Anti-ultraviolet composite functional fabric and preparation method thereof

Abstract

This invention discloses an anti-ultraviolet composite functional fabric and its preparation method. The preparation method includes the following steps: (1) impregnating the fabric with silica sol, one impregnation and one padding, with a padding rate of 80%, and drying at 100℃; (2) preparing a color paste; by mass, the color paste consists of 6 parts silica sol, 20 parts binder, 1-2 parts thickener, 2 parts cationic coating color paste, and 70 parts water; first, add the thickener to the water and stir to thicken, then add the binder and silica sol and stir evenly, then add the cationic coating color paste to form a color paste with a viscosity of 8000-10000 mPa·s; (3) coating the fabric surface (single side) with the color paste; (4) drying and baking to obtain the anti-ultraviolet composite functional fabric. This invention improves the anti-ultraviolet and antistatic properties of the fabric by impregnating and coating the fabric with a finishing agent containing quaternary ammonium salt and silica sol.

Description

Technical Field

[0001] This invention relates to an anti-ultraviolet composite functional fabric and its preparation method, belonging to the field of functional textile fabrics. Background Technology

[0002] Polyester fiber is the most widely used chemical fiber, extensively applied in clothing fabrics, decorative fabrics, and industrial textiles. However, due to its high insulation, low moisture regain, and poor hygroscopicity, polyester easily generates and accumulates static electricity during production and use due to friction. This static electricity is difficult to dissipate, affecting the performance of polyester fabrics and reducing their quality. Ultraviolet (UV) radiation can penetrate clothing and the surface of human skin, causing harm. Therefore, UV-protective treatment of fibers and fabrics is necessary to enhance their UV resistance and reduce or eliminate skin damage. Fabrics are a powerful barrier protecting the human body from UV damage; therefore, it is essential to develop fabrics with UV resistance and antistatic properties. Summary of the Invention

[0003] The purpose of this invention is to provide an anti-ultraviolet composite functional fabric and its preparation method, which endows the fabric with functions such as anti-ultraviolet properties through functional finishing processes.

[0004] To achieve the above objectives, the present invention adopts the following technical solution.

[0005] A method for preparing an anti-ultraviolet composite functional fabric includes the following steps:

[0006] (1) The fabric is impregnated with silica sol and then dried;

[0007] (2) Prepare color paste;

[0008] (3) Coat the fabric surface with color paste;

[0009] (4) Drying and baking are used to obtain UV-resistant composite functional fabric.

[0010] The silica sol is prepared by the following method:

[0011] First, 16 parts of tetraethyl orthosilicate, 8 parts of SiPBPQAS monomer, and 20 parts of ethanol were added to 260 parts of distilled water, and the pH was adjusted to 5 with hydrochloric acid. After keeping the solution at 30°C for 20 hours, the solution was cooled to obtain silica sol.

[0012] The pigment paste, by weight, consists of 6 parts silica sol, 12 parts binder, 1-2 parts thickener, 2 parts cationic coating pigment paste, and 80 parts water.

[0013] The preparation method of the color paste is as follows: add a thickener to water and stir to thicken; then add a binder and silica sol and stir evenly; then add cationic coating color paste to form a color paste with a viscosity of 8000-10000 mPa·s.

[0014] An anti-ultraviolet composite functional fabric is made by the above-described preparation method.

[0015] This invention improves the fabric's UV resistance and antistatic properties by impregnating and coating it with a finishing agent containing quaternary ammonium salts and silica sol.

[0016] Quaternary ammonium salts have good antistatic properties and can accelerate the dissipation of static electricity; silica sol and pigments form a film on the fabric surface, increasing the contact gap between the fabric and the friction object, reducing the contact area, and lowering the coefficient of friction, thereby inhibiting the accumulation of static electricity.

[0017] Nano-silica can effectively block ultraviolet rays and, in synergy with benzophenone derivatives that absorb ultraviolet rays, enhances the fabric's UV protection performance. Detailed Implementation

[0018] The "parts" mentioned in this invention refer to "parts by mass".

[0019] This invention discloses an anti-ultraviolet composite functional fabric and its preparation method.

[0020] A method for preparing an anti-ultraviolet composite functional fabric includes the following steps:

[0021] (1) The fabric is impregnated with silica sol, one impregnation and one rolling, with a roll-off rate of 80%, and dried at 100℃.

[0022] (2) Prepare color paste;

[0023] By weight, the color paste consists of 6 parts silica sol, 12 parts binder, 1-2 parts thickener, 2 parts cationic coating color paste, and 80 parts water. First, add the thickener to the water and stir to thicken. Then add the binder and silica sol and stir evenly. Finally, add the cationic coating color paste to form a color paste with a viscosity of 8000-10000 mPa·s.

[0024] (3) Coat the fabric surface (single side) with color paste;

[0025] (4) Drying and baking are used to obtain UV-resistant composite functional fabric.

[0026] The adhesive is a commercially available conventional cationic adhesive.

[0027] The thickener mentioned is a commercially available conventional cationic thickener.

[0028] The cationic coating pigment is a commercially available, conventional product.

[0029] The silica sol is prepared by the following method:

[0030] First, 16 parts of tetraethyl orthosilicate, 8 parts of SiPBPQAS monomer, and 20 parts of ethanol were added to 260 parts of distilled water, and the pH was adjusted to 5 with hydrochloric acid. After keeping the solution at 30°C for 20 hours, the solution was cooled to obtain silica sol.

[0031] The SiPBPQAS monomer is prepared by the following method:

[0032] Add 0.1 mol of diethyl chlorophosphonate and 50 mL of tetrahydrofuran to a clean three-necked flask. Under nitrogen protection in an ice bath, add 0.1 mol of N,N-dimethylethanolamine and 0.1 mol of triethylamine. Stir the mixture in an ice bath for 4 h. After the reaction is complete, if there is a precipitate, filter it and remove the tetrahydrofuran by vacuum distillation. Add 0.1 mol of γ-(2,3-epoxypropoxy)propyltrimethoxysilane and 100 mL of isopropanol to the above product. Stir and mix well, and reflux at 70 °C for 10 h. After the reaction is complete, remove the isopropanol by rotary evaporation to obtain the intermediate product SiPQAS monomer. The reaction process is shown in reaction formula 1.

[0033] A measured amount of 4-hydroxybenzophenone and IPDI (isophorone diisocyanate) were loaded into a reactor, protected by nitrogen gas, and a small amount of dibutyltin dilaurate was added to catalyze the reaction. The temperature was slowly raised to 70°C, and the reaction was carried out for about 2 hours until the isocyanate value reached the theoretical content. A measured amount of SiPQAS monomer was added, and the reaction was continued until the isocyanate value reached the new theoretical content, yielding the product SiPBPQAS monomer. The molar ratio of 4-hydroxybenzophenone, IPDI, and SiPQAS monomer was 1:1:1. The reaction process is shown in reaction formula 2.

[0034]

[0035] Example 1:

[0036] A method for preparing an anti-ultraviolet composite functional fabric includes the following steps:

[0037] (1) The fabric is impregnated with silica sol, one impregnation and one rolling, with a roll-off rate of 80%, and dried at 100℃.

[0038] (2) Prepare color paste;

[0039] By weight, the color paste consists of 6 parts silica sol, 12 parts binder EM-049, 1-2 parts thickener FS-3405, 2 parts cationic coating color paste LN2029, and 80 parts water. First, add the thickener to the water and stir to thicken. Then add the binder and silica sol and stir evenly. Finally, add the cationic coating color paste to form a color paste with a viscosity of 8000-10000 mPa·s.

[0040] (3) Coat the fabric surface with color paste;

[0041] (4) Drying at 100℃ and baking at 150℃ to obtain UV-resistant composite functional fabric.

[0042] The silica sol is prepared by adding 16 parts of tetraethyl orthosilicate, 8 parts of SiPBPQAS monomer, and 20 parts of ethanol to 260 parts of distilled water, adjusting the pH to 5 with hydrochloric acid, and then cooling it at 30°C for 20 hours to obtain the silica sol.

[0043] The fabric is a polyester twill stretch fabric, 140D+40D*140D+40D, 215g / m². 2 .

[0044] The UV protection and antistatic properties of the fabric prepared by the method in Example 1 were tested, and the relevant properties are as follows:

[0045] UV protection performance: UPF value > 50;

[0046] Antistatic properties: Surface triboelectric voltage 37V, surface electrostatic half-life <1s.

[0047] An inductive electrostatic tester is used to test the surface triboelectric voltage and surface electrostatic half-life of fabrics.

[0048] UV protection performance: The UV protection factor (UPF) of the fabric is tested using a UV protection factor tester.

Claims

1. A method for preparing an anti-ultraviolet composite functional fabric, comprising the following steps: (1) The fabric is impregnated with silica sol and then dried; (2) Prepare color paste; (3) Coat the fabric surface with color paste; (4) Drying and baking are used to obtain UV-resistant composite functional fabric.

2. The method for preparing an anti-UV composite functional fabric as described in claim 1, characterized in that, The silica sol is prepared by the following method: First, add 16 parts of tetraethyl orthosilicate, 8 parts of SiPBPQAS monomer, and 20 parts of ethanol to 260 parts of distilled water, and adjust the pH value to 5 with hydrochloric acid. After holding at 30°C for 20 hours and then cooling, silica sol was obtained.

3. The method for preparing an anti-UV composite functional fabric as described in claim 1, characterized in that: The color paste, by weight, consists of 6 parts silica sol, 12 parts binder, 1-2 parts thickener, 2 parts cationic coating color paste, and 80 parts water. The preparation method of the color paste is as follows: add thickener to water and stir to thicken; then add binder and silica sol and stir evenly; then add cationic coating color paste to form a color paste with a viscosity of 8000-10000 mPa·s.

4. A UV-resistant composite functional fabric, characterized in that, It is prepared by the preparation method described in any one of claims 1 to 3.

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