Moisture-absorption composite crease-resistant fabric based on China-hemp and preparation method

Abstract

The invention relates to the technical field of layered composite fabrics, and discloses a moisture absorption composite crease-resistant fabric based on China-hemp and a preparation method thereof. The preparation method comprises the following steps: activating the China-hemp / cotton blended yarn, performing antibacterial finishing to obtain the antibacterial modified China-hemp / cotton blended yarn, weaving the antibacterial modified China-hemp / cotton blended yarn and the pure cotton fiber yarn, padding the obtained single-layer fabric in an anti-wrinkle finishing liquid, and laminating and compounding to obtain the moisture absorption composite anti-wrinkle fabric based on the China-hemp. The fabric is antibacterial, good in moisture absorption effect and good in crease-resistant effect.

Description

Technical Field

[0001] The present invention relates to the technical field of laminated composite fabrics, and particularly to a hemp moisture-absorbing composite anti-wrinkle fabric and a preparation method thereof. Background Art

[0002] Although hemp fibers have unique functions such as natural antibacterial, bacteriostatic, moisture-absorbing and cool, anti-ultraviolet, etc., there are problems such as rough hand feeling, easy to wrinkle, easy to pill, and difficult to care, especially after washing, the fabric surface has serious wrinkles and extremely unstable dimensions, which limits the application.

[0003] The anti-wrinkle finishing of fabrics mainly includes the resin deposition theory and the covalent cross-linking theory. Among them, covalent finishing agents generally have two or more reactive groups, enabling the finishing agent to form covalent cross-links with the fabric, connecting the fiber molecular chains, enabling the fibers to quickly recover from the deformed state, and achieving the purpose of reducing wrinkle generation; the resin deposition theory refers to that after baking, the finishing agent forms a network structure inside the fiber or between the fiber macromolecular chains, hindering the deformation and movement of the fiber molecular chains, thereby improving the recovery performance of the fabric and achieving the anti-wrinkle effect.

[0004] The prior art such as Chinese Patent CN108532088A discloses a hemp double-layer and double-sided fabric, which blends hemp fibers with polylactic acid fibers to weave an inner layer fabric; blends hemp fibers with polyester fibers to weave an outer layer fabric; composites the inner layer fabric and the outer layer fabric, and the obtained hemp double-layer fabric has various properties such as good dyeing fastness, easy to clean, light-resistant, good skin-friendly property, and anti-ultraviolet. However, the solution does not effectively improve the wrinkle-prone performance of hemp fibers, and the moisture absorption performance and antibacterial performance of the fabric have not been improved either. Summary of the Invention

[0005] The purpose of the present invention is to overcome the deficiencies of the prior art and provide a hemp moisture-absorbing composite anti-wrinkle fabric and a preparation method thereof, which fabric has good antibacterial and moisture absorption effects and excellent anti-wrinkle effect.

[0006] In order to achieve the above purpose, the technical scheme adopted by the present invention is as follows: A preparation method of a hemp moisture-absorbing composite anti-wrinkle fabric, comprising the following steps: Step (1), blend hemp fibers with cotton fibers to obtain a hemp / cotton blended yarn; mix the hemp / cotton blended yarn with an aqueous sodium hydroxide solution, activate, take out after the activation ends, wash, and obtain an activated hemp / cotton blended yarn; Mix the activated hemp / cotton blended yarn with an antibacterial finishing solution, react, take out after the reaction ends, dry, and obtain an antibacterial modified hemp / cotton blended yarn; Among them, the antibacterial finishing solution is prepared by the following steps: S11. Mix p-hydroxybenzaldehyde, biuret, and aqueous hydrochloric acid solution, react, and after the reaction is completed, purify to obtain product A; S12. Mix succinic anhydride, 3-dimethylamino-1-propanol, and tetrahydrofuran, react, and after the reaction is completed, add 2-chloro-4,6-dimethoxy-1,3,5-triazine and N-methylmorpholine, stir, filter, take the filter cake, and recrystallize to obtain product B; S13. Mix product A, product B, and dichloromethane, add the catalyst palladium acetate and potassium phosphate, react, and after the reaction is completed, carry out suction filtration, rotary evaporation, and recrystallization to obtain product C; S14. Mix product C and 10 wt% aqueous sodium hypochlorite solution for chlorination. After chlorination is completed, carry out rotary evaporation and drying to obtain chlorinated product C; mix chlorinated product C, γ-chloropropyltrimethoxysilane, and ethanol, react, and after the reaction is completed, carry out rotary evaporation and drying to obtain the antibacterial agent; mix the antibacterial agent with water to obtain the antibacterial finishing liquid; Step (2). Use the antibacterial modified hemp / cotton blended yarn as the warp and the pure cotton fiber yarn as the weft, and carry out weaving to obtain a single-layer fabric; Immerse the single-layer fabric in the wrinkle-proof finishing liquid, and after immersion is completed, dry it to obtain the outer layer fabric and the inner layer fabric respectively; Among them, the wrinkle-proof finishing liquid is prepared through the following steps: S21. Mix amino-functionalized zinc oxide and N,N-dimethylformamide, carry out ultrasonic dispersion, add succinic anhydride, react, and after the reaction is completed, filter, wash, and dry to obtain carboxyl-functionalized zinc oxide; S22. Mix maleic acid, itaconic acid, acrylic acid, and water and stir, dropwise add aqueous ammonium persulfate solution, and after dropping is completed, react. After the reaction is completed, obtain an aqueous solution of a polycarboxylic acid copolymer with a solid content; Mix carboxyl-functionalized zinc oxide, the aqueous solution of the polycarboxylic acid copolymer, the catalyst sodium hypophosphite, and water to obtain the wrinkle-proof finishing liquid; Step (3). Bond the outer layer fabric and the inner layer fabric, stack and align them, and use cotton sewing thread to sew the outer layer fabric and the inner layer fabric through a multi-layer fabric quilting machine to obtain the hemp moisture-absorbing composite wrinkle-proof fabric.

[0007] Preferably, in the said step (1): the mass ratio of hemp fiber to cotton fiber is 20 - 30:70 - 80; the yarn count of the hemp / cotton blended yarn is 60S in English count; the bath ratio of the hemp / cotton blended yarn to the aqueous sodium hydroxide solution is 1:40 - 50, and the aqueous sodium hydroxide solution is 1 mol / L aqueous sodium hydroxide solution; the activation condition is: activate at room temperature for 1 - 1.5 h.

[0008] Preferably, in the step (1): the bath ratio of the activated hemp / cotton blended yarn to the antibacterial finishing solution is 1:30 - 40; the reaction conditions are: reacting at a temperature of 85 - 90 °C for 20 - 30 min.

[0009] Preferably, when preparing the antibacterial finishing solution in the step (1), in S11: the mass ratio of p-hydroxybenzaldehyde, biuret, and aqueous hydrogen chloride solution is 4.8 - 5:4.2 - 4.5:38 - 40, and the aqueous hydrogen chloride solution is a 37 wt% aqueous hydrogen chloride solution; the reaction conditions are: reacting at room temperature for 22 - 26 h.

[0010] Preferably, when preparing the antibacterial finishing solution in the step (1), in S11: the purification operation includes: taking the reaction product after the reaction, adding ice water at 0 °C with a mass 8 - 10 times that of the reaction product, filtering, taking the filter cake, washing until the pH value of the washing liquid is 5, drying at a temperature of 50 - 60 °C for 8 - 10 h, and then performing recrystallization with water.

[0011] Preferably, when preparing the antibacterial finishing solution in the step (1), in S12: the mass ratio of succinic anhydride, 3-dimethylamino-1-propanol, tetrahydrofuran, 2-chloro-4,6-dimethoxy-1,3,5-triazine, and N-methylmorpholine is 3:3 - 3.1:120 - 150:4.5 - 4.6:2.5 - 2.6; the reaction conditions are: reacting at a temperature of 75 - 85 °C for 1 - 1.5 h; the stirring condition is: stirring at a temperature of 0 °C for 1 h.

[0012] Preferably, when preparing the antibacterial finishing solution in the step (1), in S13: the mass ratio of product A, product B, dichloromethane, palladium acetate, and potassium phosphate is 0.7 - 0.8:0.9 - 1:15 - 20:0.01 - 0.02:0.01 - 0.02; the reaction conditions are: reacting at a temperature of 70 - 80 °C for 1 - 2 h.

[0013] Preferably, when preparing the antibacterial finishing solution in the step (1), in S14: the mass ratio of product C to the 10 wt% sodium hypochlorite aqueous solution is 1:10; the chlorination condition is: chlorinating at room temperature for 1 - 1.5 h; the mass ratio of the chlorinated product C, γ-chloropropyltrimethoxysilane, and ethanol is 2.4 - 2.5:1 - 1.3:50 - 60; the reaction conditions are: reacting at a temperature of 75 - 85 °C for 8 - 10 h; the mass ratio of the antibacterial agent to water is 1 - 1.5:100.

[0014] Preferably, in the step (2): the gram weight of the single-layer fabric is 120 - 140 g / m 2;The bath ratio of the single-layer fabric to the anti-wrinkle finishing solution is 1:20 - 30; the padding conditions are: impregnation at room temperature for 5 - 8 min, two-bath two-padding, and the pick-up rate is 90 - 100%; the drying conditions are: pre-drying at 80 - 85 °C for 2 - 3 min and curing at 170 - 180 °C for 2 - 3 min.

[0015] Preferably, when preparing the anti-wrinkle finishing solution in step (2), in S21: the mass ratio of amino-functionalized zinc oxide, N,N-dimethylformamide, and succinic anhydride is 0.2 - 0.25:70 - 80:0.7; the reaction conditions are: reaction at a rotation speed of 500 - 600 r / min and room temperature for 20 - 24 h.

[0016] Preferably, when preparing the anti-wrinkle finishing solution in step (2), in S22: the molar ratio of maleic acid, itaconic acid, acrylic acid, and ammonium persulfate is 1:1:1:0.1 - 0.12; the ammonium persulfate aqueous solution is a 30 wt% ammonium persulfate aqueous solution, and the dropping conditions are: dropping in a nitrogen atmosphere at 80 - 85 °C for 2 - 2.5 h; the reaction conditions are: reaction at 80 - 85 °C for 0.5 - 1 h; the solid content of the aqueous solution of the polycarboxylic acid copolymer is 30 wt%; the mass ratio of carboxyl-functionalized zinc oxide, the aqueous solution of the polycarboxylic acid copolymer, the catalyst sodium hypophosphite, and water is 1 - 1.5:25 - 30:4 - 5:100.

[0017] Preferably, a hemp moisture-absorbing composite anti-wrinkle fabric prepared by using the preparation method of the hemp moisture-absorbing composite anti-wrinkle fabric as described above.

[0018] Compared with the prior art, the beneficial effects of the present invention are as follows: The present invention uses p-hydroxybenzaldehyde, biuret, succinic anhydride, and 3-dimethylamino-1-propanol to prepare product C with a haloamine precursor structure, which is chlorinated and then undergoes a quaternization reaction with γ-chloropropyltrimethoxysilane to obtain a multifunctional antibacterial agent containing a quaternary ammonium salt cation structure, a haloamine structure, and an organosilicon segment. The antibacterial finishing solution is prepared and used for antibacterial finishing of the alkali-treated hemp / cotton blended yarn. The siloxane structure in the antibacterial agent undergoes dehydration condensation with the hydroxyl groups of cellulose in the yarn during finishing, so that the antibacterial component is bonded to the alkali-activated hemp / cotton blended yarn, and an antibacterial modified hemp / cotton blended yarn is prepared; among them, due to the synergistic antibacterial effect of the quaternary ammonium salt and the haloamine, the blended yarn is endowed with excellent antibacterial performance; the introduction of the quaternary ammonium salt cation group makes the surface of the antibacterial modified hemp / cotton blended yarn have a cationic group, improving the hydrophilic moisture absorption ability of the blended yarn; the organosilicon segment improves the softness of the blended yarn and improves the wearing comfort of the fabric; The present invention weaves an antibacterial modified hemp / cotton blended yarn and pure cotton fibers into a single-layer fabric, and performs wrinkle-resistant finishing on the single-layer fabric with a wrinkle-resistant finishing solution containing a polycarboxylic acid copolymer to obtain an outer layer fabric and an inner layer fabric. After laminating and compounding, a hemp moisture-absorbing composite wrinkle-resistant fabric is obtained; wherein, the wrinkle-resistant finishing solution is prepared by mixing carboxylated zinc oxide, an aqueous solution of polycarboxylic acid copolymer, a catalyst sodium hypophosphite, and water. Carboxylated zinc oxide can not only improve the antibacterial performance of the fabric, but also react with the polycarboxylic acid copolymer and the cellulose fibers of the fabric to undergo an esterification reaction during padding, and can interact with the cationic groups on the antibacterial modified hemp / cotton blended yarn, effectively restricting the relative sliding between fiber molecules and synergistically improving the wrinkle-resistant effect of the fabric; the multi-layer fabric can improve the wrinkle-resistant ability of the composite fabric in terms of structure. Brief Description of the Drawings

[0019] Figure 1 is a process flow chart for preparing a hemp moisture-absorbing composite wrinkle-resistant fabric in the present invention; Figure 2 is a structural schematic diagram of the hemp moisture-absorbing composite wrinkle-resistant fabric prepared in the present invention; Figure 3 is a bar chart of the wrinkle recovery angle in the performance test of the hemp composite fabric prepared in the examples and comparative examples of the present invention; Figure 4 is a bar chart of the antibacterial rate in the performance test of the hemp composite fabric prepared in the examples and comparative examples of the present invention; In the figure: 1. Outer layer fabric; 2. Inner layer fabric. Detailed Description of the Invention

[0020] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in combination with the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without making creative efforts shall fall within the protection scope of the present invention.

[0021] Example 1

[0022] This example discloses a preparation method of a hemp moisture-absorbing composite wrinkle-resistant fabric, including the following steps: Step (1): Blend hemp fibers and cotton fibers at a mass ratio of 30:70 to obtain a hemp / cotton blended yarn with a yarn count of 60S in English count; mix the hemp / cotton blended yarn with a 1 mol / L sodium hydroxide aqueous solution at a bath ratio of 1:40, activate at room temperature for 1 h, take it out after activation, wash it to neutrality, and obtain the activated hemp / cotton blended yarn; The activated hemp / cotton blended yarn is mixed with the antibacterial finishing solution at a bath ratio of 1:30, reacted at 85 °C for 30 min, taken out after the reaction, and dried at 50 °C for 48 h to obtain the antibacterial modified hemp / cotton blended yarn; Among them, the antibacterial finishing solution is prepared by the following steps: S11. p-Hydroxybenzaldehyde, biuret, and 37 wt% aqueous hydrogen chloride solution are mixed at a mass ratio of 4.9:4.3:40, reacted at room temperature for 24 h. After the reaction, the reaction product is obtained, 10 times the mass of the reaction product of ice water at 0 °C is added, filtered, the filter cake is taken, washed until the pH value of the washing liquid is 5, dried at 55 °C for 8 h, and then recrystallized with water to obtain product A; S12. Succinic anhydride, 3-dimethylamino-1-propanol, and tetrahydrofuran are mixed, reacted at 80 °C for 1 h. After the reaction, 2-chloro-4,6-dimethoxy-1,3,5-triazine and N-methylmorpholine are added, stirred at 0 °C for 1 h, filtered, the filter cake is taken, and then recrystallized with dichloromethane to obtain product B; Among them, the mass ratio of succinic anhydride, 3-dimethylamino-1-propanol, tetrahydrofuran, 2-chloro-4,6-dimethoxy-1,3,5-triazine, and N-methylmorpholine is 3:3.05:130:4.55:2.55; S13. Product A, product B, and dichloromethane are mixed, catalyst palladium acetate and potassium phosphate are added, reacted at 75 °C for 1.5 h. After the reaction, suction filtration is carried out, the filtrate is taken, the solvent dichloromethane is removed by rotary evaporation, and then recrystallized with dichloromethane to obtain product C; Among them, the mass ratio of product A, product B, dichloromethane, palladium acetate, and potassium phosphate is 0.75:0.95:18:0.01:0.02; S14. Product C and 10 wt% aqueous sodium hypochlorite solution are mixed at a mass ratio of 1:10, chlorinated at room temperature for 1 h. After chlorination, the solvent water is removed by rotary evaporation, dried at 50 °C for 30 h to obtain the chlorinated product C; the chlorinated product C, γ-chloropropyltrimethoxysilane, and ethanol are mixed at a mass ratio of 2.4:1:50, reacted at 75 °C for 10 h. After the reaction, the solvent ethanol is removed by rotary evaporation, dried at 50 °C for 10 h to obtain the antibacterial agent; the antibacterial agent is mixed with water at a mass ratio of 1:100 to obtain the antibacterial finishing solution; Step (2). The antibacterial modified hemp / cotton blended yarn is used as the warp, and the pure cotton fiber yarn is used as the weft, and woven to obtain a single-layer fabric with a gram weight of 120 g / m 2 ; The single-layer fabric is impregnated with a wrinkle-proof finishing solution at a bath ratio of 1:20, impregnated at room temperature for 5 minutes, double-dipped and double-rolled, with a liquor pickup rate of 90%. After impregnation, it is pre-dried at 80°C for 3 minutes and baked at 170°C for 3 minutes to obtain the outer fabric and the inner fabric respectively; Among them, the wrinkle-proof finishing solution is prepared through the following steps: S21. Mix amino-functionalized zinc oxide with N,N-dimethylformamide, ultrasonically disperse for 20 minutes, add succinic anhydride, and the mass ratio of amino-functionalized zinc oxide, N,N-dimethylformamide, and succinic anhydride is 0.2:70:0.7. React at a rotation speed of 500 r / min and room temperature for 24 hours. After the reaction, filter, take the filter cake, wash it three times with water and ethanol 8 times the mass of the filter cake in sequence, and dry it at 50°C for 10 hours to obtain carboxyl-functionalized zinc oxide; S22. Mix maleic acid, itaconic acid, acrylic acid, and water and stir. Dropwise add an aqueous solution of 30 wt% ammonium persulfate at 80°C under a nitrogen atmosphere for 2 hours. After dropping, react at 80°C for 1 hour. After the reaction, obtain an aqueous solution of a polycarboxylic acid copolymer with a solid content of 30 wt%; Among them, the molar ratio of maleic acid, itaconic acid, acrylic acid, and ammonium persulfate is 1:1:1:0.1; Mix carboxyl-functionalized zinc oxide, the aqueous solution of the polycarboxylic acid copolymer, the catalyst sodium hypophosphite, and water in a mass ratio of 1:25:4:100 to obtain the wrinkle-proof finishing solution; Step (3). Bond the outer fabric and the inner fabric, stack and align them, and use cotton sewing thread to stitch the outer fabric and the inner fabric through a multi-layer fabric quilting machine to obtain a hemp moisture-absorbing composite wrinkle-proof fabric.

[0023] Example 2 This example discloses a preparation method of a hemp moisture-absorbing composite wrinkle-proof fabric, including the following steps: Step (1). Blend hemp fiber and cotton fiber in a mass ratio of 30:70 to obtain a hemp / cotton blended yarn with an English count of 60S; Mix the hemp / cotton blended yarn with a 1 mol / L sodium hydroxide aqueous solution at a bath ratio of 1:40, activate at room temperature for 1 hour, take it out after activation, and wash it to neutral to obtain the activated hemp / cotton blended yarn; Mix the activated hemp / cotton blended yarn with an antibacterial finishing solution at a bath ratio of 1:35, react at 85°C for 30 minutes, take it out after the reaction, and dry it at 55°C for 48 hours to obtain an antibacterial-modified hemp / cotton blended yarn; Among them, the antibacterial finishing solution is prepared through the following steps: The product C and an aqueous solution of sodium hypochlorite at 10 wt% were mixed at a mass ratio of 1:10 and chlorinated at room temperature for 1 h. After the chlorination was completed, the solvent water was removed by rotary evaporation and dried at 50 °C for 30 h to obtain the chlorinated product C; the chlorinated product C, γ-chloropropyltrimethoxysilane, and ethanol were mixed at a mass ratio of 2.43:1.1:55 and reacted at 80 °C for 9 h. After the reaction was completed, the solvent ethanol was removed by rotary evaporation and dried at 55 °C for 9 h to obtain the antibacterial agent; the antibacterial agent and water were mixed at a mass ratio of 1.2:100 to obtain the antibacterial finishing solution; Among them, the preparation of the product C was the same as that in Example 1; Step (2): Use the antibacterial modified hemp / cotton blended yarn as the warp and the pure cotton fiber yarn as the weft, and weave them on a loom to obtain a single-layer fabric with a grammage of 125 g / m 2 ²; The single-layer fabric was impregnated with the anti-wrinkle finishing solution, the bath ratio was 1:20, impregnated at room temperature for 6 min, double-dipped and double-rolled, the liquor pickup rate was 95%, and after the impregnation was completed, it was pre-dried at 80 °C for 3 min and baked at 175 °C for 2.5 min to obtain the outer layer fabric and the inner layer fabric respectively; Among them, the anti-wrinkle finishing solution was prepared through the following steps: Maleic acid, itaconic acid, acrylic acid, and water were mixed and stirred, and an aqueous solution of ammonium persulfate at 30 wt% was added dropwise at 80 °C under a nitrogen atmosphere for 2 h. After the addition was completed, the reaction was carried out at 80 °C for 1 h. After the reaction was completed, an aqueous solution of a polycarboxylic acid copolymer with a solid content of 30 wt% was obtained; Among them, the molar ratio of maleic acid, itaconic acid, acrylic acid, and ammonium persulfate was 1:1:1:0.1; Carboxylated zinc oxide, the aqueous solution of the polycarboxylic acid copolymer, the catalyst sodium hypophosphite, and water were mixed at a mass ratio of 1.2:26:4.5:100 to obtain the anti-wrinkle finishing solution; Among them, the preparation of the carboxylated zinc oxide was the same as that in Example 1; Step (3): The outer layer fabric and the inner layer fabric were laminated and aligned, and the outer layer fabric and the inner layer fabric were sewn together with cotton sewing thread using a multi-layer fabric quilting machine to obtain the hemp moisture-absorbing composite anti-wrinkle fabric.

[0024] Example 3 This example discloses a preparation method of a hemp moisture-absorbing composite anti-wrinkle fabric, including the following steps: Step (1): Hemp fibers and cotton fibers were blended at a mass ratio of 30:70 to obtain a hemp / cotton blended yarn with a yarn count of 60S in English count; the hemp / cotton blended yarn was mixed with a 1 mol / L aqueous solution of sodium hydroxide, the bath ratio was 1:45, and activated at room temperature for 1.3 h. After the activation was completed, it was taken out and washed to neutrality to obtain the activated hemp / cotton blended yarn; The activated hemp / cotton blended yarn is mixed with the antibacterial finishing solution at a bath ratio of 1:35, reacted at 88 °C for 25 min, taken out after the reaction, and dried at 55 °C for 48 h to obtain the antibacterial modified hemp / cotton blended yarn; Among them, the antibacterial finishing solution is prepared by the following steps: The product C and 10 wt% aqueous sodium hypochlorite solution are mixed at a mass ratio of 1:10, chlorinated at room temperature for 1.3 h. After the chlorination, the solvent water is removed by rotary evaporation, and dried at 55 °C for 26 h to obtain the chlorinated product C; the chlorinated product C, γ-chloropropyltrimethoxysilane, and ethanol are mixed at a mass ratio of 2.45:1.2:55, reacted at 80 °C for 9 h. After the reaction, the solvent ethanol is removed by rotary evaporation, and dried at 55 °C for 9 h to obtain the antibacterial agent; the antibacterial agent is mixed with water at a mass ratio of 1.3:100 to obtain the antibacterial finishing solution; Among them, the preparation of the product C is the same as that in Example 1; Step (2), using the antibacterial modified hemp / cotton blended yarn as the warp and the pure cotton fiber yarn as the weft, and weaving to obtain a single-layer fabric with a gram weight of 130 g / m 2 of single-layer fabric; The single-layer fabric is impregnated with the anti-wrinkle finishing solution, the bath ratio is 1:25, impregnated at room temperature for 6 min, two-dip two-roll, the liquor pickup rate is 95%. After the impregnation, pre-dried at 83 °C for 2.5 min and baked at 175 °C for 2.5 min to obtain the outer layer fabric and the inner layer fabric respectively; Among them, the anti-wrinkle finishing solution is prepared by the following steps: Maleic acid, itaconic acid, acrylic acid, and water are mixed and stirred, and 30 wt% aqueous ammonium persulfate solution is added dropwise at 83 °C in a nitrogen atmosphere, the dropping time is 2.3 h. After the dropping is completed, reacted at 83 °C for 0.8 h. After the reaction, a polycarboxylic acid copolymer aqueous solution with a solid content of 30 wt% is obtained; Among them, the molar ratio of maleic acid, itaconic acid, acrylic acid, and ammonium persulfate is 1:1:1:0.11; Carboxylated zinc oxide, polycarboxylic acid copolymer aqueous solution, catalyst sodium hypophosphite, and water are mixed at a mass ratio of 1.3:28:4.5:100 to obtain the anti-wrinkle finishing solution; Among them, the preparation of the carboxylated zinc oxide is the same as that in Example 1; Step (3), laminating and aligning the outer layer fabric and the inner layer fabric, and using cotton sewing thread to stitch the outer layer fabric and the inner layer fabric through a multi-layer fabric quilting machine to obtain the hemp moisture-absorbing composite anti-wrinkle fabric.

[0025] Example 4 This embodiment discloses a preparation method of a hemp moisture-absorbing composite anti-wrinkle fabric, including the following steps: Step (1): Blend hemp fibers and cotton fibers in a mass ratio of 30:70 to obtain a hemp / cotton blended yarn with an English count of 60S; mix the hemp / cotton blended yarn with a 1 mol / L sodium hydroxide aqueous solution at a bath ratio of 1:45, activate at room temperature for 1.5 h, take out after activation, wash until neutral to obtain the activated hemp / cotton blended yarn; Mix the activated hemp / cotton blended yarn with the antibacterial finishing solution at a bath ratio of 1:35, react at 90 °C for 20 min, take out after the reaction, and dry at 55 °C for 48 h to obtain the antibacterial modified hemp / cotton blended yarn; Among them, the antibacterial finishing solution is prepared through the following steps: Mix product C and a 10 wt% sodium hypochlorite aqueous solution in a mass ratio of 1:10, chlorinate at room temperature for 1.5 h, after chlorination, rotary evaporate to remove the solvent water, and dry at 55 °C for 26 h to obtain the chlorinated product C; mix the chlorinated product C, γ-chloropropyltrimethoxysilane, and ethanol in a mass ratio of 2.48:1.25:55, react at 85 °C for 8 h, after the reaction, rotary evaporate to remove the solvent ethanol, and dry at 55 °C for 9 h to obtain the antibacterial agent; mix the antibacterial agent and water in a mass ratio of 1.4:100 to obtain the antibacterial finishing solution; Among them, the preparation of product C is the same as that in Example 1; Step (2): Use the antibacterial modified hemp / cotton blended yarn as the warp and the pure cotton fiber yarn as the weft, and weave to obtain a single-layer fabric with a gram weight of 135 g / m 2 ; Immerse the single-layer fabric in the anti-wrinkle finishing solution at a bath ratio of 1:25, immerse at room temperature for 6 min, dip and roll twice, with a liquor pick-up rate of 95%, after immersion, pre-dry at 85 °C for 2 min, and cure at 175 °C for 2.5 min to obtain the outer layer fabric and the inner layer fabric respectively; Among them, the anti-wrinkle finishing solution is prepared through the following steps: Mix maleic acid, itaconic acid, acrylic acid, and water and stir, dropwise add a 30 wt% ammonium persulfate aqueous solution in a nitrogen atmosphere at 85 °C, with a dropping time of 2.5 h, after dropping, react at 85 °C for 0.5 h, after the reaction, obtain an aqueous solution of a polycarboxylic acid copolymer with a solid content of 30 wt%; Among them, the molar ratio of maleic acid, itaconic acid, acrylic acid, and ammonium persulfate is 1:1:1:0.12; Mix carboxylated zinc oxide, the aqueous solution of the polycarboxylic acid copolymer, the catalyst sodium hypophosphite, and water in a mass ratio of 1.4:29:4.5:100 to obtain the anti-wrinkle finishing solution; Among them, the preparation of carboxylated zinc oxide is the same as that in Example 1; Step (3): Bond the outer fabric and the inner fabric, stack and align them, and use cotton sewing thread to sew the outer fabric and the inner fabric through a multi-layer fabric quilting machine to obtain a hemp moisture-absorbing composite anti-wrinkle fabric.

[0026] Example 5 This example discloses a preparation method of a hemp moisture-absorbing composite anti-wrinkle fabric, including the following steps: Step (1): Blend hemp fiber and cotton fiber at a mass ratio of 30:70 to obtain a hemp / cotton blended yarn with an English count of 60S; mix the hemp / cotton blended yarn with a 1 mol / L sodium hydroxide aqueous solution, with a liquor ratio of 1:50, activate at room temperature for 1.5 h, take it out after activation, wash until neutral to obtain the activated hemp / cotton blended yarn; Mix the activated hemp / cotton blended yarn with the antibacterial finishing liquor at a liquor ratio of 1:40, react at 90 °C for 20 min, take it out after the reaction, and dry at 60 °C for 48 h to obtain the antibacterial modified hemp / cotton blended yarn; Among them, the antibacterial finishing liquor is prepared through the following steps: Mix product C and a 10 wt% sodium hypochlorite aqueous solution at a mass ratio of 1:10, chlorinate at room temperature for 1.5 h, after chlorination, rotary evaporate to remove the solvent water, and dry at 60 °C for 25 h to obtain the chlorinated product C; mix the chlorinated product C, γ-chloropropyltrimethoxysilane, and ethanol at a mass ratio of 2.5:1.3:60, react at 85 °C for 8 h, after the reaction, rotary evaporate to remove the solvent ethanol, and dry at 60 °C for 8 h to obtain the antibacterial agent; mix the antibacterial agent and water at a mass ratio of 1.5:100 to obtain the antibacterial finishing liquor; Among them, the preparation of product C is the same as that in Example 1; Step (2): Use the antibacterial modified hemp / cotton blended yarn as the warp and the pure cotton fiber yarn as the weft, and weave to obtain a single-layer fabric with a gram weight of 140 g / m 2 ². Immerse the single-layer fabric in the anti-wrinkle finishing liquor, with a liquor ratio of 1:30, immerse at room temperature for 8 min, dip two times and roll two times, with a liquor pick-up rate of 100%, after immersion, pre-dry at 85 °C for 2 min, and cure at 180 °C for 2 min to obtain the outer fabric and the inner fabric respectively; Among them, the anti-wrinkle finishing liquor is prepared through the following steps: Mix maleic acid, itaconic acid, acrylic acid and water, and stir. While under a nitrogen atmosphere and at a temperature of 85 °C, dropwise add an aqueous solution of ammonium persulfate at 30 wt%. The dropping time is 2.5 h. After the dropping is completed, react at a temperature of 85 °C for 0.5 h. After the reaction ends, obtain an aqueous solution of a polycarboxylic acid copolymer with a solid content of 30 wt%. Among them, the molar ratio of maleic acid, itaconic acid, acrylic acid and ammonium persulfate is 1:1:1:0.12; Mix carboxylated zinc oxide, the aqueous solution of the polycarboxylic acid copolymer, the catalyst sodium hypophosphite and water in a mass ratio of 1.5:30:5:100 to obtain an anti-wrinkle finishing solution; Among them, the preparation of the carboxylated zinc oxide is the same as that in Example 1; Step (3): Bond the outer fabric and the inner fabric, stack and align them, and use cotton sewing thread to sew the outer fabric and the inner fabric through a multi-layer fabric quilting machine to obtain a hemp moisture-absorbing composite anti-wrinkle fabric.

[0027] Comparative Example 1 This comparative example discloses a preparation method of a hemp composite fabric, including the following steps: Step (1): Blend hemp fiber and cotton fiber in a mass ratio of 30:70 to obtain a hemp / cotton blended yarn with a yarn count of 60S English count; Step (2): Use the hemp / cotton blended yarn as the warp and the pure cotton fiber yarn as the weft, and carry out weaving to obtain a single-layer fabric with a gram weight of 120 g / m 2 ; Immerse the single-layer fabric in the anti-wrinkle finishing solution, with a liquor ratio of 1:20. Immerse at room temperature for 5 min, dip two times and roll two times, and the expression rate is 90%. After the immersion ends, pre-dry at a temperature of 80 °C for 3 min and cure at a temperature of 170 °C for 3 min to obtain the outer fabric and the inner fabric respectively; Among them, the anti-wrinkle finishing solution is prepared through the following steps: Mix maleic acid, itaconic acid, acrylic acid and water, and stir. While under a nitrogen atmosphere and at a temperature of 80 °C, dropwise add an aqueous solution of ammonium persulfate at 30 wt%. The dropping time is 2 h. After the dropping is completed, react at a temperature of 80 °C for 1 h. After the reaction ends, obtain an aqueous solution of a polycarboxylic acid copolymer with a solid content of 30 wt%. Among them, the molar ratio of maleic acid, itaconic acid, acrylic acid and ammonium persulfate is 1:1:1:0.1; Mix carboxylated zinc oxide, the aqueous solution of the polycarboxylic acid copolymer, the catalyst sodium hypophosphite and water in a mass ratio of 1:25:4:100 to obtain an anti-wrinkle finishing solution; Among them, the preparation of the carboxylated zinc oxide is the same as that in Example 1; Step (3): Bond the outer fabric and the inner fabric, stack and align them, and use cotton sewing thread to sew the outer fabric and the inner fabric through a multi-layer fabric quilting machine to obtain the hemp moisture-absorbing composite anti-wrinkle fabric.

[0028] Comparative Example 2 This comparative example discloses a preparation method of a hemp composite fabric, including the following steps: Step (1): Blend hemp fibers and cotton fibers at a mass ratio of 30:70 to obtain a hemp / cotton blended yarn with an English count of 60S; mix the hemp / cotton blended yarn with a 1 mol / L sodium hydroxide aqueous solution at a bath ratio of 1:40, activate at room temperature for 1 h, take out after activation, wash until neutral to obtain the activated hemp / cotton blended yarn; Mix the activated hemp / cotton blended yarn with the antibacterial finishing solution at a bath ratio of 1:30, react at 85 °C for 30 min, take out after the reaction, dry at 50 °C for 48 h to obtain the antibacterial modified hemp / cotton blended yarn; Among them, the antibacterial finishing solution is prepared through the following steps: Mix product C and a 10 wt% sodium hypochlorite aqueous solution at a mass ratio of 1:10, chlorinate at room temperature for 1 h, after chlorination, rotary evaporate to remove the solvent water, dry at 50 °C for 30 h to obtain the chlorinated product C; mix the chlorinated product C, γ-chloropropyltrimethoxysilane, and ethanol at a mass ratio of 2.4:1:50, react at 75 °C for 10 h, after the reaction, rotary evaporate to remove the solvent ethanol, dry at 50 °C for 10 h to obtain the antibacterial agent; mix the antibacterial agent and water at a mass ratio of 1:100 to obtain the antibacterial finishing solution; Among them, the preparation of product C is the same as that in Example 1; Step (2): Use the antibacterial modified hemp / cotton blended yarn as the warp and the pure cotton fiber yarn as the weft, and weave to obtain a single-layer fabric with a gram weight of 120 g / m 2 ; Immerse the single-layer fabric in the anti-wrinkle finishing solution at a bath ratio of 1:20, immerse at room temperature for 5 min, dip two times and roll two times, with a liquor pickup rate of 90%, after immersion, pre-dry at 80 °C for 3 min, cure at 170 °C for 3 min to obtain the outer fabric and the inner fabric respectively; Among them, the anti-wrinkle finishing solution is prepared through the following steps: Mix maleic acid, itaconic acid, acrylic acid, and water and stir, dropwise add a 30 wt% ammonium persulfate aqueous solution in a nitrogen atmosphere at 80 °C, with a dropping time of 2 h, after dropping, react at 80 °C for 1 h, after the reaction, obtain an aqueous solution of a polycarboxylic acid copolymer with a solid content of 30 wt%; Among them, the molar ratio of maleic acid, itaconic acid, acrylic acid, and ammonium persulfate is 1:1:1:0.1; Mix the aqueous solution of the polycarboxylic acid copolymer, the catalyst sodium hypophosphite, and water in a mass ratio of 25:4:100 to obtain a wrinkle-proof finishing solution; Step (3): Bond the outer fabric and the inner fabric, stack and align them, and use cotton sewing thread to stitch the outer fabric and the inner fabric through a multi-layer fabric quilting machine to obtain a hemp moisture-absorbing composite wrinkle-proof fabric.

[0029] In the above examples and comparative examples: The amino-functionalized zinc oxide was self-prepared, and the preparation method included: mixing γ-aminopropylmethyldiethoxysilane, nano-zinc oxide, and ethanol in a mass ratio of 0.1:0.1:15, reacting at 60 °C for 1 h, after the reaction ended, filtering, taking the filter cake, adding ethanol for washing, and drying at 60 °C for 12 h to obtain amino-functionalized zinc oxide; the nano-zinc oxide was from Aladdin Biochemical Technology Co., Ltd., with a particle size of 50 nm; The hemp fiber was from Liaoning Xinyi Hemp New Material Technology Development Co., Ltd., with an average fiber length of 30 mm; the cotton fiber was long-staple cotton, with a fiber length of 38 - 39 mm; the yarn count of the pure cotton fiber yarn was 60S English count; biuret was from Macklin Biochemical Technology Co., Ltd., CAS number: 108-19-0; γ-chloropropyltrimethoxysilane was from Macklin Biochemical Technology Co., Ltd., CAS number: 2530-87-2.

[0030] Test Example Conduct comprehensive performance tests on the hemp composite fabrics prepared in the examples and comparative examples. The specific test results are shown in Table 1:

[0031] The detection of each index in Table 1 was based on the following standards respectively: The antibacterial rate was determined with reference to GB / T20944.3-2008 "Evaluation of Antibacterial Properties of Textiles - Part 3: Oscillation Method", and the bacterial strain used was Escherichia coli; the crease recovery angle was determined with reference to GB / T3819-1997 "Textiles - Determination of Crease Recovery of Fabrics - Recovery Angle Method"; the water absorption rate was determined by GB / T21655.1-2008 "Textiles - Evaluation of Moisture Absorption and Quick Drying - Part 1: Single Item Combined Test Method".

[0032] It can be seen from the test results in Table 1 that the hemp composite fabric prepared by the present invention has good moisture absorption performance, antibacterial effect, and wrinkle-proof effect.

[0033] In Comparative Example 1, the hemp / cotton blended yarn was not subjected to antibacterial modification. Only carboxylated zinc oxide was used as the inorganic antibacterial component to play an antibacterial role. As a result, the antibacterial performance of the fabric decreased. At the same time, the interaction between the cationic group of the antibacterial agent and the wrinkle-proof component of the wrinkle-proof finishing liquid was lacking. Therefore, the antibacterial performance and wrinkle-proof performance of Comparative Example 1 were inferior to those of the examples. In Comparative Example 2, carboxylated zinc oxide was not added. The improvement of the antibacterial performance of the fabric by carboxylated zinc oxide as an inorganic antibacterial agent was lacking. Also, the esterification reaction between carboxylated zinc oxide and the cellulose fibers of the fabric during padding was lacking, and the interaction with the cationic groups on the antibacterial modified hemp / cotton blended yarn was lacking. Therefore, the antibacterial performance and wrinkle-proof performance of Comparative Example 2 were inferior to those of the examples.

[0034] Although the embodiments of the present invention have been shown and described, for those of ordinary skill in the art, it can be understood that various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principles and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A preparation method of a hemp moisture-absorbing composite anti-wrinkle fabric, characterized in that, It includes the following steps: Step (1): Mix the activated hemp / cotton blended yarn with the antibacterial finishing solution, react, take it out after the reaction is completed, and dry it to obtain the antibacterial modified hemp / cotton blended yarn; Step (2): Use the antibacterial modified hemp / cotton blended yarn as the warp and the pure cotton fiber yarn as the weft, and perform weaving to obtain a single-layer fabric; Immerse the single-layer fabric in the wrinkle-proof finishing solution, and after the padding is completed, dry it to obtain the outer layer fabric and the inner layer fabric respectively; Step (3): Composite the outer layer fabric and the inner layer fabric to obtain the hemp moisture-absorbing composite wrinkle-proof fabric.

2. The preparation method of a hemp moisture-absorbing composite anti-wrinkle fabric according to claim 1, characterized in that, The activated hemp / cotton blended yarn in the step (1) is prepared through the following steps: Blend hemp fibers and cotton fibers to obtain a hemp / cotton blended yarn; mix the hemp / cotton blended yarn with an aqueous sodium hydroxide solution, activate it, take it out after the activation is completed, and wash it to obtain the activated hemp / cotton blended yarn.

3. The preparation method of a hemp moisture-absorbing composite anti-wrinkle fabric according to claim 2, characterized in that, When preparing the activated hemp / cotton blended yarn in the step (1): the mass ratio of hemp fibers to cotton fibers is 20-30:70-80; the yarn count of the hemp / cotton blended yarn is 60S in English count; the bath ratio of the hemp / cotton blended yarn to the aqueous sodium hydroxide solution is 1:40-50, and the aqueous sodium hydroxide solution is a 1mol / L aqueous sodium hydroxide solution; the activation conditions are: activate at room temperature for 1-1.5h.

4. The preparation method of a hemp moisture-absorbing composite anti-wrinkle fabric according to claim 1, characterized in that, In the step (1): the bath ratio of the activated hemp / cotton blended yarn to the antibacterial finishing solution is 1:30-40; the reaction conditions are: react at a temperature of 85-90°C for 20-30min.

5. The preparation method of a hemp moisture-absorbing composite anti-wrinkle fabric according to claim 1, characterized in that, The antibacterial finishing solution in the step (1) is prepared through the following steps: S11: Mix p-hydroxybenzaldehyde, biuret, and an aqueous hydrogen chloride solution, react, and after the reaction is completed, purify it to obtain product A; S12: Mix succinic anhydride, 3-dimethylamino-1-propanol, and tetrahydrofuran, react, and after the reaction is completed, add 2-chloro-4,6-dimethoxy-1,3,5-triazine and N-methylmorpholine, stir, filter, take the filter cake, and perform recrystallization to obtain product B; S13: Mix product A, product B, and dichloromethane, add the catalyst palladium acetate and potassium phosphate, react, and after the reaction is completed, perform suction filtration, rotary evaporation, and recrystallization to obtain product C; S14: Mix product C with a 10wt% aqueous sodium hypochlorite solution, chlorinate it, and after the chlorination is completed, perform rotary evaporation and drying to obtain the chlorinated product C; mix the chlorinated product C, γ-chloropropyltrimethoxysilane, and ethanol, react, and after the reaction is completed, perform rotary evaporation and drying to obtain the antibacterial agent; mix the antibacterial agent with water to obtain the antibacterial finishing solution.

6. The preparation method of a hemp moisture-absorbing composite anti-wrinkle fabric according to claim 5, characterized in that, When preparing the antibacterial finishing solution in the step (1): In S11: the mass ratio of p-hydroxybenzaldehyde, biuret, and the aqueous hydrogen chloride solution is 4.8-5:4.2-4.5:38-40, and the aqueous hydrogen chloride solution is a 37wt% aqueous hydrogen chloride solution; the reaction conditions are: react at room temperature for 22-26h; In S12: The mass ratio of succinic anhydride, 3-dimethylamino-1-propanol, tetrahydrofuran, 2-chloro-4,6-dimethoxy-1,3,5-triazine, and N-methylmorpholine is 3:3 - 3.1:120 - 150:4.5 - 4.6:2.5 - 2.6; the reaction conditions are: reacting at a temperature of 75 - 85 °C for 1 - 1.5 h; the stirring condition is: stirring at a temperature of 0 °C for 1 h; In S13: The mass ratio of product A, product B, dichloromethane, palladium acetate, and potassium phosphate is 0.7 - 0.8:0.9 - 1:15 - 20:0.01 - 0.02:0.01 - 0.02; the reaction conditions are: reacting at a temperature of 70 - 80 °C for 1 - 2 h; In S14: The mass ratio of product C and 10 wt% sodium hypochlorite aqueous solution is 1:10; the chlorination condition is: chlorinating at room temperature for 1 - 1.5 h; the mass ratio of the chlorinated product C, γ-chloropropyltrimethoxysilane, and ethanol is 2.4 - 2.5:1 - 1.3:50 - 60; the reaction conditions are: reacting at a temperature of 75 - 85 °C for 8 - 10 h; the mass ratio of the antibacterial agent to water is 1 - 1.5:

100.

7. The preparation method of a hemp moisture-absorbing composite anti-wrinkle fabric according to claim 1, characterized in that, In the step (2), the gram weight of the single-layer fabric is 120-140 g / m 2 ; the bath ratio of the single-layer fabric to the anti-wrinkle finishing solution is 1:20-30; the padding conditions are: impregnating for 5-8 min at room temperature, padding twice with two passes, and the expression rate is 90-100%; the drying conditions are: pre-drying for 2-3 min at a temperature of 80-85 °C and baking for 2-3 min at a temperature of 170-180 °C.

8. The preparation method of a hemp moisture-absorbing composite anti-wrinkle fabric according to claim 1, characterized in that, The wrinkle-resistant finishing liquid in the step (2) is prepared through the following steps: S21: Mix amino-functionalized zinc oxide with N,N-dimethylformamide, ultrasonically disperse, add succinic anhydride, react, after the reaction ends, filter, wash, and dry to obtain carboxyl-functionalized zinc oxide; S22: Mix maleic acid, itaconic acid, acrylic acid, and water, stir, dropwise add an aqueous ammonium persulfate solution, after the dropping is completed, react, after the reaction ends, obtain an aqueous solution of a polycarboxylic acid copolymer with a solid content; Mix the carboxyl-functionalized zinc oxide, the aqueous solution of the polycarboxylic acid copolymer, the catalyst sodium hypophosphite, and water to obtain the wrinkle-resistant finishing liquid.

9. The preparation method of a hemp moisture-absorbing composite anti-wrinkle fabric according to claim 8, characterized in that, When preparing the wrinkle-resistant finishing liquid in the step (2): In S21: The mass ratio of amino-functionalized zinc oxide, N,N-dimethylformamide, and succinic anhydride is 0.2 - 0.25:70 - 80:0.7; the reaction conditions are: reacting at a rotation speed of 500 - 600 r / min and at room temperature for 20 - 24 h; In S22: The molar ratio of maleic acid, itaconic acid, acrylic acid, and ammonium persulfate is 1:1:1:0.1 - 0.12; the aqueous ammonium persulfate solution is a 30 wt% aqueous ammonium persulfate solution, the dropping condition is: dropping at a temperature of 80 - 85 °C for 2 - 2.5 h in a nitrogen atmosphere; the reaction conditions are: reacting at a temperature of 80 - 85 °C for 0.5 - 1 h; the solid content of the aqueous solution of the polycarboxylic acid copolymer is 30 wt%; the mass ratio of the carboxyl-functionalized zinc oxide, the aqueous solution of the polycarboxylic acid copolymer, the catalyst sodium hypophosphite, and water is 1 - 1.5:25 - 30:4 - 5:

100.

10. A hemp moisture-absorbing composite anti-wrinkle fabric prepared by using the preparation method of the hemp moisture-absorbing composite anti-wrinkle fabric according to any one of claims 1-9.

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