Highly moisture-absorbing organic cotton blended fabric and preparation process thereof

Abstract

The application relates to the technical field of organic cotton blended fabric, and discloses a high-hygroscopic organic cotton blended fabric and a preparation process thereof; modified nano silver carbon fibers are prepared by modifying nano silver carbon fibers through graphene aerogels; then a mixed solution is prepared by polyacrylonitrile solution and the modified nano silver carbon fibers, and modified polyacrylonitrile fibers are prepared through spinning; finally, a high-hygroscopic organic cotton blended fabric is prepared by mixing and spinning of organic cotton fibers grafted with butyl methacrylate modified nano titanium dioxide particles and the modified polyacrylonitrile fibers, and the high-hygroscopic organic cotton blended fabric has the advantages of high hygroscopicity, high antibacterial property, high flexibility and high wear resistance.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of organic cotton blended fabric, in particular to a high-hygroscopic organic cotton blended fabric and a preparation process thereof. BACKGROUND

[0002] In the textile industry, cotton blended fabric is widely popular due to its comfort, softness, breathability and other advantages. Traditional cotton blended fabric is mainly made of cotton fiber and other synthetic fibers. However, with the increasing awareness of environmental protection and health, more and more consumers and manufacturers have begun to pay attention to organic cotton blended fabric. Organic cotton is a natural cotton grown without the use of chemical fertilizers and pesticides, and has the characteristics of environmental protection and safety.

[0003] In order to improve the hygroscopicity of organic cotton fabric, researchers have begun to blend organic cotton with other high-hygroscopic fibers. These high-hygroscopic fibers usually include bamboo fiber, lycra fiber, nylon fiber, modal fiber, etc. Through blending technology, the hygroscopicity and comfort of the fabric can be improved while retaining the environmental protection characteristics of organic cotton. However, in the actual production process, how to effectively realize the combination of organic cotton and high-hygroscopic fibers, and how to further improve the performance of the blended fabric are still challenging problems.

[0004] Therefore, it is of great significance to invent a high-hygroscopic organic cotton blended fabric. SUMMARY

[0005] The purpose of the present application is to provide a high-hygroscopic organic cotton blended fabric and a preparation process thereof to solve the problems raised in the background.

[0006] In order to solve the above technical problems, the present application provides the following technical solutions:

[0007] A preparation process of a high-hygroscopic organic cotton blended fabric:

[0008] S1: Add silver nitrate and polyacrylonitrile powder into N, N-dimethylformamide, heat to 60-80℃ and stir uniformly, electrospun, pre-oxidized, calcined in nitrogen atmosphere, to obtain nano-silver carbon fiber; add nano-silver carbon fiber and 3-chloropropargyl into N, N-dimethylformamide, add potassium carbonate and stir to react, wash, dry, to obtain grafted nano-silver carbon fiber; add graphene aerogel powder and grafted nano-silver carbon fiber into N, N-dimethylformamide, add N, N-dimethylpropionamide and react under light conditions, to obtain modified nano-silver carbon fiber;

[0009] S2: polyacrylonitrile powder is added to N, N-dimethylformamide, heated to 60-80℃ and stirred uniformly, the modified nanosilver carbon fiber is cut into 3-5mm short carbon fiber and added, stirred uniformly, the mixed solution is spun to obtain modified polyacrylonitrile fiber;

[0010] S3: organic cotton fiber is immersed in butyl methacrylate, modified nanometer titanium dioxide particles are added and stirred uniformly, an initiator is added, heated to 85-90℃ and reacted for 1-2h, washed, dried to obtain modified organic cotton fiber;

[0011] S4: the modified polyacrylonitrile fiber is immersed in 5-20g / L sodium hydroxide solution for 30-60min, taken out and dried at 40-80℃ for 2-3h, then mixed with the modified organic cotton fiber to spin, weave and heat treat to obtain organic cotton blended fabric.

[0012] Further, in the modified polyacrylonitrile fiber, by mass fraction, polyacrylonitrile powder is 10-20 parts, N, N-dimethylformamide is 80-100 parts, and modified nanosilver carbon fiber is 5-10 parts.

[0013] Further, in the modified organic cotton fiber, by mass fraction, organic cotton fiber is 20-30 parts, butyl methacrylate is 80-100 parts, modified nanometer titanium dioxide particles are 5-15 parts, and an initiator is 1-5 parts; the initiator is one of azobisisobutyronitrile and ammonium persulfate.

[0014] Further, in the organic cotton blended fabric, modified polyacrylonitrile fiber is 40-80 parts, and modified organic cotton fiber is 50-100 parts.

[0015] Further, the mass ratio of nanosilver carbon fiber: 3-chloropropargyl is (2-3): 1; the mass ratio of graphene aerogel powder: grafted nanosilver carbon fiber is (1-2): 1.

[0016] Further, in the step S1, the graphene aerogel powder is prepared as follows:

[0017] After the graphene is activated and ultrasonically dispersed in deionized water, silane coupling agent is added and ultrasonically dispersed uniformly, heated to 180-185℃ and reacted for 4-6h, freeze-dried and crushed to obtain graphene aerogel powder;

[0018] Further, the activation treatment is that the graphene is soaked in 5wt% methane sulfonic acid solution for 30-45min;

[0019] Further, the particle size of the graphene aerogel powder is 50-80nm;

[0020] Further, the silane coupling agent is N-aminoethyl-gamma-aminopropyl trimethoxysilane (KH792), gamma-glycidoxypropyl trimethoxysilane (KH560) and gamma-mercaptopropyl trimethoxysilane (KH590);

[0021] Further, the mass ratio of graphene: gamma-glycidoxypropyl trimethoxysilane: N-aminoethyl-gamma-aminopropyl trimethoxysilane: gamma-mercaptopropyl trimethoxysilane is 32:15:(20-30):20;

[0022] Further, the mass ratio of silver nitrate: polyacrylonitrile is 1:(1-3);

[0023] Further, the specific operation of the pre-oxidation is to heat to 140-150℃ at a heating rate of 3±0.5℃ / min, then heat to 190-200℃ at a heating rate of 2±0.5℃ / min, and finally heat to 280℃ at a heating rate of 1±0.5℃ / min;

[0024] Further, the calcination temperature is 700-800℃, and the time is 1-3h.

[0025] Further, in the step S3, the modified nano-titanium dioxide particles are silane coupling agent modified nano-titanium dioxide particles.

[0026] Further, in the step S4, the temperature of the heat treatment is 60-80℃, and the time is 1-2h.

[0027] Compared with the prior art, the present application has the following beneficial effects: the present application successfully prepares graphene aerogel by the thermal reduction and self-assembly of three silane coupling agents KH792, KH560 and KH590 with graphene at high temperature, and then the graphene aerogel is crushed by a pulverizer to prepare aerogel powder with a particle size of 50-80nm, which has the properties of porous, easy dispersion, etc.

[0028] Silver nitrate is selected as the silver source, and polyacrylonitrile is selected as the spinning polymer to prepare a fiber membrane by electrospinning, and then the fiber membrane is successfully prepared into nano-silver carbon fiber by air pre-oxidation and high-temperature carbonization treatment; the air pre-oxidation makes the cyano group of the polyacrylonitrile in the fiber membrane cyclize and form a network structure, and at the same time, under the action of dehydrogenation, the crystal system in the polyacrylonitrile forms a cyclized ladder structure, and finally through high-temperature carbonization treatment, the intermolecular connection is greatly enhanced, and the thermal stability and mechanical strength of the nano-silver carbon fiber are improved;

[0029] The graphene aerogel powder is grafted on the surface of the nanometer silver carbon fiber by click chemistry reaction between the terminal alkyne on the surface of the nanometer silver carbon fiber and the mercapto of the graphene aerogel powder. The silver nitrate is decomposed into nanometer silver particles by heating, and the nanometer silver particles are embedded in the pores of the graphene aerogel powder, thereby greatly enhancing the firmness of the grafting and preventing the nanometer silver particles from falling off. The nanometer silver particles with a particle size smaller than the pore size of the graphene aerogel powder do not block the pores and prevent the nanometer silver on the surface of the carbon fiber from falling off, thereby enhancing the water absorption performance of the fiber and greatly enhancing the antibacterial performance of the fiber.

[0030] The modified nanometer silver carbon fiber and polyacrylonitrile powder are dispersed in N,N-dimethylformamide to prepare modified polyacrylonitrile fiber by wet spinning. The surface active groups of the modified nanometer silver carbon fiber do not need additional dispersants to prevent agglomeration, and have excellent dispersing performance, thereby greatly reducing the production cost and making the production convenient and fast.

[0031] The organic cotton fiber is immersed in butyl methacrylate, and the butyl methacrylate modified nanometer titanium dioxide particles are grafted on the organic cotton fiber under the action of an initiator and a catalyst to prepare modified organic cotton fiber. The modified polyacrylonitrile fiber is treated with alkali and then spun with the modified organic cotton fiber, and a high-hygroscopic organic cotton blended fabric is prepared by heat treatment. The nanometer titanium dioxide particles are embedded in the pores of the modified polyacrylonitrile fiber during the spinning process. Since the particle size of the nanometer titanium dioxide particles is smaller than the pore size of the graphene aerogel powder and the pore size of the alkali-treated polyacrylonitrile fiber, the fabric has good wear resistance without pore blockage. The nanometer titanium dioxide particles can effectively prevent the nanometer titanium dioxide particles from entering the interior of the polyacrylonitrile fiber and competing with the nanometer silver particles to block the pores, so that the fabric has a structure of nanometer titanium dioxide particles on the outer circle and nanometer silver particles on the inner circle. The nanometer titanium dioxide particles on the outer circle can enhance the wear resistance of the fabric and have a photocatalytic effect to further improve the antibacterial performance. The nanometer silver carbon fiber and the polyacrylonitrile fiber on the inner circle can provide high flexibility, moisture absorption, and antibacterial performance to the fabric. Finally, the butyl methacrylate is crosslinked during the heat treatment process to improve the interaction between the modified organic cotton fiber and the modified polyacrylonitrile fiber. The final product (fabric) has high moisture absorption, high antibacterial performance, high wear resistance, and high flexibility. Embodiment

[0032] The technical solutions in the embodiments of the present invention will be clearly and completely described below. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0033] In the following examples, graphene (CAS1034343-98-0), silver nitrate, polyacrylonitrile (molecular weight 50000-85000), KH560, and KH590 were provided by Shanghai Maclean Biochemical Technology Co., Ltd., KH792 by Nanjing Chemical Reagent, KH570 by Nanjing Shuguang Chemical Group Co., Ltd., nano-titanium dioxide particles (particle size 10-20nm) by Zhejiang Zhoushan Nanomaterials Co., Ltd., and butyl methacrylate by Zibo Lurui Fine Chemical Co., Ltd.

[0034] Modified silver nanofibers were prepared by the following method:

[0035] 32g of graphene was ultrasonically dispersed in deionized water, and 15g of γ-glycidyl oxypropyltrimethoxysilane, 20g of N-aminoethyl-γ-aminopropyltrimethoxysilane and 20g of γ-mercaptopropyltrimethoxysilane were added and ultrasonically dispersed evenly. The mixture was heated to 180℃ and reacted for 4h. After freeze-drying and pulverizing, graphene aerogel powder was obtained.

[0036] 10g of silver nitrate and 20g of polyacrylonitrile powder were added to 150mL of N,N-dimethylformamide, heated to 60℃ and stirred until completely dissolved. Electrospinning was performed, and the temperature was increased to 145℃ at a rate of 3℃ / min and held for 30min. Then, the temperature was increased to 195℃ at a rate of 2℃ / min and held for 30min. Finally, the temperature was increased to 280℃ at a rate of 1℃ / min and held for 30min for pre-oxidation treatment. The mixture was calcined at 700℃ for 2h in a nitrogen atmosphere to obtain nano-silver carbon fibers.

[0037] 20g of nano-silver carbon fiber and 10g of 3-chloropropyne were added to 150mL of N,N-dimethylformamide, 5g of potassium carbonate was added, and the mixture was stirred and reacted for 2h. After washing and drying, grafted nano-silver carbon fiber was obtained. 20g of graphene aerogel powder and 10g of grafted nano-silver carbon fiber were added to 200mL of N,N-dimethylformamide, 3.5g of N,N-dimethylpropionamide was added, and the mixture was reacted under light to obtain modified nano-silver carbon fiber.

[0038] Silane coupling agent modified nano-titanium dioxide particles were prepared by the following method:

[0039] 1g of nano-titanium dioxide was ultrasonically dispersed in 50mL of toluene, 0.05g of KH570 was added and heated to 120℃ for 2h, filtered, washed, and dried to obtain modified nano-titanium dioxide particles.

[0040] Example 1: Preparation process of a high-hygroscopic organic cotton blended fabric:

[0041] S1: 10g of polyacrylonitrile powder was added to 100g of N,N-dimethylformamide, heated to 60℃ and stirred uniformly, 5g of modified nano-silver carbon fiber was added after being cut into 3mm short carbon fibers, and the mixture was stirred uniformly. After the mixed solution was degassed, spinning was carried out, and after passing through the coagulation bath, drying was carried out to obtain modified polyacrylonitrile fiber;

[0042] S2: 20g of organic cotton fiber was immersed in 100g of butyl methacrylate, 5g of modified nano-titanium dioxide particles was added and stirred uniformly, 1g of AIBN was added, heated to 85℃ for 1h, washed, and dried to obtain modified organic cotton fiber;

[0043] S3: 40g of modified polyacrylonitrile fiber was immersed in a 20g / L sodium hydroxide solution for 30min, taken out and dried at 60℃ for 2h, and then mixed with 100g of modified organic cotton fiber for spinning, weaving, and obtaining a fabric with a grammage of 150g / m 2 , weaving, and obtaining a fabric with a grammage of 150g / m 2 , and heat treating at 70℃ for 1h to obtain an organic cotton blended fabric.

[0044] Example 2: Preparation process of a high-hygroscopic organic cotton blended fabric: S1: 10g of polyacrylonitrile powder was added to 100g of N,N-dimethylformamide, heated to 60℃ and stirred uniformly, 8g of modified nano-silver carbon fiber was added after being cut into 3mm short carbon fibers, and the mixture was stirred uniformly. After the mixed solution was degassed, spinning was carried out, and after passing through the coagulation bath, drying was carried out to obtain modified polyacrylonitrile fiber;

[0045] S2: 20g of organic cotton fiber was immersed in 100g of butyl methacrylate, 8g of modified nano-titanium dioxide particles was added and stirred uniformly, 2g of AIBN was added, heated to 85℃ for 1h, washed, and dried to obtain modified organic cotton fiber;

[0046] S3: 60g of modified polyacrylonitrile fiber was immersed in a 20g / L sodium hydroxide solution for 30min, taken out and dried at 60℃ for 2h, and then mixed with 100g of modified organic cotton fiber for spinning, weaving, and obtaining a fabric with a grammage of 150g / m 2 , and heat treating at 70℃ for 1h to obtain an organic cotton blended fabric.

[0047] Example 3: A preparation process of a high moisture absorption organic cotton blended fabric: S1: 10g of polyacrylonitrile powder is added to 100g of N,N-dimethylformamide, heated to 60°C and stirred until uniform, 10g of modified nano-silver carbon fiber cut into 3mm short carbon fibers is added and stirred until uniform, the mixed solution is degassed and then spun, after passing through the coagulation bath, dried to obtain modified polyacrylonitrile fiber;

[0048] S2: 20g of organic cotton fiber is immersed in 100g of butyl methacrylate, 15g of modified nano-titanium dioxide particles are added and stirred until uniform, 5g of AIBN is added, heated to 85°C and reacted for 1h, washed and dried to obtain modified organic cotton fiber;

[0049] S3: 80g of modified polyacrylonitrile fiber is immersed in a 20g / L concentration of sodium hydroxide solution for 30min, taken out and dried at 60°C for 2h, then mixed with 100g of modified organic cotton fiber to spin, woven, and the grammage is 150g / m 2 , heat treated at 70°C for 1h to obtain an organic cotton blended fabric.

[0050] Comparative Example 1: A preparation process of a high moisture absorption organic cotton blended fabric: The modified nano-silver carbon fiber is prepared as follows: 32g of graphene is ultrasonically dispersed in deionized water, 15g of γ-glycidoxypropyltrimethoxysilane, 20g of N-aminoethyl-γ-aminopropyltrimethoxysilane and γ-mercaptopropyltrimethoxysilane 20g are ultrasonically dispersed until uniform, heated to 180°C and reacted for 4h, freeze-dried, and pulverized to obtain graphene aerogel powder;

[0051] 10g of silver nitrate and 20g of polyacrylonitrile powder are added to 150ml of N,N-dimethylformamide, heated to 60°C and stirred until completely dissolved, electrospun, heated at a rate of 3°C / min to 145°C and held for 30min, then heated at a rate of 2°C / min to 195°C and held for 30min, finally heated at a rate of 1°C / min to 280°C and held for 30min for pre-oxidation treatment, calcined at 600°C for 2h in a nitrogen atmosphere to obtain nano-silver carbon fiber;

[0052] 20g of nano-silver carbon fiber and 10g of 3-chloropropynyl are added to 150ml of N,N-dimethylformamide, 5g of potassium carbonate is added and stirred for 2h, washed and dried to obtain grafted nano-silver carbon fiber; 20g of graphene aerogel powder and 10g of grafted nano-silver carbon fiber are added to 200ml of N,N-dimethylformamide, 3.5g of N,N-dimethylpropionamide is added and reacted under light to obtain modified nano-silver carbon fiber;

[0053] The remaining steps are the same as in Example 1.

[0054] Comparative Example 2: Preparation process of a high moisture absorption organic cotton blended fabric: the modified nano-silver carbon fiber is prepared as follows: 32 g of graphene is ultrasonically dispersed in deionized water, 15 g of γ-glycidyl ether propyltrimethoxysilane, 20 g of N-aminoethyl-γ-aminopropyltrimethoxysilane and γ-mercaptopropyltrimethoxysilane 20 g are uniformly ultrasonically dispersed, heated to 180°C and reacted for 4 h, freeze-dried, pulverized, and graphene aerogel powder is obtained;

[0055] 10 g of silver nitrate and 20 g of polyacrylonitrile powder are added to 150 mL of N,N-dimethylformamide, heated to 60°C and stirred until completely dissolved, electrospun, heated at a rate of 3°C / min to 145°C for 30 min, then heated at a rate of 2°C / min to 195°C for 30 min, and finally heated at a rate of 1°C / min to 280°C for 30 min for pre-oxidation treatment, calcined at 900°C for 2 h in a nitrogen atmosphere to obtain nano-silver carbon fiber;

[0056] 20 g of nano-silver carbon fiber and 10 g of 3-chloropropargyl are added to 150 mL of N,N-dimethylformamide, 5 g of potassium carbonate is added and stirred for 2 h, washed and dried to obtain grafted nano-silver carbon fiber; 20 g of graphene aerogel powder and 10 g of grafted nano-silver carbon fiber are added to 200 mL of N,N-dimethylformamide, 3.5 g of N,N-dimethylpropionamide is added and reacted under light to obtain modified nano-silver carbon fiber

[0057] The remaining steps are the same as in Example 1.

[0058] Comparative Example 3: Preparation process of a high moisture absorption organic cotton blended fabric: the modified nano-silver carbon fiber is prepared as follows: 32 g of graphene is ultrasonically dispersed in deionized water, 15 g of γ-glycidyl ether propyltrimethoxysilane, 20 g of N-aminoethyl-γ-aminopropyltrimethoxysilane and γ-mercaptopropyltrimethoxysilane 20 g are uniformly ultrasonically dispersed, heated to 180°C and reacted for 4 h, freeze-dried, pulverized, and graphene aerogel powder is obtained;

[0059] 10 g of silver nitrate and 20 g of polyacrylonitrile powder are added to 150 mL of N,N-dimethylformamide, heated to 60°C and stirred until completely dissolved, electrospun, heated at a rate of 4°C / min to 145°C for 30 min, then heated at a rate of 3°C / min to 195°C for 30 min, and finally heated at a rate of 2°C / min to 280°C for 30 min for pre-oxidation treatment, calcined at 700°C for 2 h in a nitrogen atmosphere to obtain nano-silver carbon fiber;

[0060] 20 g of nanosilver carbon fiber and 10 g of 3-chloropropynyl were added to 150 mL of N,N-dimethylformamide, 5 g of potassium carbonate was added and stirred for 2 h, washed, dried to obtain grafted nanosilver carbon fiber; 20 g of graphene aerogel powder and 10 g of grafted nanosilver carbon fiber were added to 200 mL of N,N-dimethylformamide, 3.5 g of N,N-dimethylpropionamide was added and reacted under light to obtain modified nanosilver carbon fiber;

[0061] The remaining steps are the same as in Example 1.

[0062] Comparative Example 4: A preparation process of a high-hygroscopic organic cotton blended fabric: the modified nanosilver carbon fiber was prepared as follows: 32 g of graphene was ultrasonically dispersed in deionized water, 15 g of γ-glycidyl ether propyltrimethoxysilane and 20 g of γ-mercaptopropyltrimethoxysilane were ultrasonically dispersed uniformly, heated to 180°C and reacted for 4 h, freeze-dried, and crushed to obtain graphene aerogel powder;

[0063] 10 g of silver nitrate and 20 g of polyacrylonitrile powder were added to 150 mL of N,N-dimethylformamide, heated to 60°C and stirred uniformly until completely dissolved, electrospun, heated to 145°C at a heating rate of 3°C / min and kept constant for 30 min, then heated to 195°C at a heating rate of 2°C / min and kept constant for 30 min, finally heated to 280°C at a heating rate of 1°C / min and kept constant for 30 min for pre-oxidation treatment, calcined at 700°C for 2 h in a nitrogen atmosphere to obtain nanosilver carbon fiber;

[0064] 20 g of nanosilver carbon fiber and 10 g of 3-chloropropynyl were added to 150 mL of N,N-dimethylformamide, 5 g of potassium carbonate was added and stirred for 2 h, washed, dried to obtain grafted nanosilver carbon fiber; 20 g of graphene aerogel powder and 10 g of grafted nanosilver carbon fiber were added to 200 mL of N,N-dimethylformamide, 3.5 g of N,N-dimethylpropionamide was added and reacted under light to obtain modified nanosilver carbon fiber;

[0065] The remaining steps are the same as in Example 1.

[0066] Comparative Example 5: A preparation process of a high-hygroscopic organic cotton blended fabric: the modified nanosilver carbon fiber was prepared as follows: 32 g of graphene was ultrasonically dispersed in deionized water, 15 g of γ-glycidyl ether propyltrimethoxysilane, 20 g of N-aminoethyl-γ-aminopropyltrimethoxysilane and 20 g of γ-mercaptopropyltrimethoxysilane were ultrasonically dispersed uniformly, heated to 180°C and reacted for 4 h, freeze-dried, and crushed to obtain graphene aerogel powder;

[0067] 10g silver nitrate and 20g polyvinylpyrrolidone were added into 150ml N,N-dimethylformamide, heated to 60℃ and stirred until completely dissolved, electrospun, heated to 145℃ at a heating rate of 3℃ / min, then heated to 195℃ at a heating rate of 2℃ / min and kept for 30min, finally heated to 280℃ at a heating rate of 1℃ / min and kept for 30min for pre-oxidation treatment, calcined at 700℃ for 2h in nitrogen atmosphere, to obtain nano-silver carbon fibers;

[0068] 20g nano-silver carbon fibers and 10g 3-chloropropargyl were added into 150ml N,N-dimethylformamide, 5g potassium carbonate was added and stirred for 2h, washed and dried to obtain grafted nano-silver carbon fibers; 20g graphene aerogel powder and 10g grafted nano-silver carbon fibers were added into 200ml N,N-dimethylformamide, 3.5g N,N-dimethylpropanamide was added and reacted under light to obtain modified nano-silver carbon fibers.

[0069] Test:

[0070] Moisture absorption performance test: the sample to be tested was a 10cm×10cm square fabric;

[0071] According to GB / T 12704.10 2009, the moisture permeability of the fabric was determined by a moisture permeability tester, the temperature was set to 40℃, the relative humidity was set to 90%, the cup cover was removed, placed in the test box for 1h, quickly covered with the cup cover, then placed in a silica gel dryer at room temperature for 30min, and the moisture permeability was calculated;

[0072] Breaking strength performance test: the sample to be tested was a 20cm×5cm rectangular fabric:

[0073] According to GB / T 3923.1-2013, the breaking strength test was performed at a rate of 10mm / min.

[0074] Moisture permeation amount (g / (m 2 ·d))]]> breaking strength (N / mm 2 ) Example 1 3021 60.8 Example 2 3249 63.4 Example 3 3558 65.6 Comparative Example 1 2889 58.2 Comparative Example 2 2712 57.3 Comparative Example 3 2910 55.6 Comparative Example 4 2688 59.9 Comparative Example 5 2544 53.4

[0075] Conclusion: The high moisture absorption fabric prepared in Examples 1-3 has strong moisture absorption rate and tensile strength

[0076] In Comparative Example 1, the calcination temperature was too low during the preparation of the modified nano-silver carbon fibers, which resulted in a decrease in the amount of nano-silver precipitated, a decrease in the pore inlaying ability of the nano-silver, and a decrease in the antibacterial performance and tensile strength;

[0077] In the comparative example 2, the calcination temperature is too high during the calcination of the nanosilver carbon fiber during the preparation of the modified nanosilver carbon fiber, which leads to an increase in the amount of nanosilver precipitation and an increase in the particle size of the nanosilver, which easily causes pore blockage, thereby reducing the moisture absorption performance and tensile resistance;

[0078] In the comparative example 3, the heating rate is too fast during the pre-oxidation process during the preparation of the modified nanosilver carbon fiber, which leads to incomplete oxidation inside the fiber, and the phenomenon of local over-oxidation or under-oxidation occurs, thereby reducing the tensile resistance and the antibacterial performance;

[0079] In the comparative example 4, the amino silane coupling agent is not added during the preparation of the graphene aerogel powder, which leads to a decrease in the mesoporous structure of the aerogel and a decrease in the specific surface area, thereby reducing the moisture absorption performance;

[0080] In the comparative example 5, polyvinylpyrrolidone is used to replace polyacrylonitrile during the preparation of the modified nanosilver carbon fiber, and the fibers are completely melted and bonded after high-temperature carbonization, which leads to a large mass loss after carbonization, thereby reducing the performance;

[0081] Finally, it should be noted that the above only describes the preferred embodiments of the present application and is not intended to limit the present application. Although the present application has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent replacements to some technical features. Any modification, equivalent replacement, improvement, etc. within the spirit and principles of the present application shall be included in the protection scope of the present application.

Claims

1. A preparation process of high moisture absorption organic cotton blended fabric, characterized in that: S1: silver nitrate and polyacrylonitrile powder are added into N,N-dimethylformamide, heated and stirred uniformly, electrospun, pre-oxidized, calcined in nitrogen atmosphere, and nano silver carbon fiber is obtained; S2: the nano silver carbon fiber is grafted with 3-chloropropynyl, and then graphene aerogel powder is loaded on the surface of the nano silver carbon fiber to obtain modified nano silver carbon fiber; S3: polyacrylonitrile powder is added into N,N-dimethylformamide, heated and stirred uniformly, the modified nano silver carbon fiber is cut into short fibers and added, stirred uniformly, and the mixed solution is spun to obtain modified polyacrylonitrile fiber; S4: organic cotton fiber is immersed in butyl methacrylate, modified nano titanium dioxide particles are added and stirred uniformly, an initiator is added, heated and reacted, washed, and dried to obtain modified organic cotton fiber; S5: the modified polyacrylonitrile fiber is mixed with the modified organic cotton fiber after alkali treatment, and then spun, woven and heat treated to obtain the organic cotton blended fabric. In the modified polyacrylonitrile fiber, the polyacrylonitrile powder is 10-20 parts, the N,N-dimethylformamide is 80-100 parts, and the modified nano silver carbon fiber is 5-10 parts by mass fraction. In the modified organic cotton fiber, the organic cotton fiber is 20-30 parts, the butyl methacrylate is 80-100 parts, the modified nano titanium dioxide particles are 5-15 parts, and the initiator is 1-5 parts by mass fraction; the initiator is one of azobisisobutyronitrile and ammonium persulfate. In the organic cotton blended fabric, the modified polyacrylonitrile fiber is 40-80 parts, and the modified organic cotton fiber is 50-100 parts. In step S2, the modified nano silver carbon fiber is prepared as follows: The nano silver carbon fiber and 3-chloropropynyl are added into N,N-dimethylformamide, potassium carbonate is added and stirred to react, washed, and dried to obtain grafted nano silver carbon fiber; graphene aerogel powder and grafted nano silver carbon fiber are added into N,N-dimethylformamide, N,N-dimethylpropionamide is added and reacted under light to obtain modified nano silver carbon fiber.

2. The preparation process of the high hygroscopic organic cotton blended fabric according to claim 1, characterized in that: The mass ratio of nano silver carbon fiber to 3-chloropropynyl is (2-3):1; the mass ratio of graphene aerogel powder to grafted nano silver carbon fiber is (1-2):

1.

3. The process for preparing a high moisture absorbent organic cotton blended fabric as claimed in claim 1, wherein: The graphene aerogel powder is prepared as follows:

4. The process for preparing a high moisture absorbent organic cotton blended fabric according to claim 1, characterized in that: Graphene is activated and ultrasonically dispersed in deionized water, silane coupling agent is added and ultrasonically dispersed uniformly, heated and reacted, freeze-dried, and pulverized to obtain graphene aerogel powder; 5. The process for preparing a high moisture absorbent organic cotton blended fabric as claimed in claim 1, wherein: The silane coupling agent is N-aminoethyl-γ-aminopropyltrimethoxysilane, γ-glycidyl ether oxypropyltrimethoxysilane, and γ-mercaptopropyltrimethoxysilane; The mass ratio of graphene to γ-glycidyl ether oxypropyltrimethoxysilane to N-aminoethyl-γ-aminopropyltrimethoxysilane to γ-mercaptopropyltrimethoxysilane is 32:15:(20-30):20; The activation treatment is that the graphene is soaked in 5wt% methanesulfonic acid solution for 30-45 min.

6. The process for preparing a high moisture absorbent organic cotton blended fabric as claimed in claim 5, wherein the process further comprises of the steps of: ​ 7. The process as claimed in claim 5, wherein the process for preparing the high moisture absorbent organic cotton blended fabric is characterized by: ​ ​ ​ ​ ​ 8. The process for preparing a high moisture absorbent organic cotton blended fabric as claimed in claim 1, wherein: In step S1, the mass ratio of silver nitrate to polyacrylonitrile is 1: (1-3); the specific operation of the pre-oxidation is as follows: heating to 140-150℃ at a heating rate of 3±0.5℃ / min, keeping constant temperature for 30-45min, then heating to 190-200℃ at a heating rate of 2±0.5℃ / min, keeping constant temperature for 30-45min, finally heating to 280℃ at a heating rate of 1±0.5℃ / min, keeping constant temperature for 30-45min; the calcination temperature is 700-800℃, and the time is 1-3h.

9. The process for preparing a high moisture absorbent organic cotton blended fabric as claimed in claim 1, wherein: In step S2, the modified nano-titanium dioxide particles are silane coupling agent modified nano-titanium dioxide particles; in step S3, the temperature of the heat treatment is 60-80℃, and the time is 1-2h.

10. An organic cotton blended fabric prepared by the preparation process of any one of claims 1-9.