A bamboo fiber-containing moisture-absorbing and quick-drying antibacterial composite fabric and a preparation process thereof

Abstract

The application provides a bamboo fiber-containing moisture-absorbing, quick-drying and antibacterial composite fabric and a preparation process thereof, and belongs to the technical field of fabrics; the composite fabric comprises an inner layer fabric, a core layer fabric and an outer layer fabric. In the application, 2-morpholinoethyl methacrylate is mixed with bromododecane to perform a nucleophilic substitution reaction to generate an antibacterial modifier; the antibacterial modifier is dissolved in an ethanol solution, then the plasma-activated polypropylene fiber fabric is soaked, and the free radical polymerization reaction of the antibacterial modifier and the polypropylene fiber fabric is initiated by potassium persulfate, so that the antibacterial modifier is connected to the surface of the polypropylene fiber fabric; meanwhile, a three-dimensional network is formed through cross-linking of a cross-linking agent N,N'-methylenebisacrylamide, so that the polypropylene fiber has a long-acting antibacterial effect, and the prepared inner layer fabric is helpful to inhibit the breeding of bacteria and reduce peculiar smell caused by sweat.

Description

Technical Field

[0001] This invention relates to the field of fabric technology, specifically to a moisture-wicking, quick-drying, and antibacterial composite fabric containing bamboo fiber and its preparation process. Background Technology

[0002] Composite fabrics are multi-layer composite materials made by bonding and laminating multiple layers of textile materials and functional materials. Conventional fabrics usually do not have antibacterial properties, and their surfaces are prone to adsorbing bacteria, causing fabric contamination and fiber damage. However, bamboo fiber contains active ingredients such as bamboo quinone, which has a certain antibacterial effect and also has a good moisture absorption and wicking effect. Blending it with conventional fibers can give the fabric certain antibacterial and moisture absorption and wicking properties.

[0003] Cotton fabric is a commonly used skin-friendly inner layer fabric. It has good hydrophilicity and can quickly absorb sweat produced by the human body. However, cotton fibers swell when wet and have poor water evaporation and moisture dissipation capabilities, making it difficult for moisture to quickly diffuse to the outer surface of the fabric. This is not conducive to the quick-drying effect of the fabric and causes it to stick to the skin. Polypropylene fiber, on the other hand, has almost zero moisture absorption but has extremely strong water wicking properties. Replacing cotton fabric with polypropylene fiber as a raw material for the preparation of sportswear inner layer fabric can quickly wick away sweat and prevent it from sticking to the skin. However, polypropylene fiber fabric does not have antibacterial properties. When contaminated by human sweat, sebum secretions, and dander, it can cause problems such as mold growth and odor, which greatly affects the comfort of wearing it.

[0004] Polyester fiber, due to its high strength, good elasticity, and wear resistance, can be used in sportswear as an outer wear-resistant material. However, due to the lack of hydrophilic groups, its moisture absorption performance is poor, which makes it difficult to absorb sweat in time, easily causing a stuffy feeling and hindering the moisture absorption, sweat wicking, and quick drying of sportswear.

[0005] Therefore, it is necessary to propose a moisture-wicking, quick-drying, and antibacterial composite fabric containing bamboo fiber and its preparation process to improve the wearing comfort of sportswear. Summary of the Invention

[0006] To address the shortcomings of existing technologies, the present invention aims to provide a moisture-wicking, quick-drying, and antibacterial composite fabric containing bamboo fiber and its preparation process.

[0007] A moisture-wicking, quick-drying, and antibacterial composite fabric containing bamboo fiber, comprising an inner fabric, a core fabric, and an outer fabric.

[0008] The core fabric is made of a blend of pretreated bamboo fiber and polypropylene fiber, while the outer fabric is made of a blend of pretreated bamboo fiber and reinforced hydrophilic modified polyester fiber.

[0009] A preparation process for a moisture-wicking, quick-drying, and antibacterial composite fabric containing bamboo fiber, characterized by comprising the following steps:

[0010] S1: Preparing the inner layer fabric

[0011] An antibacterial modifier was prepared by mixing and reacting 2-morpholinoethyl methacrylate and bromododecane. The antibacterial modifier was then dissolved in an ethanol solution and impregnated into a pretreated polypropylene fiber fabric. Potassium persulfate and N,N'-methylenebisacrylamide were then added to react and the inner fabric was obtained.

[0012] S2: Reinforced hydrophilic modified polyester fiber

[0013] Tetramethylammonium chloride and citric acid were mixed to prepare a transparent homogeneous liquid, which was then immersed in pretreated polyester fibers for treatment. The fibers were then reinforced with a polyacrylic acid solution to obtain reinforced hydrophilic modified polyester fibers.

[0014] S3: Prepare the outer layer fabric and the core layer fabric.

[0015] Bamboo fibers are pretreated, and then the pretreated bamboo fibers are blended with the above-mentioned reinforced hydrophilic modified polyester fibers to obtain the outer layer fabric. The pretreated bamboo fibers are blended with polypropylene fibers to obtain the core layer fabric.

[0016] S4: Adhesion

[0017] The inner layer fabric, core layer fabric and outer layer fabric are bonded together to obtain a moisture-wicking, quick-drying and antibacterial composite fabric.

[0018] Furthermore, S1 specifically includes the following steps:

[0019] S1.1: Place the polypropylene fiber fabric in a 5% sodium hydroxide solution, soak it at 50-60℃ for 20-30 minutes, wash it with deionized water until neutral and dry it, and then treat it with a plasma treatment instrument for 2-3 minutes to activate the surface and obtain the pretreated polypropylene fiber fabric.

[0020] S1.2: Add 2-morpholinoethyl methacrylate to anhydrous ethanol at a mass ratio of 1:(4-6), stir and mix thoroughly, then add hydroquinone and heat at 50-60℃ for 10-20 min, then add dodecane bromodropwise, heat and stir at 80-90℃ for 6-8 h, and obtain the antibacterial modifier by rotary evaporation, precipitation of unreacted material with acetone, filtration and vacuum drying;

[0021] S1.3: Add the above antibacterial modifier to a 25% ethanol solution at a solid-liquid ratio of 1g:(20-30)mL, stir and dissolve thoroughly, then add the above pretreated polypropylene fiber fabric at a bath ratio of 1:(20-25), fully immerse it, add potassium persulfate and N,N'-methylenebisacrylamide, and heat and stir at 60-80℃ for 2-4 hours under nitrogen protection. Take it out, roll off the excess liquid and vacuum dry to obtain the inner layer fabric.

[0022] Furthermore, S2 specifically includes the following steps:

[0023] S2.1: Immerse polyester fibers in an aqueous solution containing 1% sodium hydroxide and 0.5% sodium dodecyl sulfate, treat at 70-80℃ for 20-30 minutes, then wash with deionized water until neutral and dry to obtain pretreated polyester fibers.

[0024] S2.2: Mix tetramethylammonium chloride and citric acid in a molar ratio of 1:(1-2) and stir at 70-80℃ for 40-50 min to obtain a transparent homogeneous liquid;

[0025] S2.3: Immerse the pretreated polyester fiber in the transparent homogeneous liquid at a bath ratio of 1:(20-30), stir at a constant temperature of 70-80℃ for 90-120 minutes, remove it, soak it in ice ethanol at -10℃ for 3-5 minutes, and then ultrasonically clean it with ethanol and deionized water for 10-20 minutes in sequence to obtain hydrophilic modified polyester fiber.

[0026] S2.4: Immerse the above-mentioned hydrophilic modified polyester fiber in a 0.5% polyacrylic acid solution, heat it at 40-50℃ for 30-40 minutes, remove it, and then heat-cur it at 110-120℃ for 10-20 minutes to obtain reinforced hydrophilic modified polyester fiber.

[0027] Furthermore, S3 specifically includes the following steps:

[0028] S3.1: Soak bamboo fibers in an aqueous solution containing cellulase and xylanase at a bath ratio of 1:(20-30) and treat at 40-50℃ for 2-3 hours. After taking them out, soak them in a 5% glycerol solution at 50-60℃ for 20-30 minutes to obtain pretreated bamboo fibers.

[0029] S3.2: The pretreated bamboo fiber and the reinforced hydrophilic modified polyester fiber obtained in step S2.4 are blended at a mass ratio of 1:(2-3) to obtain the outer fabric.

[0030] S3.3: The pretreated bamboo fiber and polypropylene fiber are blended at a mass ratio of 1:(2-3) to obtain the core layer fabric.

[0031] Furthermore, the amount of hydroquinone added is 0.2-0.3% of the mass of 2-morpholinoethyl methacrylate.

[0032] Furthermore, the molar ratio of bromododecane to 2-morpholinoethyl methacrylate is 1:1.

[0033] Furthermore, the amount of potassium persulfate added is 0.3-0.5 wt%.

[0034] Furthermore, the amount of N,N'-methylenebisacrylamide added is 0.06-0.08 wt%.

[0035] Furthermore, the amount of cellulase added is 2-3% of the mass of bamboo fiber, and the amount of xylanase added is 1-2% of the mass of bamboo fiber.

[0036] Compared with the prior art, the present invention has at least the following beneficial effects:

[0037] 1. In this invention, the surface oil and oligomers of polypropylene fiber fabric are first removed by alkaline hydrolysis, while slight etching increases the specific surface area. Then, plasma treatment is used to generate active groups on its surface. Subsequently, 2-morpholinoethyl methacrylate and bromododecane are mixed to carry out a nucleophilic substitution reaction to generate an antibacterial modifier. After dissolving the antibacterial modifier in an ethanol solution, the plasma-activated polypropylene fiber fabric is soaked. Potassium persulfate is used to initiate a free radical polymerization reaction between the antibacterial modifier and the polypropylene fiber fabric, thereby attaching the antibacterial modifier to the surface of the polypropylene fiber fabric. At the same time, a three-dimensional network is formed by cross-linking with the cross-linking agent N,N'-methylenebisacrylamide, giving the polypropylene fiber a long-lasting antibacterial effect. This helps the composite fabric inhibit the growth of bacteria in sweat and reduce odor.

[0038] 2. In this invention, tetramethylammonium chloride is mixed with citric acid. Tetramethylammonium chloride acts as a hydrogen bond acceptor, binding with the carboxyl groups of citric acid through hydrogen bonds to form a stable solvent system. The pretreated polyester fibers are then soaked in the solvent system, allowing the carboxylic acid groups in the solvent system to be adsorbed onto the surface of the polyester fibers through hydrogen bonds and van der Waals forces, forming a hydrophilic layer. This effectively improves the hydrophilicity of the polyester fibers, which is beneficial for improving the moisture absorption and quick-drying effect of the composite fabric. Then, the fabric is immersed in a polyacrylic acid solution, allowing the polyacrylic acid to bind with the polyester fibers through hydrogen bonds, forming a cross-linked network, which helps to improve the wash resistance of the composite fabric.

[0039] 3. In this invention, by blending pretreated bamboo fiber with polypropylene fiber to form a core layer fabric, and then bonding it with the outer and inner layers, the core layer fabric, whose hydrophilicity is between that of the inner and outer layers, first adsorbs moisture through hydrogen bonding and then transfers it to the outer layer through the pores between the fibers. The highly hydrophilic porous structure of the outer layer fabric quickly absorbs and spreads the moisture, accelerates evaporation, and prevents moisture from seeping back in, thereby further improving the moisture absorption and quick-drying performance of the composite fabric and keeping the inner layer relatively dry. Attached Figure Description

[0040] The accompanying drawings, which are incorporated herein and form part of the specification, illustrate embodiments of the present disclosure and, together with the specification, further serve to explain the principles of the present disclosure and enable those skilled in the art to implement and use the present disclosure.

[0041] Figure 1 This is a flowchart illustrating the preparation process of the bamboo fiber-containing moisture-wicking, quick-drying, and antibacterial composite fabric used in this embodiment of the invention. Detailed Implementation

[0042] The following describes in detail, with reference to the accompanying drawings and specific embodiments, a moisture-wicking, quick-drying, and antibacterial composite fabric containing bamboo fiber provided by the present invention and its preparation process.

[0043] Example 1

[0044] A preparation process for a moisture-wicking, quick-drying, and antibacterial composite fabric containing bamboo fiber, such as... Figure 1 As shown, it includes the following steps:

[0045] S1: Preparing the inner layer fabric

[0046] S1.1: The polypropylene fiber fabric is placed in a 5% sodium hydroxide solution, soaked at 50°C for 20 minutes, washed with deionized water until neutral and dried, and then treated with a plasma treatment instrument for 2 minutes to activate the surface and obtain the pretreated polypropylene fiber fabric.

[0047] S1.2: Add 2-morpholinoethyl methacrylate to anhydrous ethanol at a mass ratio of 1:4, stir thoroughly, then add hydroquinone and heat at 50°C for 10 min, then add bromododecane dropwise, heat and stir at 80°C for 6 h, remove unreacted material by rotary evaporation and acetone precipitation, filter and vacuum dry to obtain the antibacterial modifier. The amount of hydroquinone added is 0.2% of the mass of 2-morpholinoethyl methacrylate, and the molar ratio of bromododecane to 2-morpholinoethyl methacrylate is 1:1.

[0048] S1.3: The above antibacterial modifier was added to a 25% ethanol solution at a solid-liquid ratio of 1g:20mL, stirred thoroughly to dissolve, and then the pretreated polypropylene fiber fabric was added at a bath ratio of 1:20. After fully immersing the fabric, potassium persulfate and N,N'-methylenebisacrylamide were added, and the mixture was heated and stirred at 60°C for 2 hours under nitrogen protection. The mixture was then removed, excess liquid was rolled off, and vacuum dried to obtain the inner layer fabric. The amount of potassium persulfate added was 0.3wt%, and the amount of N,N'-methylenebisacrylamide added was 0.06wt%.

[0049] S2: Reinforced hydrophilic modified polyester fiber

[0050] S2.1: Immerse polyester fibers in an aqueous solution containing 1% sodium hydroxide and 0.5% sodium dodecyl sulfate, treat at 70°C for 20 minutes, then wash with deionized water until neutral and dry to obtain pretreated polyester fibers.

[0051] S2.2: Tetramethylammonium chloride and citric acid were mixed in a molar ratio of 1:1 and stirred at 70°C for 40 min to obtain a transparent homogeneous liquid;

[0052] S2.3: Immerse the pretreated polyester fiber in the transparent homogeneous liquid at a bath ratio of 1:20, stir at a constant temperature of 70°C for 90 minutes, remove it, soak it in ice ethanol at -10°C for 3 minutes, and then ultrasonically clean it with ethanol and deionized water for 10 minutes in sequence to obtain hydrophilic modified polyester fiber.

[0053] S2.4: Immerse the above-mentioned hydrophilic modified polyester fiber in a 0.5% polyacrylic acid solution, heat it at 40°C for 30 minutes, remove it, and then heat-cur it at 110°C for 10 minutes to obtain reinforced hydrophilic modified polyester fiber.

[0054] S3: Prepare the outer layer fabric and the core layer fabric.

[0055] S3.1: Bamboo fibers were soaked in an aqueous solution containing cellulase and xylanase at a bath ratio of 1:20 and treated at 40°C for 2 hours. After removal, the fibers were soaked in a 5% glycerol solution at 50°C for 20 minutes to obtain pretreated bamboo fibers. The amount of cellulase added was 2% of the mass of bamboo fibers, and the amount of xylanase added was 1% of the mass of bamboo fibers.

[0056] S3.2: The pretreated bamboo fiber and the reinforced hydrophilic modified polyester fiber obtained in step S2.4 are blended at a mass ratio of 1:2 to obtain the outer fabric.

[0057] S3.3: The pretreated bamboo fiber and polypropylene fiber are blended at a mass ratio of 1:2 to obtain the core layer fabric.

[0058] S4: Adhesion

[0059] The inner layer fabric, core layer fabric and outer layer fabric are bonded together to obtain a moisture-wicking, quick-drying and antibacterial composite fabric.

[0060] Example 2

[0061] A preparation process for a moisture-wicking, quick-drying, and antibacterial composite fabric containing bamboo fiber, such as... Figure 1 As shown, it includes the following steps:

[0062] S1: Preparing the inner layer fabric

[0063] S1.1: The polypropylene fiber fabric is placed in a 5% sodium hydroxide solution, soaked at 55°C for 25 minutes, washed with deionized water until neutral and dried, and then treated with a plasma treatment instrument for 2.5 minutes to activate the surface and obtain the pretreated polypropylene fiber fabric.

[0064] S1.2: Add 2-morpholinoethyl methacrylate to anhydrous ethanol at a mass ratio of 1:5, stir thoroughly, then add hydroquinone and heat at 55°C for 15 min, then add bromododecane dropwise, heat and stir at 85°C for 7 h, remove unreacted material by rotary evaporation and acetone precipitation, filter and vacuum dry to obtain the antibacterial modifier. The amount of hydroquinone added is 0.25% of the mass of 2-morpholinoethyl methacrylate, and the molar ratio of bromododecane to 2-morpholinoethyl methacrylate is 1:1.

[0065] S1.3: The above antibacterial modifier was added to a 25% ethanol solution at a solid-liquid ratio of 1g:25mL, stirred thoroughly to dissolve, and then the pretreated polypropylene fiber fabric was added at a bath ratio of 1:22. After fully immersing the fabric, potassium persulfate and N,N'-methylenebisacrylamide were added, and the mixture was heated and stirred at 70°C for 3 hours under nitrogen protection. The mixture was then removed, excess liquid was rolled off, and vacuum dried to obtain the inner layer fabric. The amount of potassium persulfate added was 0.4wt%, and the amount of N,N'-methylenebisacrylamide added was 0.07wt%.

[0066] S2: Reinforced hydrophilic modified polyester fiber

[0067] S2.1: Immerse polyester fibers in an aqueous solution containing 1% sodium hydroxide and 0.5% sodium dodecyl sulfate, treat at 75°C for 25 min, then wash with deionized water until neutral and dry to obtain pretreated polyester fibers.

[0068] S2.2: Tetramethylammonium chloride and citric acid were mixed at a molar ratio of 1:1.5 and stirred at 75°C for 45 min to obtain a transparent homogeneous liquid;

[0069] S2.3: Immerse the pretreated polyester fiber in the transparent homogeneous liquid at a bath ratio of 1:25, stir at a constant temperature of 75°C for 105 min, remove it, soak it in ice ethanol at -10°C for 4 min, and then ultrasonically clean it with ethanol and deionized water for 15 min in sequence to obtain hydrophilic modified polyester fiber.

[0070] S2.4: Immerse the above-mentioned hydrophilic modified polyester fiber in a 0.5% polyacrylic acid solution, heat it at 45°C for 35 minutes, remove it, and then heat-cure it at 115°C for 15 minutes to obtain reinforced hydrophilic modified polyester fiber.

[0071] S3: Prepare the outer layer fabric and the core layer fabric.

[0072] S3.1: Bamboo fibers were soaked in an aqueous solution containing cellulase and xylanase at a bath ratio of 1:25 and treated at 45°C for 2.5 hours. After removal, they were then soaked in a 5% glycerol solution at 55°C for 25 minutes to obtain pretreated bamboo fibers. The amount of cellulase added was 2.5% of the mass of bamboo fibers, and the amount of xylanase added was 1.5% of the mass of bamboo fibers.

[0073] S3.2: The pretreated bamboo fiber and the reinforced hydrophilic modified polyester fiber obtained in step S2.4 are blended at a mass ratio of 1:2.5 to obtain the outer fabric.

[0074] S3.3: The pretreated bamboo fiber and polypropylene fiber are blended at a mass ratio of 1:2.5 to obtain the core layer fabric.

[0075] S4: Adhesion

[0076] The inner layer fabric, core layer fabric and outer layer fabric are bonded together to obtain a moisture-wicking, quick-drying and antibacterial composite fabric.

[0077] Example 3

[0078] A preparation process for a moisture-wicking, quick-drying, and antibacterial composite fabric containing bamboo fiber, such as... Figure 1 As shown, it includes the following steps:

[0079] S1: Preparing the inner layer fabric

[0080] S1.1: The polypropylene fiber fabric is placed in a 5% sodium hydroxide solution, soaked at 60°C for 30 minutes, washed with deionized water until neutral and dried, and then treated with a plasma treatment instrument for 3 minutes to activate the surface and obtain the pretreated polypropylene fiber fabric.

[0081] S1.2: Add 2-morpholinoethyl methacrylate to anhydrous ethanol at a mass ratio of 1:6, stir thoroughly, then add hydroquinone and heat at 60°C for 20 min, then add bromododecane dropwise, heat and stir at 90°C for 8 h, remove unreacted material by rotary evaporation and acetone precipitation, filter and vacuum dry to obtain the antibacterial modifier. The amount of hydroquinone added is 0.3% of the mass of 2-morpholinoethyl methacrylate, and the molar ratio of bromododecane to 2-morpholinoethyl methacrylate is 1:1.

[0082] S1.3: The above antibacterial modifier was added to a 25% ethanol solution at a solid-liquid ratio of 1g:30mL, stirred thoroughly to dissolve, and then the pretreated polypropylene fiber fabric was added at a bath ratio of 1:25. After fully immersing the fabric, potassium persulfate and N,N'-methylenebisacrylamide were added, and the mixture was heated and stirred at 80°C for 4 hours under nitrogen protection. The mixture was then removed, excess liquid was rolled off, and vacuum dried to obtain the inner layer fabric. The amount of potassium persulfate added was 0.5wt%, and the amount of N,N'-methylenebisacrylamide added was 0.08wt%.

[0083] S2: Reinforced hydrophilic modified polyester fiber

[0084] S2.1: Immerse polyester fibers in an aqueous solution containing 1% sodium hydroxide and 0.5% sodium dodecyl sulfate, treat at 80°C for 30 minutes, then wash with deionized water until neutral and dry to obtain pretreated polyester fibers.

[0085] S2.2: Tetramethylammonium chloride and citric acid were mixed in a molar ratio of 1:2 and stirred at 80°C for 50 min to obtain a transparent homogeneous liquid;

[0086] S2.3: Immerse the pretreated polyester fiber in the transparent homogeneous liquid at a bath ratio of 1:30, stir at 80°C for 120 min, remove and soak in -10°C ice ethanol for 5 min, then ultrasonically clean with ethanol and deionized water for 20 min in sequence to obtain hydrophilic modified polyester fiber.

[0087] S2.4: Immerse the above-mentioned hydrophilic modified polyester fiber in a 0.5% polyacrylic acid solution, heat it at 50°C for 40 minutes, remove it, and then heat-cur it at 120°C for 20 minutes to obtain reinforced hydrophilic modified polyester fiber.

[0088] S3: Prepare the outer layer fabric and the core layer fabric.

[0089] S3.1: Bamboo fibers were soaked in an aqueous solution containing cellulase and xylanase at a bath ratio of 1:30 and treated at 50°C for 3 hours. After removal, the fibers were soaked in a 5% glycerol solution at 60°C for 30 minutes to obtain pretreated bamboo fibers. The amount of cellulase added was 3% of the mass of bamboo fibers, and the amount of xylanase added was 2% of the mass of bamboo fibers.

[0090] S3.2: The pretreated bamboo fiber and the reinforced hydrophilic modified polyester fiber obtained in step S2.4 are blended at a mass ratio of 1:3 to obtain the outer fabric.

[0091] S3.3: The pretreated bamboo fiber and polypropylene fiber are blended at a mass ratio of 1:3 to obtain the core layer fabric.

[0092] S4: Adhesion

[0093] The inner layer fabric, core layer fabric and outer layer fabric are bonded together to obtain a moisture-wicking, quick-drying and antibacterial composite fabric.

[0094] Comparative Example 1

[0095] The difference between Comparative Example 1 and Example 1 is that step S1 is removed and the inner fabric in step S4 is replaced with polypropylene fiber fabric.

[0096] Comparative Example 2

[0097] The difference between Comparative Example 2 and Example 1 is that steps S2.2-2.3 are removed, and the hydrophilic modified polyester fiber in step S2.4 is replaced with an equal amount of pretreated polyester fiber.

[0098] Comparative Example 3

[0099] The difference between Comparative Example 3 and Example 1 is that step S3.3 is removed, and the core fabric in step S4 is removed.

[0100] Comparative Example 4

[0101] The difference between Comparative Example 4 and Example 1 is that step S2.4 is removed, and the reinforced hydrophilic modified polyester fiber in step S3.2 is replaced with an equal amount of hydrophilic modified polyester fiber.

[0102] Test case

[0103] Test 1: The initial antibacterial rate and the antibacterial rate after 50 washes of the inner layer fabrics prepared in Examples 1-3 and the polypropylene fiber fabric used in Comparative Example 1 were tested according to GB / T20944.3—2008. The test strain was Staphylococcus aureus. The test was repeated three times and the average value was taken. The results are shown in Table 1.

[0104] Table 1: Initial antibacterial rate and antibacterial rate after 50 washes of the inner layer fabric

[0105]

[0106] As shown in Table 1 above, the initial antibacterial rate of the inner layer fabrics prepared in Examples 1-3 was 99.99%, and after 50 washes, the antibacterial rate was also above 98.5%. In contrast, the unmodified polypropylene fiber fabric used in Comparative Example 1 had no antibacterial effect. This shows that the process of first removing the surface oil and oligomers of the polypropylene fiber fabric by alkaline hydrolysis, while slightly etching to increase the specific surface area, and then using plasma treatment to generate active groups on its surface, followed by mixing 2-morpholinoethyl methacrylate with dodecane bromo, is highly effective. A nucleophilic substitution reaction is carried out to generate an antibacterial modifier. The antibacterial modifier is dissolved in an ethanol solution and then soaked in plasma-activated polypropylene fiber fabric. Potassium persulfate is used to initiate a free radical polymerization reaction between the antibacterial modifier and the polypropylene fiber fabric, attaching the antibacterial modifier to the surface of the polypropylene fiber fabric. At the same time, a three-dimensional network is formed by cross-linking with the cross-linking agent N,N'-methylenebisacrylamide, giving the polypropylene fiber fabric a long-lasting antibacterial effect. This helps the inner layer fabric to inhibit the growth of bacteria in sweat and reduce odor.

[0107] Test 2: The water droplet diffusion time, water absorption rate, moisture evaporation rate and moisture permeability of the composite fabrics prepared by Examples 1-3 and Comparative Examples 2-3 were tested according to GB / T21655.1-2008. The results are shown in Table 2.

[0108] Table 2: Test Results of Moisture Absorption and Quick-Drying Properties of Composite Fabrics

[0109]

[0110] As shown in Table 2 above, in Comparative Example 2, without hydrophilic modification of the polyester fibers, the composite fabric obtained had a longer water-diffusion time than in Example 1, while the water absorption rate, water evaporation rate, and moisture permeability were all lower than in Example 1. Since the water-diffusion time index mainly assesses the fabric's absorption rate of liquid water, and the water absorption rate index mainly assesses the fabric's saturation absorption degree of liquid water, both reflect the fabric's ability to absorb sweat when the human body is sweating. Therefore, the composite fabric obtained in Example 1 has a significantly higher sweat absorption capacity than that in Comparative Example 2. It can be seen that mixing tetramethylammonium chloride with citric acid allows tetramethylammonium chloride to act as a hydrogen bond acceptor, binding with the carboxyl groups of citric acid through hydrogen bonds to form a stable solvent system. Then, soaking the pretreated polyester fibers allows the carboxylic acid groups in the solvent system to be adsorbed onto the surface of the polyester fibers through hydrogen bonds and van der Waals forces, forming a hydrophilic layer. This effectively improves the hydrophilicity of the polyester fibers and is beneficial to improving the moisture absorption and quick-drying effect of the composite fabric.

[0111] In Comparative Example 3, after removing the core fabric, the composite fabric composed only of the inner and outer fabrics had a longer water diffusion time than in Example 1. Its water absorption rate, water evaporation rate, and moisture permeability were also lower than in Example 1. This means that the composite fabric prepared in Example 1 had better moisture absorption and quick-drying properties than that in Comparative Example 3. It is evident that by blending pretreated bamboo fiber with polypropylene fiber to form the core fabric, and then bonding it with the outer and inner fabrics, the core fabric, with its hydrophilicity between that of the inner and outer fabrics, first absorbs moisture through hydrogen bonding and then transfers it to the outer layer via inter-fiber pores. The highly hydrophilic porous structure of the outer fabric quickly absorbs and spreads the moisture, accelerating evaporation, thereby further improving the moisture absorption and quick-drying properties of the composite fabric.

[0112] In addition, the moisture permeability simulates the ability of moisture emitted by the skin to be conducted outward through the fabric. The higher the moisture permeability, the better the wearing comfort of the fabric, indicating that the composite fabrics prepared in Examples 1-3 are more comfortable than those in Comparative Examples 2-3.

[0113] Test 3: Referring to the test method of Test 2, the water droplet diffusion time, water absorption rate, water evaporation rate and moisture permeability of the composite fabrics prepared in Examples 1-3 and Comparative Example 4 after 50 washes were tested. The results are shown in Table 3.

[0114] Table 3: Test results of moisture absorption and quick-drying properties of composite fabrics after 50 washes

[0115]

[0116] As shown in Table 3, in Comparative Example 4, without strengthening the hydrophilic modified polyester fiber, the composite fabric obtained after 50 washes showed a significant increase in water droplet diffusion time, while the water absorption rate, water evaporation rate, and moisture permeability decreased significantly. This indicates that immersing the hydrophilic modified polyester fiber in a polyacrylic acid solution allows the polyacrylic acid to bond with the polyester fiber through hydrogen bonds, forming a cross-linked network, which helps improve the wash resistance of the composite fabric.

[0117] The above embodiments are merely illustrative of the principles and effects of the present invention and are not intended to limit the invention. Any person skilled in the art can modify or alter the above embodiments without departing from the spirit and scope of the present invention. Therefore, all equivalent modifications or alterations made by those skilled in the art without departing from the spirit and technical concept disclosed in the present invention should still be covered by the claims of the present invention.

Claims

1. A bamboo fiber-containing moisture absorption and quick-drying antibacterial composite fabric, characterized in that, The inner layer fabric, the core layer fabric and the outer layer fabric; The preparation process of the bamboo fiber-containing moisture absorption and quick-drying antibacterial composite fabric comprises the following steps: S1: preparing the inner layer fabric S1.1: the polypropylene fiber fabric is placed in a 5% sodium hydroxide solution, soaked at 50-60°C for 20-30 min, then washed with deionized water until neutral and dried, and then treated with a plasma treatment instrument for 2-3 min for surface activation to obtain pretreated polypropylene fiber fabric; S1.2: 2-morpholinoethyl methacrylate is added to anhydrous ethanol according to a mass ratio of 1: (4-6), fully stirred and mixed, then hydroquinone is added and heated at 50-60°C for 10-20 min, then bromododecane is added dropwise, heated and stirred at 80-90°C for 6-8 h, then the unreacted substances are precipitated by acetone, filtered and vacuum dried to obtain an antibacterial modifier; S1.3: the above-mentioned antibacterial modifier is added to a 25% ethanol solution according to a solid-liquid ratio of 1g: (20-30) mL, fully stirred and dissolved, then the above-mentioned pretreated polypropylene fiber fabric is added according to a bath ratio of 1: (20-25), fully immersed, then potassium persulfate and N, N'-methylene bisacrylamide are added, heated and stirred at 60-80°C for 2-4 h under the protection of nitrogen, taken out, rolled off the excess liquid and vacuum dried to obtain the inner layer fabric; S2: strengthening the hydrophilic modified polyester fiber S2.1: the polyester fiber is immersed in an aqueous solution containing 1% sodium hydroxide and 0.5% sodium dodecyl sulfate, treated at 70-80°C for 20-30 min, then washed with deionized water until neutral and dried to obtain pretreated polyester fiber; S2.2: tetramethylammonium chloride and citric acid are mixed according to a molar ratio of 1: (1-2), stirred at 70-80°C for 40-50 min to obtain a transparent homogeneous liquid; S2.3: the above-mentioned pretreated polyester fiber is immersed in the above-mentioned transparent homogeneous liquid according to a bath ratio of 1: (20-30), treated by constant temperature stirring at 70-80°C for 90-120 min, then placed in-10°C ice ethanol for 3-5 min, and then sequentially ultrasonically cleaned with ethanol and deionized water for 10-20 min to obtain a hydrophilic modified polyester fiber; S2.4: the above-mentioned hydrophilic modified polyester fiber is immersed in a 0.5% polyacrylic acid solution, heated and treated at 40-50°C for 30-40 min, then taken out and heat cured at 110-120°C for 10-20 min to obtain a strengthened hydrophilic modified polyester fiber; S3: preparing the outer layer fabric and the core layer fabric S3.1: the bamboo fiber is immersed in an aqueous solution containing cellulase and xylanase according to a bath ratio of 1: (20-30), treated at 40-50°C for 2-3 h, then taken out and immersed in a 5% glycerol solution at 50-60°C for 20-30 min to obtain pretreated bamboo fiber; S3.2: the above-mentioned pretreated bamboo fiber and the strengthened hydrophilic modified polyester fiber prepared in step S2.4 are blended according to a mass ratio of 1: (2-3) to obtain the outer layer fabric; S3.3: the above-mentioned pretreated bamboo fiber and polypropylene fiber are blended according to a mass ratio of 1: (2-3) to obtain the core layer fabric; S4: bonding The inner layer fabric, the core layer fabric and the outer layer fabric are bonded to obtain the moisture absorption and quick-drying antibacterial composite fabric.

2. The bamboo fiber-containing moisture absorption and quick-drying antibacterial composite fabric according to claim 1, characterized in that, The amount of hydroquinone added is 0.2-0.3% of the mass of 2-morpholinoethyl methacrylate. 3.The bamboo fiber-containing moisture absorption and quick-drying antibacterial composite fabric according to claim 1, characterized in that, The molar ratio of bromododecane to 2-morpholinoethyl methacrylate is 1:

1.

4. The bamboo fiber-containing moisture absorption and quick-drying antibacterial composite fabric according to claim 1, characterized in that, The amount of potassium persulfate added is 0.3-0.5wt%.

5. The bamboo fiber-containing moisture absorption and quick-drying antibacterial composite fabric according to claim 1, characterized in that, The amount of N,N'-methylenebisacrylamide added is 0.06-0.08wt%. 6.The bamboo fiber-containing moisture absorption and quick-drying antibacterial composite fabric according to claim 1, characterized in that, The amount of cellulase added is 2-3% of the mass of bamboo fiber, and the amount of xylanase added is 1-2% of the mass of bamboo fiber.

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