, the method comprising the following steps: (1) Cyanoacetic acid, 3-(3-thienyl)-1-propanol, and 98 wt% concentrated sulfuric acid were mixed in a mass ratio of 1:2.5:0.05, heated to 120°C for 8 h, cooled to room temperature, and then distilled under reduced pressure. The pH was adjusted to 7 with saturated sodium carbonate, and the mixture was separated, washed with saturated sodium chloride solution, dried over anhydrous magnesium sulfate, and distilled under reduced pressure to obtain cyano-(3-thienylpropyl)acetate. (2) 4,4'-carbonylbis(methyl benzoate), dimethyl terephthalate, 1,4-butanediol, and stannous octoate were mixed in a molar ratio of 1:4:5.5:0.005, heated to 190°C under nitrogen protection for reaction for 3 h, then heated to 250°C and reacted at 50 Pa for 3 h, then stopped heating and nitrogen was passed through to restore the pressure to normal to obtain a pre-modified polyester; (3) Pre-modified polyester, cyano-(3-thienylpropyl) acetate, and toluene-n-heptane solution were mixed, and half of the p-toluenesulfonic acid solution was added under nitrogen protection, stirred for 40 minutes, heated to 110°C and refluxed for 3 hours, and continued to react for 6 hours. The modified polyester was precipitated with ice water, filtered, washed, and dried to obtain the modified polyester. The mass ratio of the pre-modified polyester, cyano-(3-thienylpropyl) acetate, toluene-n-heptane solution, and p-toluenesulfonic acid solution was 1:0.6:10:1. The toluene-n-heptane solution was obtained by mixing toluene and n-heptane in a volume ratio of 3:1. The p-toluenesulfonic acid solution was obtained by mixing p-toluenesulfonic acid and ethanol in a volume ratio of 1:9. (4) Mix mica flakes and 1M hydrochloric acid in a mass ratio of 1:10 by ultrasonic mixing for 40 minutes, filter, wash and dry to obtain activated mica flakes; mix 3-(2,3-epoxypropoxy)propyltrimethoxysilane and pure water in a mass ratio of 1:4, adjust the pH to 4 with glacial acetic acid, stir at 35℃ for 1 hour, and distill at 40℃ under reduced pressure for 20 minutes to obtain hydrolyzed siloxane; mix activated mica flakes, hydrolyzed siloxane and isopropanol in a mass ratio of 1:0.5:50 by ultrasonic mixing for 20 minutes, adjust the pH to 10 with 28wt% ammonia water, react at 80℃ for 6 hours, filter, wash and dry to obtain pretreated mica flakes; mix pretreated mica flakes, phosphoric acid and ethyl acetate in a mass ratio of 1:4:30, ultrasonically mix for 30 minutes, add propylene oxide 1.5 times the mass of phosphoric acid at 0.6mL / min at 25℃, heat to 90℃ after the addition, react for 4 hours, filter, wash and dry to obtain pre-modified mica flakes; (5) Pre-modified mica flakes, 2-amino-1H-benzimidazole-5-carboxylic acid, p-toluenesulfonic acid, and N,N-dimethylformamide were mixed in a mass ratio of 1:2:0.4:20, heated to 110°C for reaction for 8 hours, filtered, washed, and dried to obtain benzimidazole-based mica flakes; benzimidazole-based mica flakes, 1,3-di(3-thiophene)-2-propene-1-one, ethanol, and glacial acetic acid were mixed in a mass ratio of 1:1.5:40:0.003, heated to 90°C, reacted for 12 hours, and ice water 4 times the volume of ethanol was added, filtered, washed, and dried to obtain modified mica flakes; (6) Modified polyester and modified mica flakes were mixed in a mass ratio of 1:0.03, melt-blended in a twin-screw extruder, extruded into granules, and melt-spun through a spinning machine to obtain modified polyester. The spinning temperature was 250°C, the winding speed was 800m / min, the draft ratio was 2.0 times, and the modified polyester fineness was 16.7tex; the modified polyester and spandex were processed into composite yarns in a ratio of 85:15 through an air-covered yarn machine; and the fabric was woven using a double-sided circular weft machine. The fabric weight was 160g / m². (7) The fabric, ferric chloride and chloroform were mixed in a mass ratio of 1:12:110 for 40 minutes; thiophene was added and stirred for 30 minutes at 30°C, then taken out and immersed in a 1.5 mol / L hydrochloric acid solution and mixed for 20 minutes. The bath ratio was 1:60. After taking out, it was washed with saturated sodium carbonate, washed with pure water and dried to obtain a durable antibacterial and highly elastic body-shaping fabric; the molar ratio of thiophene to ferric chloride was 1:4.

[0020] Example 2 A method for preparing a durable antibacterial high-elastic body-shaping garment fabric, the method comprising the following steps: (1) Cyanoacetic acid, 3-(3-thienyl)-1-propanol, and 98 wt% concentrated sulfuric acid were mixed in a mass ratio of 1:2.6:0.05, heated to 115°C for 7 h, cooled to room temperature, and distilled under reduced pressure. The pH was adjusted to 7 using saturated sodium carbonate, and the mixture was separated, washed with saturated sodium chloride solution, dried over anhydrous magnesium sulfate, and distilled under reduced pressure to obtain cyano-(3-thienylpropyl)acetate; (2) 4,4'-carbonyl bis(methyl benzoate), dimethyl terephthalate, 1,4-butanediol, and stannous octoate were mixed, heated to 185°C under nitrogen protection and reacted for 3 hours, then heated to 245°C and reacted at 50 Pa for 2.5 hours, then heating was stopped and nitrogen was introduced to return the pressure to normal to obtain a pre-modified polyester; the molar ratio of 4,4'-carbonyl bis(methyl benzoate), dimethyl terephthalate, 1,4-butanediol, and stannous octoate was 1:4.5:5.7:0.005; (3) The pre-modified polyester, cyano-(3-thienylpropyl) acetate, and toluene-n-heptane solution were mixed, and half of the p-toluenesulfonic acid solution was added under nitrogen protection, stirred for 35 minutes, heated to 105°C and refluxed for 2.5 hours, and the remaining p-toluenesulfonic acid solution was added, and the reaction was continued for 5.5 hours. The modified polyester was precipitated with ice water, filtered, washed, and dried to obtain the modified polyester; the mass ratio of the pre-modified polyester, cyano-(3-thienylpropyl) acetate, toluene-n-heptane solution, and p-toluenesulfonic acid solution was 1:0.65:11:1.1; the toluene-n-heptane solution was obtained by mixing toluene and n-heptane in a volume ratio of 3.5:1; the p-toluenesulfonic acid solution was obtained by mixing p-toluenesulfonic acid and ethanol in a volume ratio of 1:9.5; (4) Mica flakes and 1M hydrochloric acid were ultrasonically mixed at a mass ratio of 1:11 for 35 minutes, filtered, washed, and dried to obtain activated mica flakes; 3-(2,3-epoxypropoxy)propyltrimethoxysilane and pure water were mixed at a mass ratio of 1:4.5, the pH was adjusted to 4.5 with glacial acetic acid, stirred at 30°C for 1.5 hours, and vacuum distilled at 40°C for 20 minutes to obtain hydrolyzed siloxane; activated mica flakes, hydrolyzed siloxane, and isopropanol were ultrasonically mixed at a mass ratio of 1:0.6:55. The mixture was mixed for 20 minutes, the pH was adjusted to 10 with 28wt% ammonia water, and the mixture was reacted at 75°C for 5.5 hours. The mixture was filtered, washed, and dried to obtain pretreated mica sheets. The pretreated mica sheets, phosphoric acid, and ethyl acetate were ultrasonically mixed at a mass ratio of 1:4.5:35 for 25 minutes. Propylene oxide (1.7 times the mass of phosphoric acid) was added dropwise at a rate of 0.6mL / min at 23°C. After the addition was completed, the mixture was heated to 85°C and reacted for 3.5 hours. The mixture was filtered, washed, and dried to obtain pre-modified mica sheets. (5) Pre-modified mica flakes, 2-amino-1H-benzimidazole-5-carboxylic acid, p-toluenesulfonic acid, and N,N-dimethylformamide were mixed in a mass ratio of 1:2.5:0.45:25, heated to 107°C for reaction for 7.5 hours, filtered, washed, and dried to obtain benzimidazole-based mica flakes; benzimidazole-based mica flakes, 1,3-di(3-thiophene)-2-propene-1-one, ethanol, and glacial acetic acid were mixed in a mass ratio of 1:1.7:45:0.004, heated to 85°C, reacted for 11 hours, and ice water 3.5 times the volume of ethanol was added. The mixture was filtered, washed, and dried to obtain modified mica flakes; (6) Modified polyester and modified mica flakes were mixed in a mass ratio of 1:0.04, melt-blended in a twin-screw extruder, extruded into granules, and melt-spun through a spinning machine to obtain modified polyester. The spinning temperature was 245°C, the winding speed was 750m / min, the draft ratio was 1.7 times, and the modified polyester fineness was 16.7tex; the modified polyester and spandex were processed into composite yarns in a ratio of 83:17 through an air-covered yarn machine; and the fabric was woven using a double-sided circular weft machine. The fabric weight was 155g / m². (7) The fabric, ferric chloride and chloroform were mixed in a mass ratio of 1:13:115 for 35 minutes; thiophene was added and stirred for 25 minutes at 25°C, then taken out and immersed in a 1.3 mol / L hydrochloric acid solution and mixed for 15 minutes. The bath ratio was 1:70. After taking out, it was washed with saturated sodium carbonate, washed with pure water and dried to obtain a durable antibacterial and highly elastic body-shaping fabric; the molar ratio of thiophene to ferric chloride was 1:4.3.

[0021] Example 3 A method for preparing a durable antibacterial high-elastic body-shaping garment fabric, the method comprising the following steps: (1) Cyanoacetic acid, 3-(3-thienyl)-1-propanol, and 98 wt% concentrated sulfuric acid were mixed in a mass ratio of 1:3.0:0.06, heated to 110°C for 6 h, cooled to room temperature, and distilled under reduced pressure. The pH was adjusted to 7 using saturated sodium carbonate, and the mixture was separated, washed with saturated sodium chloride solution, dried over anhydrous magnesium sulfate, and distilled under reduced pressure to obtain cyano-(3-thienylpropyl)acetate; (2) 4,4'-carbonyl bis(methyl benzoate), dimethyl terephthalate, 1,4-butanediol, and stannous octoate were mixed, heated to 180°C under nitrogen protection for 2 h, then heated to 240°C and reacted at 50 Pa for 2 h. The heating was stopped, and nitrogen was introduced to return the pressure to normal to obtain a pre-modified polyester; the molar ratio of 4,4'-carbonyl bis(methyl benzoate), dimethyl terephthalate, 1,4-butanediol, and stannous octoate was 1:5:6.0:0.006; (3) Pre-modified polyester, cyano-(3-thienylpropyl) acetate, and toluene-n-heptane solution were mixed, and half of the p-toluenesulfonic acid solution was added under nitrogen protection. The mixture was stirred for 30 minutes, heated to 100°C and refluxed for 2 hours. The remaining p-toluenesulfonic acid solution was added and the reaction was continued for 5 hours. The mixture was precipitated with ice water, filtered, washed, and dried to obtain a modified polyester. The mass ratio of the pre-modified polyester, cyano-(3-thienylpropyl) acetate, toluene-n-heptane solution, and p-toluenesulfonic acid solution was 1:0.6:10:1. The toluene-n-heptane solution was obtained by mixing toluene and n-heptane in a volume ratio of 4:1. The p-toluenesulfonic acid solution was obtained by mixing p-toluenesulfonic acid and ethanol in a volume ratio of 1:10. (4) Mica flakes and 1M hydrochloric acid were ultrasonically mixed at a mass ratio of 1:12 for 30 minutes, filtered, washed, and dried to obtain activated mica flakes; 3-(2,3-epoxypropoxy)propyltrimethoxysilane and pure water were mixed at a mass ratio of 1:5, the pH was adjusted to 5 with glacial acetic acid, stirred at 35°C for 1 hour, and vacuum distilled at 40°C for 20 minutes to obtain hydrolyzed siloxane; activated mica flakes, hydrolyzed siloxane, and isopropanol were ultrasonically mixed at a mass ratio of 1:0.7:60. The mixture was mixed for 20 minutes, the pH was adjusted to 10 using 28 wt% ammonia water, and the mixture was reacted at 70°C for 5 hours. The mixture was filtered, washed, and dried to obtain pretreated mica sheets. The pretreated mica sheets, phosphoric acid, and ethyl acetate were ultrasonically mixed at a mass ratio of 1:5:40 for 20 minutes. At 20°C, propylene oxide (2 times the mass of the phosphoric acid) was added dropwise at a rate of 0.6 mL / min. After the addition was completed, the mixture was heated to 80°C and reacted for 3 hours. The mixture was filtered, washed, and dried to obtain pre-modified mica sheets. (5) Pre-modified mica flakes, 2-amino-1H-benzimidazole-5-carboxylic acid, p-toluenesulfonic acid, and N,N-dimethylformamide were mixed in a mass ratio of 1:3:0.5:30, heated to 100°C and reacted for 7 hours, filtered, washed, and dried to obtain benzimidazole-based mica flakes; benzimidazole-based mica flakes, 1,3-di(3-thiophene)-2-propene-1-one, ethanol, and glacial acetic acid were mixed in a mass ratio of 1:2.0:50:0.005, heated to 80°C, reacted for 10 hours, and ice water 4 times the volume of ethanol was added. The mixture was filtered, washed, and dried to obtain modified mica flakes. (6) Modified polyester and modified mica flakes were mixed in a mass ratio of 1:0.05, melt-blended in a twin-screw extruder, extruded into granules, and melt-spun through a spinning machine to obtain modified polyester. The spinning temperature was 240°C, the winding speed was 700 m / min, the draft ratio was 1.5 times, and the modified polyester fineness was 16.7 tex; the modified polyester and spandex were processed into composite yarns in a ratio of 80:20 through an air-covered yarn machine; and the fabric was woven using a double-sided circular weft machine. The fabric weight was 150 g / m². (7) The fabric, ferric chloride and chloroform were mixed at a mass ratio of 1:15:120 for 30 minutes; thiophene was added and stirred for 20 minutes at 20°C, then taken out and immersed in a 1 mol / L hydrochloric acid solution and mixed for 10 minutes. The bath ratio was 1:70. After taking out, it was washed with saturated sodium carbonate, washed with pure water and dried to obtain a durable antibacterial and highly elastic body-shaping fabric; the molar ratio of thiophene to ferric chloride was 1:4.5.

[0022] Comparative Example 1: The method for preparing the durable antibacterial high-elastic body-shaping fabric of Comparative Example 1 differs from that of Example 2 in that the pre-modified polyester is not subjected to the next step of modification, specifically, steps (1) to (2) are not included, and step (6) is modified as follows: the pre-modified polyester and the modified mica flakes are mixed in a mass ratio of 1:0.04, melt-blended in a twin-screw extruder, extruded into granules, and melt-spun through a spinning machine to obtain modified polyester, with a spinning temperature of 245°C, a winding speed of 750m / min, a draft ratio of 1.7 times, and a modified polyester fineness of 16.7tex; the modified polyester and spandex are processed into composite yarns in a ratio of 83:17 through an air-covered yarn machine; and the fabric is woven using a double-sided circular weft machine, with a fabric weight of 160g / m². The remaining steps are the same as those of Example 2.

[0023] Comparative Example 2: The preparation method of the durable antibacterial high-elastic body-shaping fabric of Comparative Example 2 differs from that of Example 2 in that the pre-modified mica flakes are not modified, specifically, step (5) is not included, and step (6) is modified as follows: the modified polyester and the pre-modified mica flakes are mixed in a mass ratio of 1:0.04, melt-blended in a twin-screw extruder, extruded into granules, and melt-spun through a spinning machine to obtain modified polyester, with a spinning temperature of 245°C, a winding speed of 750m / min, a draft ratio of 1.7 times, and a modified polyester fineness of 16.7tex; the modified polyester and spandex are processed into composite yarns in a ratio of 83:17 through an air-covered yarn machine; and the fabric is woven using a double-sided circular weft machine, with a fabric weight of 155g / m². The remaining steps are the same as those of Example 2.

[0024] Comparative Example 3: The preparation method of the durable antibacterial high-elastic body-shaping fabric of Comparative Example 3 is different from that of Example 2 in that the pre-modified polyester is not modified in the next step and the pre-modified mica sheet is not modified. Specifically, step (6) is modified as follows: the pre-modified polyester and the pre-modified mica sheet are mixed in a mass ratio of 1:0.04, melt-blended in a twin-screw extruder, extruded into granules, and melt-spun by a spinning machine to obtain modified polyester, the spinning temperature is 245°C, the winding speed is 750m / min, the drafting multiple is 1.7 times, and the modified polyester fineness is 16.7tex; the modified polyester and spandex are processed into composite yarns by an air-covered yarn machine in a ratio of 83:17; the fabric is woven by a double-sided circular weft machine, and the fabric weight is 150g / m²; and a durable antibacterial high-elastic body-shaping fabric is obtained.

[0025] Test Example 1: Antibacterial performance test: Test method: The antibacterial rate of the fabrics prepared in the examples and comparative examples was tested according to GB / T20944.2-2007. The results are shown in Table 1.

[0026]

[0027] From the comparison of the experimental data of Examples 1 to 3 and Comparative Examples 1 to 3 in Table 1, it can be found that the fabric prepared by the present invention has good antibacterial properties.

[0028] By comparison, the antibacterial rates of Examples 1 to 3 are greater than those of Comparative Examples 2 to 3, indicating that hydroxyphosphate and 2-amino-1H-benzimidazole-5-carboxylic acid are grafted onto the surface of the mica sheet through ester exchange to form aminobenzimidazole groups, and aminobenzimidazole groups and 1,3-di(3-thiophene)-2-propene-1-one containing a chalcone structure undergo an addition reaction to generate an azole structure containing a heteroatom, which imparts good antibacterial properties to the fabric through protonation.

[0029] Test Example 2: Antistatic performance test: Test method: Fabric surface charge density was measured according to the standard GB / T12703-1991, "Test method for electrostatic discharge of textiles." The results are shown in Table 2.

[0030] Washing resistance test: Test Method: The fabrics prepared in the Examples and Comparative Examples were machine washed 20 times in accordance with the standard GB / T 8629-2017. After drying, the fabrics were tested according to the antistatic performance test method. The results are shown in Table 2.

[0031]

[0032] From the comparison of the experimental data of Examples 1 to 3 and Comparative Examples 1 to 3 in Table 2, it can be found that the fabric prepared by the present invention has good antistatic performance and durability.

[0033] By comparison, Examples 1 to 3 have good antistatic properties, and the washability of Examples 1 to 3 is better than that of Comparative Examples 1 to 3. Both the Examples and the Comparative Examples have antistatic properties before washing. After washing, the antistatic properties of the Comparative Examples decrease to varying degrees, indicating that modified polyester and modified mica sheets are blended and spun to prepare modified polyester, and modified polyester and spandex are blended and thiophene-treated to obtain a durable antibacterial, high-elastic body-shaping fabric. The surface of the modified polyester contains a thiophene structure, which can be polymerized with a thiophene monomer under the action of a catalyst to generate polythiophene with antistatic properties. The polythiophene is chemically bonded to the surface of the fabric, and has better washability.

[0034] Test Example 3: Test of anti-light aging performance: Test method: Antioxidant performance test was carried out according to the national standard GB / T 16422.3-2022; the sample was irradiated with ultraviolet light at 70°C with an irradiation intensity of 0.76W / (m 2 nm), the power of the UV lamp was 40 W, the irradiation time was 7 days, and the tensile strength was tested after the irradiation, and the tensile strength retention rate was calculated. The tensile strength was tested using the shear strip method according to ASTM D5035-1995 (2003); the results are shown in Table 3.

[0035]

[0036] From the comparison of the experimental data of Examples 1 to 3 and Comparative Examples 1 to 3 in Table 3, it can be found that the moisture-absorbing and perspiration-wicking polyester-ammonia blended antibacterial fabric prepared by the present invention has good anti-light aging performance.

[0037] By comparison, the light aging resistance of Examples 1 to 3 is better than that of Comparative Examples 1 and 2, indicating that cyanoacetic acid and 3-(3-thienyl)-1-propanol are subjected to an ester exchange reaction to generate cyano-(3-thienylpropyl) acetate, and 4,4'-carbonylbis(methyl benzoate), dimethyl terephthalate, and 1,4-butanediol are copolymerized to generate a pre-modified polyester, so that the polyester segment contains a benzophenone structure, and a cyanoacrylate structure is generated through a condensation reaction of benzophenone and cyano-(3-thienylpropyl) acetate, and a thiophene functional group is introduced at the end of the structure. The conjugated double bond system of the cyanoacrylate structure can capture free radicals, inhibit photooxidative degradation, and impart light aging resistance to the fabric.

[0038] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above and that the invention can be embodied in other specific forms without departing from the spirit or essential characteristics of the invention. Therefore, the embodiments should be considered in all respects as illustrative and non-restrictive, and the scope of the invention is defined by the appended claims, not the foregoing description, and all variations within the meaning and range of equivalents of the claims are intended to be encompassed therein. Any reference in a claim should not be construed as limiting the claim to which it relates.

Claims

1. A method for preparing a durable antibacterial high-elastic body-shaping garment fabric, characterized in that: The method comprises the following preparation steps: (1) reacting cyanoacetic acid and 3-(3-thienyl)-1-propanol to obtain cyano-(3-thienylpropyl)acetate; (2) Mix 4,4'-carbonylbis(methyl benzoate), dimethyl terephthalate, 1,4-butanediol, and stannous octoate, heat to 180-190°C under nitrogen protection and react for 2-3 hours, continue to heat to 240-250°C, react at 50 Pa for 2-3 hours, stop heating, introduce nitrogen to return to normal pressure, and obtain pre-modified polyester; (3) reacting the pre-modified polyester with cyano-(3-thienylpropyl)acetate to obtain a modified polyester; (4) Pre-treated mica sheets, phosphoric acid, and ethyl acetate are mixed, and propylene oxide is added dropwise for reaction to obtain pre-modified mica sheets; (5) reacting the pre-modified mica sheet with 2-amino-1H-benzimidazole-5-carboxylic acid to obtain a benzimidazole-based mica sheet; reacting the benzimidazole-based mica sheet with 1,3-di(3-thiophene)-2-propene-1-one to obtain a modified mica sheet; (6) Mixing the modified polyester and modified mica flakes, melt-blending them in a twin-screw extruder, extruding them into granules, and melt-spinning them through a spinning machine to obtain modified polyester, blending the modified polyester with spandex into composite yarn, and weaving them into fabrics; (7) Immerse the fabric in a mixture of ferric chloride and chloroform for 30-40 minutes; add thiophene and stir, then take it out and immerse it in a 1-1.5 mol / L hydrochloric acid solution and mix it. After taking it out, wash it with saturated sodium carbonate, wash it with pure water, and dry it to obtain a durable antibacterial and highly elastic body-shaping fabric.

2. The method for preparing a durable antibacterial high-elastic body-shaping garment fabric according to claim 1, characterized in that: The preparation method of cyano-(3-thienylpropyl)acetate in step (1) is as follows: cyanoacetic acid, 3-(3-thienyl)-1-propanol, and concentrated sulfuric acid are mixed and reacted in a mass ratio of 1:(2.5-3.0):(0.05-0.06) to obtain cyano-(3-thienylpropyl)acetate.

3. The method for preparing a durable antibacterial high-elastic body-shaping garment fabric according to claim 1, characterized in that: The molar ratio of 4,4'-carbonylbis(methyl benzoate), dimethyl terephthalate, 1,4-butanediol and stannous octoate in step (2) is 1:(4-5):(5.5-6.0):(0.005-0.006).

4. The method for preparing a durable antibacterial high-elastic body-shaping garment fabric according to claim 1, characterized in that: The preparation method of the modified polyester in step (3) is as follows: pre-modified polyester, cyano-(3-thienylpropyl) acetate, toluene-n-heptane solution, and p-toluenesulfonic acid solution are mixed and reacted to obtain the modified polyester; the mass ratio of the pre-modified polyester, cyano-(3-thienylpropyl) acetate, toluene-n-heptane solution, and p-toluenesulfonic acid solution is 1:(0.6-0.7):(10-12):(1-1.2).

5. The method for preparing a durable antibacterial high-elastic body-shaping garment fabric according to claim 1, characterized in that: The preparation method of the pre-modified mica sheet in step (4) is as follows: mica sheets and hydrochloric acid are mixed in a mass ratio of 1: (10-12) to obtain activated mica sheets; 3-(2,3-epoxypropoxy)propyltrimethoxysilane and pure water are mixed in a mass ratio of 1: (4-5) at pH 4-5 to obtain hydrolyzed siloxane; activated mica sheets, hydrolyzed siloxane and isopropanol are mixed in a mass ratio of 1: (0.5-0.7): (50-60) at pH = 10 to obtain pretreated mica sheets; pretreated mica sheets, phosphoric acid and ethyl acetate are mixed in a mass ratio of 1: (4-5): (30-40) to react for 20-30 minutes, and propylene oxide with a mass of 1.5-2 times the mass of phosphoric acid is added dropwise to react to obtain pre-modified mica sheets.

6. The method for preparing a durable antibacterial high-elastic body-shaping garment fabric according to claim 1, characterized in that: The preparation method of the modified mica sheet in step (5) is as follows: pre-modified mica sheet, 2-amino-1H-benzimidazole-5-carboxylic acid, p-toluenesulfonic acid, and N,N-dimethylformamide are mixed in a mass ratio of 1: (2-3): (0.4-0.5): (20-30) to obtain benzimidazole-based mica sheet; benzimidazole-based mica sheet, 1,3-di(3-thiophene)-2-propene-1-one, ethanol, and glacial acetic acid are mixed in a mass ratio of 1: (1.5-2.0): (40-50): (0.003-0.005) to obtain modified mica sheet.

7. The method for preparing a durable antibacterial high-elastic body-shaping garment fabric according to claim 1, characterized in that: The preparation method of the fabric in step (6) is as follows: modified polyester and modified mica flakes are mixed in a mass ratio of 1:(0.03-0.05), melt-blended in a twin-screw extruder, extruded into granules, and melt-spun through a spinning machine to obtain modified polyester, with a spinning temperature of 240-250°C, a winding speed of 700-800m / min, a draft ratio of 1.5-2.0 times, and a modified polyester fineness of 16.7tex; The modified polyester and spandex are processed into composite yarns in a ratio of (80-85):(15-20) through an air-covered yarn machine; the composite yarns are woven into fabrics using a double-sided circular weft machine; and the fabrics have a grammage of 150-160 g / m².

8. The method for preparing a durable antibacterial high-elastic body-shaping garment fabric according to claim 1, characterized in that: The preparation method of the durable antibacterial and highly elastic body-shaping fabric in step (7) is as follows: the fabric, ferric chloride and chloroform are mixed at a mass ratio of 1: (12-15): (110-120) for 30-40 minutes; thiophene is added and stirred at 20-30°C for 20-30 minutes, and then taken out, immersed in a 1 mol / L hydrochloric acid solution and mixed for 10-20 minutes, with a bath ratio of 1: (60-80), and then washed with saturated sodium carbonate, washed with pure water, and dried to obtain the durable antibacterial and highly elastic body-shaping fabric; the molar ratio of thiophene to ferric chloride is 1: (4-4.5).

9. The method for preparing a durable antibacterial high-elastic body-shaping garment fabric according to claim 4, characterized in that The volume ratio of toluene to n-heptane in the toluene-n-heptane solution is (3-4):1; the volume ratio of p-toluenesulfonic acid to ethanol in the p-toluenesulfonic acid solution is 1:(9-10).

10. A durable antibacterial high-elastic body-shaping garment fabric prepared according to the method for preparing a durable antibacterial high-elastic body-shaping garment fabric according to any one of claims 1 to 9.

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