Lightweight warm-keeping comfortable garment material and preparation method thereof

Abstract

The invention discloses a light warm-keeping comfortable garment fabric and a preparation method thereof, and belongs to the technical field of textile fabrics. Through the content ratio of various fibers, the synergistic effect among the materials and reasonable compatibility design, on the basis of meeting the warm keeping performance of the fabric, the mass per unit area of the warm keeping fabric is reduced, the purposes of light weight and high efficiency are achieved, and meanwhile the comfort and warm keeping performance of the fabric are improved; the modified graphene oxide can be firmly attached to the surface of the fabric by reacting with the pretreated fabric gray fabric, so that the fabric is not easy to peel off from the surface of the fabric after being cleaned for multiple times, and the fabric can keep excellent warm-keeping, antistatic and antibacterial effects for a long time.

Description

Technical Field

[0001] The invention relates to the technical field of textile fabrics, and in particular to a lightweight, warm and comfortable clothing fabric and a preparation method thereof. Background Art

[0002] In winter, people usually wear thicker clothes to keep warm. However, wearing a lot of thick clothes is not only unsightly, but also less comfortable and sometimes causes inconvenience to movement. With the continuous improvement of people's living standards, higher requirements are placed on the comfort and warmth of clothing.

[0003] Chinese patent document CN117822185A discloses a lightweight thermal insulation fabric and a preparation method thereof, comprising the following steps: A. Weaving grey fabric using the five-step weaving method; B. Performing boiling and bleaching treatment, washing water treatment, neutralization treatment and dyeing treatment on the grey fabric in sequence to obtain dyed grey fabric; C. Performing water washing and drying treatment, shaping and softening treatment and blank heating treatment on the dyed grey fabric in sequence to obtain an intermediate grey fabric; D. Performing a napping treatment on the intermediate grey fabric to form fluff on the surface of the intermediate grey fabric to obtain a lightweight thermal insulation fabric; wherein the specific method of the napping treatment is to perform multiple fleece treatments on the intermediate grey fabric using a fleece raising machine, the fleece tension during the fleece treatment is 10 to 20 N, and the fleece speed is 15 to 20 m / min. The invention proposes a method for preparing a lightweight thermal insulation fabric, which has simple steps and strong operability, ensuring that the obtained lightweight thermal insulation fabric has a lower gram weight and higher warmth retention, meeting the use requirements of the product. Although the fabric obtained by this method solves the problem of light weight and warmth retention, this method forms fluff on the surface of the fabric, which is prone to static electricity in the dry autumn and winter, causing physical discomfort. Summary of the invention

[0004] The main purpose of the invention is to provide a lightweight, warm and comfortable clothing fabric and a preparation method thereof. The clothing fabric not only has lightweight, warm and comfortable functions, but also has good antistatic and antibacterial properties.

[0005] To achieve the above object, the present invention provides a method for preparing a lightweight, warm and comfortable clothing fabric, comprising the following steps: S1: mixing cotton fiber, hemp fiber and bamboo fiber uniformly to obtain a premix; S2 weaves the premix under the condition of 60-80Nm / 2 strands to obtain a fabric grey cloth; S3: stirring and mixing the amino-containing silane coupling agent and the ethanol aqueous solution to obtain a pre-impregnation liquid; then placing the fabric in the pre-impregnation liquid for immersion, and then taking it out and drying it to obtain the pre-treated fabric; S4: evenly coating the finishing agent on the surface of the pretreated fabric grey cloth, and obtaining the lightweight, warm and comfortable clothing fabric after thermal curing.

[0006] Preferably, in step S1, the mass ratio of cotton fiber, hemp fiber and bamboo fiber is 3-5:2-3:1.

[0007] Preferably, the concentration of the ethanol aqueous solution in step S3 is 40-60wt%, and the amount of the amino-containing silane coupling agent added is 3-5% of the ethanol aqueous solution.

[0008] Preferably, the finishing agent in step S4 comprises the following components in parts by weight: 5-10 parts of modified graphene, 20-30 parts of penetrant, 40-60 parts of water-based polyurethane, 5-10 parts of softener, and 50-100 parts of water.

[0009] Further preferably, the preparation method of the modified graphene oxide is as follows: 1) Ultrasonic dispersion of aluminum hydroxide and graphene oxide in water to obtain a dispersion; transfer the dispersion to a polytetrafluoroethylene-lined high-pressure reactor for hydrothermal treatment, cool to room temperature after the reaction is completed, filter to obtain a gel-like substance, freeze-dry the gel-like substance, and then vacuum sublimate to obtain graphene oxide aerogel; 2) adding ammonia water to the dopamine hydrochloride aqueous solution, stirring evenly, then adding graphene oxide aerogel thereto, heating for reaction, cooling and filtering, collecting and drying the solids to obtain polydopamine-coated graphene oxide aerogel; 3) dispersing the polydopamine-coated graphene oxide aerogel in an aqueous solution of sodium dodecyl sulfate, adding an aqueous NaOH solution to adjust the pH value, adding carboxymethyl chitosan, and heating for reaction; after the reaction is completed, cooling, filtering, and collecting the solid, washing the solid until the pH value of the filtrate is neutral, and then drying to obtain the modified graphene oxide.

[0010] Preferably, in step 1), the dosage ratio of aluminum hydroxide to graphene oxide is 1-3:3-5; the hydrothermal temperature is 160-200° C., and the hydrothermal reaction time is 10-12 h.

[0011] Preferably, in step 2), the concentration of the dopamine hydrochloride aqueous solution is 20-30wt%, and the amount of graphene oxide aerogel added is 5-10% of the mass of the dopamine hydrochloride aqueous solution.

[0012] Preferably, in step 3), the mass ratio of polydopamine-coated graphene oxide aerogel to carboxymethyl chitosan is 4-6:1-3.

[0013] Preferably, the penetrant in step S4 is a mixture of one or more of cetrimonium bromide, polypyrrolidone, and fatty alcohol polyoxyethylene ether.

[0014] Preferably, the softener in step S4 is one or more of ethylene glycol, triethanolamine, glycerol, and polyethylene glycol glycidyl ether.

[0015] Preferably, the coating amount of the finishing agent in step S4 is 40-60 g / m 2 .

[0016] Preferably, in step S4, the heat curing temperature is 50-60° C., and the heat curing time is 2-3 hours.

[0017] Preferably, the preparation method of the finishing agent in step S4 is as follows: adding waterborne polyurethane and penetrant into water, stirring evenly, then adding modified graphene oxide, dispersing evenly, and finally adding softener, stirring evenly, to obtain the finishing agent.

[0018] Compared with the prior art, the present invention has the following beneficial effects: 1. The present invention uses various fiber content ratios to give play to the synergistic effect between materials and reasonable compatibility design. On the basis of meeting the thermal insulation performance of the fabric, the unit area mass of the thermal insulation fabric is reduced to achieve the purpose of light weight and high efficiency, while improving the comfort and thermal insulation of the fabric; 2. The present invention adds graphene oxide aerogel to the finishing agent. Firstly, due to the low thermal conductivity and high porosity of graphene aerogel, it can effectively block heat transfer and give the fabric lightness and thermal insulation. The improvement of thermal insulation performance can achieve better thermal insulation effect. The hydrated aluminum oxide is fixed in the graphene oxide aerogel by hydrothermal treatment and then freeze-drying, which can play a skeletal support role for the aerogel and is not easy to break. Secondly, graphene oxide itself has excellent conductive properties and is easy to form a conductive network on the surface of the fabric, which can quickly disperse the charge on the surface of the fabric, thereby improving the antistatic performance of the fabric. However, the combination of graphene oxide and the fabric is not firm and easy to fall off. On the other hand, the dispersion of graphene oxide is uneven, resulting in weak antistatic performance of the fabric. By in-situ polymerization on graphene oxide aerogel to generate polydopamine, the affinity between graphene oxide and fiber is improved, and active groups are provided, which is beneficial to subsequent reactions and improves the antistatic properties of the fabric; by grafting hydrophilic chitosan on polydopamine-coated graphene oxide, the hygroscopicity of the fabric is enhanced, and a thin moisture conductive layer can be formed on the surface of the fabric, forming a moisture channel from the inside to the surface, which can accelerate the dissipation of charge, further improve the antistatic properties of the fabric, and also give the fabric certain antibacterial properties.

[0019] 3. The present invention introduces biocompatible polydopamine and chitosan on the surface of graphene oxide, which is beneficial to improve the affinity between the fabric and the skin, thereby improving the skin-friendliness of the fabric. The modified graphene oxide of the present invention can firmly adhere to the surface of the fabric by reacting with the pretreated fabric grey cloth, so that the fabric will not be easily peeled off from the surface of the fabric after multiple washings, so that the fabric can maintain excellent warmth retention, antistatic and antibacterial effects for a long time. DETAILED DESCRIPTION

[0020] To make the purpose, technical scheme and advantages of the embodiment of the present invention clearer, the technical scheme in the embodiment of the present invention will be described clearly and completely below. If the specific conditions are not specified in the embodiment, it is carried out according to the normal conditions or the conditions recommended by the manufacturer. If the reagents or instruments used do not specify the manufacturer, they are all conventional products that can be purchased commercially. In addition, the meaning of "and / or" appearing in the full text includes three parallel schemes, taking "A and / or B" as an example, including scheme A, or scheme B, or schemes that A and B meet at the same time. In addition, the technical schemes between the various embodiments can be combined with each other, but must be based on the ability of ordinary technicians in the field to achieve. When the combination of technical solutions is contradictory or cannot be achieved, it should be considered that the combination of such technical solutions does not exist, and is not within the scope of protection required by the present invention. Based on the embodiments in the present invention, all other embodiments obtained by ordinary technicians in the field without making creative work belong to the scope of protection of the present invention.

[0021] The sources of some raw materials used in the present invention are as follows: Graphene oxide, model SY-GO-S, particle size <5 μm, was purchased from Beijing Meiston Technology Development Co., Ltd.

[0022] Aluminum hydroxide, brand AH-1, was purchased from Zibo Yisheng Aluminum Co., Ltd.

[0023] Carboxymethyl chitosan, with a carboxylation degree of 80%, was purchased from Shanghai Zhongfeng Biotechnology Co., Ltd.

[0024] Example 1

[0025] A method for preparing a lightweight, warm and comfortable clothing fabric comprises the following steps: S1: 80 g of cotton fiber, 50 g of hemp fiber, and 20 g of bamboo fiber are mixed evenly to obtain a premix; S2 weaves the premix under the condition of 70 Nm / 2 strands to obtain a fabric grey cloth; S3: 80 g of KH550 silane coupling agent and 2000 mL of 50 wt% ethanol aqueous solution were stirred and mixed to obtain a pre-impregnation liquid; then the fabric was placed in the pre-impregnation liquid for 2 hours, and then taken out and dried to obtain the pre-treated fabric; S4 evenly applies the finishing agent to the surface of the pretreated fabric, and the coating amount of the finishing agent is 50g / m 2, after heat curing at 50° C. for 2 hours, the lightweight, warm and comfortable clothing fabric is obtained; the preparation method of the finishing agent is as follows: 50 g of waterborne polyurethane and 26.3 g of polypyrrolidone are added to 80 g of water, stirred evenly, then 8 g of modified graphene oxide is added, dispersed evenly, and finally 7.5 g of propylene glycol is added, stirred evenly, and the finishing agent is obtained.

[0026] The preparation method of the modified graphene oxide is as follows: 1) Ultrasonic dispersion of 20 g aluminum hydroxide and 80 g graphene oxide in 500 mL water to obtain a dispersion; transfer the dispersion to a polytetrafluoroethylene-lined autoclave for hydrothermal treatment at a temperature of 180° C. for 12 h; after the reaction is completed, the dispersion is cooled to room temperature and filtered to obtain a gel-like substance; the gel-like substance is freeze-dried at -40° C. for 24 h, and then vacuum sublimated at 30° C. to obtain graphene oxide aerogel; 2) Add 8 mL of 28 wt% ammonia water to 80 mL of 25 wt% dopamine hydrochloride aqueous solution, stir evenly, then add 8 g of graphene oxide aerogel thereto, react at 90 ° C for 4 h, cool and filter, collect the solid and dry to obtain polydopamine-coated graphene oxide aerogel; 3) 5 g of polydopamine-coated graphene oxide aerogel was dispersed in 200 mL of 10 wt% sodium dodecyl sulfate aqueous solution, 1 mol / L NaOH aqueous solution was added to adjust the pH value to 9, 2.5 g of carboxymethyl chitosan was added, and the reaction was carried out at 60 ° C for 4 h; after the reaction was completed, the solid was cooled, filtered, and collected, and the solid was washed until the pH value of the filtrate was neutral, and then dried to obtain modified graphene oxide.

[0027] Example 2

[0028] A method for preparing a lightweight, warm and comfortable clothing fabric comprises the following steps: S1: 60 g of cotton fiber, 40 g of hemp fiber, and 20 g of bamboo fiber are mixed evenly to obtain a premix; S2 weaves the premix under the condition of 60Nm / 2 strands to obtain a fabric grey cloth; S3: 60 g of KH550 silane coupling agent and 2000 mL of 60 wt% ethanol aqueous solution were stirred and mixed to obtain a pre-impregnation liquid; then the fabric grey cloth was placed in the pre-impregnation liquid for 1 hour, and then taken out and dried to obtain the pre-treated fabric grey cloth; S4 evenly applies the finishing agent to the surface of the pretreated fabric. The coating amount of the finishing agent is 40g / m 2, after heat curing at 60° C. for 3 hours, the lightweight, warm and comfortable clothing fabric is obtained; the preparation method of the finishing agent in the S4 step is as follows: 40g of waterborne polyurethane and 20g of cetrimonium bromide are added to 50g of water, stirred evenly, then 5g of modified graphene oxide is added, dispersed evenly, and finally 5g of triethanolamine is added, stirred evenly, to obtain the finishing agent.

[0029] The preparation method of the modified graphene oxide is as follows: 1) Ultrasonic dispersion of 10 g aluminum hydroxide and 30 g graphene oxide in water to obtain a dispersion; transfer the dispersion to a polytetrafluoroethylene-lined high-pressure reactor for hydrothermal treatment at a temperature of 160° C. for 10 h; after the reaction is completed, the dispersion is cooled to room temperature and filtered to obtain a gel-like substance; the gel-like substance is freeze-dried at -45° C. for 20 h, and then vacuum sublimated at 30° C. to obtain graphene oxide aerogel; 2) Add 5 mL of 25 wt% ammonia water to 100 mL of 20 wt% dopamine hydrochloride aqueous solution, stir evenly, then add 6.5 g of graphene oxide aerogel thereto, react at 80 ° C for 6 h, cool and filter, collect the solid and dry to obtain polydopamine-coated graphene oxide aerogel; 3) 4 g of polydopamine-coated graphene oxide aerogel was dispersed in 200 mL of 10 wt% sodium dodecyl sulfate aqueous solution, 1 mol / L NaOH aqueous solution was added to adjust the pH value to 10, 1 g of carboxymethyl chitosan was added, and the reaction was carried out at 60 ° C for 4 h. After the reaction was completed, the solid was cooled, filtered, and collected. The solid was washed until the pH value of the filtrate was neutral, and then dried to obtain modified graphene oxide.

[0030] Example 3

[0031] A method for preparing a lightweight, warm and comfortable clothing fabric comprises the following steps: S1: 100 g of cotton fiber, 60 g of hemp fiber, and 20 g of bamboo fiber are mixed evenly to obtain a premix; S2 weaves the premix under the condition of 80 Nm / 2 strands to obtain a fabric grey cloth; S3: 100 g of KH550 silane coupling agent and 2000 mL of 40 wt% ethanol aqueous solution are stirred and mixed to obtain a pre-impregnation liquid; then the fabric grey cloth is placed in the pre-impregnation liquid for 2 hours, and then taken out and dried to obtain the pre-treated fabric grey cloth; S4 evenly applies the finishing agent to the surface of the pretreated fabric, and the coating amount of the finishing agent is 60g / m 2, after heat curing at 50° C. for 3 hours, the lightweight, warm and comfortable clothing fabric is obtained; the preparation method of the finishing agent in the S4 step is as follows: 60g of waterborne polyurethane and 30g of fatty alcohol polyoxyethylene ether are added to 100g of water, stirred evenly, and then 10g of modified graphene oxide is added and dispersed evenly, and finally 10g of polyethylene glycol glycidyl ether is added and stirred evenly to obtain the finishing agent.

[0032] The preparation method of the modified graphene oxide is as follows: 1) Ultrasonic dispersion of 30 g aluminum hydroxide and 50 g graphene oxide in water to obtain a dispersion; transfer the dispersion to a polytetrafluoroethylene-lined high-pressure reactor for hydrothermal treatment at a temperature of 200° C. for 12 h; after the reaction is completed, the dispersion is cooled to room temperature and filtered to obtain a gel-like substance; the gel-like substance is freeze-dried at -40° C. for 20 h, and then vacuum sublimated at 40° C. to obtain graphene oxide aerogel; 2) Add 10 mL of 25 wt % ammonia water to 70 g of 30 wt % dopamine hydrochloride aqueous solution, stir evenly, then add 6 g of graphene oxide aerogel thereto, react at 100 ° C for 4 h, cool and filter, collect the solid and dry to obtain polydopamine-coated graphene oxide aerogel; 3) 6 g of polydopamine-coated graphene oxide aerogel was dispersed in 200 mL of 10 wt% sodium dodecyl sulfate aqueous solution, 1 mol / L NaOH aqueous solution was added to adjust the pH value to 8, 3 g of carboxymethyl chitosan was added, and the reaction was carried out at 60 ° C for 4 h. After the reaction was completed, the solid was cooled, filtered, and collected. The solid was washed until the pH value of the filtrate was neutral, and then dried to obtain modified graphene oxide.

[0033] Comparative Example 1 A method for preparing a lightweight, warm and comfortable clothing fabric is similar to that of Example 1, except that the modified graphene oxide used is polydopamine-coated graphene oxide aerogel, and specifically comprises the following steps: S1: 80 g of cotton fiber, 50 g of hemp fiber, and 20 g of bamboo fiber are mixed evenly to obtain a premix; S2 weaves the premix under the condition of 70 Nm / 2 strands to obtain a fabric grey cloth; S3: 80 g of KH550 silane coupling agent and 2000 mL of 50 wt% ethanol aqueous solution were stirred and mixed to obtain a pre-impregnation liquid; then the fabric was placed in the pre-impregnation liquid for 2 hours, and then taken out and dried to obtain the pre-treated fabric; S4 evenly applies the finishing agent to the surface of the pretreated fabric, and the coating amount of the finishing agent is 50g / m 2, after heat curing at 50° C. for 2 hours, the lightweight, warm and comfortable clothing fabric is obtained; the preparation method of the finishing agent is as follows: 50 g of waterborne polyurethane and 26.3 g of polypyrrolidone are added to 80 g of water, stirred evenly, then 8 g of modified graphene oxide is added, dispersed evenly, and finally 7.5 g of propylene glycol is added, stirred evenly, and the finishing agent is obtained.

[0034] The preparation method of the modified graphene oxide is as follows: 1) Ultrasonic dispersion of 20 g aluminum hydroxide and 80 g graphene oxide in 500 mL water to obtain a dispersion; transfer the dispersion to a polytetrafluoroethylene-lined autoclave for hydrothermal treatment at a temperature of 180° C. for 12 h; after the reaction is completed, the dispersion is cooled to room temperature and filtered to obtain a gel-like substance; the gel-like substance is freeze-dried at -40° C. for 24 h, and then vacuum sublimated at 30° C. to obtain graphene oxide aerogel; 2) Add 8 mL of 28 wt% ammonia water to 80 mL of 25 wt% dopamine hydrochloride aqueous solution, stir evenly, then add 8 g of graphene oxide aerogel, react at 90 ° C for 4 h, cool and filter, collect and dry the solid to obtain polydopamine-coated graphene aerogel, that is, modified graphene oxide.

[0035] Comparative Example 2 A method for preparing a lightweight, warm and comfortable clothing fabric is similar to that of Example 1, except that the modified graphene oxide used is graphene oxide aerogel, and specifically comprises the following steps: S1: 80 g of cotton fiber, 50 g of hemp fiber, and 20 g of bamboo fiber are mixed evenly to obtain a premix; S2 weaves the premix under the condition of 70 Nm / 2 strands to obtain a fabric grey cloth; S3: 80 g of KH550 silane coupling agent and 2000 mL of 50 wt% ethanol aqueous solution were stirred and mixed to obtain a pre-impregnation liquid; then the fabric was placed in the pre-impregnation liquid for 2 hours, and then taken out and dried to obtain the pre-treated fabric; S4 evenly applies the finishing agent to the surface of the pretreated fabric, and the coating amount of the finishing agent is 50g / m 2 , after heat curing at 50° C. for 2 hours, the lightweight, warm and comfortable clothing fabric is obtained; the preparation method of the finishing agent is as follows: 50 g of waterborne polyurethane and 26.3 g of polypyrrolidone are added to 80 g of water, stirred evenly, then 8 g of modified graphene oxide is added, dispersed evenly, and finally 7.5 g of propylene glycol is added, stirred evenly, and the finishing agent is obtained.

[0036] The preparation method of the modified graphene oxide is as follows: Ultrasonic dispersion of 20 g aluminum hydroxide and 80 g graphene oxide in 500 mL water to obtain a dispersion; the dispersion is transferred to a polytetrafluoroethylene-lined high-pressure reactor for hydrothermal treatment at a temperature of 180° C. for 12 h; after completion of the reaction, the dispersion is cooled to room temperature and filtered to obtain a gel-like substance; the gel-like substance is freeze-dried at -40° C. for 24 h, and then vacuum sublimated at 30° C. to obtain graphene oxide aerogel; that is, modified graphene oxide.

[0037] Comparative Example 3 A method for preparing a lightweight, warm and comfortable clothing fabric is similar to that of Example 1, except that the graphene oxide used is not modified, and specifically comprises the following steps: S1: 80 g of cotton fiber, 50 g of hemp fiber, and 20 g of bamboo fiber are mixed evenly to obtain a premix; S2 weaves the premix under the condition of 70 Nm / 2 strands to obtain a fabric grey cloth; S3: 80 g of KH550 silane coupling agent and 2000 mL of 50 wt% ethanol aqueous solution were stirred and mixed to obtain a pre-impregnation liquid; then the fabric was placed in the pre-impregnation liquid for 2 hours, and then taken out and dried to obtain the pre-treated fabric; S4 evenly applies the finishing agent to the surface of the pretreated fabric, and the coating amount of the finishing agent is 50g / m 2 After heat curing at 50°C for 2h, the lightweight, warm and comfortable clothing fabric is obtained; the preparation method of the finishing agent is as follows: 50g of waterborne polyurethane and 26.3g of polypyrrolidone are added to 80g of water, stirred evenly, then 8g of graphene oxide is added, dispersed evenly, and finally 7.5g of propylene glycol is added, stirred evenly, and the finishing agent is obtained.

[0038] Test Case Antistatic performance test: The lightweight, warm and comfortable clothing fabrics prepared in Examples 1-3 and Comparative Examples 1-3 were washed 10 times with standard water and then subjected to performance tests. The standard washing method was as follows: the standard detergent dosage was 2 g / L, the washing condition was 40°C, the washing was performed in a household washing machine, 5 minutes per wash, and the clothes were dried in an oven at 60°C, for a total of 10 washes. The surface charge density test was performed using the C method (surface charge density method) in the national standard GB / T12703-1991 "Textile Electrostatic Test Method". The experimental results are shown in Table 1: Table 1 Test results of antistatic properties of fabrics

[0039] Antibacterial performance test: With reference to the simplified washing conditions and procedures of FZ / T73023-2006 "Antibacterial Knitwear", the standard detergent concentration used was 2 g / L. The fabrics obtained in Example 1 and Comparative Examples 1-3 were washed in a constant temperature oscillating water bath at 40°C for 5 min and then rinsed with distilled water. This process was regarded as one wash. According to the above procedure, the lightweight, warm and comfortable clothing fabrics were washed 100 times, and the antibacterial properties of the washed fabrics were tested.

[0040] The antibacterial performance of washed fabrics was tested with reference to the provisions of GB / T 20944.3-2008 "Evaluation of Antibacterial Performance of Textiles Part 3: Oscillation Method", with Escherichia coli ATCC 8099, Candida albicans ATCC 10231 and Staphylococcus aureus ATCC 6538 as test strains. In a sterile environment, appropriate amounts of the above three strains were placed in 20 mL of broth sterilized at high temperature to prepare a bacterial culture solution of 3×105 cfu / mL. 4 g of fabric samples obtained in Example 1 and Comparative Examples 1-3 were weighed, and the samples were cut into pieces of about 5×5 mm and placed in the corresponding bacterial culture solution. In the experiment, the bacterial culture solution without the sample was used as the control group. The broth was placed in a constant temperature shaker, set at 37°C, with a rotation speed of 150 rpm, and cultured for 24 hours. 100 μL was spread on an agar culture dish. After 4 hours of culture, the number of bacteria on the culture dish was recorded by plate count method. Each sample was tested in three groups and the average value was taken. The test results are shown in Table 2. The antibacterial property of fabric can be calculated using the following formula: R=(BA) / B×100% Where R represents the antibacterial rate, A and B are the bacterial concentrations of the sample and the control group, respectively.

[0041] The test results are shown in Table 2: Table 2 Antibacterial performance test results of fabrics after washing 100 times

[0042] It can be seen from the table that the fabric prepared in the present application still has good antibacterial properties after washing 100 times. It can be seen that the antibacterial finishing agent is well combined with the base fabric and has the characteristics of a long antibacterial cycle.

[0043] The above are only preferred embodiments of the present invention, and do not limit the patent scope of the present invention. For those skilled in the art, the present invention may have various changes and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the patent protection scope of the present invention.

Claims

1. A method for preparing a lightweight, warm and comfortable clothing fabric, characterized in that: The method comprises the following steps: S1, mixing cotton fiber, hemp fiber and bamboo fiber uniformly to obtain a premix; S2 weaves the premix under the condition of 60-80Nm / 2 strands to obtain a fabric grey cloth; S3: stirring and mixing the amino-containing silane coupling agent and the ethanol aqueous solution to obtain a pre-impregnation liquid; then placing the fabric in the pre-impregnation liquid for immersion, and then taking it out and drying it to obtain the pre-treated fabric; S4: evenly coating the finishing agent on the surface of the pretreated fabric grey cloth, and obtaining the lightweight, warm and comfortable clothing fabric after thermal curing.

2. The preparation method according to claim 1, characterized in that: In the step S1, the mass ratio of cotton fiber, hemp fiber and bamboo fiber is 3-5:2-3:

1.

3. The preparation method according to claim 1, characterized in that: The finishing agent in step S4 includes the following components in parts by weight: 5-10 parts of modified graphene oxide, 20-30 parts of penetrant, 40-60 parts of water-based polyurethane, 5-10 parts of softener, and 50-100 parts of water.

4. The preparation method according to claim 3, characterized in that: The preparation method of the modified graphene oxide is as follows: 1) Ultrasonic dispersion of aluminum hydroxide and graphene oxide in water to obtain a dispersion; transfer the dispersion to a polytetrafluoroethylene-lined high-pressure reactor for hydrothermal treatment, cool to room temperature after the reaction is completed, filter to obtain a gel-like substance, freeze-dry the gel-like substance, and then vacuum sublimate to obtain graphene oxide aerogel; 2) adding ammonia water to the dopamine hydrochloride aqueous solution, stirring evenly, then adding graphene oxide aerogel thereto, heating for reaction, cooling and filtering, collecting and drying the solids to obtain polydopamine-coated graphene oxide aerogel; 3) dispersing the polydopamine-coated graphene oxide aerogel in an aqueous solution of sodium dodecyl sulfate, adding an aqueous NaOH solution to adjust the pH value, adding carboxymethyl chitosan, and heating for reaction; after the reaction is completed, cooling, filtering, and collecting the solid, washing the solid until the pH value of the filtrate is neutral, and then drying to obtain the modified graphene oxide.

5. The preparation method according to claim 4, characterized in that: In the step 1), the dosage ratio of aluminum hydroxide to graphene oxide is 1-3:3-5; the hydrothermal temperature is 160-200° C., and the hydrothermal reaction time is 10-12 hours.

6. The preparation method according to claim 4, characterized in that: In the step 2), the concentration of the dopamine hydrochloride aqueous solution is 20-30wt%, and the amount of graphene oxide aerogel added is 5-10% of the mass of the dopamine hydrochloride aqueous solution.

7. The preparation method according to claim 4, characterized in that: In the step 3), the mass ratio of polydopamine-coated graphene oxide aerogel to carboxymethyl chitosan is 4-6:1-3.

8. The preparation method according to claim 1, characterized in that: The coating amount of the finishing agent in step S4 is 40-60 g / m 2 .

9. The preparation method according to claim 1, characterized in that: In step S4, the heat curing temperature is 50-60° C., and the heat curing time is 2-3 hours.

10. A lightweight, warm and comfortable clothing fabric, characterized by: The compound is prepared by the preparation method according to any one of claims 1 to 9.

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