Processing technology of antibacterial breathable fabric and clothing applying same

Abstract

The invention discloses a processing technology of an antibacterial breathable fabric and clothing applying the same, and relates to the technical field of clothing fabrics, the processing technology of the antibacterial breathable fabric comprises the following steps: sequentially carrying out alkali heat treatment and bleaching treatment on a cotton textile fabric, immersing the cotton textile fabric in a citric acid solution, adjusting the pH value, washing, extruding, and airing at room temperature, pre-treated cotton textile fabric is obtained; the pretreated cotton textile fabric is padded in a chitosan emulsion, when the moisture absorption rate reaches 85-90%, drying treatment is conducted at the temperature of 50-52 DEG C, after drying treatment, the fabric is soaked in a carboxyl betaine derivative solution for 18-24 h, washing and drying are conducted, and the moisture-absorption antibacterial cotton textile fabric is obtained. The functional fiber leather is used as an upper surface layer, the moisture-absorbing antibacterial cotton textile fabric is used as a lower surface layer, an EVA hot melting net is used as an adhesive to be clamped between the two layers, and hot pressing compounding is performed to obtain the antibacterial breathable fabric.

Description

Technical Field

[0001] The present invention relates to the technical field of clothing fabrics, in particular to a processing technology for antibacterial breathable fabrics and clothing using the same. Background Art

[0002] In today's textile and apparel industry, consumers' demands for clothing are becoming increasingly diverse. They are no longer satisfied with just appearance and comfort, but are more concerned with functionality and safety. Traditional fabrics have exposed many problems during use, making the development of fabrics with special functions an important development direction for the industry.

[0003] From an antibacterial perspective, ordinary fabrics can easily become a breeding ground for bacteria. During daily wear, the human body secretes substances such as sweat and oil, which provide rich nutrients for the growth of bacteria. When bacteria multiply in large numbers on fabrics, they not only produce unpleasant odors, affecting the wearing experience, but may also cause skin diseases and pose a threat to human health. In particular, for some special groups, such as children, the elderly, and those with weakened immune systems, the risk of bacterial infection is higher. Although some existing antibacterial fabrics can inhibit bacterial growth to a certain extent, the antibacterial effect is often not long-lasting, and the antibacterial performance will decrease significantly with the increase in the number of washings. Moreover, some antibacterial treatment methods may use chemicals that are harmful to the human body, which brings new health risks while meeting antibacterial needs.

[0004] Traditional fabrics also have significant deficiencies in terms of breathability. Many fabrics have poor breathability, which prevents sweat from being expelled promptly and causes it to accumulate on the skin surface, making people feel hot and humid, greatly reducing wearing comfort. Especially during exercise or in high-temperature environments, such non-breathable fabrics can make people feel even more uncomfortable and may even affect the body's normal physiological functions. Some fabrics that use a tightly woven process for aesthetic reasons have even more prominent breathability issues. At the same time, existing breathable fabrics have difficulty balancing other properties. For example, it is difficult to ensure good waterproof and windproof properties while ensuring breathability.

[0005] Furthermore, with changing lifestyles and an increase in outdoor activities, the demand for antibacterial and breathable clothing is becoming increasingly urgent. Healthcare, sports, outdoor work, and other fields place higher demands on clothing for its antibacterial and breathable properties. However, relatively few fabrics and clothing made from them can simultaneously meet these requirements, while maintaining stable performance, and being safe and environmentally friendly. Therefore, developing a process for producing antibacterial and breathable fabrics and applying them to various types of clothing holds significant practical significance and holds broad market potential. Summary of the Invention

[0006] The purpose of the present invention is to provide a processing technology for antibacterial breathable fabric and clothing using the same, so as to solve the problems raised in the prior art.

[0007] To achieve the above object, the present invention provides the following technical solutions:

[0008] A process for producing an antibacterial, breathable fabric comprises the following steps: S1: adding triethylamine to deionized water, heating to 80-82°C, stirring evenly, adding cetyltrimethylammonium bromide and sodium lignin sulfonate, and stirring for 1-1.5 hours. Adding a composite precursor solution, keeping the mixture warm for 4-4.5 hours, washing the product alternately with ethanol and deionized water, freeze-drying, and adding the product to deionized water to obtain an aqueous dispersion;

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

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

[0011] Furthermore, during 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 lignin sulfonate Mw=52000;

[0014] S2: adding the aqueous dispersion to an aqueous polyurethane emulsion and ultrasonically dispersing the dispersion to obtain a functional coating; immersing a fiber substrate in the functional coating, allowing the substrate to stand at room temperature for 5-10 minutes, removing the substrate, and heat-treating the substrate at 100-120° C. for 20-25 minutes through a roller to obtain a functional fiber leather;

[0015] Furthermore, during the preparation 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 a sea-island fiber substrate;

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

[0019] S3: chitosan was added to a 2% v / v acetic acid aqueous solution and stirred at room temperature to obtain a chitosan solution, deionized water, glycerol, and 30% v / v Tween 80 were added in sequence and stirred at room temperature for homogenization, green tea tannin extract and avocado oil were added and stirred at room temperature for homogenization to obtain a chitosan emulsion;

[0020] Furthermore, during the preparation 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 at a volume ratio of 1:1;

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

[0023] S4: treating the cotton textile fabric with hot alkali in treatment bath A at 95° C. for 90 min, repeatedly washing the cotton textile fabric at 80° C., 60° C., 40° C. and room temperature for 10 min, heat-treating the cotton textile fabric in treatment bath B at 98° C. for 60 min, bleaching the cotton textile fabric in treatment bath C at the same temperature for 60 min, rinsing the cotton textile fabric at 90° C., 60° C. and 40° C. for 10 min, washing with cold water, immersing the cotton textile fabric in 4 g / L citric acid solution for 20 min, adjusting the pH, washing, squeezing, and drying at room temperature to obtain a pretreated cotton textile fabric;

[0024] Furthermore, the treatment bath A includes 4 mL / L sodium hydroxide solution (38° Baume), 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 cotton textile fabric specifications are: plain weave, 168g / m 2 ;

[0026] Furthermore, the treatment bath B includes 4 mL / L sodium hydroxide solution (38° Baume), 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 (38° Baume), 2 g / L Kemaxi l solution, and 1 g / L Kemapon PC solution;

[0028] S5: Dipping the pretreated cotton textile fabric into the chitosan emulsion, and drying the fabric at 50-52° C. when the moisture absorption rate reaches 85-90%. After drying, dipping the fabric into a carboxybetaine derivative solution for 18-24 hours, washing, and drying to obtain a hygroscopic antibacterial cotton textile fabric.

[0029] Furthermore, the padding parameters are 2 padding times, a padding rate of 1 m / min, and a pressure of 0.74-0.75 bar;

[0030] Furthermore, the method for preparing the carboxybetaine derivative solution comprises 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 a 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 the carboxybetaine derivative to the sodium iodate is 1:2;

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

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

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

[0034] Step (1): add levodopa to acetone, stir evenly, add 1M sodium hydroxide solution and di-tert-butyl dicarbonate under ice bath condition, 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 over anhydrous magnesium sulfate, and concentrate to obtain tert-butyloxycarbonyl levodopa;

[0035] In the preparation of tert-butyloxycarbonyl-levodopa, the molar ratio of levodopa: sodium hydroxide: di-tert-butyl dicarbonate is 10:11:11;

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

[0037] In the preparation of compound 2, the molar ratio of tert-butyloxycarbonyl-levodopa:tert-butyldimethylsilyl chloride:1,8-diazabicyclo[5.4.0]undec-7-ene is 8.7:21.8:21.8;

[0038] Step (3): Compound 2 and 3-dimethylamino-1-propanol were added to dichloromethane, stirred evenly, and dicyclohexylcarbodiimide and 4-dimethylaminopyridine were added. The mixture was stirred at room temperature for 18-19 hours, filtered, and the product was washed with hexane and purified on a silica gel column to obtain compound 3;

[0039] During 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): Compound 3 was added to acetonitrile, stirred evenly, tert-butyl bromoacetate was added, and the mixture was heated to 56-57°C for 18-20 hours, and then rotary evaporated and purified on a silica gel column to obtain compound 4;

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

[0042] Step (5): under ice bath conditions, tetrabutylammonium fluoride was added to a tetrahydrofuran solution of compound 4, stirred for 3-3.5 hours, and rotary evaporated. The product was added to dichloromethane and stirred evenly. Under ice bath conditions, trifluoroacetic acid was added, and the reaction was carried out at room temperature for 3-3.5 hours. The reaction was rotary evaporated and purified on a silica gel column to obtain a carboxybetaine derivative;

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

[0044] The invention discloses an antibacterial breathable fabric prepared by a processing technology for the antibacterial breathable fabric and its application in clothing.

[0045] Compared with the prior art, the present invention has the following beneficial effects:

[0046] 1. The carboxybetaine derivatives in this invention form a strong hydration layer through their zwitterionic structure (carrying both positive and negative charges). The electrostatic interactions can disrupt the integrity of bacterial cell membranes and hinder protein adsorption. Literature studies have shown that CB-DOPA coatings significantly increase their surface hydrophilicity after oxidation with sodium iodate under alkaline conditions. This hydration layer is further stabilized through hydrogen bonding and ionic interactions, thereby inhibiting initial bacterial adhesion.

[0047] 2. In the present invention, chitosan is protonated by amino groups (-NH3 +) binds to the negative charge of the bacterial cell wall, disrupting membrane permeability; the polyphenols in green tea tannins chelate metal ions and inhibit 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 interaction, reducing antimicrobial loss.

[0048] 3. The hollow structure of the aqueous dispersion prepared by this invention increases the free volume within the coating, providing channels for water molecules and gas diffusion. The sulfonic acid groups of sodium lignin sulfonate form hydrogen bonds with the amide bonds of WPU, improving the dispersibility of the nanofiller and preventing the degradation of mechanical properties caused by particle agglomeration. Furthermore, the conjugated structure of lignin (benzene rings and quinone groups) imparts UV absorption to the coating, significantly extending the outdoor service life of the fabric.

[0049] 4. This invention forms a physical crosslinking network through the polar segments of EVA, 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 wear resistance of the surface layer with the moisture absorption and breathability of the inner layer, creating a biomimetic "rigid and flexible" structure. DETAILED DESCRIPTION

[0050] The following is a clear and complete description of the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making any creative efforts are within the scope of protection of the present invention.

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

[0052] Step (1): 10 mmol of levodopa was added to acetone and stirred evenly. A 1 M sodium hydroxide solution containing 11 mmol of sodium hydroxide and 11 mmol of di-tert-butyl dicarbonate were added under ice bath conditions. The mixture was stirred at room temperature for 4-5 hours. The mixture was rotary evaporated and the product was washed with 1 M hydrochloric acid solution, deionized water and saturated sodium chloride solution. The product was dried over anhydrous magnesium sulfate and concentrated to obtain tert-butyloxycarbonyl levodopa.

[0053] Step (2): 8.7 mmol of tert-butyloxycarbonyl-L-dopa was added to an acetonitrile solution, 21.8 mmol of tert-butyldimethylsilyl chloride was added, and the mixture was stirred evenly under ice bath conditions. 21.8 mmol of 1,8-diazabicyclo[5.4.0]undec-7-ene was added, and the mixture was stirred at room temperature for 16 h. The mixture was rotary evaporated, and the product was washed with deionized water and a saturated sodium chloride solution, dried over anhydrous sulfuric acid, and purified on a silica gel column 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, stirred evenly, and 6.3 mmol of dicyclohexylcarbodiimide and 6.3 mmol of 4-dimethylaminopyridine were added. The mixture was stirred at room temperature for 18 h, filtered, and the product was washed with hexane and purified on a silica gel column to obtain compound 3;

[0055] Step (4): Add 2.5 mmol of compound 3 to acetonitrile, stir evenly, add 3.75 mmol of tert-butyl bromoacetate, heat to 56°C for 18 h, rotary evaporate, and purify on a silica gel column 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, and rotary evaporated. 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 allowed to react at room temperature for 3 h. The reaction was rotary evaporated and purified on a silica gel column to obtain a carboxybetaine derivative.

[0057] Example 1: A process for producing an antibacterial, breathable fabric comprises the following steps: S1: Add 200 μL of triethylamine to deionized water, heat to 80°C, and stir evenly. Then, add 0.06 g of hexadecyltrimethylammonium bromide and 0.24 g of sodium ligninsulfonate, and stir at this temperature for 1 hour. Then, add 7 mL of a composite precursor solution, and allow to react at this temperature for 4 hours. The product is washed alternately with ethanol and deionized water, freeze-dried, and added to deionized water to obtain an aqueous dispersion.

[0058] S2: 8.1 g of the aqueous dispersion was added to 81.9 g of an aqueous polyurethane emulsion and ultrasonically dispersed to obtain a functional coating; a fiber substrate was immersed in the functional coating, allowed to stand at room temperature for 5 min, removed, and heat-treated at 100°C for 20 min through a roller to obtain a functional fiber leather;

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

[0060] S4: treating the cotton textile fabric with hot alkali in treatment bath A at 95° C. for 90 min, repeatedly washing the cotton textile fabric at 80° C., 60° C., 40° C. and room temperature for 10 min, heat-treating the cotton textile fabric in treatment bath B at 98° C. for 60 min, bleaching the cotton textile fabric in treatment bath C at the same temperature for 60 min, rinsing the cotton textile fabric at 90° C., 60° C. and 40° C. for 10 min, washing with cold water, immersing the cotton textile fabric in 4 g / L citric acid solution for 20 min, adjusting the pH, washing, squeezing, and drying at room temperature to obtain a pretreated cotton textile fabric;

[0061] S5: Dipping the pretreated cotton textile fabric into the chitosan emulsion, and drying the fabric at 50° C. when the moisture absorption rate reaches 85%. After drying, dipping the fabric into a carboxybetaine derivative solution for 18 hours, washing, and drying the fabric to obtain a hygroscopic antibacterial cotton textile fabric.

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

[0063] Example 2: A process for producing an antibacterial breathable fabric, comprising the following steps: S2: adding 8.1 g of an aqueous dispersion to 81.9 g of an aqueous polyurethane emulsion, and ultrasonically dispersing the dispersion to obtain a functional coating; immersing a fiber substrate in the functional coating, allowing the substrate to stand at room temperature for 5 minutes, removing the substrate, and heat-treating the substrate at 100° C. for 20 minutes through a roller to obtain a functional fiber leather;

[0064] S3: 50 g of chitosan was added to a 2% v / v acetic acid aqueous solution and stirred at room temperature to obtain a chitosan solution. 35.33 g of deionized water, 9 g of glycerol, and 1.67 g of 30% v / v Tween 80 were added in sequence and stirred at room temperature for homogenization. 2 g of green tea tannin extract and 2 g of avocado oil were added and stirred at room temperature for homogenization to obtain a chitosan emulsion.

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

[0066] Example 3: A process for producing an antibacterial breathable fabric, comprising the following steps: S2: adding 8.1 g of an aqueous dispersion to 81.9 g of an aqueous polyurethane emulsion, and ultrasonically dispersing the dispersion to obtain a functional coating; immersing a fiber substrate in the functional coating, allowing the substrate to stand at room temperature for 5 minutes, removing the substrate, and heat-treating the substrate at 100° C. for 20 minutes through a roller to obtain a functional fiber leather;

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

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

[0069] Example 4: A process for producing an antibacterial breathable fabric, comprising the following steps: S2: adding 9.2 g of an aqueous dispersion to 80.8 g of an aqueous polyurethane emulsion, and ultrasonically dispersing the dispersion to obtain a functional coating; immersing a fiber substrate in the functional coating, allowing the substrate to stand at room temperature for 5 minutes, removing the substrate, and heat-treating the substrate at 100° C. for 20 minutes using a roller to obtain a functional fiber leather;

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

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

[0072] Example 5: A process for producing an antibacterial breathable fabric, comprising the following steps: S2: adding 10.3 g of an aqueous dispersion to 7.7 g of an aqueous polyurethane emulsion, and ultrasonically dispersing the dispersion to obtain a functional coating; immersing a fiber substrate in the functional coating, allowing the substrate to stand at room temperature for 5 minutes, removing the substrate, and heat-treating the substrate at 100° C. for 20 minutes through a roller to obtain a functional fiber leather;

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

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

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

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

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

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

[0079] S3: treating the cotton textile fabric with hot alkali in treatment bath A at 95°C for 90 min, repeatedly washing the cotton textile fabric at 80°C, 60°C, 40°C and room temperature for 10 min, heat-treating the cotton textile fabric in treatment bath B at 98°C for 60 min, bleaching the cotton textile fabric in treatment bath C at the same temperature for 60 min, rinsing the cotton textile fabric at 90°C, 60°C and 40°C for 10 min, washing with cold water, immersing the cotton textile fabric in 4 g / L citric acid solution for 20 min, adjusting the pH, washing, squeezing, and drying at room temperature to obtain a pretreated cotton textile fabric;

[0080] S4: The pretreated cotton textile fabric is dipped into the chitosan emulsion, and when the moisture absorption rate reaches 85%, the fabric is dried at 50° C. After the drying treatment, the fabric is immersed in a carboxybetaine derivative solution for 18 hours, washed, and dried to obtain a hygroscopic antibacterial cotton textile fabric;

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

[0082] Comparative Example 3: A process for producing an antibacterial, breathable fabric, comprising the following steps: S1: Add 200 μL of triethylamine to deionized water, heat to 80°C, and stir evenly. Then, add 0.06 g of hexadecyltrimethylammonium bromide and 0.24 g of sodium ligninsulfonate, and stir at this temperature for 1 hour. Add 7 mL of the composite precursor solution, and allow to react at this temperature for 4 hours. The product is washed alternately with ethanol and deionized water, freeze-dried, and added to deionized water to obtain an aqueous dispersion.

[0083] S2: 8.1 g of the aqueous dispersion was added to 81.9 g of an aqueous polyurethane emulsion and ultrasonically dispersed to obtain a functional coating; a fiber substrate was immersed in the functional coating, allowed to stand at room temperature for 5 min, removed, and heat-treated at 100°C for 20 min through a roller to obtain a functional fiber leather;

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

[0085] S4: treating the cotton textile fabric with hot alkali in treatment bath A at 95° C. for 90 min, repeatedly washing the cotton textile fabric at 80° C., 60° C., 40° C. and room temperature for 10 min, heat-treating the cotton textile fabric in treatment bath B at 98° C. for 60 min, bleaching the cotton textile fabric in treatment bath C at the same temperature for 60 min, rinsing the cotton textile fabric at 90° C., 60° C. and 40° C. for 10 min, washing with cold water, immersing the cotton textile fabric in 4 g / L citric acid solution for 20 min, adjusting the pH, washing, squeezing, and drying at room temperature to obtain a pretreated cotton textile fabric;

[0086] S5: Dipping the pretreated cotton textile fabric into the chitosan emulsion, and drying the pretreated cotton textile fabric at 50° C. when the moisture absorption rate reaches 85%, thereby obtaining a moisture-absorbing antibacterial cotton textile fabric;

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

[0088] Experiment: Antibacterial property: Gram-negative bacteria Escherichia coli and Gram-positive bacteria Staphylococcus aureus were used as test strains, and the antibacterial performance of antibacterial breathable fabrics was evaluated by plate count method. 9 CFU / mL) was diluted to 10 6 The leather was incubated with the bacterial suspension and cultured at 37°C with shaking (150 rpm). The culture was carried out for 18 hours according to the method specified in GB / T 20944.3-2008. After incubation, the co-culture suspension was diluted to 10 4 CFU / mL, take 100 μL and evenly spread it on a fresh LB plate, culture at 37 °C for 24 h to allow colonies to form, and then count the colonies.

[0089] Breathability: Use a fully automatic fabric breathability tester to measure the breathability of the fabric;

[0090] Water vapor permeability: Use a water vapor permeability tester to measure the water vapor permeability of the fabric;

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

[0092] Table 1 Performance test data of antibacterial breathable fabrics

[0093]

[0094] Conclusion: The antibacterial breathable fabric prepared by the present invention has excellent antibacterial, breathable and moisture permeability properties.

[0095] In Comparative Example 1, excessive addition of green tea tannic acid extract and avocado oil resulted in poor stability of the chitosan emulsion, leading to a decrease in the performance of the antibacterial and breathable fabric.

[0096] Comparative Example 2 does not contain an aqueous dispersion, resulting in a decrease in the performance of the antibacterial and breathable fabric.

[0097] Comparative Example 3 does not contain a carboxylated beet derivative, resulting in a decrease in the performance of the antibacterial and breathable fabric.

[0098] Antibacterial Adhesion: The hygroscopic antibacterial cotton fabric prepared in Example 1 was incubated in a bacterial suspension for 6 hours. The substrate was then washed with phosphate-buffered saline (PBS) and the attached bacterial cells were stained with a dead cell stain to measure the bacterial adhesion. The antibacterial adhesion performance of the hygroscopic antibacterial cotton fabric was tested in a physiologically acidic environment, using the average pH value of human sweat of 5 as a benchmark.

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

[0100] Table 2 Antibacterial adhesion performance data of antibacterial breathable fabrics

[0101] Bacterial attachment rate / % Bacterial attachment rate (acidic) / % Example 1 88.9 36.7

[0102] Conclusion: The antibacterial breathable fabric prepared by the present invention has excellent antibacterial adhesion performance. When the human body sweats while wearing it, it can still have certain antibacterial adhesion performance under 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 embodied in other specific forms without departing from the spirit or essential characteristics of the invention. Therefore, the embodiments should be considered in all respects as illustrative and non-restrictive, and the scope of the invention is defined by the appended claims rather than the foregoing description, and it is intended that all variations that come within the meaning and range of equivalents of the claims be embraced therein.

Claims

1. A processing technology for antibacterial breathable fabric, characterized by: The following steps are involved: S1: Add triethylamine to deionized water, heat to 80-82°C, stir evenly, add cetyltrimethylammonium bromide and sodium lignin sulfonate, and stir at this temperature for 1-1.5 hours. Add the composite precursor solution, and react at this temperature for 4-4.5 hours. Wash the product alternately with ethanol and deionized water, freeze-dry, and add the product to deionized water to obtain an aqueous dispersion. S2: adding the aqueous dispersion to an aqueous polyurethane emulsion and ultrasonically dispersing the dispersion to obtain a functional coating; immersing a fiber substrate in the functional coating, allowing the substrate to stand at room temperature for 5-10 minutes, removing the substrate, and heat-treating the substrate at 100-120° C. for 20-25 minutes through a roller to obtain a functional fiber leather; S3: chitosan was added to a 2% v / v acetic acid aqueous solution and stirred at room temperature to obtain a chitosan solution, deionized water, glycerol, and 30% v / v Tween 80 were added in sequence and stirred at room temperature for homogenization, green tea tannin extract and avocado oil were added and stirred at room temperature for homogenization to obtain a chitosan emulsion; S4: sequentially subjecting the cotton textile fabric to an alkali heat treatment and a bleaching treatment, immersing the cotton textile fabric in a citric acid solution, adjusting the pH, washing, squeezing, and drying at room temperature to obtain a pretreated cotton textile fabric; S5: Dipping the pretreated cotton textile fabric into the chitosan emulsion, and drying the fabric at 50-52° C. when the moisture absorption rate reaches 85-90%. After drying, dipping the fabric into a carboxybetaine derivative solution for 18-24 hours, washing, and drying to obtain a hygroscopic antibacterial cotton textile fabric. S6: Functional fiber leather is used as the upper surface layer, moisture-absorbing antibacterial cotton textile fabric is used as the lower surface layer, EVA hot-melt mesh is sandwiched between the two layers as an adhesive, and hot-pressed composite is performed to obtain an antibacterial and breathable fabric.

2. The processing technology of the antibacterial breathable fabric according to claim 1, characterized in that: During the preparation of the aqueous dispersion, 0.06 g of hexadecyltrimethylammonium bromide, 0.24 g of sodium lignin sulfonate, and 200 μL of triethylamine were added to every 7 mL of the composite precursor solution.

3. The processing technology of the antibacterial breathable fabric according to claim 2, characterized in that: The preparation method of the composite precursor solution comprises the following steps: heating ethanol and acidic water to 40-42° C., stirring evenly, adding tetraethyl silicate and 1,2-bis(triethoxysilyl)ethane, stirring evenly, and obtaining a composite precursor solution; During the preparation of the composite precursor solution, the volume ratio of ethanol: acidic water: tetraethyl silicate: 1,2-bis(triethoxysilyl)ethane was 4.5:0.5:1:

1.

4. The processing technology of the antibacterial breathable fabric according to claim 1, characterized in that: During the preparation of the functional coating, the mass ratio of water dispersion to waterborne polyurethane emulsion is (8.1-10.3):(79.7-81.9).

5. The processing technology of the antibacterial breathable fabric according to claim 1, characterized in that: During the preparation of chitosan emulsion, the mass ratio of chitosan: Tween 80: glycerol: green tea tannin extract: avocado oil: deionized water was (30-50):1.67:9:(1-3):(1-3):(33.33-53.33).

6. The processing technology of the antibacterial breathable fabric according to claim 1, characterized in that: The method for preparing the carboxybetaine derivative solution comprises 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 was 2 mg / mL, and the molar ratio of the carboxybetaine derivative to sodium iodate was 1:

2.

7. The processing technology of the antibacterial breathable fabric according to claim 6, characterized in that: The preparation process of the carboxybetaine derivative comprises the following steps: Step (1): add levodopa to acetone, stir evenly, add 1M sodium hydroxide solution and di-tert-butyl dicarbonate under ice bath condition, 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 over anhydrous magnesium sulfate, and concentrate to obtain tert-butyloxycarbonyl levodopa; Step (2): Add tert-butyloxycarbonyl-levodopa to an acetonitrile solution, add tert-butyldimethylsilyl chloride, stir evenly under ice bath conditions, add 1,8-diazabicyclo[5.4.0]undec-7-ene, stir at room temperature for 16-17 hours, rotary evaporation, wash the product with deionized water and saturated sodium chloride solution, dry with anhydrous sulfuric acid, and purify on a silica gel column to obtain compound 2; Step (3): Compound 2 and 3-dimethylamino-1-propanol were added to dichloromethane, stirred evenly, and dicyclohexylcarbodiimide and 4-dimethylaminopyridine were added. The mixture was stirred at room temperature for 18-19 hours, filtered, and the product was washed with hexane and purified on a silica gel column to obtain compound 3; Step (4): Compound 3 was added to acetonitrile, stirred evenly, tert-butyl bromoacetate was added, and the mixture was heated to 56-57°C for 18-20 hours, and then rotary evaporated and purified on a silica gel column to obtain compound 4; Step (5): Add tetrabutylammonium fluoride to a tetrahydrofuran solution of compound 4 under ice bath conditions, stir for 3-3.5 hours, and evaporate by rotary evaporation. Add the product to dichloromethane and stir evenly. Add trifluoroacetic acid under ice bath conditions, react at room temperature for 3-3.5 hours, and evaporate by rotary evaporation. Purify by silica gel column to obtain a carboxybetaine derivative.

8. The processing technology of the antibacterial breathable fabric according to claim 7, characterized in that: In the preparation process of tert-butyloxycarbonyl-levodopa, the molar ratio of levodopa: sodium hydroxide: di-tert-butyl dicarbonate is 10:11:11; in the preparation process of compound 2, the molar ratio of tert-butyloxycarbonyl-levodopa: tert-butyldimethylchlorosilane: 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: dicyclohexylcarbodiimide: 4-dimethylaminopyridine is 5.7:6.3:6.3:6.3; in the preparation process of compound 4, the molar ratio of compound 3: tert-butyl bromoacetate is 2.5:3.75; in the preparation process of carboxybetaine derivatives, the molar ratio of tetrabutylammonium fluoride: compound 4: trifluoroacetic acid is 4.8:1.9:22.

9.

9. The processing technology of the antibacterial breathable fabric according to claim 1, characterized in that: The hot pressing composite temperature is 100-105° C., the pressure is 0.6-0.7 MPa, and the time is 15-20 seconds.

10. Application of the antibacterial breathable fabric prepared by the processing technology of the antibacterial breathable fabric according to any one of claims 1 to 9 in clothing.

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