Preparation method of anti-wrinkle hydrophobic anti-ultraviolet cotton fabric

Abstract

The invention relates to the field of textile dyeing and finishing, in particular to a preparation method of an anti-wrinkle, hydrophobic and anti-ultraviolet cotton fabric, which mainly comprises the following steps: jointly acting an epoxy amine crosslinking agent and double-end sulfydryl polyethylene glycol on the cotton fabric, and reacting under the action of a catalyst to obtain the anti-wrinkle, hydrophobic and anti-ultraviolet cotton fabric. After ring opening, the epoxy group can react with sulfydryl in the double-end sulfydryl polyethylene glycol and hydroxyl on the surface of the cotton fabric, a stable cross-linked structure is formed inside and outside the cotton fiber, and the crease resistance of the fabric is improved; after ring opening, an epoxy group and sulfydryl generate a thioether bond, the hydrophobic effect of the fabric is improved through an epoxy cross-linked structure and the thioether bond, and the fabric is softer in hand feeling through a polyethylene glycol structure. The prepared anti-wrinkle, hydrophobic and anti-ultraviolet cotton fabric has excellent anti-wrinkle, hydrophobic and anti-ultraviolet effects at the same time, is durable, anti-wrinkle, soft and comfortable, and is suitable for multiple fields.

Description

Technical Field

[0001] The invention relates to the field of textile dyeing and finishing, and in particular to a method for preparing wrinkle-resistant, hydrophobic and UV-proof cotton fabric. Background Art

[0002] Cotton fabric has been widely used in the field of home textiles and clothing because of its good hygroscopicity, air permeability and biodegradability. The textiles made of it are comfortable to wear and highly skin-friendly, and are loved by consumers. At present, with people's pursuit of functional textiles, the preparation of multifunctional cotton fabrics has also received more and more attention. Since cotton fabrics have the disadvantages of being easy to wrinkle, hydrophilic and easy to stain, and having poor UV protection, it is very necessary to develop cotton fabrics with anti-wrinkle, hydrophobic, UV protection and other functions to meet people's needs for convenient and diversified life.

[0003] In recent years, relevant research on the preparation of multifunctional cotton fabrics has made certain progress. The magazine "Carbohydratepolymers" 2013-96-435 reported that 3,3,4,4-benzophenonetetracarboxylic acid (BPTCA) was used as a cross-linking agent to react with the hydroxyl groups on the fiber to make the cotton fabric wrinkle-resistant. At the same time, BPTCA has the function of absorbing ultraviolet rays, providing ultraviolet protection for cotton fabrics. The magazine "Journal of Environmental Chemical Engineering" used a simple dip coating method to prepare Ag / PDMS coating on the fabric to produce multifunctional fabrics with hydrophobic, UV and antibacterial properties. The magazine "Journal of Cleaner Production" 2022-372-133712 reported that cotton fabrics were coated with colored nanospheres / PMHS films to give cotton fabrics excellent UV resistance and hydrophobicity. However, the cost of the above-mentioned Ag and nanospheres is too high, which is not conducive to the actual production of cotton fabrics.

[0004] In summary, based on the similarities and differences in the mechanisms of anti-wrinkle, hydrophobic and anti-ultraviolet properties of cotton fabrics, researchers tend to prepare cotton fabrics with anti-wrinkle and anti-ultraviolet properties as well as cotton fabrics with hydrophobic and anti-ultraviolet properties, while no research on the preparation of cotton fabrics with anti-wrinkle, hydrophobic and anti-ultraviolet properties has been reported. Summary of the invention

[0005] In order to solve the problems existing in the prior art, the present invention provides a method for preparing a wrinkle-resistant, hydrophobic and UV-proof cotton fabric, which not only gives the cotton fabric multiple functionalities, but also makes the cotton fabric wrinkle-resistant and hydrophobic while making the fiber softer and having a better hand feel.

[0006] In order to solve the above technical problems, the present invention adopts the following technical solutions: One of the purposes of the present invention is to provide a wrinkle-resistant, hydrophobic and UV-resistant cotton fabric. After being treated with an epoxyamine crosslinking agent and double-terminated thiol polyethylene glycol, the cotton fabric has excellent wrinkle-resistant, hydrophobic and UV-resistant properties. The wrinkle recovery angle of the cotton fabric is greater than 160°, the water contact angle is greater than 120°, the UV protection factor is higher than 30, the bending stiffness is lower than 6, and the cotton fabric is durable, wrinkle-resistant and soft and comfortable. At the same time, the cotton fabric does not release formaldehyde during preparation and subsequent use.

[0007] The second object of the present invention is to provide a method for preparing a wrinkle-resistant, hydrophobic and UV-proof cotton fabric, the preparation method comprising the following steps: S1. Add hexamethylenediamine solution into a reaction kettle, add epichlorohydrin dropwise while stirring under ice bath condition, keep warm at 60-70°C for 3-5h after the addition, then cool to 20-30°C, slowly add hydrochloric acid solution to adjust the pH value to 2-3 to obtain the product, and purify with anhydrous ethanol to obtain an epoxyamine crosslinking agent; S2, dissolving an epoxyamine crosslinking agent and double-terminated thiol polyethylene glycol in water to prepare a crosslinking agent solution; S3, padding the cotton fabric with a cross-linking agent solution; S4, drying the cotton fabric treated in S3 at 90-100°C for 3-6 minutes; S5, padding the cotton fabric treated in S4 with a catalyst solution; S6, placing the cotton fabric treated in S5 in a high temperature drying machine for baking; S7. Wash the cotton fabric treated by S6 in cold water for 3 to 5 minutes, wash it in hot water at 50 to 60°C for 2 to 5 minutes, soap it in hot water at 100°C for 8 to 12 minutes using 1g / L standard soap flakes, wash it in hot water at 70 to 80°C for 2 to 5 minutes, rinse it in cold water, and dry it to obtain wrinkle-resistant, hydrophobic, and UV-resistant cotton fabric.

[0008] Preferably, the molar ratio of epichlorohydrin to hexamethylenediamine in S1 is 3-4:1.05-1.15.

[0009] Preferably, the temperature of the ice bath in S1 is 5-10° C.; and the dripping rate of the epichlorohydrin is 10-30 ml / min.

[0010] Preferably, the mass fraction of the hexamethylenediamine solution in S1 is 2-6%.

[0011] Preferably, the concentration of the hydrochloric acid solution in S1 is 0.1-0.5 mol / L.

[0012] Preferably, the concentration of the epoxyamine crosslinking agent in the crosslinking agent solution in S2 is 1 to 100 g / L; the added amount of the double-terminated mercapto polyethylene glycol is 25 to 50% of the mass of the epoxyamine crosslinking agent.

[0013] Preferably, the rolling rate of the cross-linking agent solution in S3 is in the range of 60 to 120%.

[0014] Preferably, the catalyst in S5 is one or a combination of sodium hydroxide, sodium carbonate, sodium bicarbonate, potassium hydroxide, sodium silicate, sodium dihydrogen phosphate; the concentration of the catalyst solution is 10-40 g / L, and the rolling rate of the impregnated catalyst solution ranges from 60 to 120%.

[0015] Preferably, the baking temperature in S6 is in the range of 80 to 200° C., and the baking time is in the range of 10 to 900 s.

[0016] Epoxyamine crosslinking agents contain active epoxy groups and amino groups, which can act on cotton fabrics through ring-opening reactions, crosslink with hydroxyl groups on the surface of cotton fabrics to form a network structure, giving the fabric excellent wrinkle resistance, hydrophobicity and UV resistance. However, after epoxyamine crosslinking agents act on cotton fabrics, the fabric feels poor and the softness is reduced. Therefore, epoxyamine crosslinking agents and double-terminated thiol polyethylene glycol are used together on cotton fabrics. Under the action of a catalyst, the epoxy groups can react with the thiol groups in the double-terminated thiol polyethylene glycol and the hydroxyl groups on the surface of cotton fabrics after ring opening, forming a stable crosslinking structure inside and outside the cotton fibers, thereby improving the wrinkle resistance of the fabric; after the epoxy groups are ring-opened, they form thioether bonds with thiol groups, and the epoxy crosslinking structure and thioether bonds improve the hydrophobic effect of the fabric, while the polyethylene glycol structure makes the fabric feel softer.

[0017] Due to the adoption of the above technical solution, the technical effects achieved by the present invention are: 1. The wrinkle-resistant, hydrophobic and UV-proof cotton fabric of the present invention has excellent wrinkle-resistant, hydrophobic and UV-proof effects, wherein the wrinkle recovery angle of the cotton fabric is greater than 160°, the water contact angle is greater than 120°, and the UV protection factor value is greater than 30.

[0018] 2. The anti-wrinkle, hydrophobic and anti-ultraviolet cotton fabric of the present invention has a bending stiffness of less than 6 cm, and is durable, anti-wrinkle and soft and comfortable.

[0019] 3. In the present invention, the wrinkle-resistant, hydrophobic and UV-proof cotton fabric does not release formaldehyde during the preparation and subsequent use, making the fabric more environmentally friendly.

[0020] 4. The method for preparing the wrinkle-resistant, hydrophobic and UV-proof cotton fabric of the present invention solves the problems of easy wrinkling, poor hydrophobicity and UV-proof performance of cotton fabric, and improves the added value of cotton fabric products.

[0021] 5. The present invention is low-cost, and can impart multiple properties to cotton fabrics through a one-step cross-linking method. The process is short, and the consumption of water and energy is reduced, thus having good economic and environmental benefits. DETAILED DESCRIPTION

[0022] The present invention is further described below in conjunction with specific embodiments.

[0023] Embodiment 1: A method for preparing a wrinkle-resistant, hydrophobic and UV-resistant cotton fabric, the preparation method comprising the following steps: S1. Add hexamethylenediamine solution into a reaction kettle, add epichlorohydrin dropwise while stirring under ice bath condition, keep the reaction at 65°C for 4h after the addition, then cool to 25°C, slowly add hydrochloric acid solution to adjust the pH value to 2 to obtain the product, and purify with anhydrous ethanol to obtain an epoxyamine crosslinking agent; S2, dissolving an epoxyamine crosslinking agent and double-terminated thiol polyethylene glycol in water to prepare a crosslinking agent solution; S3, padding the cotton fabric with a cross-linking agent solution; S4, drying the cotton fabric treated in S3 at 95°C for 5 min; S5, padding the cotton fabric treated in S4 with a catalyst solution; S6, placing the cotton fabric treated in S5 in a high temperature drying machine for baking; S7. Wash the cotton fabric treated with S6 in cold water for 3 minutes, wash it in 55°C hot water for 3 minutes, soap it in 100°C hot water for 10 minutes using 1g / L standard soap flakes, wash it in 75°C hot water for 2-5 minutes, rinse it in cold water, and dry it to obtain wrinkle-resistant, hydrophobic, and UV-resistant cotton fabric.

[0024] The molar ratio of epichlorohydrin to hexamethylenediamine in S1 is 3.5:1.1.

[0025] The temperature of the ice bath in S1 is 7° C.; the dripping rate of epichlorohydrin is 20 ml / min.

[0026] The mass fraction of the hexamethylenediamine solution in S1 is 4%.

[0027] The concentration of the hydrochloric acid solution in S1 is 0.3 mol / L.

[0028] The concentration of the epoxyamine crosslinking agent in the crosslinking agent solution in S2 is 10 g / L; the added amount of the double-terminated mercapto polyethylene glycol is 32% of the mass of the epoxyamine crosslinking agent.

[0029] The rolling rate of the cross-linking agent solution in S3 is 100%.

[0030] The catalyst in S5 is sodium carbonate, the concentration of the catalyst solution is 30 g / L, and the rolling rate of the catalyst solution is 100%.

[0031] The baking temperature range in S6 is 120° C., and the baking time range is 300 s.

[0032] The wrinkle recovery angle of the cotton fabric prepared in Example 1 can reach 181.3°, the water contact angle is 125.8°, the anti-ultraviolet UPF value is 32.58, and the bending rigidity measured by the fabric stiffness meter is 5.52 cm.

[0033] Embodiment 2: A method for preparing a wrinkle-resistant, hydrophobic, UV-resistant cotton fabric, the preparation method comprising the following steps: S1. Add hexamethylenediamine solution into a reaction kettle, add epichlorohydrin dropwise while stirring under ice bath condition, keep the reaction at 60°C for 3h after the addition, then cool to 20°C, slowly add hydrochloric acid solution to adjust the pH value to 3 to obtain the product, and purify with anhydrous ethanol to obtain an epoxyamine crosslinking agent; S2, dissolving an epoxyamine crosslinking agent and double-terminated thiol polyethylene glycol in water to prepare a crosslinking agent solution; S3, padding the cotton fabric with a cross-linking agent solution; S4, drying the cotton fabric treated in S3 at 90°C for 6 min; S5, padding the cotton fabric treated in S4 with a catalyst solution; S6, placing the cotton fabric treated in S5 in a high temperature drying machine for baking; S7. Wash the cotton fabric treated with S6 in cold water for 3 minutes, in 50°C hot water for 2 minutes, in 100°C hot water for 8 minutes using 1g / L standard soap flakes, in 70°C hot water for 5 minutes, rinse with cold water, and dry to obtain wrinkle-resistant, hydrophobic, and UV-resistant cotton fabric.

[0034] The molar ratio of epichlorohydrin to hexamethylenediamine in S1 is 3:1.05.

[0035] The temperature of the ice bath in S1 is 5° C.; the dropping rate of epichlorohydrin is 10 ml / min.

[0036] The mass fraction of the hexamethylenediamine solution in S1 is 2%.

[0037] The concentration of the hydrochloric acid solution in S1 is 0.1 mol / L.

[0038] The concentration of the epoxyamine crosslinking agent in the crosslinking agent solution in S2 is 10 g / L; the added amount of the double-terminated mercapto polyethylene glycol is 32% of the mass of the epoxyamine crosslinking agent.

[0039] The rolling rate of the cross-linking agent solution in S3 is in the range of 60%.

[0040] The catalyst in S5 is sodium carbonate; the concentration of the catalyst solution is 30 g / L, and the rolling rate of the catalyst solution is 60%.

[0041] The baking temperature range in S6 is 80° C., and the baking time range is 900 s.

[0042] The wrinkle recovery angle of the cotton fabric prepared in Example 2 can reach 180.7°, the water contact angle is 125.3°, the anti-ultraviolet UPF value is 32.1, and the bending rigidity measured by the fabric stiffness meter is 5.61 cm.

[0043] Embodiment 3 A method for preparing a wrinkle-resistant, hydrophobic and UV-resistant cotton fabric, the preparation method comprising the following steps: S1. Add hexamethylenediamine solution into a reaction kettle, add epichlorohydrin dropwise while stirring under ice bath condition, keep the reaction at 70°C for 5h after the addition, then cool to 30°C, slowly add hydrochloric acid solution to adjust the pH value to 3 to obtain the product, and purify with anhydrous ethanol to obtain an epoxyamine crosslinking agent; S2, dissolving an epoxyamine crosslinking agent and double-terminated thiol polyethylene glycol in water to prepare a crosslinking agent solution; S3, padding the cotton fabric with a cross-linking agent solution; S4, drying the cotton fabric treated in S3 at 100°C for 3 min; S5, padding the cotton fabric treated in S4 with a catalyst solution; S6, placing the cotton fabric treated in S5 in a high temperature drying machine for baking; S7. Wash the cotton fabric treated with S6 in cold water for 5 minutes, wash it in 60°C hot water for 5 minutes, soap it in 100°C hot water for 12 minutes using 1g / L standard soap flakes, wash it in 80°C hot water for 2 minutes, rinse it in cold water, and dry it to obtain wrinkle-resistant, hydrophobic, and UV-resistant cotton fabric.

[0044] The molar ratio of epichlorohydrin to hexamethylenediamine in S1 is 4:1.15.

[0045] The temperature of the ice bath in S1 is 10° C.; the dripping rate of the epichlorohydrin is 30 ml / min.

[0046] The mass fraction of the hexamethylenediamine solution in S1 is 6%.

[0047] The concentration of the hydrochloric acid solution in S1 is 0.5 mol / L.

[0048] The concentration of the epoxyamine crosslinking agent in the crosslinking agent solution in S2 is 10 g / L; the added amount of the double-terminated mercapto polyethylene glycol is 32% of the mass of the epoxyamine crosslinking agent.

[0049] The rolling rate of the cross-linking agent solution in S3 is in the range of 120%.

[0050] The catalyst in S5 is sodium carbonate; the concentration of the catalyst solution is 30 g / L, and the rolling rate of the catalyst solution is 120%.

[0051] The baking temperature range in S6 is 200° C., and the baking time range is 10 s.

[0052] The wrinkle recovery angle of the cotton fabric prepared in Example 3 can reach 181.4°, the water contact angle is 125.5°, the anti-ultraviolet UPF value is 32, and the bending rigidity measured by the fabric stiffness meter is 5.57 cm.

[0053] Example 4 The representative Example 1 was selected as Example 4, and the concentration of the epoxyamine crosslinking agent in the crosslinking agent solution in S2 was changed to 20 g / L, while the rest remained unchanged.

[0054] The wrinkle recovery angle of the cotton fabric prepared in Example 4 can reach 203.7°, the water contact angle is 129.1°, the anti-ultraviolet UPF value is 39.86, and the bending rigidity measured by the fabric stiffness meter is 5.48 cm.

[0055] Example 5 The representative Example 1 was selected as Example 5, and the concentration of the epoxyamine crosslinking agent in the crosslinking agent solution in S2 was changed to 40 g / L, while the rest remained unchanged.

[0056] The wrinkle recovery angle of the cotton fabric prepared in Example 5 can reach 221.4°, the water contact angle is 132.8°, the anti-ultraviolet UPF value is 44.31, and the bending rigidity measured by the fabric stiffness meter is 5.42 cm.

[0057] Example 6 The representative Example 1 was selected as Example 6, and the concentration of the epoxyamine crosslinking agent in the crosslinking agent solution in S2 was changed to 60 g / L, while the rest remained unchanged.

[0058] The wrinkle recovery angle of the cotton fabric prepared in Example 6 can reach 238.8°, the water contact angle is 135.2°, the anti-ultraviolet UPF value is 48.63, and the bending rigidity measured by the fabric stiffness meter is 5.38 cm.

[0059] Example 7 The representative Example 1 was selected as Example 7, and the concentration of the epoxyamine crosslinking agent in the crosslinking agent solution in S2 was changed to 80 g / L, while the rest remained unchanged.

[0060] The wrinkle recovery angle of the cotton fabric prepared in Example 7 can reach 250.7°, the water contact angle is 137.9°, the anti-ultraviolet UPF value is 51.11, and the bending rigidity measured by the fabric stiffness meter is 5.31 cm.

[0061] Example 8 The representative Example 1 was selected as Example 8, and the concentration of the epoxyamine crosslinking agent in the crosslinking agent solution in S2 was changed to 100 g / L, while the rest remained unchanged.

[0062] The wrinkle recovery angle of the cotton fabric prepared in Example 8 can reach 254.2°, the water contact angle is 138.7°, the anti-ultraviolet UPF value is 52.79, and the bending rigidity measured by the fabric stiffness meter is 5.29 cm.

[0063] Example 9 The representative Example 1 is selected as Example 9, in which the amount of the double-terminated mercapto polyethylene glycol added in S2 is changed to 25% of the mass of the epoxyamine crosslinking agent, and the rest remains unchanged.

[0064] The wrinkle recovery angle of the cotton fabric prepared in Example 9 can reach 177.4°, the water contact angle is 122.6°, the anti-ultraviolet UPF value is 31.6, and the bending rigidity measured by the fabric stiffness meter is 5.37 cm.

[0065] Example 10 The representative Example 1 is selected, and the amount of the double-terminated mercapto polyethylene glycol added in S2 is changed to 40% of the mass of the epoxyamine cross-linking agent, and the rest remains unchanged, as Example 10.

[0066] The wrinkle recovery angle of the cotton fabric prepared in Example 10 can reach 195.2°, the water contact angle is 134.8°, the anti-ultraviolet UPF value is 36.5, and the bending rigidity measured by the fabric stiffness meter is 5.16 cm.

[0067] Embodiment 11 The representative Example 1 is selected as Example 11, in which the amount of double-terminated mercapto polyethylene glycol added in S2 is changed to 50% of the mass of the epoxyamine cross-linking agent, and the rest remains unchanged.

[0068] The wrinkle recovery angle of the cotton fabric prepared in Example 11 can reach 184.5°, the water contact angle is 128.9, the anti-ultraviolet UPF value is 35.26, and the bending rigidity measured by the fabric stiffness meter is 5.43 cm.

[0069] Example 12 Representative Example 7 was selected, and the concentration of the catalyst solution in S5 was changed to 10 g / L, while the rest remained unchanged, as Example 12.

[0070] The wrinkle recovery angle of the cotton fabric prepared in Example 12 can reach 212.7°, the water contact angle is 124.5°, the anti-ultraviolet UPF value is 38.87, and the bending rigidity measured by the fabric stiffness meter is 5.72 cm.

[0071] Embodiment 13 Representative Example 7 was selected, and the concentration of the catalyst solution in S5 was changed to 20 g / L, while the rest remained unchanged, as Example 13.

[0072] The wrinkle recovery angle of the cotton fabric prepared in Example 13 can reach 241.3°, the water contact angle is 132.5°, the anti-ultraviolet UPF value is 46.22, and the bending rigidity measured by the fabric stiffness meter is 5.48 cm.

[0073] Embodiment 14 Representative Example 7 was selected, and the concentration of the catalyst solution in S5 was changed to 40 g / L, while the rest remained unchanged, as Example 14.

[0074] The wrinkle recovery angle of the cotton fabric prepared in Example 14 can reach 235.1°, the water contact angle is 131.5°, the anti-ultraviolet UPF value is 44.01, and the bending rigidity measured by the fabric stiffness meter is 5.54 cm.

[0075] Comparative Example 1 Select the representative Example 1, replace the crosslinking agent solution in S2 with water, and the rest are consistent with Example 1. As Comparative Example 1, the wrinkle recovery angle of the prepared cotton fabric can reach 170.9°, the water contact angle is 0°, the anti-ultraviolet UPF value is 21.52, and the bending stiffness is 5.96 cm.

[0076] Comparative Example 2 Representative Example 7 was selected, and the catalyst solution in S5 was replaced with water. The rest was consistent with Example 7. As Comparative Example 2, the wrinkle recovery angle of the prepared cotton fabric could reach 175.2°, the water contact angle was 0°, the anti-ultraviolet UPF value was 22.96, and the bending stiffness was 6.02 cm.

[0077] Comparative Example 3 Representative Example 1 was selected, and the double-terminated mercapto polyethylene glycol in S2 was removed. The rest was consistent with Example 5. As Comparative Example 3, the wrinkle recovery angle of the prepared cotton fabric can reach 232.1°, the water contact angle is 124.6°, the anti-ultraviolet UPF value is 46.2, and the flexural rigidity measured by the fabric stiffness meter is 6.36 cm.

[0078] According to GB / T 3819-1997 standard, the wrinkle recovery angles of fabrics treated in different comparative examples and embodiments were tested using a YG541L digital fabric wrinkle elasticity tester. The same fabric was tested 6 times and the average value was taken.

[0079] The water contact angle of fabrics treated with different comparative examples and embodiments was measured using an OCA5pro contact angle meter. The same fabric was tested 10 times and the average value was taken.

[0080] The anti-ultraviolet performance of fabrics treated with different comparative examples and embodiments was tested using a YG909-III textile anti-ultraviolet instrument to obtain the ultraviolet protection factor (UPF) of the samples. Each sample was tested five times and the average value was taken.

[0081] The flexural rigidity of fabrics treated in different comparative examples and embodiments was tested using a YM207 fabric stiffness tester. The same fabric was tested five times and the average value was taken.

[0082] Table 1 Various properties of cotton fabrics treated in Comparative Example 1, Examples 1, 4-8 According to the data in Table 1, after being treated with the crosslinker, the wrinkle recovery, hydrophobic and UV resistance of the cotton fabric are improved. In addition, with the increase of the crosslinker concentration, the wrinkle recovery angle, water contact angle, UPF value and softness of the fabric continue to increase; when the crosslinker concentration reaches 80g / L, the wrinkle recovery angle, water contact angle, UPF value and bending stiffness of the fabric are 250.7°, 137.9°, 51.11 and 5.31cm respectively; with the continuous increase of the crosslinker concentration, the wrinkle recovery angle, water contact angle and UPF value of the cotton fabric basically do not change.

[0083] Table 2 Various properties of cotton fabrics treated in Comparative Example 2, Examples 7, 12-14 According to the data in Table 2, the crosslinking agent and the double-terminated thiol polyethylene glycol can react covalently with the cotton fiber under the catalysis of the sodium carbonate solution, thereby improving the wrinkle resistance, hydrophobicity and UV resistance of the cotton fabric. In addition, with the increase of the concentration of the sodium carbonate solution, the wrinkle recovery angle, water contact angle, softness and UPF value of the fabric continue to increase; when the concentration of the sodium carbonate solution is 30g / L, the wrinkle recovery angle, water contact angle, UPF value and bending stiffness of the fabric are the best, which are 250.7, 137.9, 51.11 and 5.31cm respectively; as the concentration of the sodium carbonate solution continues to increase, the wrinkle recovery angle, water contact angle, softness and UPF value of the fabric begin to decrease.

[0084] Table 3, Comparative Example 3, Examples 1, and various properties of cotton fabrics treated with 9-11 According to the data in Table 3, as the amount of double-terminated mercapto polyethylene glycol added increases, the wrinkle recovery angle, water contact angle, softness and UPF value of the fabric continue to improve, and the performance effects are best when the addition amount is 40%. This is because the addition of double-terminated mercapto polyethylene glycol increases the cross-linking structure, making the fabric more wrinkle-resistant, and the thioether bond has a certain hydrophobic and anti-ultraviolet effect, so the hydrophobic and anti-ultraviolet effects of the embodiment are better; the flexural rigidity of comparative example 3 is significantly increased, indicating that the addition of double-terminated mercapto polyethylene glycol makes the fabric softer.

[0085] Unless otherwise specified, the ratios and percentages described in the present invention are all weight ratios and weight percentages; and the raw materials are all commercially available.

[0086] Finally, it should be noted that the above is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention is described in detail with reference to the aforementioned embodiments, those skilled in the art can still modify the technical solutions described in the aforementioned embodiments or replace some of the technical features therein by equivalents. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A method for preparing wrinkle-resistant, hydrophobic and UV-proof cotton fabric, characterized in that: The preparation method comprises the following steps: S1. Add hexamethylenediamine solution into a reaction kettle, add epichlorohydrin dropwise while stirring under ice bath condition, keep warm at 60-70°C for 3-5h after the addition, then cool to 20-30°C, slowly add hydrochloric acid solution to adjust the pH value to 2-3 to obtain the product, and purify with anhydrous ethanol to obtain an epoxyamine crosslinking agent; S2, dissolving an epoxyamine crosslinking agent and double-terminated thiol polyethylene glycol in water to prepare a crosslinking agent solution; S3, padding the cotton fabric with a cross-linking agent solution; S4, drying the cotton fabric treated in S3 at 90-100°C for 3-6 minutes; S5, padding the cotton fabric treated in S4 with a catalyst solution; S6, placing the cotton fabric treated in S5 in a high temperature drying machine for baking; S7. Wash the cotton fabric treated by S6 in cold water for 3 to 5 minutes, wash it in hot water at 50 to 60°C for 2 to 5 minutes, soap it in hot water at 100°C for 8 to 12 minutes using 1g / L standard soap flakes, wash it in hot water at 70 to 80°C for 2 to 5 minutes, rinse it in cold water, and dry it to obtain wrinkle-resistant, hydrophobic, and UV-resistant cotton fabric.

2. The method for preparing a wrinkle-resistant, hydrophobic and UV-proof cotton fabric according to claim 1, characterized in that: The molar ratio of epichlorohydrin to hexamethylenediamine in S1 is 3-4:1.05-1.

15.

3. The method for preparing a wrinkle-resistant, hydrophobic and UV-proof cotton fabric according to claim 1, characterized in that: The temperature of the ice bath in S1 is 5-10° C.; the dripping rate of the epichlorohydrin is 10-30 ml / min.

4. The method for preparing a wrinkle-resistant, hydrophobic and UV-proof cotton fabric according to claim 1, characterized in that: The mass fraction of the hexamethylenediamine solution in S1 is 2-6%, and the concentration of the hydrochloric acid solution is 0.1-0.5 mol / L.

5. The method for preparing a wrinkle-resistant, hydrophobic and UV-proof cotton fabric according to claim 1, characterized in that: The concentration of the epoxyamine crosslinking agent in the crosslinking agent solution in S2 is 1 to 100 g / L.

6. The method for preparing a wrinkle-resistant, hydrophobic and UV-proof cotton fabric according to claim 1, characterized in that: The added amount of the double-terminated mercapto polyethylene glycol is 25-50% of the mass of the epoxyamine cross-linking agent.

7. The method for preparing a wrinkle-resistant, hydrophobic and UV-proof cotton fabric according to claim 1, characterized in that: The rolling rate of the cross-linking agent solution in S3 is in the range of 60-120%.

8. The method for preparing a wrinkle-resistant, hydrophobic and UV-proof cotton fabric according to claim 1, characterized in that: The catalyst in S5 is one or a combination of sodium hydroxide, sodium carbonate, sodium bicarbonate, potassium hydroxide, sodium silicate, and sodium dihydrogen phosphate.

9. The method for preparing a wrinkle-resistant, hydrophobic and UV-proof cotton fabric according to claim 1, characterized in that: The concentration of the catalyst solution is 10-40 g / L, and the rolling rate of the catalyst solution is in the range of 60-120%.

10. The method for preparing a wrinkle-resistant, hydrophobic and UV-proof cotton fabric according to claim 1, characterized in that: The baking temperature in S6 is in the range of 80 to 200° C., and the baking time is in the range of 10 to 900 seconds.

Images