Anti-wrinkle and antibacterial cotton-polyester blended composite fabric and preparation method thereof

Abstract

The invention discloses an anti-wrinkle and antibacterial cotton-polyester blended composite fabric and a preparation method thereof, and relates to the field of blended fabric preparation, and the preparation method comprises the following steps: modifying cotton fibers and polyester filament fibers, and soaking and treating a core-spun yarn matrix by using a matrix treating fluid. According to the method, the core-spun yarn base body is soaked and treated by using the base body treating fluid with the fluffy structural body, so that the bottom conical point nodes of the fluffy structural body are respectively combined with the first connecting site and the second connecting site; the fluffy structural body can effectively absorb and disperse deformation stress of the fabric, then wrinkles are avoided, when external force disappears, resilience force of the fluffy structural body assists the fabric to restore to the original state, and therefore the anti-wrinkle performance of the fabric is improved, and the fabric is comfortable to wear. Meanwhile, the two adjacent modified fibers are kept in a relatively stable position state under connection of the fluffy structural body, deformation stress can be effectively reduced, and then the wrinkle resistance of the fabric is improved.

Description

Technical Field

[0001] The invention relates to the technical field of blended fabrics, in particular to a wrinkle-resistant and antibacterial cotton-polyester blended composite fabric and a preparation method thereof. Background Art

[0002] As people's living standards improve and their material lives become more affluent, they place greater demands on the safety, health, comfort, and environmental friendliness of textiles. Among numerous textiles, cotton fabrics are widely used in the production of undergarments due to their moisture and heat absorption, good breathability, and softness and comfort. However, current cotton fabrics are not only prone to dirt and bacterial growth after prolonged use, posing certain health risks to the human body, but are also prone to wrinkling, resulting in a shorter service life and causing inconvenience in daily use. Therefore, a wrinkle-resistant and antibacterial cotton-polyester blended composite fabric is proposed to address these issues.

[0003] The defects of existing fabrics are:

[0004] 1. Patent document CN114318872B mainly considers how to improve the warmth retention of cotton fabrics, but does not consider how to improve the wrinkle resistance of fabrics;

[0005] 2. Patent document CN113308889B mainly considers how to improve the flame retardant effect of fabrics, but does not consider how to improve the antibacterial effect of cotton fabrics. Summary of the Invention

[0006] The object of the present invention is to provide a wrinkle-resistant and antibacterial cotton-polyester blended composite fabric and a preparation method thereof, so as to solve the problems raised in the above background technology.

[0007] To achieve the above object, the present invention provides the following technical solution: a method for preparing a wrinkle-resistant and antibacterial cotton-polyester blended composite fabric, comprising the following steps:

[0008] S1. Modifying the cotton fiber and the polyester filament fiber respectively to obtain a modified cotton fiber containing a first connection site, which is recorded as a first outer fiber;

[0009] A modified polyester filament fiber containing a second connection site is obtained and recorded as a second outer fiber;

[0010] S2, taking T400 elastic fiber as the core, and wrapping the first outer covering fiber and the second outer covering fiber side by side on the outside of the T400 elastic fiber to form a core-spun yarn matrix;

[0011] S3, preparing a matrix treatment liquid containing a fluffy structure, wherein the fluffy structure is a triangular pyramid structure;

[0012] S4, immersing the core-spun yarn substrate in a substrate treatment solution for immersion treatment, and obtaining the wrinkle-resistant and antibacterial yarn after washing and drying;

[0013] S5. The anti-wrinkle and antibacterial yarns are used as warp and weft threads respectively, and the warp and weft threads are interwoven using a twill weaving method to obtain a cotton-polyester blended composite fabric.

[0014] Preferably, the acquisition of the modified cotton fiber comprises the following steps:

[0015] The cotton fibers are surface activated using an activation solution, and the soaking conditions are 55-65° C. for 20-30 minutes. After soaking, the fibers are taken out, washed, and dried.

[0016] Prepare a first treatment liquid, soak the cotton fibers after surface activation treatment in the first treatment liquid for soaking treatment, and the soaking conditions are 15-25° C., soaking for 20-30 minutes, taking out after soaking, repeatedly washing with deionized water until neutral, and drying;

[0017] The acquisition of modified cotton fiber also includes soaking the cotton fiber after soaking in the first treatment liquid in a cross-linking treatment liquid for a first connection site fixation treatment, and the cross-linking treatment liquid includes PVA, glutaraldehyde and deionized water, and the weight percentage of PVA in the cross-linking treatment liquid is 0.5% to 2%, and the weight percentage of glutaraldehyde is 0.1% to 0.4%. After taking out, the cotton fiber is dried at 80 to 100°C.

[0018] Preferably, the raw materials and mass ratio in the activation solution are sodium carbonate: surfactant: deionized water (5-10): 1:100;

[0019] The first treatment solution includes TEMPO, NaBr, NaClO and distilled water, and the volume ratio of TEMPO, NaBr, NaClO and distilled water is (1-2): (10-12): 1:90;

[0020] The method of using the first treatment solution to activate the surface of the cotton fibers further comprises using sodium hydroxide to adjust the pH of the first treatment solution to 9.5-10.5.

[0021] Preferably, obtaining the modified polyester filament comprises the following steps:

[0022] The polyester filament fiber is surface pretreated using a sodium hydroxide aqueous solution, and the surface pretreatment conditions are as follows: soaking at 80-90°C for 15-30 minutes, taking out after soaking, washing and drying;

[0023] A second treatment liquid is obtained by mixing anhydrous ethanol, water and 3-aminopropyltriethoxysilane, and the pH of the second treatment liquid is adjusted to 4.5-6 using an acidic solution;

[0024] Soaking the surface pretreated polyester filament fiber in the second treatment solution at 35-90° C. for 15-30 minutes;

[0025] After the soaking is completed, the polyester filament fiber is washed 3 to 5 times with ethanol and deionized water, and then dried to obtain the modified polyester filament fiber containing the second connection site.

[0026] Preferably, the concentration of sodium hydroxide in the sodium hydroxide aqueous solution is 1% to 3%, and the bath ratio of the sodium hydroxide aqueous solution to the polyester filament fiber is 9:1;

[0027] The volume ratio of anhydrous ethanol: water: 3-aminopropyltriethoxysilane in the second treatment liquid is 90: (9-15): (1-3);

[0028] The acidic solution is acetic acid or dilute hydrochloric acid.

[0029] Preferably, the mass ratio of the T400 elastic fiber, the first outer covering fiber, and the second outer covering fiber in the core-spun yarn matrix is 1:2:2.

[0030] Preferably, the fluffy structure is a triangular pyramid structure, which includes a nano-skeleton and a cone point group;

[0031] The preparation method of the triangular pyramid structure comprises the following steps: dissolving TMP in an anhydrous N,N-dimethylformamide solvent, adding phosphorus oxychloride, and stirring at low temperature to obtain a nano-skeleton buffer solution, wherein the nano-skeleton includes four groups of cone point nodes;

[0032] Add hydrazinoacetic acid, NHS, EDC and phosphate buffer solution to the nanoskeleton buffer solution at 0-10°C, react at 20-25°C for 90-100 minutes, then add NHS-PEG-COOH, react at pH 7.2-8.0 for 40-60 minutes to obtain an intermediate solution;

[0033] The intermediate solution is mixed with anhydrous ethanol, and then mercaptoethanol, NHS and EDC are added, and the pH value of the mixed solution is adjusted to 6.5-7.0, and the mixture is reacted at 20-25° C. for 40-60 minutes to obtain a post-treatment solution;

[0034] A silver nitrate aqueous solution is added to the post-treatment solution under a light-shielding condition of 0-5° C., mixed evenly, and then a sodium borohydride solution is added to obtain a fluffy structure buffer solution containing a fluffy structure.

[0035] Preferably, the preparation of the matrix treatment liquid containing the fluffy structure comprises: adding polyvinyl alcohol to deionized water and mixing uniformly to obtain a matrix solution;

[0036] A fluffy structure buffer solution is added to the base solution, and the fluffy structure is evenly dispersed in the base solution using ultrasonic dispersion technology. Then, a cross-linking agent, chitosan and glycerol are added, and after uniform mixing, glacial acetic acid buffer is added to adjust the pH value of the base solution containing the fluffy structure to 5.0-5.5 to obtain a base treatment solution.

[0037] Preferably, the acquisition of the anti-wrinkle and antibacterial yarn includes wetting the core-spun yarn substrate with warm water before soaking the core-spun yarn substrate with the substrate treatment liquid, then taking out the wetted core-spun yarn substrate and immersing it in the substrate treatment liquid, soaking it for 5 to 20 minutes at a bath ratio of 10:1 and a temperature of 30 to 40°C. After the soaking treatment is completed, the soaked core-spun yarn substrate is taken out and allowed to stand for 5 to 10 minutes, and then dried to obtain the anti-wrinkle and antibacterial yarn.

[0038] A wrinkle-resistant and antibacterial cotton-polyester blended composite fabric is prepared by using a method for preparing a wrinkle-resistant and antibacterial cotton-polyester blended composite fabric.

[0039] Compared with the prior art, the present invention has the following beneficial effects:

[0040] 1. The present invention modifies cotton fiber and polyester filament fiber to obtain a first outer fiber with an aldehyde group as a first connection site and a second outer fiber with an amino group as a second connection site, and uses the first outer fiber and the second outer fiber to prepare a core-spun yarn matrix in parallel, and then uses a matrix treatment liquid with a fluffy structure to immerse the core-spun yarn matrix, so that the bottom cone point nodes of the fluffy structure are respectively combined with the first connection site and the second connection site, and then the fluffy structure is attached to the outside of the core-spun yarn matrix, so that when the cotton-polyester blended yarn is subjected to external forces such as folding and rubbing that cause wrinkles in the fabric, the fluffy structure can effectively absorb and disperse the deformation stress of the fabric, reduce and evenly distribute the deformation stress in the fabric, and thus avoid the formation of wrinkles. When the external force disappears, the fabric is helped to return to its original state through the resilience of the fluffy structure, thereby improving the wrinkle resistance of the fabric.

[0041] 2. The present invention utilizes a fluffy structure combined with a core-spun yarn matrix so that the bottom cone point nodes of a group of fluffy structures are respectively combined with the first connection site outside the adjacent first outer fiber and the second connection site outside the second outer fiber, so that the two adjacent modified fibers maintain a relatively stable position state under the connection of the fluffy structure, which can effectively reduce the generation of deformation stress and thereby improve the wrinkle resistance of the fabric.

[0042] 3. The present invention performs a cross-linking and qualitative treatment on the modified cotton fiber, which is beneficial to maintaining the orientation of the first connection site, thereby improving the connection effect between the first outer fiber and the fluffy structure, and at the same time is beneficial to improving the shrinkage rate of the cotton fiber. The parallel preheating and shaping treatment of the first outer fiber and the second outer fiber is beneficial to making the shrinkage of the modified cotton fiber consistent with that of the polyester filament fiber, reducing the shrinkage difference between different fibers in the cotton-polyester blended composite fabric, and thereby reducing the deformation or wrinkling of the fabric.

[0043] 4. The present invention connects and grafts nano-silver ions at the top cone point node of the fluffy structure, and as the fluffy structure fixes the nano-silver ions outward on the outside of the core-spun yarn matrix, an anti-wrinkle and antibacterial yarn is obtained, which effectively improves the antibacterial effect of cotton-polyester blended fabrics. DETAILED DESCRIPTION

[0044] The following will be combined with the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0045] A wrinkle-resistant and antibacterial cotton-polyester blended composite fabric is prepared by a method for preparing a wrinkle-resistant and antibacterial cotton-polyester blended composite fabric according to the following steps. The method for preparing a wrinkle-resistant and antibacterial cotton-polyester blended composite fabric is as follows:

[0046] S1. Modifying the cotton fiber and the polyester filament fiber respectively to obtain a modified cotton fiber containing a first connection site, which is recorded as a first outer fiber;

[0047] A modified polyester filament fiber containing a second connection site is obtained and recorded as a second outer fiber;

[0048] S2, taking T400 elastic fiber as the core, and wrapping the first outer covering fiber and the second outer covering fiber side by side on the outside of the T400 elastic fiber to form a core-spun yarn matrix;

[0049] S3, preparing a matrix treatment liquid containing a fluffy structure, wherein the fluffy structure is a triangular pyramid structure;

[0050] S4, immersing the core-spun yarn substrate in a substrate treatment solution for immersion treatment, and obtaining the wrinkle-resistant and antibacterial yarn after washing and drying;

[0051] S5. The anti-wrinkle and antibacterial yarns are used as warp and weft threads respectively, and the warp and weft threads are interwoven using a twill weaving method to obtain a cotton-polyester blended composite fabric.

[0052] Example 1:

[0053] A wrinkle-resistant and antibacterial cotton-polyester blended fabric and a preparation method thereof, comprising the following steps:

[0054] S1. Modifying the cotton fiber and the polyester filament fiber respectively to obtain a modified cotton fiber containing a first connection site, which is recorded as a first outer fiber;

[0055] A modified polyester filament fiber containing a second connection site is obtained and recorded as a second outer fiber;

[0056] The acquisition of modified cotton fiber comprises the following steps:

[0057] The cotton fibers were surface activated using an activation solution, and the soaking conditions were 60°C for 25 minutes. After soaking, the fibers were taken out, washed, and dried.

[0058] The raw materials and their mass ratio in the activation solution are sodium carbonate: surfactant: deionized water at 8:1:100, and the surfactant is Tween 80. By using the activation solution to perform surface activation treatment on the cotton fiber, impurities and wax on the cotton fiber surface are easily removed, thereby exposing the hydroxyl groups on the cotton fiber surface, thereby providing a basic site for the establishment of the first connection site.

[0059] Prepare a first treatment liquid, soak the cotton fiber after the surface activation treatment in the first treatment liquid for soaking treatment, and the soaking conditions are at 20°C for 25 minutes. After soaking, take out, wash repeatedly with deionized water until neutral, and dry, and the bath ratio of cotton fiber to first treatment liquid is 1:80;

[0060] The first treatment solution includes TEMPO, NaBr, NaClO and distilled water, and the volume ratio of TEMPO, NaBr, NaClO and distilled water is 1.5:12:1:90;

[0061] Using the first treatment solution to activate the cotton fibers after surface treatment also includes adjusting the pH of the first treatment solution to 9.5 using sodium hydroxide;

[0062] The modified cotton fiber further comprises soaking the cotton fiber in a cross-linking treatment solution after soaking in the first treatment solution to fix the first connection site, wherein the cross-linking treatment solution includes PVA, glutaraldehyde and deionized water, and the weight percentage of PVA in the cross-linking treatment solution is 1% and the weight percentage of glutaraldehyde is 0.3%, and then drying the cotton fiber at 100°C.

[0063] The preparation of modified polyester filament includes the following steps:

[0064] The polyester filament fibers are surface pretreated using a sodium hydroxide aqueous solution, and the surface pretreatment conditions are as follows: soaking at 85° C. for 20 minutes, taking out, washing, and drying after soaking. The sodium hydroxide concentration in the sodium hydroxide aqueous solution is 2%, and the bath ratio of the sodium hydroxide aqueous solution to the polyester filament fibers is 9:1. The hydrolysis treatment of the polyester filament fibers is beneficial to improving the hydrophilicity of the polyester filament fibers.

[0065] A second treatment liquid is prepared by mixing anhydrous ethanol, water, and 3-aminopropyltriethoxysilane, and the pH of the second treatment liquid is adjusted to 5.0 using an acidic solution, wherein the volume ratio of anhydrous ethanol:water:3-aminopropyltriethoxysilane is 90:10:1, and the acidic solution is acetic acid;

[0066] The surface pretreated polyester filament fibers were immersed in the second treatment solution at 40° C. for 30 minutes;

[0067] After the soaking is completed, the polyester filament fiber is washed four times with ethanol and deionized water, and dried to obtain a modified polyester filament fiber containing a second connection site;

[0068] For the first outer covering fiber and the second outer covering fiber, the first outer covering fiber and the second outer covering fiber are placed side by side, and then preheated and set at 140°C and a tension setting of 1.6 times to ensure that the first outer covering fiber and the second outer covering fiber maintain similar deformation trends;

[0069] S2. Take T400 elastic fiber as the core, wrap the first outer covering fiber and the second outer covering fiber side by side on the outside of the T400 elastic fiber to form a core-spun yarn matrix, wrap the first outer covering fiber and the second outer covering fiber after residual heat setting treatment on the outside of the core fiber yarn, and the mass ratio of T400 elastic fiber, first outer covering fiber, and second outer covering fiber in the core-spun yarn matrix is 1:2:2;

[0070] S3, preparing a matrix treatment liquid containing a fluffy structure, wherein the fluffy structure is a triangular pyramid structure;

[0071] S4, immersing the core-spun yarn substrate in a substrate treatment solution for immersion treatment, and obtaining the wrinkle-resistant and antibacterial yarn after washing and drying;

[0072] Among them, the fluffy structure is a triangular pyramid structure, which includes a nano-skeleton and a cone point group;

[0073] The preparation method of the triangular pyramid structure includes the following steps: dissolving TMP in anhydrous N,N-dimethylformamide solvent, adding phosphorus oxychloride, and stirring at 3°C to obtain a nano-skeleton buffer solution, wherein the nano-skeleton includes four groups of cone nodes, wherein the molar ratio of TMP: anhydrous N,N-dimethylformamide solvent: phosphorus oxychloride is 1:10:0.6;

[0074] Adding hydrazinoacetic acid, NHS, EDC, and phosphate buffer solution to the nanoskeleton buffer at 3°C with a molar ratio of hydrazinoacetic acid:TMP of 2:1 and a molar ratio of hydrazinoacetic acid:NHS:EDC of 1:1.1:1.1, and reacting at 25°C for 95 minutes to modify two of the four groups of cone nodes of the nanoskeleton at the bottom. Then, adding NHS-PEG-COOH with a molar ratio of NHS-PEG-COOH:TMP of 1:1, and adjusting the pH of the solution to 7.5, and reacting for 50 minutes to obtain an intermediate solution, and modifying the other group of the four groups of cone nodes of the nanoskeleton at the bottom.

[0075] The intermediate solution was mixed with anhydrous ethanol at a volume ratio of 10:1, and then mercaptoethanol, NHS, and EDC were added, with a molar ratio of TMP: mercaptoethanol: NHS: EDC of 2:1:1:1. The pH value of the mixed solution was adjusted to 6.5, and the mixture was reacted at 20-25° C. for 50 minutes to obtain a post-treatment solution.

[0076] A silver nitrate aqueous solution was added to the post-treatment solution under shading conditions at 3° C., and after mixing evenly, a sodium borohydride solution was added to obtain a fluffy structure buffer solution containing a fluffy structure, wherein the molar ratio of mercaptoethanol: silver nitrate aqueous solution and sodium borohydride solution was 1:2:10.

[0077] The preparation of the matrix treatment liquid containing the fluffy structure includes: adding polyvinyl alcohol to deionized water and mixing uniformly until the polyvinyl alcohol is completely dissolved to obtain a matrix solution, wherein the mass ratio of deionized water to polyvinyl alcohol in the matrix solution is 45:1;

[0078] A fluffy structure buffer solution was added to the base solution, and the fluffy structure was uniformly dispersed in the base solution using ultrasonic dispersion technology. A cross-linking agent, chitosan, and glycerol were then added and mixed. After uniform mixing, a glacial acetic acid buffer was added to adjust the pH value of the base solution containing the fluffy structure to 5 to obtain a base treatment solution. The volume ratio of the base solution to the fluffy structure buffer solution was 16:1, and the mass ratio of chitosan:glycerol:cross-linker:PVA was 4:0.5:0.2:1. The cross-linking agent was glutaraldehyde.

[0079] S4, immersing the core-spun yarn substrate in the substrate treatment liquid for immersion treatment, and obtaining the anti-wrinkle and antibacterial yarn after washing and drying. Before the core-spun yarn substrate is soaked, the core-spun yarn substrate is moistened with warm water for 4 minutes, and then the moistened core-spun yarn substrate is taken out and immersed in the substrate treatment liquid at a bath ratio of 10:1 and a temperature of 35°C for 10 minutes. After the soaking treatment, the soaked core-spun yarn substrate is taken out and allowed to stand for 7 minutes, and then dried at 80°C to obtain the anti-wrinkle and antibacterial yarn;

[0080] S5. The anti-wrinkle and antibacterial yarns are used as warp and weft threads respectively, and the warp and weft threads are interwoven using a twill weaving method to obtain a cotton-polyester blended composite fabric.

[0081] Example 2:

[0082] A wrinkle-resistant and antibacterial cotton-polyester blended fabric and a preparation method thereof, comprising the following steps:

[0083] S1. Modifying the cotton fiber and the polyester filament fiber respectively to obtain a modified cotton fiber containing a first connection site, which is recorded as a first outer fiber;

[0084] A modified polyester filament fiber containing a second connection site is obtained and recorded as a second outer fiber;

[0085] The acquisition of modified cotton fiber comprises the following steps:

[0086] The cotton fibers were surface activated using an activation solution, and the soaking conditions were 60°C for 25 minutes. After soaking, the fibers were taken out, washed, and dried.

[0087] The raw materials and their mass ratio in the activation solution are sodium carbonate: surfactant: deionized water at 8:1:100, and the surfactant is Tween 80;

[0088] Prepare a first treatment liquid, soak the cotton fiber after surface activation treatment in the first treatment liquid for soaking treatment, and the soaking conditions are at 20°C for 30 minutes. After soaking, take out the cotton fiber, wash it repeatedly with deionized water until it is neutral, and dry it. The bath ratio of the cotton fiber to the first treatment liquid is 1:80;

[0089] The first treatment solution includes TEMPO, NaBr, NaClO and distilled water, and the volume ratio of TEMPO, NaBr, NaClO and distilled water is 1:10:1:90;

[0090] Using the first treatment solution to activate the cotton fibers after surface treatment also includes adjusting the pH of the first treatment solution to 9.5 using sodium hydroxide;

[0091] The modified cotton fiber further comprises soaking the cotton fiber in a cross-linking treatment solution after soaking in the first treatment solution to fix the first connection site, wherein the cross-linking treatment solution includes PVA, glutaraldehyde and deionized water, and the weight percentage of PVA in the cross-linking treatment solution is 1% and the weight percentage of glutaraldehyde is 0.3%, and then drying the cotton fiber at 100°C.

[0092] The preparation of modified polyester filament includes the following steps:

[0093] The polyester filament fiber is surface pretreated using a sodium hydroxide aqueous solution, and the surface pretreatment conditions are as follows: immersing at 85° C. for 20 minutes, taking out after immersion, washing and drying, wherein the sodium hydroxide concentration in the sodium hydroxide aqueous solution is 2%, and the bath ratio of the sodium hydroxide aqueous solution to the polyester filament fiber is 9:1;

[0094] A second treatment liquid is prepared by mixing anhydrous ethanol, water, and 3-aminopropyltriethoxysilane, and the pH of the second treatment liquid is adjusted to 5.0 using an acidic solution, wherein the volume ratio of anhydrous ethanol:water:3-aminopropyltriethoxysilane is 90:10:1, and the acidic solution is acetic acid;

[0095] The surface pretreated polyester filament fibers were immersed in the second treatment solution at 40° C. for 30 minutes;

[0096] After the soaking is completed, the polyester filament fiber is washed four times with ethanol and deionized water, and dried to obtain a modified polyester filament fiber containing a second connection site;

[0097] For the first outer covering fiber and the second outer covering fiber, the first outer covering fiber and the second outer covering fiber are placed side by side, and then preheated and set at 140°C and a tension setting of 1.6 times to ensure that the first outer covering fiber and the second outer covering fiber maintain similar deformation trends;

[0098] S2. Take T400 elastic fiber as the core, wrap the first outer covering fiber and the second outer covering fiber side by side on the outside of the T400 elastic fiber to form a core-spun yarn matrix, wrap the first outer covering fiber and the second outer covering fiber after residual heat setting treatment on the outside of the core fiber yarn, and the mass ratio of T400 elastic fiber, first outer covering fiber, and second outer covering fiber in the core-spun yarn matrix is 1:2:2;

[0099] S3, preparing a matrix treatment liquid containing a fluffy structure, wherein the fluffy structure is a triangular pyramid structure;

[0100] S4, immersing the core-spun yarn substrate in a substrate treatment solution for immersion treatment, and obtaining the wrinkle-resistant and antibacterial yarn after washing and drying;

[0101] Among them, the fluffy structure is a triangular pyramid structure, which includes a nano-skeleton and a cone point group;

[0102] The preparation method of the triangular pyramid structure includes the following steps: dissolving TMP in anhydrous N,N-dimethylformamide solvent, adding phosphorus oxychloride, and stirring at 3°C to obtain a nano-skeleton buffer solution, wherein the nano-skeleton includes four groups of cone nodes, wherein the molar ratio of TMP: anhydrous N,N-dimethylformamide solvent: phosphorus oxychloride is 1:10:0.6;

[0103] Adding hydrazinoacetic acid, NHS, EDC, and phosphate buffer solution to the nanoskeleton buffer at 3°C with a molar ratio of hydrazinoacetic acid:TMP of 2:1 and a molar ratio of hydrazinoacetic acid:NHS:EDC of 1:1.1:1.1, and reacting at 25°C for 95 minutes to modify two of the four groups of cone nodes of the nanoskeleton at the bottom. Then, adding NHS-PEG-COOH with a molar ratio of NHS-PEG-COOH:TMP of 1:1, and adjusting the pH of the solution to 7.5, and reacting for 50 minutes to obtain an intermediate solution, and modifying the other group of the four groups of cone nodes of the nanoskeleton at the bottom.

[0104] The intermediate solution was mixed with anhydrous ethanol at a volume ratio of 10:1, and then mercaptoethanol, NHS, and EDC were added, with a molar ratio of TMP: mercaptoethanol: NHS: EDC of 2:1:1:1. The pH value of the mixed solution was adjusted to 6.5, and the mixture was reacted at 20-25° C. for 50 minutes to obtain a post-treatment solution.

[0105] A silver nitrate aqueous solution was added to the post-treatment solution under shading conditions at 3° C., and after mixing evenly, a sodium borohydride solution was added to obtain a fluffy structure buffer solution containing a fluffy structure, wherein the molar ratio of mercaptoethanol: silver nitrate aqueous solution and sodium borohydride solution was 1:2:10.

[0106] The preparation of the matrix treatment liquid containing the fluffy structure includes: adding polyvinyl alcohol to deionized water and mixing uniformly until the polyvinyl alcohol is completely dissolved to obtain a matrix solution, wherein the mass ratio of deionized water to polyvinyl alcohol in the matrix solution is 45:1;

[0107] A fluffy structure buffer solution was added to the base solution, and the fluffy structure was uniformly dispersed in the base solution using ultrasonic dispersion technology. A cross-linking agent, chitosan, and glycerol were then added and mixed. After uniform mixing, a glacial acetic acid buffer was added to adjust the pH value of the base solution containing the fluffy structure to 5 to obtain a base treatment solution. The volume ratio of the base solution to the fluffy structure buffer solution was 16:1, and the mass ratio of chitosan:glycerol:cross-linker:PVA was 4:0.5:0.2:1. The cross-linking agent was glutaraldehyde.

[0108] S4, immersing the core-spun yarn substrate in the substrate treatment liquid for immersion treatment, and obtaining the anti-wrinkle and antibacterial yarn after washing and drying. Before the core-spun yarn substrate is soaked, the core-spun yarn substrate is moistened with warm water for 4 minutes, and then the moistened core-spun yarn substrate is taken out and immersed in the substrate treatment liquid at a bath ratio of 10:1 and a temperature of 35°C for 10 minutes. After the soaking treatment, the soaked core-spun yarn substrate is taken out and allowed to stand for 7 minutes, and then dried at 80°C to obtain the anti-wrinkle and antibacterial yarn;

[0109] S5. The anti-wrinkle and antibacterial yarns are used as warp and weft threads respectively, and the warp and weft threads are interwoven using a twill weaving method to obtain a cotton-polyester blended composite fabric.

[0110] Example 3:

[0111] A wrinkle-resistant and antibacterial cotton-polyester blended fabric and a preparation method thereof, comprising the following steps:

[0112] S1. Modifying the cotton fiber and the polyester filament fiber respectively to obtain a modified cotton fiber containing a first connection site, which is recorded as a first outer fiber;

[0113] A modified polyester filament fiber containing a second connection site is obtained and recorded as a second outer fiber;

[0114] The acquisition of modified cotton fiber comprises the following steps:

[0115] The cotton fibers were surface activated using an activation solution, and the soaking conditions were 60°C for 25 minutes. After soaking, the fibers were taken out, washed, and dried.

[0116] The raw materials and their mass ratio in the activation solution are sodium carbonate: surfactant: deionized water at 8:1:100, and the surfactant is Tween 80;

[0117] Prepare a first treatment liquid, soak the cotton fiber after the surface activation treatment in the first treatment liquid for soaking treatment, and the soaking conditions are at 20°C for 25 minutes. After soaking, take out, wash repeatedly with deionized water until neutral, and dry, and the bath ratio of cotton fiber to first treatment liquid is 1:80;

[0118] The first treatment solution includes TEMPO, NaBr, NaClO and distilled water, and the volume ratio of TEMPO, NaBr, NaClO and distilled water is 1.5:12:1:90;

[0119] Using the first treatment solution to activate the cotton fibers after surface treatment also includes adjusting the pH of the first treatment solution to 9.5 using sodium hydroxide;

[0120] The modified cotton fiber further comprises soaking the cotton fiber in a cross-linking treatment solution after soaking in the first treatment solution to fix the first connection site, wherein the cross-linking treatment solution includes PVA, glutaraldehyde and deionized water, and the weight percentage of PVA in the cross-linking treatment solution is 1% and the weight percentage of glutaraldehyde is 0.3%, and then drying the cotton fiber at 100°C.

[0121] The preparation of modified polyester filament includes the following steps:

[0122] The polyester filament fiber is surface pretreated using a sodium hydroxide aqueous solution, and the surface pretreatment conditions are as follows: immersing at 85° C. for 20 minutes, taking out after immersion, washing and drying, wherein the sodium hydroxide concentration in the sodium hydroxide aqueous solution is 2%, and the bath ratio of the sodium hydroxide aqueous solution to the polyester filament fiber is 9:1;

[0123] A second treatment liquid is prepared by mixing anhydrous ethanol, water, and 3-aminopropyltriethoxysilane, and the pH of the second treatment liquid is adjusted to 5.0 using an acidic solution, wherein the volume ratio of anhydrous ethanol:water:3-aminopropyltriethoxysilane is 90:10:1, and the acidic solution is acetic acid;

[0124] The surface pretreated polyester filament fibers were immersed in the second treatment solution at 40° C. for 30 minutes;

[0125] After the soaking is completed, the polyester filament fiber is washed four times with ethanol and deionized water, and dried to obtain a modified polyester filament fiber containing a second connection site;

[0126] For the first outer covering fiber and the second outer covering fiber, the first outer covering fiber and the second outer covering fiber are placed side by side, and then preheated and set at 140°C and a tension setting of 1.6 times to ensure that the first outer covering fiber and the second outer covering fiber maintain similar deformation trends;

[0127] S2. Take T400 elastic fiber as the core, wrap the first outer covering fiber and the second outer covering fiber side by side on the outside of the T400 elastic fiber to form a core-spun yarn matrix, wrap the first outer covering fiber and the second outer covering fiber after residual heat setting treatment on the outside of the core fiber yarn, and the mass ratio of T400 elastic fiber, first outer covering fiber, and second outer covering fiber in the core-spun yarn matrix is 1:2:2;

[0128] S3, preparing a matrix treatment liquid containing a fluffy structure, wherein the fluffy structure is a triangular pyramid structure;

[0129] S4, immersing the core-spun yarn substrate in a substrate treatment solution for immersion treatment, and obtaining the wrinkle-resistant and antibacterial yarn after washing and drying;

[0130] Among them, the fluffy structure is a triangular pyramid structure, which includes a nano-skeleton and a cone point group;

[0131] The preparation method of the triangular pyramid structure includes the following steps: dissolving TMP in anhydrous N,N-dimethylformamide solvent, adding phosphorus oxychloride, and stirring at 3°C to obtain a nano-skeleton buffer solution, wherein the nano-skeleton includes four groups of cone nodes, wherein the molar ratio of TMP: anhydrous N,N-dimethylformamide solvent: phosphorus oxychloride is 1:10:0.6;

[0132] Adding hydrazinoacetic acid, NHS, EDC, and phosphate buffer solution to the nanoskeleton buffer at 3°C with a molar ratio of hydrazinoacetic acid:TMP of 2:1 and a molar ratio of hydrazinoacetic acid:NHS:EDC of 1:1.1:1.1, and reacting at 25°C for 95 minutes to modify two of the four groups of cone nodes of the nanoskeleton at the bottom. Then, adding NHS-PEG-COOH with a molar ratio of NHS-PEG-COOH:TMP of 2:1 and adjusting the pH of the solution to 7.5, and reacting for 50 minutes to obtain an intermediate solution, and modifying the other group of the four groups of cone nodes of the nanoskeleton at the bottom.

[0133] The intermediate solution was mixed with anhydrous ethanol at a volume ratio of 10:1, and then mercaptoethanol, NHS, and EDC were added, with a molar ratio of TMP: mercaptoethanol: NHS: EDC of 2:1:1:1. The pH value of the mixed solution was adjusted to 6.5, and the mixture was reacted at 20-25° C. for 50 minutes to obtain a post-treatment solution.

[0134] A silver nitrate aqueous solution was added to the post-treatment solution under shading conditions at 3° C., and after mixing evenly, a sodium borohydride solution was added to obtain a fluffy structure buffer solution containing a fluffy structure, wherein the molar ratio of mercaptoethanol: silver nitrate aqueous solution and sodium borohydride solution was 1:2:10.

[0135] The preparation of the matrix treatment liquid containing the fluffy structure includes: adding polyvinyl alcohol to deionized water and mixing uniformly until the polyvinyl alcohol is completely dissolved to obtain a matrix solution, wherein the mass ratio of deionized water to polyvinyl alcohol in the matrix solution is 45:1;

[0136] A fluffy structure buffer solution was added to the base solution, and the fluffy structure was uniformly dispersed in the base solution using ultrasonic dispersion technology. A cross-linking agent, chitosan, and glycerol were then added and mixed. After uniform mixing, a glacial acetic acid buffer was added to adjust the pH value of the base solution containing the fluffy structure to 5 to obtain a base treatment solution. The volume ratio of the base solution to the fluffy structure buffer solution was 16:1, and the mass ratio of chitosan:glycerol:cross-linker:PVA was 4:0.5:0.2:1. The cross-linking agent was glutaraldehyde.

[0137] S4, immersing the core-spun yarn substrate in the substrate treatment liquid for immersion treatment, and obtaining the anti-wrinkle and antibacterial yarn after washing and drying. Before the core-spun yarn substrate is soaked, the core-spun yarn substrate is moistened with warm water for 4 minutes, and then the moistened core-spun yarn substrate is taken out and immersed in the substrate treatment liquid at a bath ratio of 10:1 and a temperature of 35°C for 10 minutes. After the soaking treatment, the soaked core-spun yarn substrate is taken out and allowed to stand for 7 minutes, and then dried at 80°C to obtain the anti-wrinkle and antibacterial yarn;

[0138] S5. The anti-wrinkle and antibacterial yarns are used as warp and weft threads respectively, and the warp and weft threads are interwoven using a twill weaving method to obtain a cotton-polyester blended composite fabric.

[0139] Comparative Example 1:

[0140] The difference between this embodiment and embodiment 1 is that, in this embodiment, after the cotton fibers are soaked in the first treatment liquid, the modified cotton fibers are not subjected to a cross-linking treatment liquid for cross-linking and setting treatment, and before the first and second outer covering fibers are used to cover the T400 elastic fibers in parallel, the first and second outer covering fibers are not subjected to a parallel preheating and setting treatment.

[0141] Comparative Example 2:

[0142] The difference between this embodiment and comparative document 1 is that the cotton fiber and polyester filament fiber are not modified and the core-spun yarn matrix is not soaked with a matrix treatment liquid;

[0143] Comparative Example 3:

[0144] The difference between this embodiment and the comparative document 1 is that when preparing the matrix treatment liquid containing the fluffy structure, only the bottom cone point node is modified, and the top cone point node is not modified;

[0145] Comparative Example 4:

[0146] The difference between this embodiment and comparative example 2 is that the cotton fiber and polyester filament fiber in comparative document 2 are blended in parallel to obtain textile yarn, and then the yarn is interwoven as warp and weft to obtain a cotton-polyester blended composite fabric.

[0147] Performance Testing

[0148] The cotton-polyester blended composite fabrics prepared in Examples 1-4 were tested for antibacterial and anti-wrinkle properties. The antibacterial performance test was carried out according to the GB / T20944.3-2008 standard. The test bacteria were Gram-negative bacteria - Escherichia coli (AATCC29522), Gram-positive bacteria - Staphylococcus aureus (AATCC6538), and the percentage of mold coverage on the surface of the composite fabric was measured according to GB / T 24346-2009 "Evaluation of Antifungal Properties of Textiles". The anti-wrinkle performance was measured by folding recovery angle according to GB / T3819-1997 standard, and the standard folding angle was 180° during the test. The test results are shown in the following table:

[0149]

[0150] It can be seen from the above experimental data that, from Example 1 and Comparative Example 2, it can be seen that by modifying the cotton fiber and the polyester filament fiber, an aldehyde group for connecting the cone point node at the bottom of the fluffy structure is generated on the outside of the cotton fiber as the first connection site, and an amino group for connecting the cone point node at the bottom of the fluffy structure is generated on the outside of the polyester filament fiber as the second connection site, and the core-spun yarn matrix formed by the first outer fiber and the second outer fiber wrapped core yarn arranged in parallel is immersed in the matrix treatment liquid, and the fluffy structure of the hollow three-dimensional structure is connected at the first connection site and the second connection site, so that when the cotton-polyester blended yarn is subjected to folding, rubbing, etc., which causes wrinkles in the fabric, When an external force is applied to the fabric to prevent wrinkles, it can effectively absorb and disperse the deformation stress of the fabric, reduce and evenly distribute the deformation stress in the fabric, thereby avoiding the formation of wrinkles, and when the external force disappears, the resilience of the fluffy structure helps the fabric to return to its original state, thereby improving the wrinkle resistance of the fabric, and the bottom cone points of a group of fluffy structures are respectively connected to the first connection site on the adjacent modified cotton fiber and the second connection site on the modified polyester fiber, so that the two adjacent modified fibers maintain a relatively stable position state under the connection of the fluffy structure, which can effectively reduce the generation of deformation stress and thus improve the wrinkle resistance of the fabric; It can be seen from Examples 1 and 2 that by regulating the modified properties of the cotton fibers The process makes the outside of the modified cotton fiber have enough first connection sites, which can effectively combine with the fluffy structure in the matrix treatment liquid, so that the wrinkle resistance of the cotton-polyester blended composite fabric is effectively improved. By comparing Example 1 and Comparative Example 1, it can be seen that by cross-linking and qualitatively treating the modified cotton fiber, it is beneficial to maintain the orientation of the first connection site, thereby improving the connection effect between the first outer fiber and the fluffy structure, and at the same time, it is beneficial to improve the shrinkage rate of the cotton fiber, and the parallel preheating and shaping treatment of the first outer fiber and the second outer fiber is beneficial to keep the shrinkage of the modified cotton fiber consistent with that of the polyester filament fiber, thereby reducing the shrinkage of different fibers in the cotton-polyester blended composite fabric. difference, thereby reducing the deformation or wrinkling of the fabric; according to the experimental data of Comparative Examples 2 and 4, it can be seen that by using T400 elastic fiber as the core fiber and combining the first outer yarn and the second outer yarn to prepare the core-spun structure yarn, it is beneficial to improve the elasticity of the core-spun structure yarn and enhance the self-recovery ability of the composite fabric, thereby helping to improve the anti-wrinkle performance of the composite fabric. It can be seen from the experimental data of Examples 1-3 and Comparative Example 3 that by connecting the grafted nano-silver ions at the top cone point node of the fluffy structure, and as the fluffy structure fixes the nano-silver ions outward on the outside of the core-spun yarn matrix, the wrinkle-resistant and antibacterial yarn is obtained, which effectively improves the antibacterial effect of the cotton-polyester blended fabric.

[0151] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above and that the invention can be embodied in other specific forms without departing from the spirit or essential characteristics of the invention. Therefore, the embodiments should be considered in all respects as illustrative and non-restrictive, and the scope of the invention is defined by the appended claims rather than the foregoing description, and it is intended that all variations that come within the meaning and range of equivalents of the claims be embraced therein.

Claims

1. A method for preparing a wrinkle-resistant and antibacterial cotton-polyester blended composite fabric, characterized by: The following steps are involved: S1. Modifying the cotton fiber and the polyester filament fiber respectively to obtain a modified cotton fiber containing a first connection site, which is recorded as a first outer fiber; A modified polyester filament fiber containing a second connection site is obtained and recorded as a second outer fiber; S2, taking T400 elastic fiber as the core, and wrapping the first outer covering fiber and the second outer covering fiber side by side on the outside of the T400 elastic fiber to form a core-spun yarn matrix; S3, preparing a matrix treatment liquid containing a fluffy structure, wherein the fluffy structure is a triangular pyramid structure; S4, immersing the core-spun yarn substrate in a substrate treatment solution for immersion treatment, and obtaining the wrinkle-resistant and antibacterial yarn after washing and drying; S5. The anti-wrinkle and antibacterial yarns are used as warp and weft threads respectively, and the warp and weft threads are interwoven using a twill weaving method to obtain a cotton-polyester blended composite fabric.

2. The method for preparing a wrinkle-resistant and antibacterial cotton-polyester blended composite fabric according to claim 1, characterized in that: The acquisition of the modified cotton fiber comprises the following steps: The cotton fibers are surface activated using an activation solution, and the soaking conditions are 55-65° C. for 20-30 minutes. After soaking, the fibers are taken out, washed, and dried. Prepare a first treatment liquid, soak the cotton fibers after surface activation treatment in the first treatment liquid for soaking treatment, and the soaking conditions are 15-25° C., soaking for 20-30 minutes, taking out after soaking, repeatedly washing with deionized water until neutral, and drying; The acquisition of modified cotton fiber also includes soaking the cotton fiber after soaking in the first treatment liquid in a cross-linking treatment liquid for a first connection site fixation treatment, and the cross-linking treatment liquid includes PVA, glutaraldehyde and deionized water, and the weight percentage of PVA in the cross-linking treatment liquid is 0.5% to 2%, and the weight percentage of glutaraldehyde is 0.1% to 0.4%. After taking out, the cotton fiber is dried at 80 to 100°C.

3. The method for preparing a wrinkle-resistant and antibacterial cotton-polyester blended composite fabric according to claim 2, characterized in that: The raw materials and mass ratio in the activation solution are sodium carbonate: surfactant: deionized water (5-10): 1:100; The first treatment solution includes TEMPO, NaBr, NaClO and distilled water, and the volume ratio of TEMPO, NaBr, NaClO and distilled water is (1-2): (10-12): 1:90; The method of using the first treatment solution to activate the surface of the cotton fibers further comprises using sodium hydroxide to adjust the pH of the first treatment solution to 9.5-10.

5.

4. The method for preparing a wrinkle-resistant and antibacterial cotton-polyester blended composite fabric according to claim 1, characterized in that: The acquisition of the modified polyester filament comprises the following steps: The polyester filament fiber is surface pretreated using a sodium hydroxide aqueous solution, and the surface pretreatment conditions are as follows: soaking at 80-90°C for 15-30 minutes, taking out after soaking, washing and drying; A second treatment liquid is obtained by mixing anhydrous ethanol, water and 3-aminopropyltriethoxysilane, and the pH of the second treatment liquid is adjusted to 4.5-6 using an acidic solution; Soaking the surface pretreated polyester filament fiber in the second treatment solution at 35-90° C. for 15-30 minutes; After the soaking is completed, the polyester filament fiber is washed 3 to 5 times with ethanol and deionized water, and then dried to obtain the modified polyester filament fiber containing the second connection site.

5. The method for preparing a wrinkle-resistant and antibacterial cotton-polyester blended composite fabric according to claim 4, characterized in that: The sodium hydroxide concentration in the sodium hydroxide aqueous solution is 1% to 3%, and the bath ratio of the sodium hydroxide aqueous solution to the polyester filament fiber is 9:1; The volume ratio of anhydrous ethanol: water: 3-aminopropyltriethoxysilane in the second treatment liquid is 90: (9-15): (1-3); The acidic solution is acetic acid or dilute hydrochloric acid.

6. The method for preparing a wrinkle-resistant and antibacterial cotton-polyester blended composite fabric according to claim 1, characterized in that: The mass ratio of the T400 elastic fiber, the first outer covering fiber, and the second outer covering fiber in the core-spun yarn matrix is 1:2:

2.

7. The method for preparing a wrinkle-resistant and antibacterial cotton-polyester blended composite fabric according to claim 1, characterized in that: The fluffy structure is a triangular pyramid structure, which includes a nano-skeleton and a cone point group; The preparation method of the triangular pyramid structure comprises the following steps: dissolving TMP in an anhydrous N,N-dimethylformamide solvent, adding phosphorus oxychloride, and stirring at low temperature to obtain a nano-skeleton buffer solution, wherein the nano-skeleton includes four groups of cone point nodes; Add hydrazinoacetic acid, NHS, EDC and phosphate buffer solution to the nanoskeleton buffer solution at 0-10°C, react at 20-25°C for 90-100 minutes, then add NHS-PEG-COOH, react at pH 7.2-8.0 for 40-60 minutes to obtain an intermediate solution; The intermediate solution is mixed with anhydrous ethanol, and then mercaptoethanol, NHS and EDC are added, and the pH value of the mixed solution is adjusted to 6.5-7.0, and the mixture is reacted at 20-25° C. for 40-60 minutes to obtain a post-treatment solution; A silver nitrate aqueous solution is added to the post-treatment solution under a light-shielding condition of 0-5° C., mixed evenly, and then a sodium borohydride solution is added to obtain a fluffy structure buffer solution containing a fluffy structure.

8. The method for preparing a wrinkle-resistant and antibacterial cotton-polyester blended composite fabric according to claim 7, characterized in that: The preparation of the matrix treatment liquid containing the fluffy structure comprises: adding polyvinyl alcohol to deionized water and mixing uniformly to obtain a matrix solution; A fluffy structure buffer solution is added to the base solution, and the fluffy structure is evenly dispersed in the base solution using ultrasonic dispersion technology. Then, a cross-linking agent, chitosan and glycerol are added, and after uniform mixing, glacial acetic acid buffer is added to adjust the pH value of the base solution containing the fluffy structure to 5.0-5.5 to obtain a base treatment solution.

9. The method for preparing a wrinkle-resistant and antibacterial cotton-polyester blended composite fabric according to claim 8, characterized in that: The preparation of the anti-wrinkle and antibacterial yarn includes wetting the core-spun yarn substrate with warm water before soaking the core-spun yarn substrate in a substrate treatment liquid, then taking out the wetted core-spun yarn substrate and immersing it in the substrate treatment liquid, soaking it for 5 to 20 minutes at a bath ratio of 10:1 and a temperature of 30 to 40°C, taking out the soaked core-spun yarn substrate after the soaking treatment, and letting it stand for 5 to 10 minutes, and then drying it to obtain the anti-wrinkle and antibacterial yarn.

10. A wrinkle-resistant and antibacterial cotton-polyester blended composite fabric. The anti-wrinkle and antibacterial cotton-polyester blended composite fabric is prepared according to the method for preparing the anti-wrinkle and antibacterial cotton-polyester blended composite fabric according to claim 9.

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