Moisture-absorbing and air-permeable fabric and preparation method thereof

Abstract

The application discloses a kind of hygroscopic and breathable fabric and its preparation method, using dry spinning process, modified polymer solution is spun into profiled fiber, then profiled fiber and cotton fiber are weighed and opened, after blending carding and water jet reinforcement, pretreatment cloth is prepared.Then the pretreatment cloth is immersed in hydrophilic finishing agent, after drying, baking treatment, the hygroscopic and breathable fabric is prepared.Modified polymer molecular chain contains zwitterionic monomer structure, it can produce strong ion-dipole interaction with water molecules, and then the fabric has moisture absorption.The hydrophilic finishing agent molecular chain contains hydrophilic polyether segment, which can form a hydrophilic network on the surface or inside of the fiber, quickly adsorb and diffuse sweat, thereby giving the fabric moisture absorption and perspiration performance.At the same time, the flexible siloxane long chain and aliphatic long chain in the hydrophilic finishing agent molecule can effectively reduce the friction coefficient between fibers, thereby improving the soft touch of the fabric.

Description

Technical Field

[0001] This invention relates to the field of fabric preparation technology, specifically to a moisture-wicking and breathable fabric and its preparation method. Background Technology

[0002] In high-end sportswear, intimate apparel, baby products, and outdoor gear, the overall comfort of fabrics is a key factor determining the user experience. Balancing and improving the three core properties of moisture absorption, breathability, and softness has always been a focus of industry technological research. Traditional fabrics often struggle to achieve ideal results in all three aspects simultaneously. Regarding moisture absorption, ordinary cotton fabrics absorb moisture but dry slowly, easily causing a damp, cold, and sticky feeling, while some synthetic fibers have weak moisture absorption, making it difficult to effectively wick sweat away from the skin. In terms of breathability, while tight weaves or functional coatings can enhance wind and water resistance, they often sacrifice airflow, leading to stuffiness and heat buildup. Even more prominent is the issue of softness. Many functional fabrics, in order to achieve durability or special protective effects, use relatively stiff fibers or weaving processes, or become stiff and rigid after repeated washing, resulting in a rough feel, lack of elasticity, and a tendency to cause friction and restriction when worn close to the skin, affecting flexibility and comfort during extended activities. Therefore, developing a new fabric technology that can synergistically optimize moisture absorption efficiency, air circulation, and skin-friendly feel is of great practical significance for meeting the market demand for products that combine high performance and high comfort. Summary of the Invention

[0003] The purpose of this invention is to provide a moisture-wicking and breathable fabric and its preparation method, thereby solving the problems of poor moisture absorption and breathability and low softness of ordinary fabrics at present.

[0004] The objective of this invention can be achieved through the following technical solutions:

[0005] A method for preparing a moisture-wicking and breathable fabric specifically includes the following steps:

[0006] Step S1: Mix the modified polymer and N,N-dimethylformamide evenly, and dry spin at a winding speed of 500-700m / min and a tunnel hot air temperature of 80-110℃ to obtain profiled fibers. Weigh and open the profiled fibers and cotton fibers, blend and card them into a web, and then reinforce them with hydroentangling. Finally, dry the web at 100℃ to obtain the pretreated fabric.

[0007] Step S2: Immerse the pretreated fabric in a mixed solution of hydrophilic finishing agent and deionizer, dip and roll, soak for 0.5-1 hour, dry at 100-110℃ for 8-10 minutes, and bake at 160-180℃ for 4-5 minutes to obtain a moisture-wicking and breathable fabric.

[0008] Furthermore, in step S1, the ratio of the modified polymer to N,N-dimethylformamide is 1 mmol:10 mL, a Y-shaped spinneret is used, the weight ratio of the shaped fiber to the cotton fiber is 7-9:1-3, the number of hydroentangling passes is 3, and the hydroentangling pressure is 10 MPa.

[0009] Furthermore, in step S2, the ratio of hydrophilic finishing agent to deionized water is 5g:80mL, and the basis weight of the moisture-wicking and breathable fabric is 100-110g / m². 2 .

[0010] Furthermore, the hydrophilic finishing agent is prepared by the following steps:

[0011] Step A1: Mix polyethylene glycol, thionyl chloride and toluene evenly, stir and add triethylamine under nitrogen atmosphere at a speed of 120-140 r / min, a temperature of 0-20℃, and for 2-6 h to obtain chlorinated polyethylene glycol; Mix triethanolamine monostearate, tetrahydrofuran and anhydrous potassium carbonate evenly, stir and add chlorinated polyethylene glycol under nitrogen atmosphere at a speed of 130-150 r / min, a temperature of 40-80℃, and for 4-10 h to obtain polyether copolymer;

[0012] Step A2: Mix the hydrogen-terminated silicone oil, chloroplatinic acid and isopropanol evenly, stir and add allyl alcohol glycidyl ether and glacial acetic acid at a speed of 120-130 r / min and a temperature of 60-70℃, raise the temperature to 100℃ and react for 8-10 h to obtain epoxy-terminated silicone oil.

[0013] Step A3: Mix the amino-terminated copolymer, epoxy-terminated silicone oil, sodium hydroxide solution and dimethylformamide evenly, and react them at 130-150 r / min and 80-90℃ for 6-8 h to obtain the pretreated polymer. Mix the pretreated polymer, tetrahydrofuran and anhydrous potassium carbonate evenly, and stir at 160-180 r / min and 20-30℃ with nitrogen gas purging for 30-50 min. Add ethyl bromoacetate, raise the temperature to 40-60℃, and react for 12-24 h to obtain the hydrophilic finishing agent.

[0014] Furthermore, the average molecular weight of the polyethylene glycol mentioned in step A1 is 1000, the molar ratio of polyethylene glycol to thionyl chloride is 1:2.2, the amount of triethylamine is 1-3% of the mass of polyethylene glycol, the molar ratio of triethanolamine monostearate to chlorinated polyethylene glycol is 1.2:1, and the amount of anhydrous potassium carbonate is 0.5-1% of the mass of triethanolamine monostearate.

[0015] Furthermore, the relative molecular mass of the terminal hydrogen silicone oil mentioned in step A2 is 208.4, and the ratio of the amount of terminal hydrogen silicone oil, chloroplatinic acid, isopropanol, allyl glycidyl ether and glacial acetic acid is 1 mmol: 40 μg: 5-10 mL: 1.2 mmol: 2-3 mL.

[0016] Furthermore, the molar ratio of the amino-terminated copolymer and the epoxy-terminated silicone oil in step A3 is 1:1.2, the molar concentration of the sodium hydroxide solution is 2 mol / L, the amount of sodium hydroxide solution used is 3-5% of the mass of the amino-terminated copolymer, and the ratio of the amount of pretreated polymer, tetrahydrofuran, anhydrous potassium carbonate and ethyl bromoacetate is 1 mmol: 5-7 mL: 2 mg: 2.5 mmol.

[0017] Furthermore, the modified polymer is prepared by the following steps:

[0018] Step B1: Mix 2-morpholinoethanol, N,N-dimethylformamide and sodium hydride evenly, stir for 30-50 min at a speed of 110-130 r / min and a temperature of 0-5℃, add 1-chloro-2,4-dinitrobenzene, heat to 40-50℃ and react for 5-6 h to obtain intermediate 1. Mix intermediate 1, sodium chloroacetate and tetrahydrofuran evenly, and react for 3-5 h at a speed of 100-120 r / min, a temperature of 60-80℃ and a pH of 8-9 to obtain intermediate 2.

[0019] Step B2: Mix intermediate 2, wet palladium on carbon, methanol and deionized water evenly, and react for 20-24 hours at a speed of 100-110 r / min, a temperature of 20-30℃ and hydrogen gas to obtain intermediate 3.

[0020] Step B3: Mix isophorone diisocyanate and N,N-dimethylformamide evenly, and stir at 120-150 r / min and 60-70℃, while adding intermediates 3,2,2-dimethylolpropionic acid and dibutyltin dilaurate. React for 2-4 h, then stir and add polyethylene glycol and triethanolamine, adjust the pH to 7, and react for 6-10 h to obtain the modified polymer.

[0021] Furthermore, in step B1, the ratio of 2-morpholinoethanol, N,N-dimethylformamide, sodium hydride, and 1-chloro-2,4-dinitrobenzene is 1 mmol:5 mL:1.1 mmol:1 mmol, and the ratio of intermediate 1 to sodium chloroacetate is 1 mmol:1.1 mmol.

[0022] Furthermore, the ratio of intermediate 2, wet palladium on carbon, methanol and deionized water in step B2 is 11 mmol: 800 mg: 15 mL: 60 mL, and the effective substance content of wet palladium on carbon is 10%.

[0023] Furthermore, the ratio of isophorone diisocyanate, N,N-dimethylformamide, intermediate 3,2,2-dimethylolpropionic acid, dibutyltin dilaurate, polyethylene glycol, and triethanolamine in step B3 is 1 mmol: 8-10 mL: 0.6 mmol: 0.2 mmol: 0.12-0.2 mg: 0.35 mmol: 3-5 mL.

[0024] The beneficial effects of this invention are as follows: A spinning solution prepared by uniformly mixing a modified polymer and N,N-dimethylformamide is dry-spun using a Y-shaped spinneret to obtain shaped fibers. These fibers are then subjected to a hydroentangling process to produce a pre-treated fabric. The pre-treated fabric is then impregnated in a mixed solution of a hydrophilic finishing agent and deionized oil. The hydrophilic finishing agent molecules adsorb onto the pre-treated fabric through hydrogen bonding, resulting in a moisture-wicking and breathable fabric.

[0025] Hydrophilic finishing agent: The terminal hydroxyl groups of polyethylene glycol react with thionyl chloride, a chlorinating agent, to electrophilically attack the hydroxyl oxygen atom, yielding chlorinated polyethylene glycol. The hydroxyl groups on triethanolamine monostearate form oxygen anions in the presence of anhydrous potassium carbonate, which nucleophilically attack the terminal chlorine atoms of chlorinated polyethylene glycol, forming ether bonds, thus yielding a polyether copolymer. Chloroplatinic acid is reduced in isopropanol to form a highly reactive zero-valent platinum complex, promoting the reaction between the carbon-carbon double bonds on allyl alcohol glycidyl ether and the silicon-hydrogen bonds on the terminal hydrogen silicone oil, yielding epoxy-terminated silicone oil. The amino groups on the amino-terminated copolymer and the epoxy groups on the epoxy-terminated silicone oil undergo a ring-opening reaction under alkaline conditions to obtain a pretreated polymer. Ethyl bromoacetate is added as an alkylating agent to convert the tertiary amines on the pretreated polymer into ester quaternary ammonium salt structures, yielding a hydrophilic finishing agent.

[0026] Modified polymer: The hydroxyl groups on 2-morpholine ethanol are deionized by sodium hydride to form negative oxygen ions. These negative oxygen ions act as nucleophiles, attacking the chlorine atoms on 1-chloro-2,4-dinitrobenzene to obtain intermediate 1. Under a weakly alkaline environment, the tertiary amine group on intermediate 1 undergoes a substitution reaction with sodium chloroacetate to generate a quaternary ammonium salt structure, yielding intermediate 2. In the presence of wet palladium on carbon catalyst, hydrogen acts as a reducing agent, reducing the nitro group on intermediate 2 to an amino group, yielding intermediate 3. Under the catalysis of dibutyltin dilaurate, excess isophorone diisocyanate first reacts with intermediate 3 and 2,2-dimethylolpropionic acid to generate urea and urethane groups, which then react with polyethylene glycol to obtain the modified polymer.

[0027] The ether bonds in the polyethylene glycol and polyether segments of the hydrophilic finishing agent molecular chain are strongly polar groups that can form hydrogen bonds with water molecules, thereby attracting and locking in moisture. When these hydrophilic segments are introduced into the fabric, they form a hydrophilic network on or within the fiber surface, quickly adsorbing and diffusing sweat, thus giving the fabric moisture-wicking properties. The silicone oil blocks on the hydrophilic finishing agent molecular chain mainly rely on their low surface tension flexible siloxane long chains to form a smooth lubricating film on the fiber surface, directly reducing friction between fibers. At the same time, the stearate quaternary ammonium salt in the hydrophilic finishing agent molecule contains hydrophobic aliphatic long chains, which are arranged outward to cover the fibers, thus producing a soft and smooth feel. Both effectively reduce the static and dynamic coefficients of friction between fibers, thereby improving the softness of the fabric. The modified polymer contains zwitterionic monomer structures, which can generate extremely strong ion-dipole interactions with water molecules, thus exhibiting excellent hydrophilicity. The unique cross-sectional structure of Y-shaped fibers significantly increases the fiber's specific surface area and surface grooves, enabling rapid adsorption and diffusion of moisture through capillary action. Combined with the high-pressure water entanglement of the hydroentangling process, a stable, fluffy, and three-dimensionally microporous nonwoven fabric structure can be formed without damaging the fibers, thus synergistically endowing the fabric with excellent moisture absorption and wicking capabilities and good breathability. Detailed Implementation

[0028] 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.

[0029] Example 1: A method for preparing a moisture-wicking and breathable fabric, specifically including the following steps:

[0030] Step S1: Mix the modified polymer and N,N-dimethylformamide evenly, and dry spin at a winding speed of 500m / min and a tunnel hot air temperature of 80℃ to obtain profiled fibers. Weigh and open the profiled fibers and cotton fibers, blend and card them into a web, and then reinforce them with hydroentangling. Finally, dry them at 100℃ to obtain pretreated fabric.

[0031] Step S2: Immerse the pretreated fabric in a mixed solution of hydrophilic finishing agent and deionizer, dip and roll, soak for 0.5 hours, dry at 100℃ for 8 minutes, and bake at 160℃ for 4 minutes to obtain a moisture-wicking and breathable fabric.

[0032] The modified polymer and N,N-dimethylformamide used in step S1 are in a ratio of 1 mmol:10 mL. A Y-shaped spinneret is used. The weight ratio of the shaped fiber to the cotton fiber is 7:3. There are 3 hydroentangling passes and the hydroentangling pressure is 10 MPa.

[0033] The ratio of hydrophilic finishing agent to deionized water in step S2 is 5g:80mL, and the basis weight of the moisture-wicking and breathable fabric is 100g / m². 2 .

[0034] The hydrophilic finishing agent is prepared by the following steps:

[0035] Step A1: Polyethylene glycol, thionyl chloride and toluene are mixed evenly. Under the conditions of 120 r / min, 0℃ and nitrogen gas, the mixture is stirred and triethylamine is added. The reaction is carried out for 2 hours to obtain chlorinated polyethylene glycol. Triethanolamine monostearate, tetrahydrofuran and anhydrous potassium carbonate are mixed evenly. Under the conditions of 130 r / min, 40℃ and nitrogen gas, the mixture is stirred and chlorinated polyethylene glycol is added. The reaction is carried out for 4 hours to obtain polyether copolymer.

[0036] Step A2: Mix the hydrogen-terminated silicone oil, chloroplatinic acid and isopropanol evenly, stir at 120 r / min and 60°C, add allyl alcohol glycidyl ether and glacial acetic acid, heat to 100°C and react for 8 h to obtain epoxy-terminated silicone oil.

[0037] Step A3: Mix the amino-terminated copolymer, epoxy-terminated silicone oil, sodium hydroxide solution and dimethylformamide evenly, and react for 6 hours at 130 r / min and 80 °C to obtain the pretreated polymer. Mix the pretreated polymer, tetrahydrofuran and anhydrous potassium carbonate evenly, and stir for 30 minutes at 160 r / min and 20 °C with nitrogen gas. Add ethyl bromoacetate, raise the temperature to 40 °C, and react for 12 hours to obtain the hydrophilic finishing agent.

[0038] The polyethylene glycol mentioned in step A1 has an average molecular weight of 1000, the molar ratio of polyethylene glycol to thionyl chloride is 1:2.2, the amount of triethylamine is 1% of the mass of polyethylene glycol, the molar ratio of triethanolamine monostearate to chlorinated polyethylene glycol is 1.2:1, the amount of triethanolamine monostearate is 1 mmol, and the amount of anhydrous potassium carbonate is 0.5% of the mass of triethanolamine monostearate.

[0039] The relative molecular mass of the terminal hydrogen silicone oil mentioned in step A2 is 208.4, and the ratio of the amount of terminal hydrogen silicone oil, chloroplatinic acid, isopropanol, allyl alcohol glycidyl ether and glacial acetic acid is 1 mmol: 40 μg: 5 mL: 1.2 mmol: 2 mL.

[0040] The molar ratio of the amino-terminated copolymer and the epoxy-terminated silicone oil in step A3 is 1:1.2, the amount of amino-terminated copolymer is 1 mmol, the molar concentration of sodium hydroxide solution is 2 mol / L, the amount of sodium hydroxide solution is 3% of the mass of amino-terminated copolymer, and the ratio of the amount of pretreated polymer, tetrahydrofuran, anhydrous potassium carbonate and ethyl bromoacetate is 1 mmol: 5 mL: 2 mg: 2.5 mmol.

[0041] The modified polymer is prepared by the following steps:

[0042] Step B1: Mix 2-morpholinoethanol, N,N-dimethylformamide and sodium hydride evenly, stir for 30 min at 110 r / min and 0 °C, add 1-chloro-2,4-dinitrobenzene, heat to 40 °C and react for 5 h to obtain intermediate 1. Mix intermediate 1, sodium chloroacetate and tetrahydrofuran evenly, and react for 3 h at 100 r / min, 60 °C and pH 8 to obtain intermediate 2.

[0043] Step B2: Mix intermediate 2, wet palladium on carbon, methanol and deionized water evenly, and react for 20 h at a speed of 100 r / min, a temperature of 20 °C and hydrogen gas to obtain intermediate 3.

[0044] Step B3: Mix isophorone diisocyanate and N,N-dimethylformamide evenly, stir and add intermediates 3,2,2-dimethylolpropionic acid and dibutyltin dilaurate at 120 r / min and 60℃, and react for 2 h. Then stir and add polyethylene glycol and triethanolamine, adjust the pH to 7, and react for 6 h to obtain the modified polymer.

[0045] The ratio of 2-morpholinoethanol, N,N-dimethylformamide, sodium hydride and 1-chloro-2,4-dinitrobenzene in step B1 is 1 mmol:5 mL:1.1 mmol:1 mmol, and the ratio of intermediate 1 and sodium chloroacetate is 1 mmol:1.1 mmol.

[0046] The ratio of intermediate 2, wet palladium on carbon, methanol and deionized water in step B2 is 11 mmol: 800 mg: 15 mL: 60 mL, and the effective substance content of wet palladium on carbon is 10%.

[0047] In step B3, the ratio of isophorone diisocyanate, N,N-dimethylformamide, intermediate 3,2,2-dimethylolpropionic acid, dibutyltin dilaurate, polyethylene glycol, and triethanolamine is 1 mmol:8 mL:0.6 mmol:0.2 mmol:0.12 mg:0.35 mmol:3 mL, and the amount of isophorone diisocyanate is 1 mmol.

[0048] Example 2, a method for preparing a moisture-wicking and breathable fabric, specifically includes the following steps:

[0049] Step S1: Mix the modified polymer and N,N-dimethylformamide evenly, and dry spin at a winding speed of 600m / min and a tunnel hot air temperature of 100℃ to obtain profiled fibers. Weigh and open the profiled fibers and cotton fibers, blend and card them into a web, and then reinforce them with hydroentangling before drying at 100℃ to obtain pretreated fabric.

[0050] Step S2: Immerse the pretreated fabric in a mixed solution of hydrophilic finishing agent and deionizer, dip and roll, soak for 0.5 hours, dry at 100°C for 9 minutes, and bake at 170°C for 4 minutes to obtain a moisture-wicking and breathable fabric.

[0051] The modified polymer and N,N-dimethylformamide used in step S1 are in a ratio of 1 mmol:10 mL. A Y-shaped spinneret is used. The weight ratio of the shaped fiber to the cotton fiber is 8:2. There are 3 hydroentangling passes and the hydroentangling pressure is 10 MPa.

[0052] The ratio of hydrophilic finishing agent to deionized water in step S2 is 5g:80mL, and the basis weight of the moisture-wicking and breathable fabric is 100g / m². 2 .

[0053] The hydrophilic finishing agent is prepared by the following steps:

[0054] Step A1: Polyethylene glycol, thionyl chloride and toluene are mixed evenly. Under the conditions of 130 r / min, 10℃ and nitrogen gas, the mixture is stirred and triethylamine is added. The reaction is carried out for 4 h to obtain chlorinated polyethylene glycol. Triethanolamine monostearate, tetrahydrofuran and anhydrous potassium carbonate are mixed evenly. Under the conditions of 140 r / min, 60℃ and nitrogen gas, the mixture is stirred and chlorinated polyethylene glycol is added. The reaction is carried out for 6 h to obtain polyether copolymer.

[0055] Step A2: Mix the hydrogen-terminated silicone oil, chloroplatinic acid and isopropanol evenly, stir at 125 r / min and 65 ℃, add allyl alcohol glycidyl ether and glacial acetic acid, heat to 100 ℃ and react for 9 h to obtain epoxy-terminated silicone oil.

[0056] Step A3: Mix the amino-terminated copolymer, epoxy-terminated silicone oil, sodium hydroxide solution and dimethylformamide evenly, and react for 7 h at a speed of 140 r / min and a temperature of 85 °C to obtain a pretreated polymer. Mix the pretreated polymer, tetrahydrofuran and anhydrous potassium carbonate evenly, and stir for 40 min at a speed of 170 r / min, a temperature of 25 °C and a nitrogen atmosphere. Add ethyl bromoacetate, raise the temperature to 50 °C and react for 20 h to obtain a hydrophilic finishing agent.

[0057] The polyethylene glycol mentioned in step A1 has an average molecular weight of 1000, the molar ratio of polyethylene glycol to thionyl chloride is 1:2.2, the amount of triethylamine is 2% of the mass of polyethylene glycol, the molar ratio of triethanolamine monostearate to chlorinated polyethylene glycol is 1.2:1, the amount of triethanolamine monostearate is 2 mmol, and the amount of anhydrous potassium carbonate is 0.7% of the mass of triethanolamine monostearate.

[0058] The relative molecular mass of the terminal hydrogen silicone oil mentioned in step A2 is 208.4, and the ratio of the amount of terminal hydrogen silicone oil, chloroplatinic acid, isopropanol, allyl alcohol glycidyl ether and glacial acetic acid is 1 mmol: 40 μg: 8 mL: 1.2 mmol: 2 mL.

[0059] The molar ratio of the amino-terminated copolymer and the epoxy-terminated silicone oil in step A3 is 1:1.2, the amount of amino-terminated copolymer is 2 mmol, the molar concentration of sodium hydroxide solution is 2 mol / L, the amount of sodium hydroxide solution is 4% of the mass of amino-terminated copolymer, and the ratio of the amount of pretreated polymer, tetrahydrofuran, anhydrous potassium carbonate and ethyl bromoacetate is 1 mmol:6 mL:2 mg:2.5 mmol.

[0060] The modified polymer is prepared by the following steps:

[0061] Step B1: Mix 2-morpholinoethanol, N,N-dimethylformamide and sodium hydride evenly, stir for 40 min at 120 r / min and 3 °C, add 1-chloro-2,4-dinitrobenzene, heat to 45 °C and react for 5 h to obtain intermediate 1. Mix intermediate 1, sodium chloroacetate and tetrahydrofuran evenly, and react for 4 h at 110 r / min, 70 °C and pH 8 to obtain intermediate 2.

[0062] Step B2: Mix intermediate 2, wet palladium on carbon, methanol and deionized water evenly, and react for 22 h at a speed of 105 r / min, a temperature of 25 °C and hydrogen gas to obtain intermediate 3.

[0063] Step B3: Mix isophorone diisocyanate and N,N-dimethylformamide evenly, stir and add intermediates 3,2,2-dimethylolpropionic acid and dibutyltin dilaurate at a speed of 130 r / min and a temperature of 65℃, and react for 3 h. Then stir and add polyethylene glycol and triethanolamine, adjust the pH to 7, and react for 8 h to obtain the modified polymer.

[0064] The ratio of 2-morpholinoethanol, N,N-dimethylformamide, sodium hydride and 1-chloro-2,4-dinitrobenzene in step B1 is 1 mmol:5 mL:1.1 mmol:1 mmol, and the ratio of intermediate 1 and sodium chloroacetate is 1 mmol:1.1 mmol.

[0065] The ratio of intermediate 2, wet palladium on carbon, methanol and deionized water in step B2 is 11 mmol: 800 mg: 15 mL: 60 mL, and the effective substance content of wet palladium on carbon is 10%.

[0066] In step B3, the ratio of isophorone diisocyanate, N,N-dimethylformamide, intermediate 3,2,2-dimethylolpropionic acid, dibutyltin dilaurate, polyethylene glycol, and triethanolamine is 1 mmol:9 mL:0.6 mmol:0.2 mmol:0.15 mg:0.35 mmol:4 mL, and the amount of isophorone diisocyanate is 2 mmol.

[0067] Example 3, a method for preparing a moisture-wicking and breathable fabric, specifically includes the following steps:

[0068] Step S1: Mix the modified polymer and N,N-dimethylformamide evenly, and dry spin at a winding speed of 700m / min and a hot air temperature of 110℃ to obtain profiled fibers. Weigh and open the profiled fibers and cotton fibers, blend and card them into a web, reinforce them with hydroentangling, and then dry them at 100℃ to obtain pretreated fabric.

[0069] Step S2: Immerse the pretreated fabric in a mixed solution of hydrophilic finishing agent and deionizer, dip and roll, soak for 1 hour, dry at 110°C for 10 minutes, and bake at 180°C for 5 minutes to obtain a moisture-wicking and breathable fabric.

[0070] The modified polymer and N,N-dimethylformamide used in step S1 are in a ratio of 1 mmol:10 mL. A Y-shaped spinneret is used. The weight ratio of shaped fiber to cotton fiber is 9:1. There are 3 hydroentangling passes and the hydroentangling pressure is 10 MPa.

[0071] The ratio of hydrophilic finishing agent to deionized water in step S2 is 5g:80mL, and the basis weight of the moisture-wicking and breathable fabric is 110g / m².2 .

[0072] The hydrophilic finishing agent is prepared by the following steps:

[0073] Step A1: Polyethylene glycol, thionyl chloride and toluene are mixed evenly. Under the conditions of 140 r / min, 20℃ and nitrogen gas, the mixture is stirred and triethylamine is added. The reaction is carried out for 6 h to obtain chlorinated polyethylene glycol. Triethanolamine monostearate, tetrahydrofuran and anhydrous potassium carbonate are mixed evenly. Under the conditions of 150 r / min, 80℃ and nitrogen gas, the mixture is stirred and chlorinated polyethylene glycol is added. The reaction is carried out for 10 h to obtain polyether copolymer.

[0074] Step A2: Mix the hydrogen-terminated silicone oil, chloroplatinic acid and isopropanol evenly, stir at 130 r / min and 70 ℃, add allyl alcohol glycidyl ether and glacial acetic acid, heat to 100 ℃ and react for 10 h to obtain epoxy-terminated silicone oil.

[0075] Step A3: Mix the amino-terminated copolymer, epoxy-terminated silicone oil, sodium hydroxide solution and dimethylformamide evenly, and react for 8 hours at 150 r / min and 90℃ to obtain the pretreated polymer. Mix the pretreated polymer, tetrahydrofuran and anhydrous potassium carbonate evenly, and stir for 50 minutes at 180 r / min and 30℃ with nitrogen gas. Add ethyl bromoacetate, raise the temperature to 60℃ and react for 24 hours to obtain the hydrophilic finishing agent.

[0076] The polyethylene glycol mentioned in step A1 has an average molecular weight of 1000, the molar ratio of polyethylene glycol to thionyl chloride is 1:2.2, the amount of triethylamine is 3% of the mass of polyethylene glycol, the molar ratio of triethanolamine monostearate to chlorinated polyethylene glycol is 1.2:1, the amount of triethanolamine monostearate is 3 mmol, and the amount of anhydrous potassium carbonate is 1% of the mass of triethanolamine monostearate.

[0077] The relative molecular mass of the terminal hydrogen silicone oil mentioned in step A2 is 208.4, and the ratio of the amount of terminal hydrogen silicone oil, chloroplatinic acid, isopropanol, allyl glycidyl ether and glacial acetic acid is 1 mmol: 40 μg: 10 mL: 1.2 mmol: 3 mL.

[0078] The molar ratio of the amino-terminated copolymer and the epoxy-terminated silicone oil in step A3 is 1:1.2, the amount of amino-terminated copolymer is 3 mmol, the molar concentration of sodium hydroxide solution is 2 mol / L, the amount of sodium hydroxide solution is 5% of the mass of amino-terminated copolymer, and the ratio of the amount of pretreated polymer, tetrahydrofuran, anhydrous potassium carbonate and ethyl bromoacetate is 1 mmol:7 mL:2 mg:2.5 mmol.

[0079] The modified polymer is prepared by the following steps:

[0080] Step B1: Mix 2-morpholinoethanol, N,N-dimethylformamide and sodium hydride evenly, stir for 50 min at 130 r / min and 5 °C, add 1-chloro-2,4-dinitrobenzene, heat to 50 °C and react for 6 h to obtain intermediate 1. Mix intermediate 1, sodium chloroacetate and tetrahydrofuran evenly, and react for 5 h at 120 r / min, 80 °C and pH 9 to obtain intermediate 2.

[0081] Step B2: Mix intermediate 2, wet palladium on carbon, methanol and deionized water evenly, and react for 24 h at a speed of 110 r / min, a temperature of 30 °C and hydrogen gas to obtain intermediate 3.

[0082] Step B3: Mix isophorone diisocyanate and N,N-dimethylformamide evenly, stir and add intermediates 3,2,2-dimethylolpropionic acid and dibutyltin dilaurate at a speed of 150 r / min and a temperature of 70℃, and react for 4 h. Then stir and add polyethylene glycol and triethanolamine, adjust the pH to 7, and react for 10 h to obtain the modified polymer.

[0083] The ratio of 2-morpholinoethanol, N,N-dimethylformamide, sodium hydride and 1-chloro-2,4-dinitrobenzene in step B1 is 1 mmol:5 mL:1.1 mmol:1 mmol, and the ratio of intermediate 1 and sodium chloroacetate is 1 mmol:1.1 mmol.

[0084] The ratio of intermediate 2, wet palladium on carbon, methanol and deionized water in step B2 is 11 mmol: 800 mg: 15 mL: 60 mL, and the effective substance content of wet palladium on carbon is 10%.

[0085] In step B3, the ratio of isophorone diisocyanate, N,N-dimethylformamide, intermediate 3,2,2-dimethylolpropionic acid, dibutyltin dilaurate, polyethylene glycol, and triethanolamine is 1 mmol:10 mL:0.6 mmol:0.2 mmol:0.2 mg:0.35 mmol:5 mL, and the amount of isophorone diisocyanate is 3 mmol.

[0086] Comparative Example 1: This comparative example uses 1,2-phenylenediamine instead of intermediate 3 compared to Example 1, with the other steps remaining the same.

[0087] Comparative Example 2: This comparative example uses polyethylene glycol instead of polyether copolymer, while the other steps are the same as in Example 1.

[0088] Comparative Example 3: This comparative example uses a pretreated polymer instead of a hydrophilic finishing agent, while the other steps are the same as in Example 1.

[0089] Comparative Example 4: In this comparative example, compared with Example 1, ordinary circular fibers were obtained using a spinneret in step S1, while the other steps were the same.

[0090] Comparative Example 5: Compared with Example 1, in step S1, the fibers were knitted to obtain a pre-treated fabric.

[0091] The moisture-wicking and breathable fabrics prepared in Examples 1-3 and Comparative Examples 1-5 were tested for air permeability according to GB / T5453-1997 "Textiles - Determination of Air Permeability of Fabrics". The test results are shown in Table 1. The test area was 20 cm². 2 The pressure difference was 100 Pa, and the test was performed 3 times, with the average value taken.

[0092] The moisture-wicking and breathable fabrics prepared in Examples 1-3 and Comparative Examples 1-5 were tested for stiffness and flexibility according to GB / T18318.1-2009 "Determination of bending properties of textiles - Part 1: Inclined plane method". The test results are shown in Table 1. The test procedure used the inclined plane cantilever method. A strip sample of 250mm × 25mm was cut and a TG022D fully automatic fabric stiffness tester was used. The extension speed was set to 4mm / min. The bending stiffness was calculated based on the recorded extension length and bending length of the sample.

[0093] The moisture-wicking and breathable fabrics prepared in Examples 1-3 and Comparative Examples 1-5 were tested for water absorption rate according to GB / T21655.1-2023 "Evaluation of Moisture Absorption and Quick-Drying Properties Part 1: Unidirectional Combined Test Method". The test results are shown in Table 1. During the test, three flat, wrinkle-free samples of the same size (10cm × 10cm) were cut from each material. The samples were placed in standard atmospheric conditions to achieve humidification, and the initial mass of each sample was recorded as M0. The samples were then immersed in deionized water for 5 minutes. Afterward, the samples were removed and laid out vertically under natural conditions, allowing the water to drip naturally. The sample was considered to have stopped dripping when the time interval between two drops was not less than 30 seconds. Immediately after the sample stopped dripping, its mass was weighed and recorded as M. The water absorption rate of each sample was calculated using the formula (M - M0) / M0 × 100%.

[0094] Table 1

[0095] Example 1 Example 2 Example 3 Comparative Example 1 Comparative Example 2 Comparative Example 3 Comparative Example 4 Comparative Example 5 Rigidity / flexibility (mg·cm) 2.72 2.64 2.57 2.75 2.95 2.88 2.73 2.73 Breathability (mm / s) 2455 2560 2672 2452 2448 2450 2042 2063 Water absorption rate (%) 390 422 454 304 350 372 332 360

[0096] Table 1 shows that the stiffness and flexibility of the moisture-wicking and breathable fabrics prepared in Examples 1-3 are in the range of 2.57-2.72 mg·cm, the breathability is in the range of 2455-2672 mm / s, and the water absorption rate is in the range of 390-454%. This indicates that the present invention has good moisture-wicking and breathability as well as high softness.

[0097] The above description is merely an example and illustration of the concept of the present invention. Those skilled in the art can make various modifications or additions to the specific embodiments described or use similar methods to replace them, as long as they do not deviate from the concept of the invention or exceed the scope defined in the claims, they should all fall within the protection scope of the present invention.

Claims

1. A method for preparing a moisture-wicking and breathable fabric, characterized in that: Specifically, the steps include the following: Step S1: Mix the modified polymer and N,N-dimethylformamide evenly, perform dry spinning to obtain profiled fibers, weigh and open the profiled fibers and cotton fibers, blend and card them into a web, then reinforce with hydroentanglement, and dry to obtain pretreated fabric. Step S2: The pre-treated fabric is immersed in a mixed solution of hydrophilic finishing agent and deionizer, and then soaked and rolled, followed by soaking, drying and baking treatments to obtain a moisture-wicking and breathable fabric. The ratio of the modified polymer to N,N-dimethylformamide in step S1 is 1 mmol: 10 mL, and the weight ratio of the shaped fiber to the cotton fiber is 7-9: 1-3. The ratio of hydrophilic finishing agent to deionized water in step S2 is 5g:80mL.

2. The method for preparing a moisture-wicking and breathable fabric according to claim 1, characterized in that: The hydrophilic finishing agent is prepared by the following steps: Step A1: Mix polyethylene glycol, thionyl chloride and toluene and stir, then add triethylamine and react to obtain chlorinated polyethylene glycol. Mix triethanolamine monostearate, tetrahydrofuran and anhydrous potassium carbonate and stir, then add chlorinated polyethylene glycol and react to obtain polyether copolymer. Step A2: Mix and stir the hydrogen-terminated silicone oil, chloroplatinic acid and isopropanol, add allyl alcohol glycidyl ether and glacial acetic acid, heat up and react to obtain epoxy-terminated silicone oil. Step A3: Mix the amino-terminated copolymer, epoxy-terminated silicone oil, sodium hydroxide solution and dimethylformamide evenly to obtain a pretreated polymer. Mix the pretreated polymer, tetrahydrofuran and anhydrous potassium carbonate, stir, add ethyl bromoacetate, heat and react to obtain a hydrophilic finishing agent.

3. The method for preparing a moisture-wicking and breathable fabric according to claim 2, characterized in that: In step A1, the molar ratio of polyethylene glycol to thionyl chloride is 1:2.2, the amount of triethylamine is 1-3% of the mass of polyethylene glycol, the molar ratio of triethanolamine monostearate to chlorinated polyethylene glycol is 1.2:1, and the amount of anhydrous potassium carbonate is 0.5-1% of the mass of triethanolamine monostearate.

4. The method for preparing a moisture-wicking and breathable fabric according to claim 2, characterized in that: The ratio of the amount of terminal hydrogen silicone oil, chloroplatinic acid, isopropanol, allyl alcohol glycidyl ether and glacial acetic acid used in step A2 is 1 mmol: 40 μg: 5-10 mL: 1.2 mmol: 2-3 mL.

5. The method for preparing a moisture-wicking and breathable fabric according to claim 2, characterized in that: The molar ratio of the amino-terminated copolymer and the epoxy-terminated silicone oil mentioned in step A3 is 1:1.2, the amount of sodium hydroxide solution used is 3-5% of the mass of the amino-terminated copolymer, and the ratio of the amount of pretreated polymer, tetrahydrofuran, anhydrous potassium carbonate and ethyl bromoacetate is 1 mmol: 5-7 mL: 2 mg: 2.5 mmol.

6. The method for preparing a moisture-wicking and breathable fabric according to claim 1, characterized in that: The modified polymer is prepared by the following steps: Step B1: Mix 2-morpholine ethanol, N,N-dimethylformamide and sodium hydride, add 1-chloro-2,4-dinitrobenzene, heat and react to obtain intermediate 1. Mix intermediate 1, sodium chloroacetate and tetrahydrofuran evenly and react to obtain intermediate 2. Step B2: Mix intermediate 2, wet palladium on carbon, methanol and deionized water evenly and react to obtain intermediate 3; Step B3: Mix isophorone diisocyanate and N,N-dimethylformamide, add intermediates 3,2,2-dimethylolpropionic acid and dibutyltin dilaurate, stir, add polyethylene glycol and triethanolamine, adjust pH, and continue the reaction to obtain the modified polymer.

7. The method for preparing a moisture-wicking and breathable fabric according to claim 6, characterized in that: The ratio of 2-morpholinoethanol, N,N-dimethylformamide, sodium hydride and 1-chloro-2,4-dinitrobenzene in step B1 is 1 mmol:5 mL:1.1 mmol:1 mmol, and the ratio of intermediate 1 and sodium chloroacetate is 1 mmol:1.1 mmol.

8. The method for preparing a moisture-wicking and breathable fabric according to claim 6, characterized in that: The ratio of intermediate 2, wet palladium on carbon, methanol and deionized water in step B2 is 11 mmol: 800 mg: 15 mL: 60 mL.

9. The method for preparing a moisture-wicking and breathable fabric according to claim 6, characterized in that: The ratio of isophorone diisocyanate, N,N-dimethylformamide, intermediate 3,2,2-dimethylolpropionic acid, dibutyltin dilaurate, polyethylene glycol, and triethanolamine in step B3 is 1 mmol: 8-10 mL: 0.6 mmol: 0.2 mmol: 0.12-0.2 mg: 0.35 mmol: 3-5 mL.

10. A moisture-wicking and breathable fabric, characterized in that: Prepared according to any one of the preparation methods described in claims 1-9.