Light and thin sweat-guiding quick-drying double-layer woven fabric with skin-core structure and preparation method and application of light and thin sweat-guiding quick-drying double-layer woven fabric

Abstract

The invention relates to the technical field of layered materials, and discloses a light, thin, sweat-guiding and quick-drying double-layer woven fabric with a skin-core structure and a preparation method and application of the light, thin, sweat-guiding and quick-drying double-layer woven fabric. The preparation method of the light, thin, sweat-guiding and quick-drying double-layer woven fabric with the skin-core structure comprises the following steps that functional polyester fibers and polypropylene fibers are blended into skin layer first yarn; the first skin layer yarn is subjected to laser drilling to form a micropore structure, and the pretreated first skin layer yarn is obtained; functional cotton fibers, superfine polyethylene fibers and temperature control fibers are blended into core layer second yarns; the pretreated skin layer first yarn and the core layer second yarn are woven into the light, thin, sweat-guiding and quick-drying double-layer woven fabric with the skin-core structure through the double-layer plain weaving technology. The light and thin sweat-guiding quick-drying double-layer woven fabric with the skin-core structure not only has excellent moisture absorption, sweat releasing and quick-drying performance, lasting antibacterial performance and ultraviolet resistance, but also has the light and thin characteristic, and can be used in the fields of sportswear, outdoor equipment, military protection and the like.

Description

Technical Field

[0001] The invention relates to the technical field of layered materials, in particular to a light, sweat-conducting, quick-drying double-layer woven fabric with a skin-core structure, and a preparation method and application thereof. Background Art

[0002] As life continues to develop, people have higher and higher requirements for the comfort of textiles. Especially in the context of sports becoming popular all over the country, the importance of functional clothing has become increasingly prominent. Moisture-absorbing and quick-drying functional clothing refers to clothing that can quickly absorb sweat from the surface of human skin in a hot and humid environment and transfer it to the outer surface of the fabric for evaporation, keeping the skin dry and comfortable.

[0003] For example, Chinese patent application CN107756977A discloses a moisture-wicking fabric and its process, characterized in that: the fabric layers of the fabric are connected by spinning threads, wherein each fabric layer is formed by interweaving warp and weft, the warp is viscose fiber, the fabric layer is provided with a plurality of micropores, and the surface of the fabric layer is covered with a moisture-wicking film. The moisture-wicking fabric and its process have micropores in the fabric layer, and sweat is quickly discharged through the micropores, and then absorbed by the moisture-wicking film, thereby achieving the function of moisture-wicking, but the antibacterial and anti-ultraviolet properties of the moisture-wicking fabric need to be improved. Summary of the invention

[0004] In order to solve the above technical problems, the present invention provides a method for preparing a light, sweat-conducting, quick-drying double-layer woven fabric with a skin-core structure, comprising the following steps: Step 1: modifying polyester fiber by glycidyl methacrylate to obtain surface-modified polyester fiber; immersing the surface-modified polyester fiber in a multifunctional polyurethane emulsion to obtain functionalized polyester fiber; blending the functionalized polyester fiber and polypropylene fiber into a first cortex yarn; and punching the first cortex yarn by laser to form a microporous structure to obtain a pretreated first cortex yarn; Step 2, prepare polyurethane phase change material; obtain temperature control fiber by melt spinning the polyurethane phase change material; blend functionalized cotton fiber, ultrafine polyethylene fiber and temperature control fiber into a second yarn of the core layer; the preparation method of the functionalized cotton fiber comprises the following steps: step B1, using citric acid as a crosslinking agent, modifying cotton fiber by chitosan oligosaccharide to obtain surface modified cotton fiber; step B2, grafting α-lipoic acid on the surface modified cotton fiber to obtain modified cotton fiber; step B3, encapsulating and depositing nanosilver on the modified cotton fiber to obtain functionalized cotton fiber; Step 3: Use a double-layer plain weave process to weave the pretreated skin layer first yarn and the core layer second yarn into a light, sweat-wicking, quick-drying double-layer woven fabric with a skin-core structure.

[0005] Preferably, in step one, the fineness of the first yarn of the cortex is 70D; the mass ratio of the functionalized polyester fiber to the polypropylene fiber is (6-8):1; the diameter of the micropores on the pretreated first yarn of the cortex is 0.5-2 mm, and the gap between adjacent micropores is 4-6 times the diameter of the micropores.

[0006] Furthermore, in the step 1, the preparation method of the functionalized polyester fiber is as follows: adding glycidyl methacrylate and benzoin ethyl ether to acetone, stirring and dissolving to obtain a monomer solution, wherein the concentration of glycidyl methacrylate in the monomer solution is 0.6-1.8 mol / L, and the concentration of benzoin ethyl ether is 0.05-0.15 mol / L; adding the polyester fiber to the above monomer solution for immersion treatment, and then performing an ultraviolet light grafting reaction, washing, and drying to obtain a surface-modified polyester fiber; wherein the conditions for the immersion treatment are: the bath ratio is 1: (15-20), and the immersion time is 2-3 hours; the conditions for the ultraviolet light grafting reaction are: irradiating under a 400-600W high-pressure mercury lamp, and the ultraviolet light is irradiated. The reaction time of external light grafting is 10-20min; the surface modified polyester fiber is immersed in a multifunctional polyurethane emulsion, taken out after immersion treatment, washed, and dried to obtain a functionalized polyester fiber; wherein the immersion treatment conditions are: the bath ratio is 1: (40-60), the immersion temperature is 75-85°C, and the immersion time is 20-28h; in the above process, the polyester fiber is surface modified by glycidyl methacrylate, and epoxy groups are introduced on the surface of the polyester fiber; after the surface modified polyester fiber is immersed in a multifunctional polyurethane emulsion, the epoxy groups on the surface of the surface modified polyester fiber react with the amino groups in the multifunctional polyurethane emulsion, and the multifunctional polyurethane is bonded to the surface of the polyester fiber in the form of a covalent bond.

[0007] Furthermore, in the step 1, the method for preparing the multifunctional polyurethane emulsion comprises the following steps: Step A1, drying nano zinc oxide at 80-120°C for 20-28h to obtain pretreated nano zinc oxide; mixing the pretreated nano zinc oxide, distilled water and ethanol, and ultrasonically dispersing for 60-100min to obtain a nano zinc oxide dispersion; wherein the mass ratio of the pretreated nano zinc oxide, distilled water and ethanol is (3-6): (100-200): (40-80); mixing silane coupling agent KH-550, distilled water and ethanol in a mass ratio of (0.9-1.8): (50-100): (40-80), hydrolyzing for 20-40min, adding acetic acid to adjust the pH to 5-6, and then adding the above nano zinc oxide dispersion, stirring at 70-80°C for 2-4h, cooling to room temperature after the reaction, washing and drying to obtain modified nano zinc oxide; Step A2, in a nitrogen atmosphere, add perfluorooctanoyl chloride to tetrahydrofuran, then add 0.1 g / mL 2-hydroxy-1,3-propylenediamine / methanol solution, react at room temperature for 12-16 hours, then add 7.5% sodium bicarbonate aqueous solution, filter and dry to obtain an intermediate product; wherein the amount ratio of perfluorooctanoyl chloride, tetrahydrofuran, 2-hydroxy-1,3-propylenediamine / methanol solution and sodium bicarbonate aqueous solution is (2-4) g: (10-25) mL: (5-10) mL: (5.2-10.4) mL; Step A3, vacuum drying polybutylene glycol at 70-80°C for 20-30h, mixing polybutylene glycol and isophorone diisocyanate in a nitrogen atmosphere, stirring at 78-82°C for 1.5-2.5h, then adding 2,2-dihydroxymethylpropionic acid and dibutyltin dilaurate, reacting at 74-76°C for 0.8-1.2h, then cooling to 68-72°C, adding 1,4-butanediol for 0.8-1.2h, then adding the intermediate product for 1.5-2.5h, then adding modified nano zinc oxide for 1.5-2.5h, adding acetone during the reaction to reduce the viscosity, then transferring the reaction mixture to a 43-48°C water bath, adding The triethylamine is neutralized for 0.4-0.6h. After the reaction is completed, the mixture is cooled to 30-32°C, ethylenediamine and deionized water are added, and the mixture is sheared and emulsified at a speed of 2000-4000r / min for 20-40min, and rotary evaporated to obtain a multifunctional polyurethane emulsion; wherein the mass ratios of polybutylene glycol, isophorone diisocyanate, 2,2-dihydroxymethylpropionic acid, dibutyltin dilaurate, 1,4-butanediol, intermediate product, modified nano zinc oxide, acetone, triethylamine, ethylenediamine, and deionized water are (3.5-7.5): (2-5.5): (0.4-0.8): (0.001-0.005): (0.6-1): (0.3-0.5): (0.4-0.7): (2-10): (0.3-0.6): (0.3-0.5): (20-30); In the above process, the acyl chloride of perfluorooctanoyl chloride reacts with the amino group of 2-hydroxy-1,3-propylenediamine to generate an intermediate product containing hydroxyl, amino and fluorine-containing long chains; the nano zinc oxide is modified by the silane coupling agent KH-550, and a large number of amino groups are introduced on the surface of the nano zinc oxide. The nano zinc oxide itself has excellent anti-ultraviolet and antibacterial properties. After surface modification, a large number of amino groups and silicon segments are introduced on the surface of the nano zinc oxide; the intermediate product and the modified nano zinc oxide are introduced into the polyurethane segment through the reaction. The addition of nano zinc oxide gives the multifunctional polyurethane The ester emulsion has excellent anti-ultraviolet and antibacterial properties, and the silicon segments and fluorine-containing long chains enable the multifunctional polyurethane emulsion to reduce surface tension, thereby improving the hydrophobic properties of the multifunctional polyurethane emulsion. At the same time, the surface of nano zinc oxide has more gaps, allowing water molecules to form a large angle contact on its surface, reducing the adhesion of water molecules on its surface, thereby achieving a good hydrophobic effect; in addition, the silicon-oxygen bond introduced by the silane coupling agent KH-550 makes the fabric treated with the multifunctional polyurethane emulsion have good softness; further, the large amount of amino groups on the surface of the modified nano zinc oxide in the multifunctional polyurethane can react with the epoxy groups on the surface of the surface-modified polyester fiber, thereby improving the performance of the functionalized polyester fiber.

[0008] Preferably, in the step 2, the preparation method of the temperature-controlled fiber is as follows: polyethylene glycol is dissolved in toluene, and then toluene-2,4-diisocyanate and dibutyltin dilaurate are added, and the reaction is stirred at 38-42°C for 7.5-8.5h, and then N-phenyldiethanolamine and dibutyltin dilaurate are added, and the reaction is continued at 78-82°C for 7.5-8.5h, and finally toluene-2,4-diisocyanate is added and the reaction is continued for 3.5-4.5h, and the obtained reaction product is vacuum dried at 78-82°C for 20-30h to obtain a polyurethane phase change material; wherein polyethylene glycol, toluene, toluene- The mass ratio of 2,4-diisocyanate, dibutyltin dilaurate and N-phenyldiethanolamine is (15-30): (300-500): (0.2-0.6): (0.001-0.005): (0.3-0.6); the polyurethane phase change material is melt-spun to obtain a temperature-controlled fiber, wherein the melt spinning conditions are: a melting temperature of 120-125°C, a spinneret diameter of 0.5mm, and a spinneret stretching ratio of 5-6; in the above process, polyethylene glycol is used as a phase change material, a polyurethane phase change material is formed by reaction, and then a temperature-controlled fiber with bidirectional temperature regulation performance is formed by melt spinning.

[0009] Furthermore, in step 2, the preparation method of functionalized cotton fiber is: Step B1, adding cotton fiber to a water mixed solution containing citric acid and sodium hypophosphite at 75-85°C, reacting for 1-1.5 hours, then adding chitosan oligosaccharide, continuing the reaction for 0.8-1.2 hours, taking out the cotton fiber, completely drying it at 100-105°C, then thermally polymerizing it at 145-155°C for 2-4 minutes, washing it, and drying it to obtain surface-modified cotton fiber; wherein the mass ratio of cotton fiber, citric acid, sodium hypophosphite, and chitosan oligosaccharide is 1:4:2:(1.5-2.5); Step B2, adding α-lipoic acid, 1-(3-dimethylaminopropyl)-3-ethylcarbodiimide hydrochloride, and N-hydroxysuccinimide to a 50% ethanol aqueous solution, mixing and stirring at room temperature for 2-4 hours to obtain a treatment solution; wherein the amount ratio of α-lipoic acid, 1-(3-dimethylaminopropyl)-3-ethylcarbodiimide hydrochloride, N-hydroxysuccinimide, and ethanol aqueous solution is (2-4) g: (1.9-3.8) g: (0.6-1.2) g: (80-100) mL; adding the surface-modified cotton fiber to the above treatment solution, controlling the bath ratio to be 1: (15-25), immersing at room temperature for 14-20 hours, taking out, washing, and drying to obtain modified cotton fiber; Step B3, immersing the modified cotton fiber in a silver nitrate solution with a concentration of 1.8-2.2 g / L, with a bath ratio of 1: (40-60), immersing at 85-95°C for 0.8-1.2 hours, taking out, washing, and drying to obtain functionalized cotton fiber; in the above process, using citric acid as a cross-linking agent to connect chitosan oligosaccharide to the cotton fiber in the form of covalent bonds to obtain surface-modified cotton fiber, which has more hydrophilic groups (amino, carboxyl, hydroxyl) and has good antibacterial properties; then, The amidation reaction between the amino group and the carboxyl group of α-lipoic acid introduces a dynamic disulfide bond on the cotton fiber, thereby obtaining the modified cotton fiber; further, the cleavage of the dynamic disulfide bond can generate a thiol group, and the presence of the amino group and the thiol group on the surface of the modified cotton fiber can promote the reduction and deposition of nanosilver on the surface of the cotton fiber, and the various active groups in the modified cotton fiber can coordinate with the nano-silver to encapsulate the nanosilver in the disulfide bond network to prevent the nanosilver from falling off. Due to the antibacterial property and strong ultraviolet absorption ability of the nanosilver, the cotton fiber is endowed with lasting antibacterial and anti-ultraviolet properties.

[0010] Furthermore, in step 2, the fineness of the second yarn of the core layer is 50D; the mass ratio of the functionalized cotton fiber, the ultrafine polyethylene fiber, and the temperature-control fiber is (7-8): (4-5): (2-3).

[0011] Preferably, in the step three, the pretreated first yarn of the skin layer and the second yarn of the core layer account for 40-46% and 54-60% of the total mass of the thin sweat-conducting and quick-drying double-layer woven fabric with a skin-core structure, respectively; the two layers of the thin sweat-conducting and quick-drying double-layer woven fabric with a skin-core structure are connected by the pretreated first yarn of the skin layer; the thin sweat-conducting and quick-drying double-layer woven fabric with a skin-core structure has a warp density design range of 40-65 strands / cm, a weft density design range of 35-65 strands / cm, and a fabric weight of 100-140g / m 2 .

[0012] The light, thin, sweat-conducting, quick-drying double-layer woven fabric with a skin-core structure is prepared by the method for preparing the light, thin, sweat-conducting, quick-drying double-layer woven fabric with a skin-core structure.

[0013] The light, sweat-conducting, quick-drying double-layer woven fabric with a skin-core structure is used in the fields of sportswear, outdoor equipment, and military protection.

[0014] Compared with the prior art, the present invention has the following beneficial effects: 1. The light, sweat-conducting, quick-drying double-layer woven fabric with a skin-core structure of the present invention has a double-layer structure, wherein the skin layer is made of functional polyester fiber and polypropylene fiber as raw materials, and has excellent hydrophobicity, antibacterial property and anti-ultraviolet property; the core layer is made of functional cotton fiber, ultrafine polyethylene fiber and temperature-control fiber as raw materials, and has excellent hydrophilicity, antibacterial property and anti-ultraviolet property; the core layer utilizes the hydrophilic and hygroscopic properties of ultrafine fiber and natural cotton fiber to quickly absorb sweat and guide it to the hydrophobic skin layer, and the skin layer and the skin layer are connected. The difference in the hydrophilicity of the core layer allows sweat to be quickly absorbed from the inner layer and evaporated through the outer layer, while preventing external moisture from penetrating. In addition, the pre-treated first yarn of the cortex layer has micropores formed by laser punching, forming tiny "moisture-discharging and water-conducting channels" in the cortex, which, combined with the strong moisture-absorbing core layer of the inner layer, not only relies on the hygroscopicity of the fiber, but can achieve rapid moisture flow and drying, thereby improving the moisture absorption, perspiration-discharging and quick-drying performance of the fabric; in addition, the weight of the thin, sweat-conducting and quick-drying double-layer woven fabric with a skin-core structure of the present invention is less than 150g / m 2 , with its light and thin features, it can be widely used in sportswear, outdoor equipment, military protection and other fields; 2. The core layer of the light, sweat-conducting, quick-drying double-layer woven fabric with a skin-core structure of the present invention contains temperature-control fibers, in which polyethylene glycol is encapsulated as a phase change material, so that the temperature-control fibers have a bidirectional temperature regulation performance, thereby improving the comfort of the fabric; 3. The hydrophilicity and hygroscopicity of the functionalized cotton fiber in the core layer of the light, sweat-conducting and quick-drying double-layer woven fabric with a skin-core structure of the present invention are better than those of natural cotton fibers, and due to the introduction of the dynamic disulfide bond network on its surface, the reduction deposition and encapsulation of nanosilver can be achieved, thereby giving the functionalized cotton fiber lasting antibacterial and anti-ultraviolet properties. The grafting of chitosan oligosaccharide on the surface of the cotton fiber cooperates with nanosilver to further improve the antibacterial properties of the cotton fiber; 4. The hydrophobicity of the functionalized polyester fiber in the skin layer of the light, sweat-conducting and quick-drying double-layer woven fabric with a skin-core structure of the present invention is improved compared with that of the polyester fiber, thanks to the silicon segments on the surface of the modified nano-zinc oxide in the multifunctional polyurethane emulsion and the long fluorine-containing chains of the intermediate product. In addition, the nano-zinc oxide also gives the functionalized polyester fiber antibacterial and UV resistance properties; further, a large number of amino groups on the surface of the modified nano-zinc oxide in the multifunctional polyurethane can react with the epoxy groups on the surface of the surface-modified polyester fiber, thereby improving the antibacterial, UV resistance, hydrophobic and wash resistance of the functionalized polyester fiber. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 This is a process flow chart of a method for preparing a light, sweat-conducting, quick-drying double-layer woven fabric with a skin-core structure according to the present invention; Figure 2It is a comparison chart of the antibacterial rate test of Escherichia coli and Staphylococcus aureus of the thin, sweat-conducting, quick-drying double-layer woven fabrics with a skin-core structure prepared in Examples 3-5 of the present invention and Comparative Examples 1-4; Figure 3 It is a comparison chart of the moisture permeability test of the thin, sweat-conducting, quick-drying double-layer woven fabrics with a skin-core structure prepared in Examples 3-5 of the present invention and Comparative Examples 1-4; Figure 4 It is a comparison chart of the evaporation rate test of the thin, sweat-conducting, quick-drying double-layer woven fabric with a skin-core structure prepared in Examples 3-5 of the present invention and Comparative Examples 1-4. DETAILED DESCRIPTION

[0016] The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0017] Example 1 This embodiment discloses a method for preparing a multifunctional polyurethane emulsion, comprising the following steps: Step A1, drying the nano zinc oxide at 100°C for 24h to obtain pretreated nano zinc oxide, taking 4.5g of the pretreated nano zinc oxide, 150g of distilled water, and 60g of ethanol, mixing, and ultrasonically dispersing for 80min to obtain a nano zinc oxide dispersion; mixing 1.4g of silane coupling agent KH-550, 75g of distilled water, and 60g of ethanol, hydrolyzing for 30min, then adding acetic acid to adjust the pH to 5.5, then adding the above nano zinc oxide dispersion, and stirring at 75°C for 3h. After the reaction is completed, cooling to room temperature, washing with anhydrous ethanol by centrifugation for 4 times, and drying to obtain modified nano zinc oxide; Step A2, in a nitrogen atmosphere, add 3 g of perfluorooctanoyl chloride to 17.5 mL of tetrahydrofuran, then add 7.5 mL of 0.1 g / mL 2-hydroxy-1,3-propylenediamine / methanol solution, react at room temperature for 14 h, then add 7.8 mL of 7.5% sodium bicarbonate aqueous solution, filter, and vacuum dry the precipitated product at 65 ° C to obtain an intermediate product; Step A3: vacuum dry the polybutylene glycol at 75°C for 25h. In a nitrogen atmosphere, mix 5.5g of polybutylene glycol and 7.8g of isophorone diisocyanate, stir at 80°C for 2h, then add 0.6g of 2,2-dihydroxymethylpropionic acid and 0.003g of dibutyltin dilaurate, react at 75°C for 1h, then cool to 70°C, add 0.8g of 1,4-Butanediol was reacted for 1 hour, and then 0.4g of the intermediate product was added to react for 2 hours, and then 0.6g of modified nano zinc oxide was added to react for 2 hours. During the reaction, 6g of acetone was added to reduce the viscosity. The reaction mixture was then transferred to a 45°C water bath, and 0.5g of triethylamine was added to neutralize and react for 0.5h. After the reaction was completed, it was cooled to 31°C, 0.4g of ethylenediamine and 25g of deionized water were added, and shear emulsification was performed at a speed of 3000r / min for 30min. The acetone was removed by rotary evaporation at 45°C to obtain a multifunctional polyurethane emulsion.

[0018] Example 2 This embodiment discloses a method for preparing functionalized cotton fiber, comprising the following steps: Step B1, adding cotton fiber to a mixed aqueous solution containing citric acid and sodium hypophosphite at 80°C, reacting for 1.2 hours, then adding chitosan oligosaccharide, continuing the reaction for 1 hour, taking out the cotton fiber, completely drying it at 102°C, and then thermally polymerizing it at 150°C for 3 minutes, washing, and drying to obtain surface-modified cotton fiber; wherein the mass ratio of cotton fiber, citric acid, sodium hypophosphite, and chitosan oligosaccharide is 1:4:2:2; Step B2, adding 3g of α-lipoic acid, 2.9g of 1-(3-dimethylaminopropyl)-3-ethylcarbodiimide hydrochloride (EDC), and 0.9g of N-hydroxysuccinimide (NHS) to 90mL of 50% ethanol aqueous solution, mixing and stirring at room temperature for 3h to activate the carboxyl group, to obtain a treatment solution; adding the surface-modified cotton fiber to the above treatment solution, controlling the bath ratio to 1:20, immersing at room temperature for 17h, taking out, washing, and drying to obtain modified cotton fiber; Step B3, immersing the modified cotton fiber in a silver nitrate solution with a concentration of 2 g / L and a bath ratio of 1:50, immersing the solution at 90° C. for 1 hour, then taking it out, washing it, and drying it to obtain functionalized cotton fiber.

[0019] Example 3 This embodiment discloses a method for preparing a light, sweat-conducting, quick-drying double-layer woven fabric with a skin-core structure, comprising the following steps: Step 1: Add glycidyl methacrylate and benzoin ethyl ether to acetone, stir and dissolve to obtain a monomer solution, wherein the concentration of glycidyl methacrylate in the monomer solution is 0.6 mol / L and the concentration of benzoin ethyl ether is 0.05 mol / L; add polyester fiber to the above monomer solution at a bath ratio of 1:15, soak for 3 hours, then irradiate under a 400 W high-pressure mercury lamp, perform ultraviolet grafting reaction for 10 minutes, and finally wash with xylene, ethanol and water in turn, and dry to obtain a surface-modified polyester fiber. ; The surface-modified polyester fiber is immersed in a multifunctional polyurethane emulsion with a bath ratio of 1:40, and after immersion treatment at 75°C for 28 hours, it is taken out, washed, and dried to obtain a functionalized polyester fiber; the functionalized polyester fiber and the polypropylene fiber are mixed in a mass ratio of 6:1, and blended into a first cortex yarn with a fineness of 70D; holes are punched on the first cortex yarn by laser punching to form micropores with a diameter of 1.2 mm on the first cortex yarn, and the gap between adjacent micropores is 5 times the diameter of the micropores, to obtain a pretreated first cortex yarn; Step 2: Dissolve 15g of polyethylene glycol in 300g of toluene, then add 0.7g of toluene-2,4-diisocyanate and 0.1g of dibutyltin dilaurate, stir and react at 38°C for 8.5h, then add 0.3g of N-phenyldiethanolamine and 0.1g of dibutyltin dilaurate, continue to stir and react at 78°C for 8.5h, finally add 0.2g of toluene-2,4-diisocyanate and continue to react for 3.5h, and vacuum dry the obtained reaction product at 78°C for 30h to obtain a polyurethane phase change material; the polyurethane phase change material is melt-spun to obtain a temperature-controlled fiber, wherein the melt spinning conditions are: the melting temperature is 120°C, the spinneret diameter is 0.5mm, and the spinneret stretching ratio is 5; the functionalized cotton fiber, the ultrafine polyethylene fiber, and the temperature-controlled fiber are mixed in a mass ratio of 7:4:2, and blended into a core layer second yarn with a fineness of 50D; Step 3: Use a double-layer plain weave process to weave the pretreated first yarn of the cortex layer and the second yarn of the core layer into a light, sweat-conducting, quick-drying double-layer woven fabric with a skin-core structure. The pretreated first yarn of the cortex layer and the second yarn of the core layer account for 40% and 60% of the total mass of the light, sweat-conducting, quick-drying double-layer woven fabric with a skin-core structure, respectively. The two layers of the light, sweat-conducting, quick-drying double-layer woven fabric with a skin-core structure are connected by the pretreated first yarn of the cortex layer. The warp density design range of the light, sweat-conducting, quick-drying double-layer woven fabric with a skin-core structure is 40 strands / cm, the weft density design range is 35 strands / cm, and the fabric weight is 100g / m 2 .

[0020] Example 4 This embodiment discloses a method for preparing a light, sweat-conducting, quick-drying double-layer woven fabric with a skin-core structure, comprising the following steps: Step 1: Add glycidyl methacrylate and benzoin ethyl ether to acetone, stir and dissolve to obtain a monomer solution, wherein the concentration of glycidyl methacrylate in the monomer solution is 1.8 mol / L and the concentration of benzoin ethyl ether is 0.15 mol / L; add polyester fiber to the above monomer solution at a bath ratio of 1:20, soak for 3 hours, then irradiate under a 600 W high-pressure mercury lamp, perform ultraviolet grafting reaction for 10 minutes, and finally wash with xylene, ethanol and water in turn, and dry to obtain a surface-modified polyester fiber. ; The surface modified polyester fiber is immersed in a multifunctional polyurethane emulsion with a bath ratio of 1:60, and after immersion treatment at 85°C for 20 hours, it is taken out, washed, and dried to obtain a functionalized polyester fiber; the functionalized polyester fiber and the polypropylene fiber are mixed in a mass ratio of 8:1, and blended into a first cortex yarn with a fineness of 70D; holes are punched on the first cortex yarn by laser punching to form micropores with a diameter of 1.2 mm on the first cortex yarn, and the gap between adjacent micropores is 5 times the diameter of the micropores, to obtain a pretreated first cortex yarn; Step 2: Dissolve 30g of polyethylene glycol in 500g of toluene, then add 1.4g of toluene-2,4-diisocyanate and 0.3g of dibutyltin dilaurate, stir and react at 42°C for 7.5h, then add 0.6g of N-phenyldiethanolamine and 0.3g of dibutyltin dilaurate, continue to stir and react at 82°C for 7.5h, finally add 0.2g of toluene-2,4-diisocyanate and continue to react for 4.5h, and vacuum dry the obtained reaction product at 82°C for 20h to obtain a polyurethane phase change material; the polyurethane phase change material is melt-spun to obtain a temperature-controlled fiber, wherein the melt spinning conditions are: the melting temperature is 125°C, the spinneret diameter is 0.5mm, and the spinneret stretching ratio is 6; the functionalized cotton fiber, the ultrafine polyethylene fiber, and the temperature-controlled fiber are mixed in a mass ratio of 8:5:3, and blended into a core layer second yarn with a fineness of 50D; Step 3: Use a double-layer plain weave process to weave the pretreated first yarn of the cortex layer and the second yarn of the core layer into a light, sweat-conducting, quick-drying double-layer woven fabric with a skin-core structure. The pretreated first yarn of the cortex layer and the second yarn of the core layer account for 46% and 54% of the total mass of the light, sweat-conducting, quick-drying double-layer woven fabric with a skin-core structure, respectively. The two layers of the light, sweat-conducting, quick-drying double-layer woven fabric with a skin-core structure are connected by the pretreated first yarn of the cortex layer. The warp density design range of the light, sweat-conducting, quick-drying double-layer woven fabric with a skin-core structure is 65 yarns / cm, the weft density design range is 65 yarns / cm, and the fabric weight is 140g / m 2 .

[0021] Example 5 This embodiment discloses a method for preparing a light, sweat-conducting, quick-drying double-layer woven fabric with a skin-core structure, comprising the following steps: Step 1: Add glycidyl methacrylate and benzoin ethyl ether to acetone, stir and dissolve to obtain a monomer solution, wherein the concentration of glycidyl methacrylate in the monomer solution is 1.2 mol / L and the concentration of benzoin ethyl ether is 0.1 mol / L; add polyester fiber to the above monomer solution, with a bath ratio of 1:18, soak for 2.5 hours, then irradiate under a 500W high-pressure mercury lamp, perform ultraviolet grafting reaction for 15 minutes, and finally wash with xylene, ethanol and water in turn, and dry to obtain surface-modified polyester fiber. ; The surface-modified polyester fiber is immersed in a multifunctional polyurethane emulsion with a bath ratio of 1:50, and after immersion treatment at 80°C for 24 hours, it is taken out, washed, and dried to obtain a functionalized polyester fiber; the functionalized polyester fiber and the polypropylene fiber are mixed in a mass ratio of 7:1, and blended into a first cortical yarn with a fineness of 70D; holes are punched on the first cortical yarn by laser punching to form micropores with a diameter of 1.2 mm on the first cortical yarn, and the gap between adjacent micropores is 5 times the diameter of the micropores, to obtain a pretreated first cortical yarn; Step 2: Dissolve 22.5g of polyethylene glycol in 400g of toluene, then add 1.1g of toluene-2,4-diisocyanate and 0.2g of dibutyltin dilaurate, stir and react at 40°C for 8h, then add 0.5g of N-phenyldiethanolamine and 0.2g of dibutyltin dilaurate, continue to stir and react at 80°C for 8h, finally add 0.4g of toluene-2,4-diisocyanate and continue to react for 4h, and vacuum dry the obtained reaction product at 80°C for 25h to obtain a polyurethane phase change material; the polyurethane phase change material is melt-spun to obtain a temperature-controlled fiber, wherein the melt spinning conditions are: the melting temperature is 123°C, the spinneret diameter is 0.5 mm, and the spinneret stretching ratio is 5.5; the functionalized cotton fiber, the ultrafine polyethylene fiber, and the temperature-controlled fiber are mixed in a mass ratio of 7.5:4.5:2.5, and blended into a core layer second yarn with a fineness of 50D; Step 3: Use a double-layer plain weave process to weave the pretreated first yarn of the cortex layer and the second yarn of the core layer into a light, sweat-conducting, quick-drying double-layer woven fabric with a skin-core structure. The pretreated first yarn of the cortex layer and the second yarn of the core layer account for 43% and 57% of the total mass of the light, sweat-conducting, quick-drying double-layer woven fabric with a skin-core structure, respectively. The two layers of the light, sweat-conducting, quick-drying double-layer woven fabric with a skin-core structure are connected by the pretreated first yarn of the cortex layer. The warp density design range of the light, sweat-conducting, quick-drying double-layer woven fabric with a skin-core structure is 50 strands / cm, the weft density design range is 52 strands / cm, and the fabric weight is 132g / m 2 .

[0022] The multifunctional polyurethane emulsion and functionalized cotton fiber used in the above-mentioned Examples 3-5 are the multifunctional polyurethane emulsion prepared in Example 1 and the functionalized cotton fiber prepared in Example 2.

[0023] Comparative Example 1 Compared with Example 5, in the process of preparing the functionalized polyester fiber in Comparative Example 1, the surface-modified polyester fiber was replaced with polyester fiber, and other conditions remained unchanged.

[0024] Comparative Example 2 Compared with Example 5, in the process of preparing the first yarn of the skin layer in Comparative Example 2, the surface-modified polyester fiber is used instead of the functionalized polyester fiber, and other conditions remain unchanged.

[0025] Comparative Example 3 Compared with Example 5, in the process of preparing the second yarn of the core layer in Comparative Example 3, modified cotton fiber is used instead of functionalized cotton fiber, and other conditions remain unchanged.

[0026] Comparative Example 4 Compared with Example 5, in Comparative Example 4, during the preparation of the second yarn of the core layer, cotton fiber was used instead of the functionalized cotton fiber, and other conditions remained unchanged.

[0027] In the above embodiments and comparative examples, polybutylene glycol (PTMG, Mn≈2000) was purchased from Jining Fangde Chemical Co., Ltd.; nano zinc oxide, with an average particle size of 30 nm, was purchased from Zhejiang Weiyixin New Material Technology Co., Ltd.; chitosan oligosaccharide, with Mn≈1500Da, was purchased from Shanxi Nanba Biochemical Co., Ltd.; the fineness of ultrafine polyethylene fiber was 1500D, purchased from Dongguan Sovit Special Wire and Tape Co., Ltd.; polyethylene glycol (PEG, Mn = 10,000) was purchased from Aladdin Company and dried at 80°C in a vacuum drying oven for 48 hours before use.

[0028] Experimental example Performance tests were performed on the thin, sweat-wicking, quick-drying double-layer woven fabrics with a skin-core structure prepared in Examples 3-5 and Comparative Examples 1-4.

[0029] 1. Antibacterial performance test: According to the international standard GB / T20944.3-2008 "Evaluation of antibacterial properties of textiles Part 3: Oscillation method", the test bacteria are Escherichia coli and Staphylococcus aureus.

[0030] 2. Anti-ultraviolet performance test: Refer to AATCC 183-2010 to test the ultraviolet protection factor (UPF) of each group of fabric samples.

[0031] 3. Moisture absorption and quick-drying performance test: The evaporation rate is tested in accordance with the national standard GB / T 21655.1-2023, and the moisture permeability is tested in accordance with the national standard GB / T12704-2009 to characterize the moisture absorption and quick-drying performance.

[0032] The test results are shown in Table 1:

[0033] It can be seen from the test results in Table 1 that the thin, sweat-conducting, quick-drying double-layer woven fabrics with a skin-core structure prepared in Examples 3-5 of the present invention have excellent moisture absorption, sweat-wicking, quick-drying properties, long-lasting antibacterial properties, and anti-ultraviolet properties.

[0034] From the comparison between comparative example 1 and example 5, it can be seen that the introduction of epoxy groups into the surface of the polyester fiber by surface modification can better combine the polyurethane in the polyurethane emulsion with the polyester fiber, thereby improving the antibacterial property, anti-ultraviolet property, hydrophobic property and wash resistance of the functionalized polyester fiber; from the comparison between comparative example 2 and example 5, it can be seen that the surface of the surface-modified polyester fiber is treated with the multifunctional polyurethane emulsion, and the silicon chain segments on the surface of the modified nano zinc oxide in the multifunctional polyurethane emulsion and the fluorine-containing long chains of the intermediate products give the functionalized polyester fiber excellent antibacterial property, anti-ultraviolet property, hydrophobicity and wash resistance. The improvement of its hydrophobic property increases the difference in hydrophilicity between the skin layer and the core layer of the thin sweat-conducting and quick-drying double-layer woven fabric with a skin-core structure, promotes the extraction of sweat, and thus improves the moisture absorption, perspiration-wicking and quick-drying properties of the fabric; from the comparison between comparative example 3 and embodiment 5, it can be seen that the deposition and encapsulation of nanosilver in the functionalized cotton fiber endow the cotton fiber with lasting antibacterial and anti-ultraviolet properties; from the comparison between comparative example 4 and embodiment 5, it can be seen that compared with natural cotton fiber, the functionalized cotton fiber has improved performance in all aspects due to the introduction of more hydrophilic groups and the grafting of nanosilver and chitosan oligosaccharide.

[0035] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A method for preparing a light, sweat-conducting, quick-drying double-layer woven fabric with a skin-core structure, characterized in that: The following steps are involved: Step 1: modifying polyester fiber by glycidyl methacrylate to obtain surface-modified polyester fiber; immersing the surface-modified polyester fiber in a multifunctional polyurethane emulsion to obtain functionalized polyester fiber; blending the functionalized polyester fiber and polypropylene fiber into a first cortex yarn; and punching the first cortex yarn by laser to form a microporous structure to obtain a pretreated first cortex yarn; Step 2: preparing polyurethane phase change material; The polyurethane phase change material is melt-spun to obtain a temperature-controlled fiber; the functionalized cotton fiber, the ultrafine polyethylene fiber, and the temperature-controlled fiber are blended into a core layer second yarn; the preparation method of the functionalized cotton fiber comprises the following steps: step B1, using citric acid as a cross-linking agent, modifying the cotton fiber by chitosan oligosaccharide to obtain surface-modified cotton fiber; step B2, grafting α-lipoic acid on the surface-modified cotton fiber to obtain modified cotton fiber; step B3, depositing and encapsulating nanosilver on the modified cotton fiber to obtain functionalized cotton fiber; Step 3: Use a double-layer plain weave process to weave the pretreated skin layer first yarn and the core layer second yarn into a light, sweat-wicking, quick-drying double-layer woven fabric with a skin-core structure.

2. The method for preparing the light, sweat-conducting, quick-drying double-layer woven fabric with a skin-core structure according to claim 1, characterized in that: In the step 1, the fineness of the first yarn of the cortex is 70D; the mass ratio of the functional polyester fiber to the polypropylene fiber is (6-8):1; the diameter of the micropores on the pretreated first yarn of the cortex is 0.5-2 mm, and the gap between adjacent micropores is 4-6 times the diameter of the micropores.

3. The method for preparing the light, sweat-conducting, quick-drying double-layer woven fabric with a skin-core structure according to claim 1, characterized in that: In the step 1, the preparation method of the functionalized polyester fiber comprises: adding glycidyl methacrylate and benzoin ethyl ether to acetone, stirring and dissolving to obtain a monomer solution, wherein the concentration of glycidyl methacrylate in the monomer solution is 0.6-1.8 mol / L, and the concentration of benzoin ethyl ether is 0.05-0.15 mol / L; adding the polyester fiber to the monomer solution for soaking treatment, and then performing ultraviolet light grafting reaction, washing, and drying to obtain the surface-modified polyester fiber; wherein the soaking treatment Treatment conditions: bath ratio of 1: (15-20), immersion time of 2-3h; UV grafting reaction conditions: irradiation under a 400-600W high-pressure mercury lamp, UV grafting reaction time of 10-20min; immersing the surface modified polyester fiber in the multifunctional polyurethane emulsion, taking it out after immersion treatment, washing, and drying to obtain functionalized polyester fiber; wherein, the immersion treatment conditions: bath ratio of 1: (40-60), immersion temperature of 75-85°C, immersion time of 20-28h.

4. The method for preparing the light, sweat-conducting, quick-drying double-layer woven fabric with a skin-core structure according to claim 1, characterized in that: In the step 1, the preparation method of the multifunctional polyurethane emulsion comprises the following steps: Step A1, drying nano zinc oxide at 80-120°C for 20-28h to obtain pretreated nano zinc oxide; mixing the pretreated nano zinc oxide, distilled water and ethanol, and ultrasonically dispersing for 60-100min to obtain a nano zinc oxide dispersion; wherein the mass ratio of the pretreated nano zinc oxide, distilled water and ethanol is (3-6): (100-200): (40-80); mixing silane coupling agent KH-550, distilled water and ethanol in a mass ratio of (0.9-1.8): (50-100): (40-80), hydrolyzing for 20-40min, adding acetic acid to adjust the pH to 5-6, and then adding the above nano zinc oxide dispersion, stirring at 70-80°C for 2-4h, cooling to room temperature after the reaction, washing and drying to obtain modified nano zinc oxide; Step A2, in a nitrogen atmosphere, add perfluorooctanoyl chloride to tetrahydrofuran, then add 2-hydroxy-1,3-propylenediamine / methanol solution, react at room temperature for 12-16 hours, then add sodium bicarbonate aqueous solution, filter and dry to obtain an intermediate product; wherein the amount ratio of perfluorooctanoyl chloride, tetrahydrofuran, 2-hydroxy-1,3-propylenediamine / methanol solution and sodium bicarbonate aqueous solution is (2-4) g: (10-25) mL: (5-10) mL: (5.2-10.4) mL; Step A3, vacuum drying polybutylene glycol, mixing polybutylene glycol and isophorone diisocyanate in a nitrogen atmosphere, stirring at 78-82°C for 1.5-2.5h, then adding 2,2-dihydroxymethylpropionic acid and dibutyltin dilaurate, reacting at 74-76°C for 0.8-1.2h, then cooling to 68-72°C, adding 1,4-butanediol for 0.8-1.2h, then adding the intermediate product for 1.5-2.5h, then adding modified nano zinc oxide for 1.5-2.5h, adding acetone during the reaction, then transferring the reaction mixture to a 43-48°C water bath, adding triethylamine for neutralization reaction for 0.4-0.6h. After the reaction is completed, the mixture is cooled, ethylenediamine and deionized water are added, sheared and emulsified, and rotary evaporated to obtain a multifunctional polyurethane emulsion; wherein the mass ratios of polybutylene glycol, isophorone diisocyanate, 2,2-dihydroxymethylpropionic acid, dibutyltin dilaurate, 1,4-butanediol, intermediate product, modified nano zinc oxide, acetone, triethylamine, ethylenediamine, and deionized water are (3.5-7.5): (2-5.5): (0.4-0.8): (0.001-0.005): (0.6-1): (0.3-0.5): (0.4-0.7): (2-10): (0.3-0.6): (0.3-0.5): (20-30).

5. The method for preparing the light, sweat-conducting, quick-drying double-layer woven fabric with a skin-core structure according to claim 1, characterized in that: In the step 2, the preparation method of the temperature-controlled fiber is as follows: polyethylene glycol is dissolved in toluene, and then toluene-2,4-diisocyanate and dibutyltin dilaurate are added, and the mixture is stirred and reacted at 38-42°C for 7.5-8.5h, and then N-phenyldiethanolamine and dibutyltin dilaurate are added, and the mixture is stirred and reacted at 78-82°C for 7.5-8.5h, and finally toluene-2,4-diisocyanate is added and the mixture is continued to react for 3.5-4.5h, and the obtained reaction product is vacuum dried to obtain polyurethane. Ester phase change material; wherein, the mass ratio of polyethylene glycol, toluene, toluene-2,4-diisocyanate, dibutyltin dilaurate, and N-phenyldiethanolamine is (15-30): (300-500): (0.2-0.6): (0.001-0.005): (0.3-0.6); the polyurethane phase change material is melt-spun to obtain a temperature-controlled fiber, wherein the melt spinning conditions are: a melting temperature of 120-125°C, a spinneret diameter of 0.5mm, and a spinneret stretching ratio of 5-6.

6. The method for preparing the light, sweat-conducting, quick-drying double-layer woven fabric with a skin-core structure according to claim 1, characterized in that: In the step 2, the preparation method of functionalized cotton fiber: Step B1, adding cotton fiber to a water mixed solution containing citric acid and sodium hypophosphite at 75-85°C, reacting for 1-1.5 hours, then adding chitosan oligosaccharide, continuing the reaction for 0.8-1.2 hours, taking out the cotton fiber, completely drying it at 100-105°C, then thermally polymerizing it at 145-155°C for 2-4 minutes, washing it, and drying it to obtain surface-modified cotton fiber; wherein the mass ratio of cotton fiber, citric acid, sodium hypophosphite, and chitosan oligosaccharide is 1:4:2:(1.5-2.5); Step B2, adding α-lipoic acid, 1-(3-dimethylaminopropyl)-3-ethylcarbodiimide hydrochloride, and N-hydroxysuccinimide to an ethanol aqueous solution, mixing and stirring at room temperature for 2-4 hours to obtain a treatment solution; wherein the amount ratio of α-lipoic acid, 1-(3-dimethylaminopropyl)-3-ethylcarbodiimide hydrochloride, N-hydroxysuccinimide, and ethanol aqueous solution is (2-4) g: (1.9-3.8) g: (0.6-1.2) g: (80-100) mL; adding the surface-modified cotton fiber to the above treatment solution, controlling the bath ratio to be 1: (15-25), immersing at room temperature for 14-20 hours, taking out, washing, and drying to obtain modified cotton fiber; Step B3, immersing the modified cotton fiber in a silver nitrate solution with a concentration of 1.8-2.2 g / L and a bath ratio of 1:(40-60), immersing the solution at 85-95° C. for 0.8-1.2 h, then taking it out, washing it, and drying it to obtain functionalized cotton fiber.

7. The method for preparing the light, sweat-conducting, quick-drying double-layer woven fabric with a skin-core structure according to claim 1, characterized in that: In the step 2, the fineness of the second yarn of the core layer is 50D; the mass ratio of the functional cotton fiber, the ultrafine polyethylene fiber, and the temperature control fiber is (7-8): (4-5): (2-3).

8. The method for preparing the light, sweat-conducting, quick-drying double-layer woven fabric with a skin-core structure according to claim 1, characterized in that: In the step 3, the pretreated first yarn of the skin layer and the second yarn of the core layer account for 40-46% and 54-60% of the total mass of the thin sweat-conducting and quick-drying double-layer woven fabric with a skin-core structure, respectively; the two layers of the thin sweat-conducting and quick-drying double-layer woven fabric with a skin-core structure are connected by the pretreated first yarn of the skin layer; the thin sweat-conducting and quick-drying double-layer woven fabric with a skin-core structure has a warp density design range of 40-65 strands / cm, a weft density design range of 35-65 strands / cm, and a fabric weight of 100-140g / m 2 .

9. A thin, sweat-conducting, quick-drying double-layer woven fabric with a skin-core structure prepared by the method for preparing a thin, sweat-conducting, quick-drying double-layer woven fabric with a skin-core structure as described in any one of claims 1 to 8.

10. Application of the light, sweat-conducting, quick-drying double-layer woven fabric with a skin-core structure according to claim 9 in the fields of sportswear, outdoor equipment, and military protection.

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