Rapid perspiration sports blend fiber

Abstract

The invention discloses a sports blend fiber capable of rapidly discharging sweat, and belongs to the technical field of textile fabrics. The preparation method comprises the steps of chitosan derivative preparation, wool grafting, polyester surface treatment, yarn blending and post-treatment. According to the invention, through a multi-dimensional modification synergistic effect, the strategy of'division and treatment 'is adopted: firstly, wool is endowed with extremely strong hydrophilicity through chemical grafting, so that the wool becomes a moisture channel; then, the polyester fiber is endowed with lasting antibacterial property and capillary moisture conduction capability brought by a special-shaped structure through plasma treatment and nano-silver finishing; finally, performance balance and enhancement are achieved through blending and hydrophilic after-treatment.

Description

Technical Field

[0001] This invention relates to the field of textile fabric technology, specifically to a fast-wicking sports blended fiber. Background Technology

[0002] The research and development of sportswear fabrics has always revolved around the physiological needs of human movement, with sweat-wicking function being a core indicator that directly affects athletic performance and wearing experience. Modern sportswear fabric technology achieves a precise match with the physiological needs of human movement through material innovation and structural design, with sweat-wicking function being the core requirement, while also taking into account multiple characteristics such as breathability, elasticity, and durability.

[0003] During exercise, the human body generates a significant amount of heat and sweat; adults can sweat 1-2 liters per hour during vigorous exercise. If sweat cannot be wicked away promptly, it creates a hot and humid environment on the skin's surface, leading to a sticky feeling, temperature imbalance, and even decreased athletic performance. Therefore, sweat-wicking function is a core indicator of sports fabrics, achieved through a complete "moisture absorption-moisture wicking-quick drying" chain. Moisture absorption refers to the fabric's rapid absorption of sweat from the skin's surface through hydrophilic groups or microporous structures on the fiber surface; moisture wicking utilizes the capillary effect between fibers or irregular cross-sectional design to transfer moisture from the inner layer of the fabric to the outer layer, preventing sweat buildup; quick drying accelerates moisture evaporation and keeps the fabric dry by increasing the fabric's surface area and using hydrophobic fibers.

[0004] Beyond its core sweat-wicking function, sports fabrics must also meet multiple functional requirements. Breathability is a key auxiliary characteristic, facilitating air circulation and heat exchange through the fabric's porous structure or weaving process, working in conjunction with sweat wicking to maintain the body's thermal balance. Elasticity is essential due to the large range of motion during exercise; fabrics need to provide sufficient stretch and recovery by incorporating elastic fibers such as spandex or using knitted structures to ensure freedom of movement without restriction. Durability is equally important. Friction, stretching, and repeated washing in sports require fabrics to be anti-pilling, abrasion-resistant, and washable, typically achieved through optimized fiber strength or finishing processes. Furthermore, specific sports scenarios require targeted functions; for example, outdoor sports require sun protection (UPF value) and windproof properties; high-intensity sports require antibacterial and odor-resistant functions, achieved by adding antibacterial agents or using antibacterial fibers to inhibit bacterial growth; and close-fitting sportswear must also be skin-friendly to reduce skin irritation.

[0005] From a material perspective, the development of sports fabrics has evolved from natural fibers to synthetic fibers, and then to functional composite fibers. Early natural fibers like cotton, while skin-friendly, tended to stiffen and dry slowly after absorbing moisture, making them unsuitable for athletic activities. Synthetic fibers, with their superior physical properties, became mainstream. Polyester (polyester fiber) is characterized by high strength and easy drying; its moisture-wicking properties can be enhanced through irregular cross-section designs (such as trefoil and cross-shaped designs). Nylon (polyamide fiber) is elastic and abrasion-resistant, often used in sports fabrics requiring frequent stretching. Spandex (polyurethane elastic fiber) is known for its high elasticity and is usually blended with other fibers to provide tensile strength. Regenerated cellulose fibers such as Modal and Tencel combine the skin-friendliness of natural fibers with the moisture absorption and wicking properties of synthetic fibers; through process improvements, drying speed can be increased, making them suitable for low- to medium-intensity sports. In recent years, composite fabric technology has developed rapidly, further optimizing overall performance such as sweat wicking through multi-layer structural designs (such as an inner moisture-absorbing layer, a middle moisture-wicking layer, and an outer quick-drying layer) or gradient arrangements of different fibers.

[0006] Technological innovation drives continuous upgrades in the performance of sports fabrics. In fiber modification, hydrophilic modification technology introduces hydrophilic groups onto the surface of hydrophobic synthetic fibers through chemical treatment, enhancing moisture absorption. Microencapsulation technology encapsulates functional substances (such as antibacterial agents and cooling agents) within the fiber, achieving long-lasting functional release. In structural design, knitting processes regulate breathability and elasticity by varying loop density and weave structure. Warp-knitted fabrics offer stable structures suitable for high-intensity sports, while weft-knitted fabrics offer better elasticity for flexible movements. Woven fabrics optimize breathability and durability by adjusting yarn density and weave texture. Finishing technologies such as water-repellent treatment enhance fabric hydrophobicity and accelerate moisture evaporation; antistatic finishing reduces static electricity during exercise, improving wearing comfort.

[0007] The technological development of sports fabrics has always been centered on the physiological needs of human movement, evolving from single-function to multi-functional integration. As a core requirement, sweat-wicking functionality has seen technological innovation drive the leap from passive moisture absorption to active moisture-wicking and quick-drying fabrics. Furthermore, the synergistic optimization of breathability, elasticity, and durability further enhances the athletic experience. With advancements in materials science and textile technology, environmental friendliness, intelligence, and integration will become important development directions for sports fabrics, providing more precise and comfortable solutions for different sports scenarios, contributing to improved athletic performance and the popularization of healthy lifestyles. Summary of the Invention

[0008] The purpose of this invention is to provide a fast-wicking sports blended fiber to solve the problem that current sports fabrics cannot meet the sweat-wicking requirements while also meeting other requirements.

[0009] A method for preparing a sweat-wicking fiber includes the following steps: Preparation of S1 chitosan derivatives: Chitosan undergoes a nucleophilic acylation reaction with succinic anhydride to generate N-succinylated chitosan; S2 Wool Grafting: The wool is degreased and activated; then the wool is immersed in an N-succinylated chitosan solution for grafting; after grafting, it is washed and dried to obtain grafted wool; S3 Polyester Surface Treatment: Polyester chips are melt-spun into polyester fibers, and the polyester fibers are surface-treated with plasma; then the polyester fibers are treated with nano silver solution to obtain surface-treated polyester fibers; S4 blended yarn: Grafted wool and surface-treated polyester fibers are mixed evenly, opened and combed to obtain a blended fiber sliver; then it is spun, spun and wound to obtain the blended yarn. In grafted wool and surface-treated polyester fibers, the mass ratio of grafted wool is ≤30%; S5 post-treatment: After the blended yarn is woven into fabric, it is post-treated by padding to obtain moisture-wicking fibers; The post-treatment solution contains hydrophilic polyesters.

[0010] Preferably, the degree of deacetylation of the chitosan is ≥85%, the molecular weight is ≤200kDa, and the degree of substitution of the N-succinylated chitosan is ≥0.5.

[0011] Preferably, the preparation of the S1 chitosan derivative is as follows: chitosan is dissolved in an acidic solution with a pH of 5-6 and stirred until completely dissolved to obtain a transparent acidic chitosan solution; Add succinic anhydride to the acidic chitosan solution and stir until completely dissolved; add alkaline solution dropwise to adjust the pH of the system to 7-8, and stir the reaction in a water bath at 45-50℃ for at least 6 hours; add at least 0.32g of succinic anhydride for every 1g of chitosan contained in the solution. After the reaction was complete, the precipitate was collected, filtered, and dried to obtain N-succinylated chitosan.

[0012] Preferably, the S2 wool grafting involves degreasing and activating the wool. The wool is then immersed in the grafting solution for grafting, and the reaction is carried out in a water bath at ≥60℃ for at least 2 hours. After the reaction is completed, the wool fibers are removed, washed, and dried to obtain grafted wool.

[0013] The grafting solution contains at least the following components and is adjusted to a pH of 5.5 ± 0.1: N-succinylated chitosan ≥3g / L Carboxyl activator EDC·HCl ≥2.5g / L Carboxyl activator / enhancer ≥ 0.5 g / L.

[0014] Preferably, in the S3 polyester surface treatment, the polyester fibers are treated with a nano-silver solution as follows: Polyester fibers were immersed in a nano-silver finishing solution and reacted in a water bath at ≥60°C for at least 30 min; then baked at ≥150°C for at least 30 s, and then kept at ≥80°C for at least 30 min. The nano-silver finishing solution contains at least 0.07 g / L of silver.

[0015] Preferably, in step S3, the polyester surface treatment, the spinneret of the melt spinning is cross-shaped or H-shaped.

[0016] Preferably, the post-treatment solution in the S5 post-treatment contains at least the following components and has a pH of 5-6.

[0017] Hydrophilic polyester ≥30g / L Antibacterial finishing agent ≥20g / L Non-ionic penetrant ≥1g / L Hydrophilic amino silicone oil ≥10g / L.

[0018] Natural wool has good moisture absorption but slow moisture release. This invention greatly enhances its moisture absorption and wicking capacity by grafting hydrophilic N-succinylated chitosan, making it a channel for moisture absorption and transport in blended yarns.

[0019] Polyester fibers made from cross-shaped or H-shaped spinnerets have a larger specific surface area and capillary effect, becoming channels for rapid diffusion and evaporation of moisture in blended yarns.

[0020] Post-treatment hydrophilic polyester forms a hydrophilic film on the yarn surface, further reducing the surface tension of water and promoting the spread and evaporation of moisture inside and outside the yarn, thus achieving quick drying.

[0021] This invention combines these three elements to achieve a complete and efficient perspiration-wicking chain: moisture is absorbed from the skin, rapidly guided to the fabric surface within and between fibers, and then quickly evaporates on the fabric surface.

[0022] Regarding antibacterial properties, the chitosan derivative grafted onto wool in this invention possesses natural antibacterial properties. Nano-silver polyester provides broad-spectrum, powerful, and wash-resistant long-lasting antibacterial capabilities, offering high targeting and efficiency. Post-treatment antibacterial agents add another layer of antibacterial barrier to the entire fabric. This multi-layered antibacterial mechanism provides a more reliable and longer-lasting antibacterial and odor-controlling effect, meeting the hygiene needs of heavy sweating during exercise.

[0023] This invention limits the proportion of wool: too high a wool proportion will affect the strength and abrasion resistance of the fabric (wool is relatively weak), and may also increase itching and shrinkage risk. Using polyester as the main component ensures that the fabric has the necessary physical properties for sports fabrics, such as high strength, high elasticity, good shape retention, and abrasion resistance.

[0024] This invention ensures the effectiveness and consistency of subsequent grafting reactions by limiting the quality of chitosan raw materials required for the preparation of N-succinylated chitosan and the key indicators of the reaction products. A higher degree of deacetylation in chitosan results in more free amino groups on the molecular chain. These amino groups are key sites for reaction with succinic anhydride, ensuring high reactivity and grafting potential. Smaller molecular weight leads to better solubility and lower viscosity of chitosan in solution, making it easier to prepare uniform and well-permeable grafting solutions, thus more effectively treating wool fibers. The degree of substitution directly reflects the number of succinyl groups attached to the chitosan molecule. A higher degree of substitution results in stronger hydrophilicity of the product, leading to more hydrophilic groups grafted onto the wool, thus ensuring better perspiration wicking.

[0025] This invention optimizes and protects the specific process conditions and parameters of the N-succinylation reaction, ensuring that the reaction is efficient, complete, and controllable.

[0026] Chitosan is first dissolved at an acidic pH, followed by a reaction under alkaline conditions. This is the standard procedure for this type of reaction, maximizing acylation at the amino groups rather than the hydroxyl groups to generate the target product, N-succinylated chitosan, which has better hydrophilicity than the O-substituted product. A mild reaction temperature and sufficient time ensure the reaction proceeds fully while preventing excessive degradation of the chitosan molecular chains under strong acid, strong alkali, and high temperatures. A well-defined feed ratio provides concrete material support for achieving a high degree of substitution, making the process quantifiable and reproducible.

[0027] This invention specifies detailed requirements for wool grafting to ensure efficient and secure attachment of N-succinylated chitosan to the wool. Degreasing and activation remove grease and dirt from the wool surface and open the cuticle layer, greatly improving the accessibility and reactivity of the wool fibers, allowing the grafting solution to fully penetrate. Using a carboxyl activator (EDC·HCl) and a reinforcing agent (such as NHS), the carboxyl groups (-COOH) on N-succinylated chitosan and the amino groups (-NH2) on wool protein molecules do not readily react directly. The EDC / NHS system first activates the carboxyl groups, generating active esters, which then form strong amide bonds with the amino groups of the wool. This covalent bond is very strong, wash-resistant, and ensures the durability of the perspiration-wicking function. A specific pH environment represents the optimal efficiency range for EDC activation of carboxyl groups and subsequent amide bond formation. Concentration and temperature ensure sufficient driving force and speed for the grafting reaction, achieving the ideal grafting rate within a reasonable time.

[0028] These cross-shaped / H-shaped fibers have two major advantages over ordinary round fibers: Increasing the specific surface area accelerates the evaporation of moisture from the fiber surface into the air; forming capillary channels makes it easier for capillaries to form between fibers, and actively and quickly pumping liquid water from the inside of the fabric to the surface of the fabric by utilizing the capillary effect. This is the key physical mechanism for achieving "moisture wicking".

[0029] Combined with chemical hydrophilic modification, it achieves synergy between "physical moisture wicking" and "chemical moisture absorption / transfer", thus doubling the perspiration efficiency.

[0030] The hydrophilic polyester in the post-treatment solution forms a permanent hydrophilic film on the fiber surface, greatly improving the hydrophobicity of polyester itself, compensating for any potential deficiencies, and making the fabric feel hydrophilic overall, with rapid moisture absorption and spreadability. The added antibacterial finishing agent provides the fabric with additional antibacterial protection through different mechanisms, forming multiple lines of defense with nano-silver, enhancing the breadth and durability of the antibacterial spectrum. Non-ionic penetrants ensure that the post-treatment solution can penetrate evenly and fully into the tight yarn structure, resulting in consistent treatment effects throughout. The hydrophilic amino silicone oil imparts a soft, smooth, and luxurious feel to the fabric (enhancing wearing comfort) without sacrificing hydrophilicity (ordinary amino silicone oil is hydrophobic), and may even enhance the hydrophilicity.

[0031] Compared with the prior art, the beneficial effects of the present invention are as follows: The present invention adopts a "divide and conquer" strategy through multi-dimensional modification synergy: First, chemical grafting imparts strong hydrophilicity to wool, making it a moisture channel; then, plasma treatment and nano-silver finishing endow polyester fibers with durable antibacterial properties and capillary moisture-wicking ability brought by the irregular structure; finally, performance balance and enhancement are achieved through blending and hydrophilic finishing. Detailed Implementation

[0032] The technical solutions in the embodiments of the present invention will be clearly and completely described below. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0033] The chitosan used in this invention has a degree of deacetylation ≥85% and a molecular weight ≤200kDa.

[0034] The carboxyl activator EDC·HCl refers to 1-ethyl-(3-dimethylaminopropyl)carbodiimide hydrochloride.

[0035] NHS refers to N-hydroxysuccinimide. Example 1: Preparation of sweat-wicking fibers, including the following steps: Preparation of S1 chitosan derivatives: Add chitosan to deionized water (1g:50mL), adjust the pH to 5 by adding dilute acetic acid dropwise, heat to 60℃ and stir until completely dissolved to form a transparent solution; Add succinic anhydride (0.32g succinic anhydride per 1g chitosan) to the clear solution in three portions, stirring until completely dissolved after each addition. Before the reaction begins, 0.1 mol / L NaOH solution is slowly added dropwise to maintain the pH of the system at 7.0-8.0; the reaction is stirred in a water bath at 45-50℃ for 6 hours. After the reaction is complete, slowly pour 3 times the volume of anhydrous ethanol into the reaction solution, stir until the white flocculent precipitate is completely precipitated, and let stand for 1 hour.

[0036] The precipitate was collected by vacuum filtration, washed three times with deionized water, and then washed once with anhydrous ethanol. The product was dried in a vacuum drying oven at 60°C to constant weight to obtain N-succinylated chitosan.

[0037] S2 Wool Grafting: The wool is cleaned with ethanol to remove grease; then, it is placed in a plasma treatment chamber and sealed. The vacuum pump is started to evacuate the base vacuum to below 10 Pa; oxygen is introduced into the chamber, and the gas flow rate is stabilized at 30 sccm using a flow controller; the chamber pressure is stabilized at the working pressure of 50 Pa. The radio frequency source is started at 100 W for 3 minutes; then, it is removed to complete the activation process. The wool fibers were immersed in the grafting solution for grafting and reacted in a water bath at 60°C for 2 hours. After the reaction was completed, the wool fibers were removed, thoroughly washed with deionized water, and dried to obtain grafted wool.

[0038] The grafting solution contains the following components, and the pH is maintained at 5.5 ± 0.1 using MES buffer during the reaction: N-succinylated chitosan 3g / L Carboxyl activator EDC·HCl 2.5g / L N-hydroxysuccinimide 0.5 g / L.

[0039] S3 polyester surface treatment: polyester chips are melt-spun into polyester fibers, and the spinneret holes of the melt spinning are cross-shaped; the polyester fibers are subjected to plasma surface treatment with the same parameters as S2 wool grafting. Polyester fibers were immersed in a nano-silver finishing solution and incubated in a water bath at 60°C for 30 minutes; then baked at 150°C for 30 seconds, and then kept at 80°C for 30 minutes; the nano-silver finishing solution contained at least 0.07 g / L of silver. Surface-treated polyester fibers; S4 blended yarn: Grafted wool and surface-treated polyester fibers are mixed evenly, opened and combed (combing weight 20g / m, combing speed 150 nips / min) to obtain a blended fiber sliver; then it is spun, spun and wound to obtain the blended yarn. The mass ratio of grafted wool to surface-treated polyester fiber is 3:7; S5 Post-treatment: After weaving the blended yarn into a plain weave fabric (warp density 280 ends / 10cm, weft density 240 ends / 10cm), the fabric is post-treated using a two-dip two-nip process; the nip rate is maintained at 70%; the resulting fabric is moisture-wicking fiber; the nipped fabric is pre-dried at 80°C for 3 minutes and then baked at 160°C for 2 minutes.

[0040] The temperature of the finishing solution was maintained at 45℃, and the pH was kept at 5-6 with acetic acid.

[0041] Water-based polyester resin finishing agent 30g / L Nano silver antibacterial finishing agent 20g / L Alkylphenol polyoxyethylene ether 1g / L Hydrophilic amino silicone oil 10g / L.

[0042] Example 2 Preparation of sweat-wicking fibers The difference from Example 1 is that the mass ratio of grafted wool to surface-treated polyester fiber in the S4 blended yarn is 2:8.

[0043] Example 3 Preparation of sweat-wicking fibers The difference from Example 1 is that the mass ratio of grafted wool to surface-treated polyester fiber in the S4 blended yarn is 4:6.

[0044] Example 4: Preparation of sweat-wicking fibers The difference from Example 1 is that the spinneret orifice of melt spinning in the S3 polyester surface treatment is H-shaped.

[0045] Example 5: Preparation of sweat-wicking fibers, including the following steps: S1 Preparation of chitosan solution: Add chitosan to deionized water to prepare a 3g / L solution, and add dilute acetic acid to adjust the pH to 5.0. Heat to 60℃ and stir until completely dissolved to form a transparent solution.

[0046] S2 wool grafting: Clean the wool with ethanol to remove grease; then place the wool into a plasma treatment chamber and seal it. Start the vacuum pump to evacuate the background vacuum to below 10 Pa; introduce oxygen into the chamber and stabilize the gas flow rate at 30 sccm using a flow controller; stabilize the chamber pressure at the working pressure of 50 Pa, start the radio frequency source, and operate at 100 W for 3 minutes; then remove the wool to complete the plasma activation. Plasma-activated wool was immersed in the activation solution and reacted in a water bath at 60°C for 30 minutes; after the reaction was complete, the wool fibers were removed. The activation solution contains the following components and is maintained at pH 5.5 ± 0.1 using MES buffer: Carboxyl activator EDC·HCl 2.5g / L N-hydroxysuccinimide 0.5 g / L The wool that has been soaked in the activating solution is taken out and then immediately immersed in a chitosan solution preheated to 60°C; the reaction is continued in a water bath at 60°C for 2 hours; after the reaction is completed, the wool fibers are taken out, thoroughly washed with deionized water, and dried to obtain grafted wool.

[0047] S3 polyester surface treatment: polyester chips are melt-spun into polyester fibers, and the spinneret holes of the melt spinning are cross-shaped; the polyester fibers are subjected to plasma surface treatment with the same parameters as S2 wool grafting. Polyester fibers were immersed in a nano-silver finishing solution and incubated in a water bath at 60°C for 30 minutes; then baked at 150°C for 30 seconds, and then kept at 80°C for 30 minutes; the nano-silver finishing solution contained at least 0.07 g / L of silver. Surface-treated polyester fibers; S4 blended yarn: Grafted wool and surface-treated polyester fibers are mixed evenly, opened and combed (combing weight 20g / m, combing speed 150 nips / min) to obtain a blended fiber sliver; then it is spun, spun and wound to obtain the blended yarn. The mass ratio of grafted wool to surface-treated polyester fiber is 3:7; S5 Post-treatment: After weaving the blended yarn into a plain weave fabric (warp density 280 ends / 10cm, weft density 240 ends / 10cm), the fabric is post-treated using a two-dip two-nip process; the nip rate is maintained at 70%; the resulting fabric is moisture-wicking fiber; the nipped fabric is pre-dried at 80°C for 3 minutes and then baked at 160°C for 2 minutes.

[0048] The temperature of the finishing solution was maintained at 45℃, and the pH was kept at 5-6 with acetic acid.

[0049] Water-based polyester resin finishing agent 30g / L Nano silver antibacterial finishing agent 20g / L Alkylphenol polyoxyethylene ether 1g / L Hydrophilic amino silicone oil 10g / L.

[0050] Example 6: Preparation of sweat-wicking fibers, including the following steps: Preparation of S1 chitosan derivatives: Add chitosan to deionized water (1g:50mL), adjust the pH to 5 by adding dilute acetic acid dropwise, heat to 60℃ and stir until completely dissolved to form a transparent solution; Add succinic anhydride (0.32g succinic anhydride per 1g chitosan) to the clear solution in three portions, stirring until completely dissolved after each addition. Before the reaction begins, 0.1 mol / L NaOH solution is slowly added dropwise to maintain the pH of the system at 7.0-8.0; the reaction is stirred in a water bath at 45-50℃ for 6 hours. After the reaction is complete, slowly pour 3 times the volume of anhydrous ethanol into the reaction solution, stir until the white flocculent precipitate is completely precipitated, and let stand for 1 hour.

[0051] The precipitate was collected by vacuum filtration, washed three times with deionized water, and then washed once with anhydrous ethanol. The product was dried in a vacuum drying oven at 60°C to constant weight to obtain N-succinylated chitosan.

[0052] S2 Wool Grafting: The wool is cleaned with ethanol to remove grease; then, it is placed in a plasma treatment chamber and sealed. The vacuum pump is started to evacuate the base vacuum to below 10 Pa; oxygen is introduced into the chamber, and the gas flow rate is stabilized at 30 sccm using a flow controller; the chamber pressure is stabilized at the working pressure of 50 Pa. The radio frequency source is started at 100 W for 3 minutes; then, it is removed to complete the activation process. The wool fibers were immersed in the grafting solution for grafting and reacted in a water bath at 60°C for 2 hours. After the reaction was completed, the wool fibers were removed, thoroughly washed with deionized water, and dried to obtain grafted wool.

[0053] The grafting solution contains the following components, and the pH is maintained at 5.5 ± 0.1 using MES buffer during the reaction: N-succinylated chitosan 3g / L Carboxyl activator EDC·HCl 2.5g / L N-hydroxysuccinimide 0.5 g / L.

[0054] S3 polyester spinning: Polyester chips are melt-spun into polyester fibers. The spinneret holes for melt spinning are cross-shaped. S4 blended yarn: Grafted wool and polyester fibers are mixed evenly, opened and combed (combing weight 20g / m, combing speed 150 nips / min) to obtain a blended fiber sliver; then it is spun, spun and wound to obtain the blended yarn. The mass ratio of grafted wool to polyester fiber is 3:7; S5 Post-treatment: After weaving the blended yarn into a plain weave fabric (warp density 280 ends / 10cm, weft density 240 ends / 10cm), the fabric is post-treated using a two-dip two-nip process; the nip rate is maintained at 70%; the resulting fabric is moisture-wicking fiber; the nipped fabric is pre-dried at 80°C for 3 minutes and then baked at 160°C for 2 minutes.

[0055] The temperature of the finishing solution was maintained at 45℃, and the pH was kept at 5-6 with acetic acid.

[0056] Water-based polyester resin finishing agent 30g / L Nano silver antibacterial finishing agent 20g / L Alkylphenol polyoxyethylene ether 1g / L Hydrophilic amino silicone oil 10g / L.

[0057] Example 7: Preparation of sweat-wicking fibers, including the following steps: Preparation of S1 chitosan derivatives: Add chitosan to deionized water (1g:50mL), adjust the pH to 5 by adding dilute acetic acid dropwise, heat to 60℃ and stir until completely dissolved to form a transparent solution; Add succinic anhydride (0.32g succinic anhydride per 1g chitosan) to the clear solution in three portions, stirring until completely dissolved after each addition. Before the reaction begins, 0.1 mol / L NaOH solution is slowly added dropwise to maintain the pH of the system at 7.0-8.0; the reaction is stirred in a water bath at 45-50℃ for 6 hours. After the reaction is complete, slowly pour 3 times the volume of anhydrous ethanol into the reaction solution, stir until the white flocculent precipitate is completely precipitated, and let stand for 1 hour.

[0058] The precipitate was collected by vacuum filtration, washed three times with deionized water, and then washed once with anhydrous ethanol. The product was dried in a vacuum drying oven at 60°C to constant weight to obtain N-succinylated chitosan.

[0059] S2 Wool Grafting: The wool is cleaned with ethanol to remove grease; then, it is placed in a plasma treatment chamber and sealed. The vacuum pump is started to evacuate the base vacuum to below 10 Pa; oxygen is introduced into the chamber, and the gas flow rate is stabilized at 30 sccm using a flow controller; the chamber pressure is stabilized at the working pressure of 50 Pa. The radio frequency source is started at 100 W for 3 minutes; then, it is removed to complete the activation process. The wool fibers were immersed in the grafting solution for grafting and reacted in a water bath at 60°C for 2 hours. After the reaction was completed, the wool fibers were removed, thoroughly washed with deionized water, and dried to obtain grafted wool.

[0060] The grafting solution contains the following components, and the pH is maintained at 5.5 ± 0.1 using MES buffer during the reaction: N-succinylated chitosan 3g / L Carboxyl activator EDC·HCl 2.5g / L N-hydroxysuccinimide 0.5 g / L.

[0061] S3 polyester surface treatment: polyester chips are melt-spun into polyester fibers, and the spinneret holes of the melt spinning are cross-shaped; the polyester fibers are subjected to plasma surface treatment with the same parameters as S2 wool grafting. Polyester fibers were immersed in a nano-silver finishing solution and incubated in a water bath at 60°C for 30 minutes; then baked at 150°C for 30 seconds, and then kept at 80°C for 30 minutes; the nano-silver finishing solution contained at least 0.07 g / L of silver. Surface-treated polyester fibers; S4 blended yarn: Grafted wool and surface-treated polyester fibers are mixed evenly, opened and combed (combing weight 20g / m, combing speed 150 nips / min) to obtain a blended fiber sliver; then it is spun, spun and wound to obtain the blended yarn. The mass ratio of grafted wool to surface-treated polyester fiber is 3:7; S5 weaving: After weaving the blended yarn into a plain weave fabric (warp density 280 threads / 10cm, weft density 240 threads / 10cm), the resulting fabric is a moisture-wicking fiber.

[0062] Example 8: Preparation of sweat-wicking fibers, comprising the following steps: S1 blended yarn: Wool and polyester fibers are mixed evenly, opened and combed (combing weight 20g / m, combing speed 150 nips / min) to obtain a blended fiber sliver; then it is spun, spun and wound to obtain the blended yarn. The mass ratio of wool to polyester fiber is 3:7; S2 post-treatment: After the blended yarn is woven into a plain weave fabric (warp density 280 ends / 10cm, weft density 240 ends / 10cm), it is post-treated by a two-dip two-nip process; the nip rate is kept at 70%; the moisture-wicking fiber is obtained; the nipped fabric is pre-dried at 80°C for 3 minutes and then baked at 160°C for 2 minutes.

[0063] The temperature of the finishing solution was maintained at 45℃, and the pH was kept at 5-6 with acetic acid.

[0064] Water-based polyester resin finishing agent 30g / L Nano silver antibacterial finishing agent 20g / L Alkylphenol polyoxyethylene ether 1g / L Hydrophilic amino silicone oil 10g / L.

[0065] The performance of the sweat-wicking fibers prepared in Examples 1-8 above was tested, specifically as follows: Antibacterial effect: Tested according to the method in GB / T 20944.2-2007 Evaluation of antibacterial properties of textiles - Part 2: Absorption method.

[0066] Moisture absorption: Tested according to the method of GB / T 21655.1-2023 Evaluation of moisture absorption and quick-drying properties of textiles - Part 1: Single combination test method.

[0067] Wash resistance test: Following the method described in GB / T 8629-2017 "Test Procedures for Household Washing and Drying of Textiles", the product was washed 50 times in program 5A; then, a UV resistance test was performed again. The results are shown in Table 1 below: Table 1

[0068] In Table 1, Examples 1, 2, 3, and 4 have the most complete processes. Example 1 includes N-succinylated chitosan grafted onto wool (providing hydrophilicity and antibacterial properties), polyester plasma-nano silver treatment (providing antibacterial properties), and finishing (enhancing antibacterial and hydrophilic properties). This comprehensive treatment ensures high performance and washability, resulting in only a slight decrease in performance after washing. The difference between Examples 2 and 3 and Example 1 lies in the blending ratio. In Example 2, due to the higher polyester content and the hydrophilic treatment fully compensating for the hydrophobicity of polyester, the quick-drying and moisture-wicking properties are slightly lower than in Example 1. In Example 3, due to the excessive wool, the wool is grafted with hydrophilic material, but the polyester content is low, resulting in a relatively low nano silver content. At the same time, the wool has high water retention and dries slowly, leading to a significant decrease in both antibacterial and quick-drying properties.

[0069] Example 4 is similar to Example 1, but the polyester spinneret holes are H-shaped. It can be seen that compared with the cross-shaped holes in Example 1, it can slightly improve the sweat-wicking and quick-drying properties, but the difference is not obvious.

[0070] Example 5: Wool grafting used ordinary chitosan (unsuccinated), which has poor hydrophilicity and antibacterial properties; other treatments were similar to Example 1. Because ordinary chitosan has poor antibacterial properties and the grafted material is not wash-resistant, the antibacterial properties are poor, and the decrease in antibacterial properties after washing is significant. Furthermore, the poor hydrophilicity of ordinary chitosan also leads to a significant decrease in its perspiration-wicking and quick-drying properties.

[0071] Example 6: Polyester without surface treatment (no plasma and nano-silver), nano-silver only comes from post-treatment; wool grafting is the same as in Example 1; its antibacterial properties come entirely from post-treatment, resulting in poor antibacterial and wash resistance.

[0072] Example 7: No post-treatment (weaving only), lacking the nano-silver and hydrophilic agents in the finishing solution; relying on wool grafting and polyester nano-silver treatment. Due to the lack of finishing solution, antibacterial effect is only partially effective; polyester nano-silver treatment provides some wash resistance. The lack of hydrophilic finishing agent results in slow moisture absorption.

[0073] Example 8: No wool grafting or polyester treatment; antibacterial and quick-drying properties are provided solely by finishing processes and the fabric itself; however, its washability is extremely poor due to the ease of washing out the finishing process.

[0074] The above detailed description is a specific description of one of the feasible embodiments of the present invention. This embodiment is not intended to limit the patent scope of the present invention. All equivalent implementations or modifications that do not depart from the present invention should be included within the scope of the technical solution of the present invention.

Claims

1. A method for preparing a sweat-wicking fiber, characterized in that, Includes the following steps: Preparation of S1 chitosan derivatives: Chitosan undergoes a nucleophilic acylation reaction with succinic anhydride to generate N-succinylated chitosan; S2 Wool Grafting: The wool is degreased and activated; then the wool is immersed in an N-succinylated chitosan solution for grafting; after grafting, it is washed and dried to obtain grafted wool; S3 Polyester Surface Treatment: Polyester chips are melt-spun into polyester fibers, and the polyester fibers are surface-treated with plasma; then the polyester fibers are treated with nano silver solution to obtain surface-treated polyester fibers; S4 blended yarn: Grafted wool and surface-treated polyester fibers are mixed evenly, opened and combed to obtain a blended fiber sliver; then it is spun, spun and wound to obtain the blended yarn. In grafted wool and surface-treated polyester fibers, the mass ratio of grafted wool is ≤30%; S5 post-treatment: After the blended yarn is woven into fabric, it is post-treated by padding to obtain moisture-wicking fibers; The post-treatment solution contains hydrophilic polyesters.

2. The method for preparing sweat-wicking fibers according to claim 1, characterized in that, The chitosan has a degree of deacetylation ≥85% and a molecular weight ≤200kDa; the N-succinylated chitosan has a degree of substitution ≥0.

5.

3. The method for preparing sweat-wicking fibers according to claim 1, characterized in that, The preparation of the S1 chitosan derivative is as follows: chitosan is dissolved in an acidic solution with a pH of 5-6 and stirred until completely dissolved to obtain a transparent acidic chitosan solution. Add succinic anhydride to the acidic chitosan solution and stir until completely dissolved; Add alkaline solution dropwise to adjust the pH of the system to 7-8, and stir the reaction in a water bath at 45-50℃ for at least 6 hours; add at least 0.32g of succinic anhydride for every 1g of chitosan contained in the solution; After the reaction was complete, the precipitate was collected, filtered, and dried to obtain N-succinylated chitosan.

4. The method for preparing sweat-wicking fibers according to claim 1, characterized in that, The S2 wool grafting process involves degreasing and activating the wool. The wool fibers are then immersed in a grafting solution for grafting, and the reaction is carried out in a water bath at ≥60℃ for at least 2 hours. After the reaction is complete, the wool fibers are removed, washed, and dried to obtain grafted wool. The grafting solution contains at least the following components and is adjusted to a pH of 5.5 ± 0.1: N-succinylated chitosan ≥3g / L Carboxyl activator EDC·HCl ≥2.5g / L Carboxyl activator / enhancer ≥ 0.5 g / L.

5. The method for preparing sweat-wicking fibers according to claim 1, characterized in that, In the S3 polyester surface treatment, the polyester fibers are finished with a nano-silver solution as follows: Polyester fibers were immersed in a nano-silver finishing solution and reacted in a water bath at ≥60°C for at least 30 min; then baked at ≥150°C for at least 30 s, and then kept at ≥80°C for at least 30 min. The nano-silver finishing solution contains at least 0.07 g / L of silver.

6. The method for preparing sweat-wicking fibers according to claim 1, characterized in that, In step S3, the polyester surface treatment, the spinneret of the melt spinning is cross-shaped or H-shaped.

7. The method for preparing sweat-wicking fibers according to claim 1, characterized in that, The post-treatment solution in the S5 post-treatment process contains at least the following components and has a pH of 5-6. Hydrophilic polyester ≥30g / L Antibacterial finishing agent ≥20g / L Non-ionic penetrant ≥1g / L Hydrophilic amino silicone oil ≥10g / L.

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