Anti-pilling warm-keeping acrylic fabric and preparation method thereof

Abstract

This invention relates to the field of layered materials technology and discloses an anti-pilling, heat-insulating acrylic fabric and its preparation method. The preparation method of the anti-pilling, heat-insulating acrylic fabric includes the following steps: acrylic fibers are pretreated with 1,3-diamino-2-propanol, and then loaded with silane-modified phase change microcapsules to obtain modified acrylic fibers; the modified acrylic fibers are blended with cotton fibers to form a blended yarn, which is then knitted to obtain an inner layer fabric and an outer layer fabric; polyurethane heat-insulating fibers are spun and knitted to obtain a middle layer fabric; the inner layer fabric, middle layer fabric, and outer layer fabric are laminated to obtain a composite fabric; the composite fabric is impregnated in a multifunctional finishing agent emulsion to obtain the anti-pilling, heat-insulating acrylic fabric. The anti-pilling, heat-insulating acrylic fabric of this invention has excellent wash resistance, anti-pilling properties, heat retention properties, moisture absorption properties, and antistatic properties.

Description

Technical Field

[0001] This invention relates to the field of layered materials technology, specifically to an anti-pilling and heat-insulating acrylic fabric and its preparation method. Background Technology

[0002] Acrylic fiber is widely used in winter clothing fabrics due to its good warmth retention, resistance to mildew and moths, and soft, fluffy texture. However, acrylic fabrics have problems such as poor moisture absorption and breathability, and are prone to pilling, especially in dry winter environments where static electricity is more pronounced, exacerbating the pilling problem. Therefore, solving the pilling and static electricity issues of acrylic fabrics can expand their application range.

[0003] For example, Chinese patent application CN119593128A discloses an anti-pilling acrylic fabric and its production method, which uses acetate fiber as raw material and blends it with anti-pilling acrylic fiber. It possesses excellent natural breathability and quick-drying properties, retaining not only the warmth and softness of acrylic fiber but also showcasing the vibrant colors and bright appearance of acetate fiber. It is smooth to the touch, easy to care for, and wrinkle-resistant. However, the antistatic and warmth retention properties of this anti-pilling acrylic fabric need further improvement. Summary of the Invention

[0004] To address the aforementioned technical problems, this invention provides a method for preparing anti-pilling and warm acrylic fabric, comprising the following steps:

[0005] Step 1: Preparation of modified acrylic fiber; The preparation method of the modified acrylic fiber includes: acrylic fiber pretreated with 1,3-diamino-2-propanol, and then loaded with silane-modified phase change microcapsules to obtain modified acrylic fiber; wherein, the silane-modified phase change microcapsules are obtained by the following method: Step S1: Preparation of organosilicon-modified polyurethane and modified nano-silicon carbide; using methyl methacrylate as shell material, organosilicon-modified polyurethane as shell material crosslinking agent, modified nano-silicon carbide as shell material modifier, and paraffin as phase change core material to prepare phase change microcapsules; Step S2: The phase change microcapsules are sequentially modified with polydopamine and silane coupling agent KH-550 to obtain silane-modified phase change microcapsules;

[0006] Step 2: Modified acrylic fiber is blended with cotton fiber to form a blended yarn, which is then knitted to obtain the inner and outer fabrics; polyurethane heat-generating and warming fiber is spun and knitted to obtain the middle layer fabric; the inner, middle, and outer fabrics are then laminated to obtain the composite fabric.

[0007] Step 3: Diallyl dimethylammonium chloride and mercaptoethylamine react to obtain an intermediate; 2,4,6-trichloropyrimidine-5-carboxylic acid reacts sequentially with sulfoxide and the intermediate to obtain a multifunctional finishing agent; the multifunctional finishing agent is mixed with other components and emulsified to obtain a multifunctional finishing agent emulsion; the composite fabric is impregnated in the multifunctional finishing agent emulsion to obtain an anti-pilling and warm acrylic fabric.

[0008] Preferably, in step one, the method for preparing the modified acrylic fiber specifically includes: immersing the acrylic fiber in a 9% (w / w) aqueous solution of 1,3-diamino-2-propanol at a bath ratio of 1:(15-25), treating it at 105-115°C for 1-2 hours, then removing it, squeezing, washing, and drying to obtain pretreated acrylic fiber; adding the pretreated acrylic fiber to a silane-modified phase change microcapsule dispersion, then adding a glutaraldehyde / ethanol solution, reacting at 58-62°C for 2.5-3.5 hours, leaching, washing, and drying to obtain the modified acrylic fiber; wherein, the pretreatment... The mass ratio of acrylic fiber, silane-modified phase change microcapsule dispersion, and glutaraldehyde / ethanol solution was 1:(10-15):(6-9). In the above process, the cyano groups on the surface of the acrylic fiber reacted with the amino groups of 1,3-diamino-2-propanol, introducing hydrophilic amino and hydroxyl groups onto the surface of the acrylic fiber to obtain pretreated acrylic fiber. Then, the pretreated acrylic fiber was added to the silane-modified phase change microcapsule dispersion, and glutaraldehyde was used as a crosslinking agent. Through the reaction between the aldehyde group and the amino group, the silane-modified phase change microcapsules were loaded onto the pretreated acrylic fiber in the form of chemical bonds to obtain modified acrylic fiber.

[0009] Further, in step one, the preparation method of the organosilicon-modified polyurethane and modified nano-silicon carbide in step S1 specifically includes: mixing dihydroxy-terminated polydimethylsiloxane, isophorone diisocyanate, and dibutyltin dilaurate, reacting them in a nitrogen atmosphere at 58-62℃ for 2.5-3.5 h, then adding 2-hydroxyethyl acrylate and n-butyl acetate, continuing the reaction for another 2.5-3.5 h, purifying, and obtaining organosilicon-modified polyurethane; wherein the mass ratio of dihydroxy-terminated polydimethylsiloxane, isophorone diisocyanate, dibutyltin dilaurate, 2-hydroxyethyl acrylate, and n-butyl acetate is (10-15):(2.3-3.5):(0 .06-0.09): (1.3-1.9): (30-40); Nano silicon carbide powder, silane coupling agent KH-570, ethanol, and deionized water are mixed in a mass ratio of (2-5): (1-3): (80-150): (15-28), the pH is adjusted to 5, and then the mixture is stirred at 58-62℃ for 1.5-2.5h. After purification, modified nano silicon carbide is obtained; In the above process, dihydroxy-terminated polydimethylsiloxane and 2-hydroxyethyl acrylate are introduced into the polyurethane structure to obtain organosilicon-modified polyurethane containing polysiloxane structure and carbon-carbon double bonds; Nano silicon carbide is modified by silane coupling agent KH-570 to introduce carbon-carbon double bonds on its surface.

[0010] Further, the preparation method of phase change microcapsules in step S1 specifically includes: mixing sodium dodecyl sulfate, octylphenol polyoxyethylene ether, and deionized water in a mass ratio of (0.2-0.4):(0.1-0.2):(32-64), and stirring at 63-68℃ for 10-20 min to obtain an aqueous phase; mixing organosilicon-modified polyurethane, methyl methacrylate, paraffin wax, dodecyl mercaptan, modified nano-silicon carbide, and azobisisobutyronitrile in a mass ratio of (0.2-0.4):(2-4):(6-12):(0.06-0.12):(0.16-0.2):(0.05-0.1), and stirring at 63-68℃ for 10-20 min to obtain an oil phase; adding the oil phase to the aqueous phase, and stirring at 63-68℃... Emulsification was carried out at 9000-11000 rpm for 2-4 minutes, followed by reaction at 68-72℃ for 2.5-3.5 hours to obtain phase change microcapsules. In the above process, paraffin was used as the phase change core material, methyl methacrylate as the shell material, organosilicon-modified polyurethane as the shell material crosslinking agent, and modified nano-silicon carbide as the shell material modifier to obtain phase change microcapsules. The introduction of dihydroxyl-terminated polydimethylsiloxane in organosilicon-modified polyurethane improved the heat resistance of the phase change microcapsules and the crosslinking density of the shell material, and prevented leakage of the phase change core material. Nano-silicon carbide has good thermal conductivity, electrical conductivity, and solar light absorption capacity, which can improve the thermal conductivity and photothermal conversion efficiency of the phase change microcapsules, thus giving the phase change microcapsules excellent heat storage capacity, antistatic properties, and photothermal conversion performance.

[0011] Preferably, the preparation method of silane-modified phase change microcapsules in step S2 specifically includes: adding phase change microcapsules to Tris-HCl buffer, then adding dopamine, stirring at room temperature for 10-14 h to obtain polydopamine-modified phase change microcapsules; wherein, the ratio of phase change microcapsules, Tris-HCl buffer, and dopamine is (2-4) g: (100-150) mL: (0.2-0.4) g; mixing silane coupling agent KH-550, ethanol, and polydopamine-modified phase change microcapsules at a mass ratio of (1-3): (80-120): (10-12), adjusting the pH to 8.5-9, and refluxing at 75-80℃ for 4-6 h to obtain silane-modified phase change microcapsules. In the above process, under alkaline conditions, dopamine polymerizes on the surface of phase change microcapsules to form polydopamine, resulting in polydopamine-modified phase change microcapsules. The introduction of polydopamine can better encapsulate the phase change core material, making the microcapsule surface smoother, and introducing a large number of hydrophilic phenolic hydroxyl groups on the surface of the phase change microcapsules, thereby improving the hydrophilic hygroscopic properties and antistatic properties of the phase change microcapsules. In addition, polydopamine has a broad absorption spectrum from ultraviolet to near-infrared, which can effectively improve the photothermal conversion efficiency of the phase change microcapsules. Furthermore, the polydopamine-modified phase change microcapsules are modified with silane coupling agent KH-550, introducing amino groups on their surface to provide reactive groups, allowing them to be chemically bonded to pretreated acrylic fibers.

[0012] Preferably, in step two, the preparation method of the polyurethane heat-generating and heat-insulating fiber specifically includes: degassing a 20% polyurethane solution and injecting it as a spinning solution into a coagulation bath composed of ethanol and water in a volume ratio of (6-7):(3-4), at an injection rate of 0.85 mL / min, a collection rate of 0.15 rad / s, and a coagulation bath temperature of 40°C; drying to obtain porous polyurethane fiber; immersing the porous polyurethane fiber in a 0.6% polyvinyl alcohol aqueous solution for 3-5 min at a bath ratio of 1:(15-25), and then drying it at 62-68°C for 20-40 min to obtain polyvinyl alcohol-modified polyurethane fiber; soaking the polyvinyl alcohol-modified polyurethane fiber in a 5-7 g / L MXene aqueous dispersion for 15-25 min at a bath ratio of 1:(15-25), and drying it at 62-68°C for 20-40 min, repeating the soaking process. The polyurethane heating and heat-insulating fiber is obtained by repeating the process 3-5 times. In the above process, using soft and hard polyurethane segments as the spinning matrix, porous polyurethane fibers with a porous structure are prepared by wet spinning and phase separation technology. The pore structure of the porous polyurethane fibers reduces heat conduction and convection, thus exhibiting good heat insulation performance. Furthermore, the abundant hydroxyl groups in polyvinyl alcohol enhance the hydrophilic and moisture-absorbing properties and antistatic properties of the fibers. Due to its inherent adhesiveness, a strong interfacial bond is formed between MXene, polyvinyl alcohol, and porous polyurethane fibers, allowing MXene to be deposited more firmly on the fiber surface. MXene has excellent hydrophilicity and conductivity, and its inherent large surface area and semiconductor localized surface plasmon resonance effect give it a photothermal conversion capacity close to 100%. Therefore, after modification with polyvinyl alcohol and MXene, the porous polyurethane fibers exhibit excellent heating and heat-insulating properties, hydrophilic and moisture-absorbing properties, and antistatic properties.

[0013] Preferably, in step two, the weight of the intermediate layer fabric is 80-100 g / m². 2 The weight of the inner and outer fabrics is 100-120 g / m². 2 The blended yarn has a count of 30-40S (English count), and the mass ratio of modified acrylic fiber to cotton fiber is 1:1.

[0014] Preferably, in step three, the preparation method of the multifunctional finishing agent emulsion specifically includes: mixing diallyl dimethyl ammonium chloride, mercaptoethylamine, and methanol, stirring, heating to 50-55°C, then adding azobisisobutyronitrile, stirring and reacting for 4-5 hours to obtain an intermediate; wherein the mass ratio of diallyl dimethyl ammonium chloride, mercaptoethylamine, methanol, and azobisisobutyronitrile is (1.6-3.2):(1.5-3):(50-80):(0.02-0.03); 2,4,6-trichloropyrimidine-5-methyl... The acid was added to N,N-dimethylformamide, stirred, and then sulfoxide was added. The mixture was heated to 40-60℃ and reacted for 1-3 hours. The temperature was then raised to 90℃, and then the intermediate was added. The mixture was reacted at 85-95℃ for 20-25 hours and purified to obtain a multifunctional finishing agent. The mass ratio of 2,4,6-trichloropyrimidin-5-carboxylic acid, N,N-dimethylformamide, sulfoxide, and the intermediate was (2.2-4.4):(80-100):(3-5):(1.6-3.2). The multifunctional finishing agent and Span... Mix 20 and Tween 80 with water at a mass ratio of (10-20):20:30:(30-40) and emulsify for 30-40 minutes to obtain a multifunctional finishing agent emulsion. In the above process, the carbon-carbon double bond of diallyl dimethyl ammonium chloride reacts with the mercapto group of mercaptoethylamine to form an intermediate containing an amino and quaternary ammonium salt structure. 2,4,6-trichloropyrimidine-5-carboxylic acid reacts with sulfoxide dichloroethylene, and the carboxyl group is converted into an acyl chloride group. The acyl chloride group then reacts with the amino group of the intermediate to obtain a multifunctional finishing agent. The quaternary ammonium salt structure in the multifunctional finishing agent has hydrophilic and antistatic properties, while the chlorine in 2,4,6-trichloropyrimidine-5-carboxylic acid can undergo a cross-linking reaction with the hydroxyl groups in the modified acrylic fiber and cotton fiber to prevent fiber movement and enhance the fabric's wash resistance, anti-pilling properties and antistatic properties.

[0015] Preferably, in step three, the bath ratio of the composite fabric to the multifunctional finishing agent emulsion is 1:(25-35); the impregnation conditions are: heating from 1-2℃ / min to 90-95℃, and impregnating for 40-50 minutes.

[0016] The anti-pilling and warm acrylic fabric is prepared by the aforementioned method.

[0017] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0018] 1. The inner and outer layers of the anti-pilling and warm acrylic fabric of the present invention are both made of modified acrylic fiber and cotton fiber blend. Cotton fiber has good skin-friendly properties, anti-pilling properties, hydrophilic moisture absorption properties and antistatic properties. The modified acrylic fiber is obtained by loading silane-modified phase change microcapsules onto acrylic fiber in the form of chemical bonds. It has good water washability. The presence of silane-modified phase change microcapsules gives the modified acrylic fiber excellent warmth retention and heat generation properties, moisture absorption properties and antistatic properties. At the same time, the loading of silane-modified phase change microcapsules increases the roughness of the acrylic fiber surface, which increases the cohesion between fibers and improves the anti-pilling properties of the fabric.

[0019] 2. The middle layer of the anti-pilling and heat-insulating acrylic fabric of the present invention is made of polyurethane heat-insulating fiber. The present invention uses polyurethane as the spinning matrix and employs wet spinning and phase separation technology to prepare porous polyurethane fibers with good thermal insulation properties. After modification with polyvinyl alcohol and MXene, the porous polyurethane fibers are obtained as polyurethane heat-insulating fibers with excellent heat-insulating properties, washability, moisture absorption, and antistatic properties.

[0020] 3. This invention uses a multifunctional finishing agent emulsion to treat composite fabrics to prepare anti-pilling and warm acrylic fabrics. The quaternary ammonium salt structure in the multifunctional finishing agent has hydrophilic moisture absorption and antistatic properties, while the chlorine in 2,4,6-trichloropyrimidine-5-carboxylic acid can undergo a chemical cross-linking reaction with the hydroxyl groups in the modified acrylic fibers and cotton fibers, enhancing the cross-linking between fibers and preventing fiber migration. Therefore, the anti-pilling properties, moisture absorption properties, washability, and antistatic properties of the composite fabric treated with the multifunctional finishing agent emulsion are improved. Attached Figure Description

[0021] Figure 1 This is a comparison chart of the heat retention rate tests of the anti-pilling and heat-insulating acrylic fabrics prepared in Examples 2-4 and Comparative Examples 3-7 of the present invention.

[0022] Figure 2 This is a comparison chart of the charge surface density (0 washes and 30 washes) of the anti-pilling and warm acrylic fabrics prepared in Examples 2-4 and Comparative Examples 3-7 of the present invention.

[0023] Figure 3 This is a comparison chart of the water absorption rate tests of the anti-pilling and warm acrylic fabrics prepared in Examples 2-4 and Comparative Examples 3-7 of the present invention. Detailed Implementation

[0024] The technical solutions of the present invention will be clearly and completely described below with reference to the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative effort are within the scope of protection of the present invention.

[0025] Example 1

[0026] This embodiment discloses a method for preparing silane-modified phase change microcapsules, including the following steps:

[0027] Step S1: Mix 12.5g of dihydroxy-terminated polydimethylsiloxane, 3g of isophorone diisocyanate, and 0.07g of dibutyltin dilaurate. React at 60°C for 3 hours under a nitrogen atmosphere. Then add 1.6g of 2-hydroxyethyl acrylate and 35g of n-butyl acetate, and continue the reaction for 3 hours. Remove the solvent by rotary evaporation at 70°C. Mix the resulting liquid product with hexane at a volume ratio of 1:2, centrifuge, let stand for 25 hours, remove the supernatant, and dry in a vacuum oven at 65°C for 21 hours to obtain silicone-modified polyurethane. Add 3.5g of nano-silicon carbide powder and 2g of silane coupling agent KH-570 to 115g of ethanol, sonicate for 30 minutes, then add 21.5g of deionized water. Adjust the pH of the mixture to 5 with oxalic acid, and stir at 60°C for 2 hours. After the reaction is complete, centrifuge... The obtained solid product was washed with deionized water and ethanol, and then vacuum dried at 50℃ for 25 h to obtain modified nano-silicon carbide. 0.3 g of organosilicon-modified polyurethane, 3 g of methyl methacrylate, 9 g of paraffin wax, 0.09 g of dodecyl mercaptan, 0.18 g of modified nano-silicon carbide, and 0.08 g of azobisisobutyronitrile were stirred at 65℃ for 15 min to obtain an oil phase. 0.3 g of sodium dodecyl sulfate, 0.15 g of octylphenol polyoxyethylene ether (OP-10), and 48 g of deionized water were mixed and stirred at 65℃ for 15 min to obtain an aqueous phase. The oil phase was added to the aqueous phase, and emulsified at 10000 rpm at 65℃ for 3 min, followed by reaction at 70℃ for 3 h. After the reaction, the mixture was cooled, demulsified with ethanol, centrifuged, and the resulting solid was washed with deionized water and dried at 53℃ for 13 h to obtain phase change microcapsules.

[0028] Step S2: Add 3g of phase change microcapsules to 125mL of Tris-HCl buffer solution with pH 8.5, sonicate for 30min, then add 0.3g of dopamine, stir at room temperature for 12h, centrifuge, wash the obtained solid with deionized water, and dry at room temperature to obtain polydopamine-modified phase change microcapsules; add 2g of silane coupling agent KH-550 to 100g of ethanol, then add 11g of polydopamine-modified phase change microcapsules, adjust the pH of the mixture to 8.8, reflux at 78℃ for 5h, collect the precipitate, wash and dry to obtain silane-modified phase change microcapsules.

[0029] Example 2

[0030] This embodiment discloses a method for preparing an anti-pilling and warm acrylic fabric, including the following steps:

[0031] Step 1: Preparation of modified acrylic fibers and polyurethane heat-generating and heat-insulating fibers; Acrylic fibers were immersed in a 9% (w / w) aqueous solution of 1,3-diamino-2-propanol at a bath ratio of 1:15, treated at 105℃ for 2 hours, then removed, squeezed, and washed 5 times with deionized water, and then vacuum dried at 50℃ to constant weight to obtain pretreated acrylic fibers; Silane-modified phase change microcapsules were added to ethanol and ultrasonically treated for 20 minutes to obtain a silane-modified phase change microcapsule dispersion with a concentration of 30 g / L; The pretreated acrylic fibers were added to the silane-modified phase change microcapsule dispersion, and then an 8.6% (w / w) glutaraldehyde / ethanol solution was added, reacted at 58℃ for 3.5 hours, leached, washed 5 times with deionized water, and then vacuum dried at 50℃ to constant weight to obtain modified acrylic fibers; The mass ratio of pretreated acrylic fibers, silane-modified phase change microcapsule dispersion, and glutaraldehyde / ethanol solution was 1:10:6; Polyurethane The particles were added to N,N-dimethylformamide and stirred for 12 h to obtain a 20% polyurethane solution. After degassing, the polyurethane solution was injected as a spinning solution into a coagulation bath composed of ethanol and water in a 6:4 volume ratio at an injection rate of 0.85 mL / min, a collection rate of 0.15 rad / s, and a coagulation bath temperature of 40 °C. The resulting fibers were dried at 70 °C for 6 h to obtain porous polyurethane fibers. The porous polyurethane fibers were immersed in a 0.6% polyvinyl alcohol aqueous solution for 3 min at a liquor ratio of 1:15, and then dried at 62 °C for 40 min to obtain polyvinyl alcohol-modified polyurethane fibers. The polyvinyl alcohol-modified polyurethane fibers were then soaked in a 5 g / L MXene aqueous dispersion for 15 min at a liquor ratio of 1:15, and dried at 62 °C for 40 min. This MXene aqueous dispersion soaking treatment was repeated three times to obtain polyurethane heat-generating and heat-insulating fibers.

[0032] Step 2: Blend modified acrylic fiber and cotton fiber at a 1:1 mass ratio to form a blended yarn with a count of 30S (English count), then knit it to obtain a weight of 100g / m². 2 The inner and outer fabrics; polyurethane heat-generating and warming fibers are spun and knitted to obtain a weight of 80g / m². 2 The middle layer fabric; the inner layer fabric, the middle layer fabric, and the outer layer fabric are bonded together to obtain a composite fabric;

[0033] Step 3: Mix 1.6g diallyldimethylammonium chloride, 1.5g mercaptoethylamine, and 50g methanol, stir for 20min, heat to 50℃, then add 0.02g azobisisobutyronitrile, stir and react for 5h. After the reaction is complete, evaporate the solvent to obtain the intermediate. Add 2.2g 2,4,6-trichloropyrimidine-5-carboxylic acid to 80g N,N-dimethylformamide, stir for 20min, then add 3g sulfoxide, heat to 40℃, and react for 3h. After the reaction is complete, raise the temperature to 90℃ to remove excess sulfoxide, then add 1.6g of the intermediate to the reaction system, react at 85℃ for 25h. After the reaction is complete, remove the solvent by rotary evaporation at 75℃. Wash the obtained product with deionized water and dry to obtain the multifunctional finishing agent. Mix 10g of the multifunctional finishing agent, 20g Span 20, and 30g Tween. Mix 80g of water evenly, then add 30g of water and stir evenly. Emulsify by ultrasonic dispersion for 30min to obtain a multifunctional finishing agent emulsion. Add the composite fabric to the multifunctional finishing agent emulsion at a liquor ratio of 1:25. Heat the fabric from 1℃ / min to 90℃ and immerse it for 40min. Remove the fabric and dry it to obtain an anti-pilling and warm acrylic fabric.

[0034] Example 3

[0035] This embodiment discloses a method for preparing an anti-pilling and warm acrylic fabric, including the following steps:

[0036] Step 1: Preparation of modified acrylic fibers and polyurethane heat-insulating fibers; Acrylic fibers were immersed in a 9% (w / w) aqueous solution of 1,3-diamino-2-propanol (1:25) at 115℃ for 1 hour, then removed, squeezed, and washed 8 times with deionized water, and then vacuum dried at 60℃ to constant weight to obtain pretreated acrylic fibers; Silane-modified phase change microcapsules were added to ethanol and ultrasonically treated for 40 minutes to obtain a silane-modified phase change microcapsule dispersion with a concentration of 40 g / L; The pretreated acrylic fibers were added to the silane-modified phase change microcapsule dispersion, and then an 8.6% (w / w) glutaraldehyde / ethanol solution was added, reacted at 62℃ for 2.5 hours, leached, washed 8 times with deionized water, and then vacuum dried at 60℃ to constant weight to obtain modified acrylic fibers; The mass ratio of pretreated acrylic fibers, silane-modified phase change microcapsule dispersion, and glutaraldehyde / ethanol solution was 1:15:9; Polyurethane... The particles were added to N,N-dimethylformamide and stirred for 15 h to obtain a 20% polyurethane solution. After degassing, the polyurethane solution was injected as a spinning solution into a coagulation bath composed of ethanol and water in a 7:3 volume ratio at an injection rate of 0.85 mL / min, a collection rate of 0.15 rad / s, and a coagulation bath temperature of 40 °C. The resulting fibers were dried at 80 °C for 4 h to obtain porous polyurethane fibers. The porous polyurethane fibers were immersed in a 0.6% polyvinyl alcohol aqueous solution for 5 min at a liquor ratio of 1:25, and then dried at 68 °C for 20 min to obtain polyvinyl alcohol-modified polyurethane fibers. The polyvinyl alcohol-modified polyurethane fibers were then soaked in a 7 g / L MXene aqueous dispersion for 25 min at a liquor ratio of 1:25, and dried at 68 °C for 20 min. This MXene aqueous dispersion soaking treatment was repeated 5 times to obtain polyurethane heat-generating and heat-insulating fibers.

[0037] Step 2: Blend modified acrylic fiber and cotton fiber at a 1:1 mass ratio to form a blended yarn with a count of 40S (English count), then knit it to obtain a weight of 120g / m². 2 The inner and outer fabrics; polyurethane heat-generating and warming fibers are spun and knitted to obtain a weight of 100g / m². 2 The middle layer fabric; the inner layer fabric, the middle layer fabric, and the outer layer fabric are bonded together to obtain a composite fabric;

[0038] Step 3: Mix 3.2g diallyldimethylammonium chloride, 3g mercaptoethylamine, and 80g methanol, stir for 40min, heat to 55℃, then add 0.03g azobisisobutyronitrile, stir and react for 4h. After the reaction is complete, evaporate the solvent to obtain the intermediate. Add 4.4g 2,4,6-trichloropyrimidine-5-carboxylic acid to 100g N,N-dimethylformamide, stir for 40min, then add 5g sulfoxide, heat to 60℃, and react for 1h. After the reaction is complete, raise the temperature to 90℃ to remove excess sulfoxide, then add 3.2g of the intermediate to the reaction system, react at 95℃ for 20h. After the reaction is complete, remove the solvent by rotary evaporation at 80℃. Wash the obtained product with deionized water and dry to obtain the multifunctional finishing agent. Mix 20g of the multifunctional finishing agent, 20g of Span 20, and 30g of Tween. Mix 80g of water evenly, then add 40g of water and stir evenly. Emulsify by ultrasonic dispersion for 40min to obtain a multifunctional finishing agent emulsion. Add the composite fabric to the multifunctional finishing agent emulsion at a liquor ratio of 1:35. Heat the fabric from 2℃ / min to 95℃ and immerse it for 50min. Remove the fabric and dry it to obtain an anti-pilling and warm acrylic fabric.

[0039] Example 4

[0040] This embodiment discloses a method for preparing an anti-pilling and warm acrylic fabric, including the following steps:

[0041] Step 1: Preparation of modified acrylic fibers and polyurethane heat-generating and heat-insulating fibers; Acrylic fibers were immersed in a 9% (w / w) aqueous solution of 1,3-diamino-2-propanol at a bath ratio of 1:20, treated at 110℃ for 1.5 h, then removed, squeezed, and washed 7 times with deionized water, and then vacuum dried at 55℃ to constant weight to obtain pretreated acrylic fibers; Silane-modified phase change microcapsules were added to ethanol and ultrasonically treated for 30 min to obtain a concentration of 35 g / L. Silane-modified phase change microcapsule dispersion; pretreated acrylic fibers were added to the silane-modified phase change microcapsule dispersion, followed by the addition of an 8.6% (w / w) glutaraldehyde / ethanol solution. The mixture was reacted at 60°C for 3 hours, leached, washed 7 times with deionized water, and then vacuum dried at 55°C to constant weight to obtain modified acrylic fibers; wherein the mass ratio of pretreated acrylic fibers, silane-modified phase change microcapsule dispersion, and glutaraldehyde / ethanol solution was 1:12.5:7.5; polyurethane... The particles were added to N,N-dimethylformamide and stirred for 13 hours to obtain a 20% polyurethane solution. After degassing, the polyurethane solution was injected as a spinning solution into a coagulation bath composed of ethanol and water in a volume ratio of 6.5:3.5 at an injection rate of 0.85 mL / min and a collection rate of 0.15 rad / s. The temperature of the coagulation bath was 40℃. The resulting fibers were dried at 75℃ for 5 hours to obtain porous polyurethane fibers. The porous polyurethane fibers were immersed in a 0.6% polyvinyl alcohol aqueous solution for 4 minutes at a liquor ratio of 1:20, and then dried at 65℃ for 30 minutes to obtain polyvinyl alcohol-modified polyurethane fibers. The polyvinyl alcohol-modified polyurethane fibers were then soaked in a 6 g / L MXene aqueous dispersion for 20 minutes at a liquor ratio of 1:20, and dried at 65℃ for 30 minutes. This MXene aqueous dispersion soaking treatment was repeated four times to obtain polyurethane heat-generating and heat-insulating fibers.

[0042] Step 2: Blend modified acrylic fiber and cotton fiber at a 1:1 mass ratio to form a blended yarn with a count of 35S (English count), then knit it to obtain a weight of 110 g / m². 2 The inner and outer fabrics; polyurethane heat-generating and warming fibers are spun and knitted to obtain a weight of 90g / m². 2 The middle layer fabric; the inner layer fabric, the middle layer fabric, and the outer layer fabric are bonded together to obtain a composite fabric;

[0043] Step 3: Mix 2.4g diallyldimethylammonium chloride, 2.3g mercaptoethylamine, and 65g methanol, stir for 30 min, heat to 52℃, then add 0.03g azobisisobutyronitrile, stir and react for 4.5 h. After the reaction is complete, evaporate the solvent to obtain the intermediate. Add 3.3g 2,4,6-trichloropyrimidine-5-carboxylic acid to 90g N,N-dimethylformamide, stir for 30 min, then add 4g sulfoxide, heat to 50℃, and react for 2 h. After the reaction is complete, raise the temperature to 90℃ to remove excess sulfoxide, then add 2.4g of the intermediate to the reaction system, react at 90℃ for 22 h. After the reaction is complete, remove the solvent by rotary evaporation at 77℃. Wash the obtained product with deionized water and dry to obtain the multifunctional finishing agent. Mix 15g of the multifunctional finishing agent, 20g Span 20, and 30g Tween. Mix 80g of water evenly, then add 35g of water and stir evenly. Emulsify by ultrasonic dispersion for 35min to obtain a multifunctional finishing agent emulsion. Add the composite fabric to the multifunctional finishing agent emulsion at a liquor ratio of 1:30. Heat the fabric at a rate of 1.5℃ / min to 92.5℃ and immerse it for 45min. Remove the fabric and dry it to obtain an anti-pilling and warm acrylic fabric.

[0044] The silane-modified phase change microcapsules in Examples 2-4 above are the silane-modified phase change microcapsules prepared in Example 1.

[0045] Comparative Example 1

[0046] This comparative example discloses a method for preparing silane-modified phase change microcapsules, including the following steps:

[0047] Step S1: Mix 12.5g of dihydroxy-terminated polydimethylsiloxane, 3g of isophorone diisocyanate, and 0.07g of dibutyltin dilaurate. React at 60°C for 3 hours under a nitrogen atmosphere. Then add 1.6g of 2-hydroxyethyl acrylate and 35g of n-butyl acetate, and continue the reaction for 3 hours. Remove the solvent by rotary evaporation at 70°C. Mix the resulting liquid product with hexane at a volume ratio of 1:2, centrifuge, let stand for 25 hours, remove the supernatant, and dry in a vacuum oven at 65°C for 21 hours to obtain silicone-modified polyurethane. Add 3.5g of nano-silicon carbide powder and 2g of silane coupling agent KH-570 to 115g of ethanol, sonicate for 30 minutes, then add 21.5g of deionized water. Adjust the pH of the mixture to 5 with oxalic acid, and then stir at 60°C for 2 hours. After the reaction was completed, the product was centrifuged, washed with deionized water and ethanol, and then vacuum dried at 50°C for 25 h to obtain modified nano-silicon carbide. 0.3 g of organosilicon-modified polyurethane, 3 g of methyl methacrylate, 9 g of paraffin wax, 0.09 g of dodecyl mercaptan, and 0.08 g of azobisisobutyronitrile were stirred at 65°C for 15 min to obtain an oil phase. 0.3 g of sodium dodecyl sulfate, 0.15 g of octylphenol polyoxyethylene ether (OP-10), and 48 g of deionized water were mixed and stirred at 65°C for 15 min to obtain an aqueous phase. The oil phase was added to the aqueous phase, and emulsified at 10000 rpm at 65°C for 3 min, followed by reaction at 70°C for 3 h. After the reaction was completed, the mixture was cooled, demulsified with ethanol, centrifuged, and the resulting solid was washed with deionized water and dried at 53°C for 13 h to obtain phase change microcapsules.

[0048] Step S2: Add 3g of phase change microcapsules to 125mL of Tris-HCl buffer solution with pH 8.5, sonicate for 30min, then add 0.3g of dopamine, stir at room temperature for 12h, centrifuge, wash the obtained solid with deionized water, and dry at room temperature to obtain polydopamine-modified phase change microcapsules; add 2g of silane coupling agent KH-550 to 100g of ethanol, then add 11g of polydopamine-modified phase change microcapsules, adjust the pH of the mixture to 8.8, reflux at 78℃ for 5h, collect the precipitate, wash and dry to obtain silane-modified phase change microcapsules.

[0049] Comparative Example 2

[0050] This comparative example discloses a method for preparing silane-modified phase change microcapsules, including the following steps:

[0051] Step S1: Mix 12.5g of dihydroxy-terminated polydimethylsiloxane, 3g of isophorone diisocyanate, and 0.07g of dibutyltin dilaurate. React at 60°C for 3 hours under a nitrogen atmosphere. Then add 1.6g of 2-hydroxyethyl acrylate and 35g of n-butyl acetate, and continue the reaction for 3 hours. Remove the solvent by rotary evaporation at 70°C. Mix the resulting liquid product with hexane at a volume ratio of 1:2, centrifuge, let stand for 25 hours, remove the supernatant, and dry in a vacuum oven at 65°C for 21 hours to obtain silicone-modified polyurethane. Add 3.5g of nano-silicon carbide powder and 2g of silane coupling agent KH-570 to 115g of ethanol, sonicate for 30 minutes, then add 21.5g of deionized water. Adjust the pH of the mixture to 5 with oxalic acid, and stir at 60°C for 2 hours. After the reaction is complete, centrifuge... The obtained solid product was washed with deionized water and ethanol, and then vacuum dried at 50℃ for 25 h to obtain modified nano-silicon carbide. 0.3 g of organosilicon-modified polyurethane, 3 g of methyl methacrylate, 9 g of paraffin wax, 0.09 g of dodecyl mercaptan, 0.18 g of modified nano-silicon carbide, and 0.08 g of azobisisobutyronitrile were stirred at 65℃ for 15 min to obtain an oil phase. 0.3 g of sodium dodecyl sulfate, 0.15 g of octylphenol polyoxyethylene ether (OP-10), and 48 g of deionized water were mixed and stirred at 65℃ for 15 min to obtain an aqueous phase. The oil phase was added to the aqueous phase, and emulsified at 10000 rpm at 65℃ for 3 min, followed by reaction at 70℃ for 3 h. After the reaction, the mixture was cooled, demulsified with ethanol, centrifuged, and the resulting solid was washed with deionized water and dried at 53℃ for 13 h to obtain phase change microcapsules.

[0052] Step S2: Add 2g of silane coupling agent KH-550 to 100g of ethanol, then add 11g of phase change microcapsules, adjust the pH of the mixture to 8.8, reflux at 78℃ for 5h, collect the precipitate, wash and dry it to obtain silane-modified phase change microcapsules.

[0053] Comparative Example 3

[0054] Compared with Example 4, Comparative Example 3 used the silane-modified phase change microcapsules prepared in Comparative Example 1 in the process of preparing modified acrylic fibers, while other conditions remained unchanged.

[0055] Comparative Example 4

[0056] Compared with Example 4, Comparative Example 4 used the silane-modified phase change microcapsules prepared in Comparative Example 2 in the process of preparing modified acrylic fibers, while other conditions remained unchanged.

[0057] Comparative Example 5

[0058] Compared with Example 4, Comparative Example 5 used porous polyurethane fibers instead of polyvinyl alcohol modified polyurethane fibers in the process of preparing polyurethane heating and heat-insulating fibers, while keeping other conditions unchanged.

[0059] Comparative Example 6

[0060] Compared with Example 4, Comparative Example 6 used polyvinyl alcohol modified polyurethane fiber instead of polyurethane heating and heat-insulating fiber in the process of preparing polyurethane heating and heat-insulating fiber. That is, no MXene was deposited on the polyurethane heating and heat-insulating fiber in this comparative example, and other conditions remained unchanged.

[0061] Comparative Example 7

[0062] Compared with Example 4, in the process of preparing the anti-pilling and warm acrylic fabric, the composite fabric in Comparative Example 7 was not impregnated with the multifunctional finishing agent emulsion. That is, the composite fabric in this comparative example is the final product - the anti-pilling and warm acrylic fabric, and all other conditions remain unchanged.

[0063] In the above examples and comparative examples, the dihydroxy-terminated polydimethylsiloxane, with a molecular weight of 2000, was sourced from Hubei Yamed Biomedical Co., Ltd.; paraffin wax, model TH-SL-23, with a phase transition temperature of 23℃ and a storage density of 220 g / J, was sourced from Suzhou Kangzhilv Technology Co., Ltd.; Tris-HCl buffer solution, with a concentration of 0.01 mol / L and a pH of 8.5, was sourced from Shanghai Yuanye Biotechnology Co., Ltd.; acrylic fiber, made from short-cut polyacrylonitrile filaments, with an average length of 38 mm and an average particle size of 1 μm, was sourced from Zhangjiagang Free Trade Zone Rimeda Fiber Trading Co., Ltd.; polyurethane particles, brand Bayer (Germany), grade 1180A, with a density of 1.1 g / cm3, were sourced from Foshan Ruisheng Plastics Co., Ltd.; polyvinyl alcohol, model 1799, was sourced from Jinan Xiangfeng Weiye Chemical Co., Ltd.; MXene, model ZK-Ti3C2TX, was sourced from Zhongke Leiming (Beijing) Technology Co., Ltd.; Span 20 (model S-20) and Tween... 80 (model Tween series emulsifier T-80), octylphenol polyoxyethylene ether (OP-10), both came from Haian Petrochemical Plant in Jiangsu Province; nano silicon carbide powder, with an average particle size of 40nm, came from Wuhan Kemike Biomedical Technology Co., Ltd.

[0064] Experimental Example

[0065] The performance of the anti-pilling and warm acrylic fabrics prepared in Examples 2-4 and Comparative Examples 3-7 was tested.

[0066] I. Antistatic property test: The test shall be conducted in accordance with GB / T12703.2-2021 "Textiles - Test methods for electrostatic properties - Part 2: Surface charge density".

[0067] II. Thermal Insulation Test: The test shall be conducted in accordance with the plate method of GB / T35762-2017.

[0068] III. Anti-pilling performance test: Tested according to GB / T4802.1-2008 Textiles - Pilling Test - Circular Trajectory Method.

[0069] IV. Moisture absorption test: The test shall be conducted in accordance with GB / T21655.1-2023 "Evaluation of moisture absorption and quick-drying properties of textiles - Part 1: Single combination test method".

[0070] The test results are shown in Table 1:

[0071]

[0072] As shown in Table 1, the anti-pilling and warm acrylic fabrics prepared in Examples 2-4 of this invention exhibit excellent washability, anti-pilling properties, warmth retention, moisture absorption, and antistatic properties. A comparison between Comparative Example 3 and Example 4 reveals that the nano-silicon carbide in the silane-modified phase change microcapsules on the surface of the modified acrylic fibers, due to its excellent thermal conductivity, electrical conductivity, and solar energy absorption, improves the fabric's warmth retention and antistatic properties. A comparison between Comparative Example 4 and Example 4 shows that the introduction of the polydopamine layer in the silane-modified phase change microcapsules on the surface of the modified acrylic fibers enhances the fabric's warmth retention, moisture absorption, and antistatic properties. A comparison between Comparative Example 5 and Example 4 shows that the presence of polyvinyl alcohol in the polyurethane heat-generating and warming fiber improves the fiber's hydrophilic moisture absorption and antistatic properties, and also strengthens the bond between MXene and the fiber. The strength of the composite material is improved, thereby enhancing the fabric's washability, warmth retention, moisture absorption, and antistatic properties. A comparison between Comparative Example 6 and Example 4 shows that the presence of MXene in the polyurethane heat-generating and warming fiber has a positive impact on the fabric's warmth retention, moisture absorption, and antistatic properties. A comparison between Comparative Example 7 and Example 4 shows that the quaternary ammonium salt structure in the multifunctional finishing agent has hydrophilic, moisture-absorbing, and antistatic properties, while the chlorine in 2,4,6-trichloropyrimidine-5-carboxylic acid can undergo a cross-linking reaction with the hydroxyl groups in the modified acrylic fiber and cotton fiber, preventing fiber movement and improving the fabric's washability, anti-pilling properties, moisture absorption, and antistatic properties.

[0073] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A method for preparing an anti-pilling, warm acrylic fabric, characterized in that, Includes the following steps: Step 1: Preparation of modified acrylic fibers; The method for preparing the modified acrylic fiber includes: the acrylic fiber is pretreated with 1,3-diamino-2-propanol, and then loaded with silane-modified phase change microcapsules to obtain the modified acrylic fiber. The silane-modified phase change microcapsules are prepared by the following method: Step S1: Prepare organosilicon-modified polyurethane and modified nano-silicon carbide; use methyl methacrylate as shell material, organosilicon-modified polyurethane as shell material crosslinking agent, modified nano-silicon carbide as shell material modifier, and paraffin as phase change core material to prepare phase change microcapsules. Step S2: The phase change microcapsules are modified sequentially with polydopamine and silane coupling agent KH-550 to obtain silane-modified phase change microcapsules. Step 2: Modified acrylic fiber is blended with cotton fiber to form a blended yarn, which is then knitted to obtain the inner and outer fabrics; polyurethane heat-generating and warming fiber is spun and knitted to obtain the middle layer fabric; the inner, middle, and outer fabrics are then laminated to obtain the composite fabric. The preparation method of the polyurethane heat-generating and heat-insulating fiber specifically includes: A 20% polyurethane solution was degassed and injected as a spinning solution into a coagulation bath composed of ethanol and water in a volume ratio of (6-7):(3-4). The injection rate was 0.85 mL / min, the collection rate was 0.15 rad / s, the temperature of the coagulation bath was 40℃, and the solution was dried to obtain porous polyurethane fibers. Porous polyurethane fibers are immersed in a 0.6% (w / w) polyvinyl alcohol aqueous solution for 3-5 minutes at a bath ratio of 1:(15-25), and then dried at 62-68℃ for 20-40 minutes to obtain polyvinyl alcohol modified polyurethane fibers. Polyvinyl alcohol modified polyurethane fiber was soaked in MXene aqueous dispersion with a concentration of 5-7 g / L for 15-25 min at a bath ratio of 1:(15-25), dried at 62-68℃ for 20-40 min, and the soaking treatment was repeated 3-5 times to obtain polyurethane heat-generating and heat-insulating fiber. Step 3: Diallyl dimethylammonium chloride and mercaptoethylamine react to obtain an intermediate; 2,4,6-trichloropyrimidine-5-carboxylic acid reacts sequentially with thionyl chloride and the intermediate to obtain a multifunctional finishing agent; the multifunctional finishing agent is mixed with Span 20, Tween 80, and water, and emulsified to obtain a multifunctional finishing agent emulsion; The composite fabric is impregnated in a multifunctional finishing agent emulsion to obtain an anti-pilling and warm acrylic fabric.

2. The method for preparing anti-pilling and warm acrylic fabric according to claim 1, characterized in that, In step one, the method for preparing the modified acrylic fiber specifically includes: Acrylic fibers are immersed in a 9% (w / w) aqueous solution of 1,3-diamino-2-propanol at a bath ratio of 1:(15-25) at 105-115℃ for 1-2 hours. After immersion, the fibers are removed, squeezed, washed, and dried to obtain pretreated acrylic fibers. Pretreated acrylic fibers were added to a silane-modified phase change microcapsule dispersion, followed by the addition of a glutaraldehyde / ethanol solution. The mixture was reacted at 58-62℃ for 2.5-3.5 hours, then leached, washed, and dried to obtain modified acrylic fibers. The mass ratio of the pretreated acrylic fibers, the silane-modified phase change microcapsule dispersion, and the glutaraldehyde / ethanol solution was 1:(10-15):(6-9).

3. The method for preparing anti-pilling and warm acrylic fabric according to claim 1, characterized in that, In step S1, the preparation methods of organosilicon-modified polyurethane and modified nano-silicon carbide specifically include: Dihydroxy-terminated polydimethylsiloxane, isophorone diisocyanate, and dibutyltin dilaurate were mixed and reacted at 58-62℃ for 2.5-3.5 h under a nitrogen atmosphere. Then, 2-hydroxyethyl acrylate and n-butyl acetate were added, and the reaction was continued for another 2.5-3.5 h. After purification, organosilicon-modified polyurethane was obtained. The mass ratio of dihydroxy-terminated polydimethylsiloxane, isophorone diisocyanate, dibutyltin dilaurate, 2-hydroxyethyl acrylate, and n-butyl acetate was (10-15):(2.3-3.5):(0.06-0.09):(1.3-1.9):(30-40). Nano-silicon carbide powder, silane coupling agent KH-570, ethanol, and deionized water were mixed in a mass ratio of (2-5):(1-3):(80-150):(15-28), the pH was adjusted to 5, and the mixture was stirred at 58-62℃ for 1.5-2.5 h. After purification, modified nano-silicon carbide was obtained.

4. The method for preparing the anti-pilling and warm acrylic fabric according to claim 1, characterized in that, The preparation method of phase change microcapsules in step S1 specifically includes: Sodium dodecyl sulfate, octylphenol polyoxyethylene ether, and deionized water were mixed in a mass ratio of (0.2-0.4):(0.1-0.2):(32-64) and stirred at 63-68℃ for 10-20 min to obtain an aqueous phase. Organosilicon-modified polyurethane, methyl methacrylate, paraffin wax, dodecyl mercaptan, modified nano-silicon carbide, and azobisisobutyronitrile were mixed in a mass ratio of (0.2-0.4):(2-4):(6-12):(0.06-0.12):(0.16-0.2):(0.05-0.1) and stirred at 63-68℃ for 10-20 min to obtain an oil phase. The oil phase was added to the aqueous phase and emulsified at 63-68℃ at a speed of 9000-11000 rpm for 2-4 min, and then reacted at 68-72℃ for 2.5-3.5 h to obtain phase change microcapsules.

5. The method for preparing anti-pilling and warm acrylic fabric according to claim 1, characterized in that, In step S2, the preparation method of silane-modified phase change microcapsules specifically includes: Phase change microcapsules were added to Tris-HCl buffer, followed by dopamine. The mixture was stirred at room temperature for 10-14 hours to obtain polydopamine-modified phase change microcapsules. The ratio of phase change microcapsules, Tris-HCl buffer, and dopamine was (2-4) g: (100-150) mL: (0.2-0.4) g. Silane coupling agent KH-550, ethanol, and polydopamine-modified phase change microcapsules were mixed in a mass ratio of (1-3):(80-120):(10-12), the pH was adjusted to 8.5-9, and the mixture was refluxed at 75-80℃ for 4-6 hours to obtain silane-modified phase change microcapsules.

6. The method for preparing anti-pilling and warm acrylic fabric according to claim 1, characterized in that, In step two, the weight of the intermediate layer fabric is 80-100 g / m². 2 The weight of the inner and outer fabrics is 100-120 g / m². 2 The blended yarn has a count of 30-40S, and the mass ratio of modified acrylic fiber to cotton fiber is 1:

1.

7. The method for preparing anti-pilling and warm acrylic fabric according to claim 1, characterized in that, In step three, the preparation method of the multifunctional finishing agent emulsion specifically includes: Diallyl dimethyl ammonium chloride, mercaptoethylamine, and methanol were mixed, stirred, and heated to 50-55°C. Then, azobisisobutyronitrile was added, and the mixture was stirred and reacted for 4-5 hours to obtain an intermediate. The mass ratio of diallyl dimethyl ammonium chloride, mercaptoethylamine, methanol, and azobisisobutyronitrile was (1.6-3.2):(1.5-3):(50-80):(0.02-0.03). 2,4,6-Trichloropyrimidine-5-carboxylic acid was added to N,N-dimethylformamide and stirred. Then, sulfoxide was added and heated to 40-60℃ for 1-3 hours. The temperature was then raised to 90℃, and an intermediate was added. The mixture was reacted at 85-95℃ for 20-25 hours and purified to obtain a multifunctional finishing agent. The mass ratio of 2,4,6-trichloropyrimidine-5-carboxylic acid, N,N-dimethylformamide, sulfoxide, and the intermediate was (2.2-4.4):(80-100):(3-5):(1.6-3.2). Mix the multifunctional finishing agent, Span 20 and Tween 80, and water in a mass ratio of (10-20):20:30:(30-40), and emulsify for 30-40 minutes to obtain the multifunctional finishing agent emulsion.

8. The method for preparing anti-pilling and warm acrylic fabric according to claim 1, characterized in that, In step three, the bath ratio of the composite fabric to the multifunctional finishing agent emulsion is 1:(25-35); the immersion treatment conditions are: heating to 90-95℃ at a heating rate of 1-2℃ / min, and immersion treatment for 40-50min.

9. An anti-pilling and warm acrylic fabric prepared by the method for preparing anti-pilling and warm acrylic fabric as described in any one of claims 1-8.

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