Processing technology of antibacterial and breathable fabric and clothing applied by the processing technology

Abstract

The application discloses a processing technology of antibacterial and breathable fabric and clothes applying the same, and relates to the technical field of clothes fabric.The processing technology of the antibacterial and breathable fabric comprises the following steps: sequentially performing alkali heat treatment and bleaching treatment on cotton textile fabric, immersing the cotton textile fabric in a citric acid solution, adjusting pH, washing, extruding, and airing at room temperature to obtain pretreated cotton textile fabric; immersing and padding the pretreated cotton textile fabric in a chitosan emulsion, drying at 50-52 DEG C when the moisture absorption rate reaches 85-90%, immersing the fabric in a carboxybetaine derivative solution for 18-24 hours after the drying treatment, washing, and drying to obtain moisture absorption and antibacterial cotton textile fabric; taking functional fiber leather as an upper surface layer, taking the moisture absorption and antibacterial cotton textile fabric as a lower surface layer, and taking an EVA hot melt net as an adhesive sandwiched between the two layers, and then performing hot pressing and compounding to obtain the antibacterial and breathable fabric.

Description

Technical Field

[0001] This invention relates to the field of apparel fabric technology, specifically to a processing technology for an antibacterial and breathable fabric and its application in apparel. Background Technology

[0002] In today's textile and apparel industry, consumers have increasingly diversified demands for clothing, no longer satisfied with just aesthetics and comfort, but also paying more attention to functionality and safety. Traditional fabrics have revealed numerous problems during use, making the development of fabrics with special functions an important direction for the industry's development.

[0003] From an antibacterial perspective, ordinary fabrics easily become breeding grounds for bacteria. During daily wear, the human body secretes sweat, oils, and other substances, providing abundant nutrients for bacterial growth. When bacteria multiply rapidly on fabric, they not only produce unpleasant odors, affecting the wearing experience, but may also cause skin diseases, posing a threat to human health. This is especially true for certain groups, such as children, the elderly, and those with weakened immune systems, who are at higher risk of bacterial infections. While some existing antibacterial fabrics can inhibit bacterial growth to a certain extent, the antibacterial effect is often not long-lasting, and its antibacterial performance decreases significantly with each wash. Furthermore, some antibacterial treatment methods may use chemicals harmful to the human body, introducing new health risks while meeting antibacterial requirements.

[0004] Traditional fabrics also have significant shortcomings in breathability. Many fabrics have poor breathability, causing sweat to accumulate on the skin, making people feel stuffy and damp, greatly reducing wearing comfort. This is especially true during exercise or in high-temperature environments, where non-breathable fabrics can cause even greater discomfort and may even affect normal physiological functions. Fabrics made with tightly woven fabrics for aesthetic purposes have even more pronounced breathability issues. Furthermore, existing breathable fabrics struggle to balance other performance characteristics; for example, they often fail to provide adequate waterproofing and windproofing while maintaining breathability.

[0005] Furthermore, with changing lifestyles and increased outdoor activities, the demand for clothing with antibacterial and breathable functions is becoming increasingly urgent. In fields such as medical care, sports, and outdoor work, higher requirements are being placed on the antibacterial and breathable properties of clothing. However, currently, there are relatively few fabrics and garments made from them on the market that simultaneously meet the requirements of antibacterial and breathability while maintaining stable performance, safety, and environmental friendliness. Therefore, developing a processing technology for antibacterial and breathable fabrics and applying it to various types of clothing has significant practical implications and broad market prospects. Summary of the Invention

[0006] The purpose of this invention is to provide a processing technology for antibacterial and breathable fabrics and the application of this technology in clothing, in order to solve the problems raised in the prior art.

[0007] To achieve the above objectives, the present invention provides the following technical solution:

[0008] A processing technology for an antibacterial and breathable fabric includes the following steps: S1: Triethylamine is added to deionized water, heated to 80-82℃, stirred evenly, and then hexadecyltrimethylammonium bromide and sodium lignosulfonate are added. The mixture is kept warm and stirred for 1-1.5 hours. A composite precursor solution is added, and the reaction is kept warm for 4-4.5 hours. The product is washed alternately with ethanol and deionized water, freeze-dried, and then added to deionized water to obtain an aqueous dispersion.

[0009] Furthermore, during the preparation of the aqueous dispersion, 0.06 g of cetyltrimethylammonium bromide, 0.24 g of sodium lignosulfonate, and 200 μL of triethylamine are added to every 7 mL of the composite precursor solution;

[0010] Furthermore, the preparation method of the composite precursor solution includes the following steps: heating ethanol and acidic water to 40-42°C, stirring until homogeneous, adding tetraethyl silicate and 1,2-bis(triethoxysilyl)ethane, stirring until homogeneous, to obtain the composite precursor solution;

[0011] Furthermore, in the preparation of the composite precursor solution, the volume ratio of ethanol: acidic water: tetraethyl silicate: 1,2-bis(triethoxysilyl)ethane is 4.5:0.5:1:1;

[0012] Furthermore, the pH of the acidic water is 0.4;

[0013] Furthermore, the sodium lignosulfonate has a Mw of 52000;

[0014] S2: Add the aqueous dispersion to the aqueous polyurethane emulsion and disperse it ultrasonically to obtain a functional coating; immerse the fiber substrate in the functional coating, let it stand at room temperature for 5-10 minutes, take it out, and heat-treat it at 100-120℃ for 20-25 minutes through a roller to obtain functional fiber leather.

[0015] Furthermore, in the preparation process of the functional coating, the mass ratio of the aqueous dispersion to the aqueous polyurethane emulsion is (8.1-10.3):(79.7-81.9);

[0016] Furthermore, the concentration of the aqueous polyurethane emulsion is 40 wt%.

[0017] Furthermore, the fiber substrate is an island-type fiber substrate;

[0018] Furthermore, the concentration of the functional coating is 1 wt%.

[0019] S3: Add chitosan to a 2% v / v acetic acid aqueous solution and stir at room temperature to obtain a chitosan solution. Add deionized water, glycerin, and 30% v / v Tween 80 in sequence and stir at room temperature to homogenize. Add green tea tannin extract and avocado oil and stir at room temperature to homogenize to obtain a chitosan emulsion.

[0020] Furthermore, in the preparation process of the chitosan emulsion, the mass ratio of chitosan: Tween 80: glycerol: green tea tannin extract: avocado oil: deionized water is (30-50):1.67:9:(1-3):(1-3):(33.33-53.33).

[0021] Furthermore, the green tea tannin extract is prepared by heating green tea in an ethanol-water solution with a volume ratio of 1:1;

[0022] Furthermore, the avocado oil is obtained by ultrasonically treating avocado peel in ethanol;

[0023] S4: The cotton textile fabric is subjected to hot alkaline treatment in treatment bath A at 95℃ for 90 min. The cotton textile fabric is repeatedly washed for 10 min at 80℃, 60℃, 40℃ and room temperature respectively. The cotton textile fabric is heat-treated in treatment bath B at 98℃ for 60 min. It is then bleached in treatment bath C at the same temperature for 60 min. The cotton textile fabric is rinsed at 90℃, 60℃ and 40℃ for 10 min respectively. It is then washed with cold water. The cotton textile fabric is then immersed in 4 g / L citric acid solution for 20 min to adjust the pH. The fabric is then washed, squeezed and air-dried at room temperature to obtain the pretreated cotton textile fabric.

[0024] Furthermore, the treatment bath A comprises 4 mL / L sodium hydroxide solution (Baumé 38°), 3 g / L sodium carbonate solution, 3 g / L sodium phosphate solution, 2 g / L Kemapon PC solution, and 1.5 g / L Sequion solution;

[0025] Furthermore, the specifications of the cotton textile fabric are: plain weave, 168g / m². 2 ;

[0026] Furthermore, the treatment bath B comprises 4 mL / L sodium hydroxide solution (Baumé 38°), 2 g / L Kemaxil solution, and 1 g / L Kemapon PC solution;

[0027] Furthermore, the treatment bath C comprises 20 g / L hydrogen peroxide, 4 g / L sodium hydroxide solution (Baumé degree 38°), 2 g / L Kemaxi l solution, and 1 g / L Kemapon PC solution;

[0028] S5: The pretreated cotton textile fabric is immersed in chitosan emulsion. When the moisture absorption rate reaches 85-90%, it is dried at 50-52℃. After drying, the fabric is immersed in carboxybetaine derivative solution for 18-24 hours, washed, and dried to obtain moisture-absorbing and antibacterial cotton textile fabric.

[0029] Furthermore, the rolling parameters are: 2 rolling cycles, rolling speed of 1 m / min, and pressure of 0.74-0.75 bar;

[0030] Furthermore, the preparation method of the carboxybetaine derivative solution includes the following steps: adding the carboxybetaine derivative to a Tris buffer solution, adding sodium iodate, and stirring at room temperature for 18-24 hours to obtain the carboxybetaine derivative solution; during the preparation of the carboxybetaine derivative solution, the concentration of the carboxybetaine derivative buffer solution is 2 mg / mL, and the molar ratio of carboxybetaine derivative to sodium iodate is 1:2;

[0031] S6: Functional fiber leather is used as the upper surface layer, moisture-wicking and antibacterial cotton textile is used as the lower surface layer, and EVA hot melt mesh is used as an adhesive sandwiched between the two layers. The layers are then hot-pressed together to obtain an antibacterial and breathable fabric.

[0032] Furthermore, the hot-pressing composite temperature is 100-105℃, the pressure is 0.6-0.7MPa, and the time is 15-20s;

[0033] Furthermore, the preparation process of the carboxybetaine derivative includes the following steps:

[0034] Step (1): Add levodopa to acetone, stir well, add 1M sodium hydroxide solution and ditert-butyl dicarbonate under ice bath conditions, stir at room temperature for 4-5 hours, rotary evaporate, wash the product with 1M hydrochloric acid solution, deionized water and saturated sodium chloride solution, dry with anhydrous magnesium sulfate, concentrate, and obtain tert-butyloxycarbonyl levodopa.

[0035] In the preparation of tert-butyloxycarbonyl-L-DOPA, the molar ratio of L-DOPA: sodium hydroxide: ditert-butyl dicarbonate is 10:11:11.

[0036] Step (2): Add tert-butyloxycarbonyl-L-DOPA to acetonitrile solution, add tert-butyldimethylchlorosilane, stir evenly under ice bath conditions, add 1,8-diazabicyclo[5.4.0]undec-7-ene, stir at room temperature for 16-17 h, rotary evaporate, wash the product with deionized water and saturated sodium chloride solution, dry with anhydrous sulfuric acid, and purify by silica gel column chromatography to obtain compound 2;

[0037] In the preparation of compound 2, the molar ratio of tert-butyloxycarbonyl-L-DOPA: tert-butyldimethylchlorosilane: 1,8-diazabicyclo[5.4.0]undec-7-ene was 8.7:21.8:21.8;

[0038] Step (3): Compound 2 and 3-dimethylamino-1-propanol were added to dichloromethane and stirred until homogeneous. Dicyclohexylcarbodiimide and 4-dimethylaminopyridine were added and stirred at room temperature for 18-19 h. The mixture was filtered, the product was washed with hexane, and purified by silica gel column chromatography to obtain compound 3.

[0039] In the preparation of compound 3, the molar ratio of compound 2: 3-dimethylamino-1-propanol: dicyclohexylcarbodiimide: 4-dimethylaminopyridine was 5.7:6.3:6.3:6.3;

[0040] Step (4): Add compound 3 to acetonitrile, stir well, add tert-butyl bromoacetate, heat to 56-57℃ and react for 18-20 h, rotary evaporate, and purify by silica gel column chromatography to obtain compound 4;

[0041] In the preparation of compound 4, the molar ratio of compound 3 to tert-butyl bromoacetate is 2.5:3.75;

[0042] Step (5): Under ice bath conditions, tetrabutylammonium fluoride was added to the tetrahydrofuran solution of compound 4 and stirred for 3-3.5 h. The mixture was then rotary evaporated, and the product was added to dichloromethane and stirred until homogeneous. Under ice bath conditions, trifluoroacetic acid was added and reacted at room temperature for 3-3.5 h. The mixture was then rotary evaporated and purified by silica gel column chromatography to obtain the carboxybetaine derivative.

[0043] In the preparation of the carboxybetaine derivative, the molar ratio of tetrabutylammonium fluoride:compound 4:trifluoroacetic acid was 4.8:1.9:22.9.

[0044] The application of an antibacterial and breathable fabric prepared by a certain processing technology in clothing.

[0045] Compared with the prior art, the beneficial effects of the present invention are:

[0046] 1. In this invention, the carboxybetaine derivative forms a strongly hydrated layer through its zwitterionic structure (carrying both positive and negative charges). Its electrostatic interactions can disrupt the integrity of bacterial cell membranes and simultaneously hinder protein adsorption. Literature studies have shown that the hydrophilicity of the CB-DOPA coating significantly increases after oxidation with sodium iodate under alkaline conditions, further enhancing the stability of the hydrated layer through hydrogen bonding and ionic interactions, thereby inhibiting initial bacterial adhesion.

[0047] 2. In this invention, chitosan is obtained by protonating amino groups (-NH3). +The tannins in green tea bind to the negative charge of bacterial cell walls, disrupting membrane permeability; the polyphenolic compounds in green tea tannins can chelate metal ions, inhibiting the activity of bacterial metabolic enzymes. The unsaturated fatty acids in avocado oil enhance the interfacial bonding between the coating and the fiber through hydrophobic interactions, reducing the loss of antibacterial agents.

[0048] 3. The hollow structure of the dispersion in the aqueous dispersion prepared by this invention increases the free volume inside the coating, providing channels for the diffusion of water molecules and gases. The sulfonic acid groups of sodium lignin sulfonate form hydrogen bonds with the amide bonds of WPU, improving the dispersibility of the nanofiller and avoiding the decline in mechanical properties caused by particle agglomeration. In addition, the conjugated structure of lignin (benzene ring, quinone group) endows the coating with ultraviolet absorption capacity, significantly extending the outdoor service life of the fabric.

[0049] 4. This invention utilizes the polar segments of EVA to form a physical cross-linked network with WPU and cotton fibers, while the hot-pressing temperature is lower than the decomposition temperature of the aqueous dispersion, ensuring the integrity of the hollow structure. The multi-layer design balances the abrasion resistance of the surface layer with the moisture absorption and breathability of the inner layer, creating a biomimetic "rigid-flexible" structure. Detailed Implementation

[0050] 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.

[0051] In the following examples, the preparation process of the carboxybetaine derivative includes the following steps:

[0052] Step (1): Add 10 mmol of levodopa to acetone, stir well, add 1 M sodium hydroxide solution containing 11 mmol of sodium hydroxide and 11 mmol of ditert-butyl dicarbonate under ice bath conditions, stir at room temperature for 4-5 h, rotary evaporate, wash the product with 1 M hydrochloric acid solution, deionized water and saturated sodium chloride solution, dry with anhydrous magnesium sulfate, concentrate, and obtain tert-butyloxycarbonyl levodopa;

[0053] Step (2): 8.7 mmol of tert-butyloxycarbonyl-L-DOPA was added to an acetonitrile solution, followed by 21.8 mmol of tert-butyldimethylchlorosilane. The mixture was stirred evenly under ice bath conditions, and then 21.8 mmol of 1,8-diazabicyclo[5.4.0]undec-7-ene was added. The mixture was stirred at room temperature for 16 h, rotary evaporated, and the product was washed with deionized water and saturated sodium chloride solution. The product was dried over anhydrous sulfuric acid and purified by silica gel column chromatography to obtain compound 2.

[0054] Step (3): 5.7 mmol of compound 2 and 6.3 mmol of 3-dimethylamino-1-propanol were added to dichloromethane and stirred until homogeneous. Then, 6.3 mmol of dicyclohexylcarbodiimide and 6.3 mmol of 4-dimethylaminopyridine were added and stirred at room temperature for 18 h. The mixture was filtered, the product was washed with hexane, and purified by silica gel column chromatography to obtain compound 3.

[0055] Step (4): 2.5 mmol of compound 3 was added to acetonitrile, stirred evenly, 3.75 mmol of tert-butyl bromoacetate was added, heated to 56 °C and reacted for 18 h, rotary evaporated, and purified by silica gel column chromatography to obtain compound 4;

[0056] Step (5): Under ice bath conditions, 4.8 mmol of tetrabutylammonium fluoride was added to a tetrahydrofuran solution of 1.9 mmol of compound 4, stirred for 3 h, rotary evaporated, and the product was added to dichloromethane and stirred evenly. Under ice bath conditions, 22.9 mmol of trifluoroacetic acid was added, and the reaction was carried out at room temperature for 3 h. The product was then rotary evaporated and purified by silica gel column chromatography to obtain the carboxybetaine derivative.

[0057] Example 1: A processing method for an antibacterial and breathable fabric, comprising the following steps: S1: Add 200 μL of triethylamine to deionized water, heat to 80°C, stir evenly, add 0.06 g of hexadecyltrimethylammonium bromide and 0.24 g of sodium lignosulfonate, and keep warm and stir for 1 h. Add 7 mL of composite precursor solution, keep warm and react for 4 h, wash the product alternately with ethanol and deionized water, freeze dry, and add the product to deionized water to obtain an aqueous dispersion;

[0058] S2: Add 8.1g of aqueous dispersion to 81.9g of waterborne polyurethane emulsion and disperse by ultrasonication to obtain functional coating; immerse fiber substrate in functional coating, let stand at room temperature for 5min, take it out, pass it through a roller, and heat treat at 100℃ for 20min to obtain functional fiber leather.

[0059] S3: Add 50g of chitosan to a 2% v / v acetic acid aqueous solution and stir at room temperature to obtain a chitosan solution. Then add 37.33g of deionized water, 9g of glycerol, and 1.67g of 30% v / v Tween 80 in sequence and stir at room temperature to homogenize. Add 1g of green tea tannin extract and 1g of avocado oil and stir at room temperature to homogenize to obtain a chitosan emulsion.

[0060] S4: The cotton textile fabric is subjected to hot alkaline treatment in treatment bath A at 95℃ for 90 min. The cotton textile fabric is repeatedly washed for 10 min at 80℃, 60℃, 40℃ and room temperature respectively. The cotton textile fabric is heat-treated in treatment bath B at 98℃ for 60 min. It is then bleached in treatment bath C at the same temperature for 60 min. The cotton textile fabric is rinsed at 90℃, 60℃ and 40℃ for 10 min respectively. It is then washed with cold water. The cotton textile fabric is then immersed in 4 g / L citric acid solution for 20 min to adjust the pH. The fabric is then washed, squeezed and air-dried at room temperature to obtain the pretreated cotton textile fabric.

[0061] S5: The pretreated cotton textile fabric is immersed in chitosan emulsion. When the moisture absorption rate reaches 85%, it is dried at 50°C. After drying, the fabric is immersed in carboxybetaine derivative solution for 18 hours, washed, and dried to obtain moisture-absorbing and antibacterial cotton textile fabric.

[0062] S6: Functional fiber leather is used as the upper surface layer, moisture-absorbing and antibacterial cotton textile is used as the lower surface layer, and EVA hot melt mesh is used as an adhesive sandwiched between the two layers. The two layers are hot-pressed together at 100℃ and 0.6MPa for 15s to obtain an antibacterial and breathable fabric.

[0063] Example 2: A processing technology for an antibacterial and breathable fabric includes the following steps: S2: 8.1g of aqueous dispersion is added to 81.9g of water-based polyurethane emulsion and ultrasonically dispersed to obtain a functional coating; the fiber substrate is immersed in the functional coating, left to stand at room temperature for 5 minutes, taken out, and heat-treated at 100°C for 20 minutes by passing through a roller to obtain functional fiber leather.

[0064] S3: Add 50g of chitosan to a 2% v / v acetic acid aqueous solution and stir at room temperature to obtain a chitosan solution. Then add 35.33g of deionized water, 9g of glycerin, and 1.67g of 30% v / v Tween 80 in sequence and stir at room temperature to homogenize. Add 2g of green tea tannin extract and 2g of avocado oil and stir at room temperature to homogenize to obtain a chitosan emulsion.

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

[0066] Example 3: A processing technology for an antibacterial and breathable fabric includes the following steps: S2: 8.1g of aqueous dispersion is added to 81.9g of water-based polyurethane emulsion and ultrasonically dispersed to obtain a functional coating; the fiber substrate is immersed in the functional coating, left to stand at room temperature for 5 minutes, taken out, and heat-treated at 100°C for 20 minutes by passing through a roller to obtain functional fiber leather.

[0067] S3: Add 50g of chitosan to a 2% v / v acetic acid aqueous solution and stir at room temperature to obtain a chitosan solution. Then add 33.33g of deionized water, 9g of glycerol, and 1.67g of 30% v / v Tween 80 in sequence and stir at room temperature to homogenize. Add 3g of green tea tannin extract and 3g of avocado oil and stir at room temperature to homogenize to obtain a chitosan emulsion.

[0068] The remaining steps are the same as in Example 1.

[0069] Example 4: A processing technology for an antibacterial and breathable fabric includes the following steps: S2: 9.2g of aqueous dispersion is added to 80.8g of water-based polyurethane emulsion and ultrasonically dispersed to obtain a functional coating; the fiber substrate is immersed in the functional coating, left to stand at room temperature for 5 minutes, taken out, and heat-treated at 100°C for 20 minutes by passing through a roller to obtain functional fiber leather.

[0070] S3: Add 50g of chitosan to a 2% v / v acetic acid aqueous solution and stir at room temperature to obtain a chitosan solution. Then add 33.33g of deionized water, 9g of glycerol, and 1.67g of 30% v / v Tween 80 in sequence and stir at room temperature to homogenize. Add 3g of green tea tannin extract and 3g of avocado oil and stir at room temperature to homogenize to obtain a chitosan emulsion.

[0071] The remaining steps are the same as in Example 1.

[0072] Example 5: A processing technology for an antibacterial and breathable fabric includes the following steps: S2: 10.3g of aqueous dispersion is added to 7.7g of aqueous polyurethane emulsion and ultrasonically dispersed to obtain a functional coating; the fiber substrate is immersed in the functional coating, left to stand at room temperature for 5 minutes, taken out, and heat-treated at 100°C for 20 minutes by passing through a roller to obtain functional fiber leather.

[0073] S3: Add 50g of chitosan to a 2% v / v acetic acid aqueous solution and stir at room temperature to obtain a chitosan solution. Then add 33.33g of deionized water, 9g of glycerol, and 1.67g of 30% v / v Tween 80 in sequence and stir at room temperature to homogenize. Add 3g of green tea tannin extract and 3g of avocado oil and stir at room temperature to homogenize to obtain a chitosan emulsion.

[0074] The remaining steps are the same as in Example 1.

[0075] Comparative Example 1: A processing technology for an antibacterial and breathable fabric, comprising the following steps: S3: 50g of chitosan is added to a 2% v / v acetic acid aqueous solution and stirred at room temperature to obtain a chitosan solution. 31.33g of deionized water, 9g of glycerin, and 1.67g of 30% v / v Tween 80 are added sequentially and stirred at room temperature to homogenize. 4g of green tea tannin extract and 4g of avocado oil are added and stirred at room temperature to homogenize to obtain a chitosan emulsion.

[0076] The remaining steps are the same as in Example 1.

[0077] Comparative Example 2: A processing technology for an antibacterial and breathable fabric, comprising the following steps: S1: Immersing the fiber substrate in an aqueous polyurethane emulsion, letting it stand at room temperature for 5 minutes, taking it out, passing it through a roller, and heat-treating it at 100°C for 20 minutes to obtain functional fiber leather.

[0078] S2: Add 50g of chitosan to a 2% v / v acetic acid aqueous solution and stir at room temperature to obtain a chitosan solution. Then add 37.33g of deionized water, 9g of glycerol, and 1.67g of 30% v / v Tween 80 in sequence and stir at room temperature to homogenize. Add 1g of green tea tannin extract and 1g of avocado oil and stir at room temperature to homogenize to obtain a chitosan emulsion.

[0079] S3: The cotton textile fabric is subjected to hot alkaline treatment in treatment bath A at 95℃ for 90 min. The cotton textile fabric is repeatedly washed for 10 min at 80℃, 60℃, 40℃ and room temperature respectively. The cotton textile fabric is heat-treated in treatment bath B at 98℃ for 60 min. It is then bleached in treatment bath C at the same temperature for 60 min. The cotton textile fabric is rinsed at 90℃, 60℃ and 40℃ for 10 min respectively. It is then washed with cold water. The cotton textile fabric is then immersed in 4 g / L citric acid solution for 20 min to adjust the pH. The fabric is then washed, squeezed and dried at room temperature to obtain the pretreated cotton textile fabric.

[0080] S4: The pretreated cotton textile fabric is immersed in chitosan emulsion. When the moisture absorption rate reaches 85%, it is dried at 50°C. After drying, the fabric is immersed in carboxybetaine derivative solution for 18 hours, washed, and dried to obtain moisture-absorbing and antibacterial cotton textile fabric.

[0081] S5: Functional fiber leather is used as the upper surface layer, moisture-absorbing and antibacterial cotton textile is used as the lower surface layer, and EVA hot melt mesh is used as an adhesive sandwiched between the two layers. The two layers are hot-pressed together at 100℃ and 0.6MPa for 15s to obtain an antibacterial and breathable fabric.

[0082] Comparative Example 3: A processing technology for an antibacterial and breathable fabric, comprising the following steps: S1: Add 200 μL of triethylamine to deionized water, heat to 80°C, stir evenly, add 0.06 g of hexadecyltrimethylammonium bromide and 0.24 g of sodium lignosulfonate, and keep warm and stir for 1 h. Add 7 mL of composite precursor solution, keep warm and react for 4 h, wash the product alternately with ethanol and deionized water, freeze dry, and add the product to deionized water to obtain an aqueous dispersion;

[0083] S2: Add 8.1g of aqueous dispersion to 81.9g of waterborne polyurethane emulsion and disperse by ultrasonication to obtain functional coating; immerse fiber substrate in functional coating, let stand at room temperature for 5min, take it out, pass it through a roller, and heat treat at 100℃ for 20min to obtain functional fiber leather.

[0084] S3: Add 50g of chitosan to a 2% v / v acetic acid aqueous solution and stir at room temperature to obtain a chitosan solution. Then add 37.33g of deionized water, 9g of glycerol, and 1.67g of 30% v / v Tween 80 in sequence and stir at room temperature to homogenize. Add 1g of green tea tannin extract and 1g of avocado oil and stir at room temperature to homogenize to obtain a chitosan emulsion.

[0085] S4: The cotton textile fabric is subjected to hot alkaline treatment in treatment bath A at 95℃ for 90 min. The cotton textile fabric is repeatedly washed for 10 min at 80℃, 60℃, 40℃ and room temperature respectively. The cotton textile fabric is heat-treated in treatment bath B at 98℃ for 60 min. It is then bleached in treatment bath C at the same temperature for 60 min. The cotton textile fabric is rinsed at 90℃, 60℃ and 40℃ for 10 min respectively. It is then washed with cold water. The cotton textile fabric is then immersed in 4 g / L citric acid solution for 20 min to adjust the pH. The fabric is then washed, squeezed and air-dried at room temperature to obtain the pretreated cotton textile fabric.

[0086] S5: The pretreated cotton textile fabric is immersed in chitosan emulsion. When the moisture absorption rate reaches 85%, it is dried at 50°C to obtain a moisture-absorbing and antibacterial cotton textile fabric.

[0087] S6: Functional fiber leather is used as the upper surface layer, moisture-absorbing and antibacterial cotton textile is used as the lower surface layer, and EVA hot melt mesh is used as an adhesive sandwiched between the two layers. The two layers are hot-pressed together at 100℃ and 0.6MPa for 15s to obtain an antibacterial and breathable fabric.

[0088] Experiment: Antibacterial properties: The antibacterial properties of the antimicrobial breathable fabric were evaluated using the plate count method with Gram-negative Escherichia coli and Gram-positive Staphylococcus aureus as test strains. The bacterial suspension was diluted with PBS (10... 9 (CFU / mL) diluted to 10 6 The concentration was determined to be CFU / mL. The leather and bacterial suspension were incubated together at 37°C with shaking (150 rpm). The culture was continued for 18 hours according to the method specified in GB / T 20944.3-2008. After incubation, the co-culture suspension was diluted to 10⁻¹⁰ with PBS. 4 Take 100 μL of CFU / mL and spread it evenly on a fresh LB agar plate. Incubate at 37°C for 24 h to allow colonies to form, and then count the colonies.

[0089] Breathability: The breathability of the fabric was measured using a fully automatic fabric breathability meter;

[0090] Moisture permeability: The water vapor transmission rate of the fabric is measured using a moisture permeability tester;

[0091] The experimental results are shown in Table 1 below.

[0092] Table 1 Performance Test Data of Antibacterial and Breathable Fabrics

[0093]

[0094] Conclusion: The antibacterial and breathable fabric prepared by this invention has excellent antibacterial, breathable, and moisture-permeable properties.

[0095] The addition of excessive green tea tannin extract and avocado oil in Comparative Example 1 resulted in decreased stability of the chitosan emulsion, leading to a decline in the performance of the antibacterial and breathable fabric.

[0096] The absence of water dispersion in Comparative Example 2 resulted in a decrease in the performance of the antibacterial and breathable fabric.

[0097] Comparative Example 3 did not contain carboxylated beet derivatives, which led to a decrease in the performance of the antibacterial and breathable fabric.

[0098] Antibacterial adhesion: The moisture-wicking antibacterial cotton fabric prepared in Example 1 was placed in a bacterial suspension and cultured for 6 hours. The cultured substrate was washed with phosphate-buffered saline (PBS), and the attached bacterial cells were stained with a live / dead cell staining agent to observe the amount of bacterial adhesion. Using the average pH value of human sweat (5) as a benchmark, the antibacterial adhesion performance of the moisture-wicking antibacterial cotton fabric in a physiologically acidic environment was tested.

[0099] The experimental results are shown in Table 2 below.

[0100] Table 2. Data on the antibacterial adhesion performance of antibacterial and breathable fabrics.

[0101] Bacterial adhesion rate / % Bacterial adhesion rate (acidity) / % Example 1 88.9 36.7

[0102] Conclusion: The antibacterial and breathable fabric prepared by this invention has excellent antibacterial adhesion properties. When the human body wears it and sweats, it can still have a certain degree of antibacterial adhesion properties even when in contact with the acidic conditions of sweat.

[0103] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the invention can be implemented in other specific forms without departing from the spirit or essential characteristics of the invention. Therefore, the embodiments should be considered in all respects as exemplary and non-limiting, and the scope of the invention is defined by the appended claims rather than the foregoing description. Thus, it is intended that all variations falling within the meaning and scope of equivalents of the claims be included within the present invention.

Claims

1. A process for the manufacture of an antibacterial, air-permeable fabric, characterized in that: The method comprises the following steps: S1: adding triethylamine into deionized water, heating to 80-82℃, stirring uniformly, adding cetyltrimethylammonium bromide and sodium lignosulfonate, keeping stirring for 1-1.5h, adding the composite precursor solution, keeping reaction for 4-4.5h, washing the product with ethanol and deionized water alternately, freeze-drying, adding the product into deionized water to obtain a water dispersion; S2: adding the water dispersion into the aqueous polyurethane emulsion, ultrasonic dispersion to obtain a functional coating; immersing the fiber substrate into the functional coating, standing at room temperature for 5-10min, taking out, passing through a roller, and heat treating at 100-120℃ for 20-25min to obtain a functional fiber leather; S3: adding chitosan into 2%v / v acetic acid aqueous solution, stirring at room temperature to obtain a chitosan solution, adding deionized water, glycerol and 30%v / v Tween 80 in sequence, stirring and homogenizing at room temperature, adding green tea tannin extract and avocado oil, stirring and homogenizing at room temperature to obtain a chitosan emulsion; S4: sequentially performing alkali heat treatment and bleaching treatment on the cotton textile fabric, immersing the cotton textile fabric into a citric acid solution, adjusting pH, washing, squeezing, and airing at room temperature to obtain a pretreated cotton textile fabric; S5: immersing the pretreated cotton textile fabric into the chitosan emulsion, drying at 50-52℃ when the moisture absorption rate reaches 85-90%, immersing the fabric into a carboxybetaine derivative solution for 18-24h after drying, washing, and drying to obtain a moisture absorption and antibacterial cotton textile fabric; S6: taking the functional fiber leather as an upper surface layer, the moisture absorption and antibacterial cotton textile fabric as a lower surface layer, and an EVA hot melt net as an adhesive sandwiched between the two layers, hot pressing to obtain an antibacterial and breathable fabric; In the preparation process of the chitosan emulsion, the mass ratio of chitosan, Tween 80, glycerol, green tea tannin extract, avocado oil and deionized water is 50:1.67:9:(1-3):(1-3):(33.33-37.33).

2. The process for processing an anti-bacterial, breathable fabric as claimed in claim 1, wherein: In the preparation process of the water dispersion, 0.06g of cetyltrimethylammonium bromide and 0.24g of sodium lignosulfonate are added into 7mL of the composite precursor solution, and 200μL of triethylamine is added.

3. The process for processing an anti-bacterial, breathable fabric as claimed in claim 2, wherein: The preparation method of the composite precursor solution comprises the following steps: heating ethanol and acidic water to 40-42℃, stirring uniformly, adding tetraethyl orthosilicate and 1,2-bis(triethoxysilyl)ethane, and stirring uniformly to obtain the composite precursor solution. In the preparation process of the composite precursor solution, the volume ratio of ethanol, acidic water, tetraethyl orthosilicate and 1,2-bis(triethoxysilyl)ethane is 4.5:0.5:1:

1.

4. The process for manufacturing an anti-bacterial, breathable fabric as claimed in claim 1, wherein: In the preparation process of the functional coating, the mass ratio of the water dispersion to the aqueous polyurethane emulsion is (8.1-10.3):(79.7-81.9).

5. The process for manufacturing an anti-bacterial, breathable fabric as claimed in claim 1, wherein the fabric is subjected to a process of hydro-entanglement. The preparation method of the carboxybetaine derivative solution comprises the following steps: adding the carboxybetaine derivative into a Tris buffer solution, adding sodium iodate, stirring at room temperature for 18-24h to obtain the carboxybetaine derivative solution. In the preparation process of the carboxybetaine derivative solution, the concentration of the carboxybetaine derivative buffer solution is 2 mg / mL, and the molar ratio of the carboxybetaine derivative to sodium iodate is 1:

2.

6. The process for manufacturing an anti-bacterial, breathable fabric as claimed in claim 5, wherein the fabric is subjected to a process of hydro-entanglement. The preparation process of the carboxybetaine derivative includes the following steps: Step (1): L-dopa is added to acetone, stirred uniformly, 1M sodium hydroxide solution and di-tert-butyl dicarbonate are added under ice bath condition, stirred at room temperature for 4-5 h, rotary evaporation, the product is washed with 1M hydrochloric acid solution, deionized water and saturated sodium chloride solution, dried with anhydrous magnesium sulfate, concentrated to obtain tert-butyloxycarbonyl L-dopa; Step (2): tert-butyloxycarbonyl L-dopa is added to acetonitrile solution, tert-butyl dimethylchlorosilane is added, stirred uniformly under ice bath condition, 1,8-diazabicyclo[5.4.0]undec-7-ene is added, stirred at room temperature for 16-17 h, rotary evaporation, the product is washed with deionized water and saturated sodium chloride solution, dried with anhydrous sulfuric acid, and purified by silica gel column to obtain compound 2; Step (3): compound 2 and 3-dimethylamino-1-propanol are added to dichloromethane, stirred uniformly, dicyclohexyl carbodiimide and 4-dimethylaminopyridine are added, stirred at room temperature for 18-19 h, filtered, the product is washed with hexane, and purified by silica gel column to obtain compound 3; Step (4): compound 3 is added to acetonitrile, stirred uniformly, tert-butyl bromoacetate is added, heated to 56-57℃ for reaction for 18-20 h, rotary evaporation, and purified by silica gel column to obtain compound 4; Step (5): under ice bath condition, tetrabutylammonium fluoride is added to a tetrahydrofuran solution of compound 4, stirred for 3-3.5 h, rotary evaporation, the product is added to dichloromethane, stirred uniformly, trifluoroacetic acid is added under ice bath condition, reacted at room temperature for 3-3.5 h, rotary evaporation, and purified by silica gel column to obtain the carboxybetaine derivative.

7. The process for processing an anti-bacterial, breathable fabric as claimed in claim 6, wherein: In the preparation process of tert-butyloxycarbonyl L-dopa, the molar ratio of L-dopa, sodium hydroxide and di-tert-butyl dicarbonate is 10:11:11; in the preparation process of compound 2, the molar ratio of tert-butyloxycarbonyl L-dopa, tert-butyl dimethylchlorosilane and 1,8-diazabicyclo[5.4.0]undec-7-ene is 8.7:21.8:21.8; in the preparation process of compound 3, the molar ratio of compound 2, 3-dimethylamino-1-propanol, dicyclohexyl carbodiimide and 4-dimethylaminopyridine is 5.7:6.3:6.3:6.3; in the preparation process of compound 4, the molar ratio of compound 3 and tert-butyl bromoacetate is 2.5:3.75; in the preparation process of the carboxybetaine derivative, the molar ratio of tetrabutylammonium fluoride, compound 4 and trifluoroacetic acid is 4.8:1.9:22.

9.

8. The process for manufacturing an anti-bacterial, breathable fabric as claimed in claim 1, wherein: The hot-pressing composite temperature is 100-105℃, the pressure is 0.6-0.7 MPa, and the time is 15-20 s.

9. Application of the antibacterial and breathable fabric prepared by the processing process of any one of claims 1-8 in clothing.

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