Cooling and breathable clothing fabric and preparation method thereof

Abstract

This invention relates to the field of fabric technology and discloses a cooling and breathable clothing fabric and its preparation method. Maleate-modified cellulose and N-(3-chloro-2-hydroxypropyl)-N,N-dimethyl-N-alkylammonium chloride are reacted and hydrolyzed with sodium hydroxide to obtain a bisquaternary ammonium salt carboxylic acid cellulose finishing agent. Cotton fabric is then subjected to a two-dip and two-nip finishing process to obtain the cooling and breathable clothing fabric. The finishing agent contains a large amount of sodium carboxylate and bisquaternary ammonium salt carboxylic acid cellulose with quaternary ammonium salt groups. After finishing the cotton fabric, it significantly improves the fabric's hydrophilicity and moisture regain, promotes the absorption and diffusion of sweat, and removes heat through evaporation, lowering the body surface temperature, thereby enhancing the cooling sensation. The fabric is more cooling, comfortable, and breathable. The bisquaternary ammonium salt groups in the finishing agent have a stronger antibacterial effect, effectively inhibiting and killing bacteria and microorganisms, thus enhancing the fabric's antibacterial properties.

Description

Technical Field

[0001] This invention relates to the field of fabric technology, specifically to a cool and breathable clothing fabric and its preparation method. Background Technology

[0002] Cotton fabrics are breathable, soft, and skin-friendly, causing no irritation to the skin, making them a common clothing material. However, cotton fabrics are highly absorbent and prone to bacterial growth, posing certain health risks. Therefore, antibacterial treatment of cotton fabrics is of great importance.

[0003] By finishing fabrics, excellent moisture absorption, antibacterial properties, softness, and hand feel can be imparted to them. Cellulose is widely used in fabric finishing agents because it is inexpensive, readily available, biocompatible, non-toxic, and environmentally friendly.

[0004] Patent publication number CN107022900B discloses a fabric softener and its preparation method, using polydimethylsiloxane, carboxymethyl cellulose, and dihexadecyldimethylammonium chloride as softeners. The finished fabric has good antibacterial rate and soft hand feel. However, the softener does not improve the fabric's hydrophilicity and other properties, which is not conducive to improving the fabric's moisture permeability and breathability. Summary of the Invention

[0005] (I) Technical problem to be solved: In view of the shortcomings of the existing technology, the present invention provides a cool and breathable clothing fabric and a preparation method, which solves the problem of poor antibacterial properties of cotton fabrics, while maintaining good hydrophilicity, coolness, moisture permeability and breathability.

[0006] (II) Technical Solution: A method for preparing a cool and breathable clothing fabric:

[0007] S1. Isopropanol, maleate-modified cellulose, and N-(3-chloro-2-hydroxypropyl)-N,N-dimethyl-N-alkylammonium chloride are added to a flask equipped with a reflux condenser. The mixture is heated to 80-85°C for quaternization reaction for 24-36 hours. After filtration, the product is added to an aqueous sodium hydroxide solution and heated to 80-90°C for hydrolysis with stirring for 4-6 hours. The solution is poured into ethanol, filtered, and the product is washed with ethanol and dried to obtain a bisquaternary ammonium salt carboxylated cellulose finishing agent. The reaction formula is:

[0008]

[0009] S2. Add water and bisquaternary ammonium salt carboxycellulose finishing agent to the container, stir, and then add cotton fabric. The bath ratio is 1:(40-50). Perform two dips and two nips, with a nip-out rate of 80-90%. Then pre-dry at 80-90℃ for 3-5 minutes and bake at 155-165℃ for 3-4 minutes to obtain cool and breathable clothing fabric.

[0010] Preferably, the ratio of maleate-modified cellulose and N-(3-chloro-2-hydroxypropyl)-N,N-dimethyl-N-dodecylammonium chloride in S1 is 100g:(8-30)g.

[0011] Preferably, the structural formula of N-(3-chloro-2-hydroxypropyl)-N,N-dimethyl-N-alkylammonium chloride in S1 is as follows: n is between 12 and 16.

[0012] Preferably, the concentration of the sodium hydroxide aqueous solution in S1 is 80-120 g / L.

[0013] Preferably, the ratio of water to bisquaternary ammonium salt carboxycellulose finishing agent in S2 is 1L:(20-50)g.

[0014] Preferably, the method for preparing maleate-modified cellulose includes:

[0015] (1) Add tetrahydrofuran, cellulose, and 3-methylaminopropionic acid to a flask, stir, and then add 4-dimethylaminopyridine and dicyclohexylcarbodiimide. The ratio of cellulose, 3-methylaminopropionic acid, 4-dimethylaminopyridine, and dicyclohexylcarbodiimide is 100g:(2.1-10)g:(1.8-8.6)g:(4.4-20.8)g. Stir the reaction at 20-30℃ for 18-24h, pour the solution into ethanol, filter, wash the product with water and ethanol, and dry to obtain methylaminopropionic acid cellulose. The reaction formula is:

[0016]

[0017] (2) Add N,N-dimethylformamide, methylaminopropionic acid cellulose in a ratio of 100g:(3.2-16)g, and dimethyl maleate to a flask. Heat to 40-50℃ and stir for 8-12 hours. Pour the solution into ethanol, filter, wash the product with ethanol, and dry to obtain maleate-modified cellulose. The reaction formula is:

[0018]

[0019] (III) Beneficial technical effects: This invention involves amidation and Michael addition reactions of cellulose with 3-methylaminopropionic acid and dimethyl maleate, followed by quaternization and hydrolysis with sodium hydroxide to obtain a bisquaternary ammonium salt carboxyl cellulose finishing agent containing a large amount of sodium carboxylate and quaternary ammonium salt groups. After finishing cotton fabrics, it significantly improves the hydrophilicity and moisture regain of the fabric, promotes the absorption and diffusion of sweat, and removes heat through evaporation, thereby reducing the body surface temperature and enhancing the cooling sensation. The fabric is cooler and more comfortable to wear, and is breathable and moisture-wicking.

[0020] The finishing agent of this invention contains quaternary ammonium salt groups, which can disrupt the permeability of bacterial cell membranes, resulting in a stronger antibacterial effect. It can effectively inhibit and kill bacteria and microorganisms, thereby enhancing the antibacterial properties of the fabric. Detailed Implementation

[0021] Example 1:

[0022] (1) Add 400 mL of tetrahydrofuran, 50 g of cellulose, and 1.05 g of 3-methylaminopropionic acid to a flask. After stirring, add 0.9 g of 4-dimethylaminopyridine and 2.2 g of dicyclohexylcarbodiimide. Stir the reaction at 30 °C for 18 h. Pour the solution into ethanol, filter, wash the product with water and ethanol, and dry to obtain methylaminopropionic acid cellulose.

[0023] (2) Add 0.9 L N,N-dimethylformamide, 80 g of methylaminopropionate cellulose and 2.56 g of dimethyl maleate to a flask, heat to 45 °C, stir and react for 8 h, pour the solution into ethanol, filter and wash the product with ethanol, dry to obtain maleate modified cellulose.

[0024] (3) Add 500 mL of isopropanol, 40 g of maleate-modified cellulose, and 3.2 g of N-(3-chloro-2-hydroxypropyl)-N,N-dimethyl-N-dodecyl ammonium chloride (structural formula: ...) to a flask equipped with a reflux condenser. The product was heated to 85°C and quaternized for 30 hours. After filtration, the product was added to 600 mL of 120 g / L sodium hydroxide aqueous solution, heated to 80°C, and stirred for 6 hours for hydrolysis. The solution was then poured into ethanol, filtered, washed with ethanol, and dried to obtain the bisquaternary ammonium salt carboxylated cellulose finishing agent.

[0025] (4) Add 10L of water and 200g of double quaternary ammonium salt carboxycellulose finishing agent to the container, stir and then add cotton fabric. The bath ratio is 1:50. Perform two dips and two nips with a nip rate of 90%. Then pre-dry at 80℃ for 3min and bake at 160℃ for 3min to obtain cool and breathable clothing fabric.

[0026] Example 2:

[0027] (1) Add 500 mL of tetrahydrofuran, 50 g of cellulose, and 5 g of 3-methylaminopropionic acid to a flask, stir, and then add 4.3 g of 4-dimethylaminopyridine and 10.4 g of dicyclohexylcarbodiimide. Stir the reaction at 30 °C for 18 h, pour the solution into ethanol, filter, wash the product with water and ethanol, and dry to obtain methylaminopropionic acid cellulose.

[0028] (2) Add 1L of N,N-dimethylformamide, 80g of methylaminopropionic acid cellulose and 12.8g of dimethyl maleate to a flask, heat to 40°C, stir and react for 12h, pour the solution into ethanol, filter and wash the product with ethanol, dry to obtain maleate modified cellulose.

[0029] (3) Add 600 mL of isopropanol, 40 g of maleate-modified cellulose, and 12 g of N-(3-chloro-2-hydroxypropyl)-N,N-dimethyl-N-tetradecyl ammonium chloride (structural formula: ...) to a flask equipped with a reflux condenser. The product was heated to 80°C and quaternized for 36 hours. After filtration, the product was added to 800 mL of 80 g / L sodium hydroxide aqueous solution, heated to 90°C, and stirred for 5 hours for hydrolysis. The solution was poured into ethanol, filtered, washed with ethanol, and dried to obtain the bisquaternary ammonium salt carboxylated cellulose finishing agent.

[0030] (4) Add 10L of water and 350g of double quaternary ammonium salt carboxycellulose finishing agent to the container, stir, and then add cotton fabric. The bath ratio is 1:40. Perform two dips and two nips with a nip rate of 80%. Then pre-dry at 80℃ for 5 minutes and bake at 155℃ for 4 minutes to obtain cool and breathable clothing fabric.

[0031] Example 3:

[0032] (1) Add 500 mL of tetrahydrofuran, 50 g of cellulose, and 3.2 g of 3-methylaminopropionic acid to a flask, stir, and then add 2.7 g of 4-dimethylaminopyridine and 6.8 g of dicyclohexylcarbodiimide. Stir the reaction at 20 °C for 24 h, pour the solution into ethanol, filter, wash the product with water and ethanol, and dry to obtain methylaminopropionic acid cellulose.

[0033] (2) Add 1L of N,N-dimethylformamide, 80g of methylaminopropionate cellulose and 7.3g of dimethyl maleate to a flask, heat to 50°C, stir and react for 8h, pour the solution into ethanol, filter and wash the product with ethanol, dry to obtain maleate modified cellulose.

[0034] (3) Add 600 mL of isopropanol, 40 g of maleate-modified cellulose, and 7.9 g of N-(3-chloro-2-hydroxypropyl)-N,N-dimethyl-N-hexadecylammonium chloride (structural formula: ...) to a flask equipped with a reflux condenser. The product was heated to 85°C and quaternized for 24 hours. After filtration, the product was added to 700 mL of 110 g / L sodium hydroxide aqueous solution and heated to 90°C. The product was stirred and hydrolyzed for 4 hours. The solution was poured into ethanol, filtered, washed with ethanol, and dried to obtain the bisquaternary ammonium salt carboxylated cellulose finishing agent.

[0035] (4) Add 10L of water and 500g of quaternary ammonium salt carboxycellulose finishing agent to the container, stir, and then add cotton fabric. The bath ratio is 1:40. Perform two dips and two nips with a nip rate of 80%. Then pre-dry at 90℃ for 4min and bake at 165℃ for 3min to obtain cool and breathable clothing fabric.

[0036] Comparative Example 1:

[0037] (1) Add 10L of water and 200g of carboxymethyl cellulose to a container, stir, and then add cotton fabric. The bath ratio is 1:50. Perform two dips and two nips with a nip rate of 90%. Then pre-dry at 80℃ for 3 minutes and bake at 160℃ for 3 minutes to obtain the clothing fabric.

[0038] Comparative Example 2:

[0039] (1) Add 600 mL of 120 g / L sodium hydroxide aqueous solution and 40 g of maleate modified cellulose to a flask equipped with a reflux condenser, heat to 80 °C, stir and hydrolyze for 6 h, pour the solution into ethanol, filter, wash the product with ethanol, and dry to obtain dicarboxylic cellulose finishing agent.

[0040] (2) Add 10L of water and 200g of dicarboxylic cellulose finishing agent to the container, stir, and then add cotton fabric. The bath ratio is 1:50. Perform two dips and two nips with a nip rate of 90%. Then pre-dry at 80℃ for 3 minutes and bake at 160℃ for 3 minutes to obtain the clothing fabric.

[0041] Comparative Example 3:

[0042] (1) Add 500 mL of isopropanol, 40 g of carboxymethyl cellulose, 3.2 g of N-(3-chloro-2-hydroxypropyl)-N,N-dimethyl-N-dodecyl ammonium chloride and 0.45 g of sodium hydroxide to a flask equipped with a reflux condenser. Heat to 85 °C and react for 30 h. After filtration, add the product to 600 mL of 120 g / L sodium hydroxide aqueous solution. Heat to 80 °C and stir for 6 h to hydrolyze. Pour the solution into ethanol, filter, wash the product with ethanol, and dry to obtain quaternary ammonium salt carboxymethyl cellulose finishing agent.

[0043] (2) Add 10L of water and 200g of quaternary ammonium salt carboxycellulose finishing agent to the container, stir, and then add cotton fabric. The bath ratio is 1:50. Perform two dips and two nips with a nip rate of 90%. Then pre-dry at 80℃ for 3min and bake at 160℃ for 3min to obtain the clothing fabric.

[0044] Unprocessed cotton fabric was used as a control group.

[0045] Table 1 Performance of Cotton Fabrics

[0046]

[0047] Compared to untreated cotton fabrics, the various embodiments use a quaternary ammonium salt carboxycellulose finishing agent to treat the clothing fabrics. The finishing agent contains a large amount of hydrophilic sodium carboxylate and quaternary ammonium salt groups, which significantly improves the hydrophilicity and moisture regain of the cotton fabric, making it cooler and more comfortable to wear. In addition, the quaternary ammonium salt groups have a stronger antibacterial effect, which can effectively inhibit and kill bacteria and microorganisms, significantly improving the antibacterial performance of the fabric.

[0048] Comparative Example 1 uses conventional carboxymethyl cellulose to finish cotton fabrics. This method has a low carboxyl content and does not contain quaternary ammonium salt groups, resulting in low moisture regain and poor antibacterial properties. Comparative Example 2 uses a quaternary ammonium salt cellulose finishing agent that does not contain quaternary ammonium salt antibacterial groups, resulting in poor antibacterial properties. Comparative Example 3 uses conventional N-(3-chloro-2-hydroxypropyl)-N,N-dimethyl-N-dodecyl ammonium chloride to etherify carboxymethyl cellulose. This quaternary ammonium salt carboxymethyl cellulose finishing agent has low quaternary ammonium salt and sodium carboxylate groups, resulting in lower moisture regain and antibacterial rates compared to Example 1.

Claims

1. A method for preparing a cool-feeling and breathable clothing fabric, characterized in that, The preparation method includes: S1. Add isopropanol, maleate-modified cellulose, and N-(3-chloro-2-hydroxypropyl)-N,N-dimethyl-N-alkylammonium chloride to a flask equipped with a reflux condenser. Heat to 80-85℃ and react for 24-36 hours. After filtration, add the product to an aqueous sodium hydroxide solution and heat to 80-90℃. Stir and hydrolyze for 4-6 hours. Pour the solution into ethanol, filter, wash the product, and dry to obtain a bisquaternary ammonium salt carboxylated cellulose finishing agent. S2. Add water and bisquaternary ammonium salt carboxycellulose finishing agent to the container, stir and then add cotton fabric. The bath ratio is 1:(40-50). Perform two dips and two nips with a nip rate of 80-90%. Then pre-dry at 80-90℃ for 3-5 minutes and bake at 155-165℃ for 3-4 minutes to obtain cool and breathable clothing fabric. The method for preparing the maleate-modified cellulose includes: (1) Add tetrahydrofuran, cellulose, and 3-methylaminopropionic acid to a flask, stir, and then add 4-dimethylaminopyridine and dicyclohexylcarbodiimide. Stir the reaction at 20-30℃ for 18-24h, pour the solution into ethanol, filter, wash the product, and dry to obtain methylaminopropionic acid cellulose. (2) Add N,N-dimethylformamide, methylaminopropionate cellulose and dimethyl maleate to a flask, heat to 40-50℃, stir for 8-12h, pour the solution into ethanol, filter, wash the product, dry, and obtain maleate modified cellulose. The ratio of cellulose, 3-methylaminopropionic acid, 4-dimethylaminopyridine, and dicyclohexylcarbodiimide in (1) is 100g:(2.1-10)g:(1.8-8.6)g:(4.4-20.8)g; The ratio of methylaminopropionic acid cellulose and dimethyl maleate in (2) is 100g:(3.2-16)g.

2. The method for preparing the cool-feeling and breathable clothing fabric according to claim 1, characterized in that, The ratio of maleate-modified cellulose and N-(3-chloro-2-hydroxypropyl)-N,N-dimethyl-N-dodecylammonium chloride in S1 is 100g:(8-30)g.

3. The method for preparing the cool-feeling and breathable clothing fabric according to claim 2, characterized in that, The structural formula of N-(3-chloro-2-hydroxypropyl)-N,N-dimethyl-N-alkylammonium chloride in S1 is: n is 12-16.

4. The method for preparing the cool-feeling and breathable clothing fabric according to claim 1, characterized in that, The concentration of the sodium hydroxide aqueous solution in S1 is 80-120 g / L.

5. The method for preparing the cool-feeling and breathable clothing fabric according to claim 1, characterized in that, The ratio of water to bisquaternary ammonium salt carboxycellulose finishing agent in S2 is 1L:(20-50)g.

6. A cool-feeling and breathable clothing fabric obtained by the preparation method according to any one of claims 1-5.

Images