Functional fabric and preparation method thereof

Abstract

The invention discloses a method for preparing a functional fabric, which comprises blending polyester fiber and modified stone fiber, and then immersing the fabric into a finishing liquid for impregnation to obtain the functional fabric; the method for preparing the modified stone fiber comprises the following steps: heating basalt, bauxite, quartz sand, apatite and albite until the stones are melted, stretching through a wire drawing plate, and twisting the original yarn to obtain the stone fiber; immersing the stone fiber into an impregnation liquid, then adding ammonia water, and treating to obtain the modified stone fiber; the method for preparing the finishing liquid comprises the following steps: dispersing modified nano ZnO / tourmaline into deionized water, stirring evenly, adding a silane coupling agent and waterborne polyurethane, and mixing evenly again to obtain a finishing liquid; the prepared functional fabric has excellent mechanical properties and flame retardant properties, good ultraviolet shielding effect, and certain health care functions.

Description

Technical Field

[0001] The invention relates to the field of fabric preparation, and in particular to a functional fabric and a preparation method thereof. Background Art

[0002] With the development of science and technology and the textile industry, the types of fabrics have gradually increased, and the flame retardant properties of fabrics have become one of the factors to measure quality. Currently, there are two main methods to make fabrics flame retardant. One is to use inherently flame retardant fibers to make fabrics, and the other is to make flame retardant modifications to fibers or fabrics.

[0003] Basalt fiber is an inorganic fiber made by high-speed drawing of basalt stone (an ancient volcanic rock) into a molten state at 1450-1500°C. It has many excellent properties, such as excellent strength and high temperature resistance, as well as electrical insulation and corrosion resistance.

[0004] Chinese patent document CN110512337B discloses a flame-retardant and heat-insulating fabric blended with basalt fiber and aramid fiber and its manufacturing method. By blending basalt fiber with aramid fiber, the advantages of basalt fiber such as non-flammability, high temperature resistance, no toxic gas discharge, good insulation, no melting or dripping, no thermal shrinkage, etc. and the advantages of aramid fiber such as high strength, high modulus, and anti-aging are well combined, which greatly improves the flame-retardant and heat-insulating performance of the fabric and greatly reduces the cost of the flame-retardant and heat-insulating fabric. However, basalt fiber has many burrs on the surface and poor toughness, and the fabric directly woven from it has poor wearability, so it is necessary to improve the fiber.

[0005] Polyester fiber is widely used in clothing and decoration due to its good mechanical properties, chemical stability, spinnability and low cost. However, polyester fiber itself is flammable and easily produces molten droplets when burned, which limits its application in the field of decorative textiles.

[0006] Chinese patent document CN104988718B discloses a flame retardant finishing method for high-speed rail and train seat fleece polyester fabrics. The fleece polyester fabrics for high-speed rail and train seats are impregnated with silica-alumina composite sol (bath ratio 1:10-20), and then baked, coated with PS flame retardant back glue (containing PS flame retardant 200-280g / L) and baked. The resulting fabric has good flame retardant properties without affecting the suede style.

[0007] Chinese patent document CN113279264B discloses an anti-ultraviolet and stain-resistant fabric and a production method thereof, comprising a base fabric and an anti-ultraviolet and stain-resistant layer coated on the surface of the base fabric. The base fabric is a blend of polyester fiber, viscose fiber, nylon fiber, cotton fiber and linen fiber, achieving good sun protection and stain-resistant effects, and the fabric is not easy to turn yellow and has good toughness.

[0008] The above fabrics all have the disadvantages of single function and narrow application scenarios. It is necessary to provide a fabric with composite functions and wider application scenarios. Summary of the invention

[0009] In order to solve the deficiencies in the prior art, the purpose of the present invention is to provide a functional fabric with excellent mechanical properties and flame retardant properties, good ultraviolet shielding effect, which can still maintain high antibacterial and ultraviolet protection properties after multiple washings, and has certain health care functions.

[0010] In order to achieve the above object, the present invention adopts the following technical solution:

[0011] A method for preparing a functional fabric comprises the following steps: blending polyester fiber and modified stone fiber, wherein the warp yarn is polyester fiber and the weft yarn is modified stone fiber, and then immersing the fabric in a finishing liquid for impregnation and rolling, and then sequentially performing pre-drying, baking, washing, and air-drying to obtain the functional fabric; the manufacturing process of the fabric is plain or twill, the warp density is 15 to 40 strands / cm, and the weft density is 20 to 35 strands / cm; the mass of the modified stone fiber is 40 to 60% of the total mass of the functional fabric.

[0012] Preferably, the method for preparing the modified stone fiber comprises the following steps:

[0013] (1) basalt, bauxite, quartz sand, apatite and albite are weighed in a weight ratio of 80-95:4-8:3-6:2-3:2-3, crushed through a 50-100 mesh sieve, then pickled, washed with water, dried and mixed evenly, put into a tank kiln and heated until the stone materials are melted to obtain a stock solution; the stock solution is soaked and stretched through a platinum-rhodium alloy wire drawing plate to obtain a raw yarn with a diameter of 5-10 μm; the raw yarn is twisted with a twisting machine to obtain a stone fiber with a twist of 200-600 twists / m;

[0014] (2) After the stone fiber is dried to constant weight, it is immersed in an impregnation solution, and then ammonia water is added. The fiber is kept in a constant temperature water bath at 300-500 r / min and 30-40°C for 2-4 hours. The stone fiber is taken out and dried at 40-60°C for 3-5 hours to obtain a modified stone fiber.

[0015] Preferably, in step (2), the impregnation solution is made of the following components in parts by weight: 30-50 parts of anhydrous ethanol, 3-5 parts of ethyl orthosilicate, 4-6 parts of 3-aminopropyltriethoxysilane, and 5-8 parts of magnesium nitrate hexahydrate.

[0016] Preferably, in step (2), the mass fraction of ammonia water is 25wt%, and the weight ratio of ammonia water to tetraethyl orthosilicate is 4-5:1.

[0017] Preferably, the preparation method of the finishing liquid is as follows: dispersing the modified nano ZnO / tourmaline into deionized water, then adding a silane coupling agent and waterborne polyurethane, stirring and dispersing them evenly, and obtaining the finishing liquid.

[0018] Preferably, the finishing liquid is made of the following components in parts by weight: 100-120 parts of deionized water, 20-30 parts of waterborne polyurethane, 15-20 parts of modified nano ZnO / tourmaline, and 5-10 parts of silane coupling agent.

[0019] Preferably, the silane coupling agent is one or more of γ-aminopropyltriethoxysilane, γ-aminopropylmethyldiethoxysilane, γ-ureapropyltriethoxysilane or N-(β-aminoethyl)-γ-aminopropylmethyldimethoxysilane.

[0020] Preferably, the preparation method of the modified nano ZnO / tourmaline is as follows:

[0021] (a) adding tourmaline powder to hydrochloric acid, ultrasonically dispersing for 1 hour, filtering, washing and drying to obtain preactivated tourmaline powder; adding the preactivated tourmaline powder to deionized water, then adding citric acid and zinc nitrate, mixing evenly, slowly dripping 0.1 mol / L NaOH solution, adjusting the pH to 8-10, evaporating at 70-90° C. to obtain wet gel; drying the wet gel at 100° C., and then calcining at 500-600° C. for 2-4 hours to obtain nano ZnO / tourmaline;

[0022] (b) Adding nano ZnO / tourmaline and maleic anhydride into deionized water, stirring and reacting at 70-90° C. for 4-6 hours, cooling to room temperature, filtering, washing and drying to obtain modified nano ZnO / tourmaline.

[0023] Preferably, in step (a), the weight ratio of preactivated tourmaline powder, citric acid and zinc nitrate is 6-8:1-2:1; in step (b), the weight ratio of nano ZnO / tourmaline, maleic anhydride and deionized water is 1:1:4-5.

[0024] The present invention also claims protection for a functional fabric prepared by the preparation method.

[0025] Compared with the prior art, the present invention has the following beneficial effects:

[0026] 1) The functional fabric provided by the present invention is blended with polyester fiber and modified stone fiber, and the obtained grey cloth is then finished. The obtained fabric has excellent mechanical properties and flame retardant properties. The finished fabric has a good shielding effect against ultraviolet rays, and can still maintain a high antibacterial and ultraviolet protection performance after multiple washings, and has certain health care functions.

[0027] 2) The functional fabric provided by the present invention, the raw materials of the stone fiber are basalt, bauxite, quartz sand, apatite, and albite, among which bauxite can significantly enhance the flame retardancy and wear resistance of the fiber; adding a small amount of apatite can improve the flame retardancy of the fabric, but adding too much will make the fiber brittle, so the preferred content of apatite is 2%; quartz sand can increase the flexibility of the fiber, improve its bending strength and elongation at break; albite can lower the melting temperature of the stone and reduce the energy consumption in the fiber preparation process.

[0028] 3) The functional fabric provided by the present invention utilizes an impregnation liquid to modify the prepared stone fiber. 3-aminopropyltriethoxysilane can improve the surface properties of the stone fiber. TES in situ generates nano-silicon dioxide on the surface of the stone fiber, which fills the cracks on the fiber surface, enhances the fiber strength, and reduces the burrs on the fiber surface. At the same time, magnesium nitrate hexahydrate is hydrolyzed to generate magnesium hydroxide which fills the gaps formed between the nano-silicon dioxide on the fiber surface, which can further improve the thermal stability and mechanical properties of the fiber.

[0029] 4) The functional fabric provided by the present invention loads nano ZnO on the surface of tourmaline, thereby improving the disadvantage of easy agglomeration of nano ZnO. The obtained nano ZnO / tourmaline has excellent UV protection, antibacterial and health care functions. It is modified by maleic anhydride to provide a large number of unsaturated bonds and carboxyl groups on the surface of the nano ZnO / tourmaline; the fabric is finished by a finishing liquid, and the silane coupling agent provides a large number of amino groups to the fabric, so that the modified nano ZnO / tourmaline can be better loaded on the fabric, effectively improving the sustained effect of the antibacterial and anti-aging properties of the fabric, so that the antibacterial and UV protection properties of the fabric remain excellent as the number of washings increases. DETAILED DESCRIPTION

[0030] In order to make the purpose, technical solution and advantages of the present invention clearer, the present invention is further described in detail below in conjunction with the embodiments. Of course, the specific embodiments described here are only used to explain the present invention and are not used to limit the present invention.

[0031] Unless otherwise specified, the chemical reagents and materials in the present invention are purchased from the market or synthesized from raw materials purchased from the market, such as basalt impregnating agent, silane coupling agent, waterborne polyurethane, etc.

[0032] In the preparation steps of the modified stone fiber, the pickling and impregnation are both existing technologies, the pickling is carried out by using 5-10wt% sulfuric acid at 65-75°C, and the impregnation is carried out by using a commercially available basalt impregnant;

[0033] The polyester fiber was purchased from Weifang Huafeng Textile Co., Ltd., which is flame-retardant polyester yarn, item number HF30;

[0034] Basalt was purchased from Hebei Jingshi Mineral Products Co., Ltd., with specifications of 5 to 25 mm;

[0035] Bauxite was purchased from Pengxian Mineral Products Processing Plant in Lingshou County, with an effective ingredient content of 92-98%;

[0036] The quartz sand is high-purity quartz sand purchased from Lingshou County Huiye Mineral Products Processing Plant, with a SiO2 content of 96-99%;

[0037] Apatite was purchased from Shaanxi Tianzhicheng Biotechnology Co., Ltd., with an effective content of 99%;

[0038] Tourmaline powder was purchased from Qiangdong Mineral Products Processing Plant in Lingshou County with a mesh size of 3000.

[0039] Example 1

[0040] A method for preparing a functional fabric comprises the following steps:

[0041] (1) basalt, bauxite, quartz sand, apatite and albite are weighed in a weight ratio of 85:6:4:2:3, crushed and passed through a 100-mesh sieve, then pickled, washed with water, dried and mixed evenly, and put into a tank kiln to heat until the stone materials are melted to obtain a stock solution; the stock solution is soaked and stretched through a platinum-rhodium alloy drawing plate to obtain a raw yarn with a diameter of 10 μm; the raw yarn is twisted with a twisting machine to obtain a stone fiber with a twist of 400 twists / m;

[0042] (2) adding 5 g of tetraethyl orthosilicate, 6 g of 3-aminopropyltriethoxysilane and 8 g of magnesium nitrate hexahydrate to 50 g of anhydrous ethanol to obtain an impregnation solution, drying the stone fiber to constant weight and then immersing it in the impregnation solution, then adding 25 g of 25 wt% ammonia water, and keeping the mixture in a constant temperature water bath at 500 r / min and 40° C. for 4 h, taking out the stone fiber and drying it at 60° C. for 5 h to obtain a modified stone fiber;

[0043] (3) adding tourmaline powder to 1 mol / L hydrochloric acid, ultrasonically dispersing for 1 h, filtering, washing, and drying to obtain preactivated tourmaline powder; adding 20 g of preactivated tourmaline powder to deionized water, then adding 5 g of citric acid and 2.5 g of zinc nitrate, mixing evenly, slowly dripping 0.1 mol / L NaOH solution, adjusting the pH to 10, and evaporating at 90° C. to obtain a wet gel; drying the wet gel at 100° C., and then calcining at 600° C. for 4 h to obtain nano ZnO / tourmaline;

[0044] (4) adding 20 g of nano ZnO / tourmaline and 20 g of maleic anhydride to 100 g of deionized water, stirring and reacting at 90° C. for 6 h, cooling to room temperature, filtering, washing, and drying to obtain modified nano ZnO / tourmaline;

[0045] (5) Dispersing 20 g of modified nano ZnO / tourmaline into 120 g of deionized water, then adding 10 g of γ-aminopropyltriethoxysilane and 30 g of waterborne polyurethane, stirring and dispersing uniformly to obtain a finishing solution;

[0046] (6) The polyester fiber and the modified stone fiber are blended, the warp yarn is the polyester fiber, and the weft yarn is the modified stone fiber, and then the fabric is immersed in the finishing liquid for impregnation, followed by pre-drying, baking, washing, and drying in sequence to obtain the functional fabric; the manufacturing process of the fabric is twill, the warp density is 25 strands / cm, and the weft density is 20 strands / cm, and the mass of the modified stone fiber is 60% of the total mass of the functional fabric.

[0047] Example 2

[0048] A method for preparing a functional fabric comprises the following steps:

[0049] (1) basalt, bauxite, quartz sand, apatite and albite are weighed in a weight ratio of 85:6:4:2:3, crushed and passed through a 50-mesh sieve, then pickled, washed with water, dried and mixed evenly, and put into a tank kiln to heat until the stone materials are melted to obtain a stock solution; the stock solution is soaked and stretched through a platinum-rhodium alloy drawing plate to obtain a raw yarn with a diameter of 10 μm; the raw yarn is twisted with a twisting machine to obtain a stone fiber with a twist of 400 twists / m;

[0050] (2) 3 g of tetraethyl orthosilicate, 4 g of 3-aminopropyltriethoxysilane, and 5 g of magnesium nitrate hexahydrate are added to 30 g of anhydrous ethanol to obtain an impregnation solution, the stone fiber is dried to constant weight and then immersed in the impregnation solution, and then 12 g of 25 wt% ammonia water is added, and the mixture is kept in a constant temperature water bath at 300 r / min and 30° C. for 2 h, and the stone fiber is taken out and dried at 40° C. for 3 h to obtain a modified stone fiber;

[0051] (3) adding tourmaline powder to 1 mol / L hydrochloric acid, ultrasonically dispersing for 1 h, filtering, washing, and drying to obtain preactivated tourmaline powder; adding 15 g of preactivated tourmaline powder to deionized water, then adding 2.5 g of citric acid and 2.5 g of zinc nitrate, mixing evenly, slowly dripping 0.1 mol / L NaOH solution, adjusting the pH to 8, and evaporating at 70° C. to obtain a wet gel; drying the wet gel at 100° C., and then calcining at 500° C. for 2 h to obtain nano ZnO / tourmaline;

[0052] (4) adding 15 g of nano ZnO / tourmaline and 15 g of maleic anhydride to 60 g of deionized water, stirring and reacting at 70° C. for 4 h, cooling to room temperature, filtering, washing, and drying to obtain modified nano ZnO / tourmaline;

[0053] (5) Dispersing 15 g of modified nano ZnO / tourmaline into 100 g of deionized water, then adding 5 g of γ-aminopropyltriethoxysilane and 20 g of waterborne polyurethane, stirring and dispersing uniformly to obtain a finishing solution;

[0054] (6) The polyester fiber and the modified stone fiber are blended, the warp yarn is the polyester fiber, and the weft yarn is the modified stone fiber, and then the fabric is immersed in the finishing liquid for impregnation, followed by pre-drying, baking, washing, and drying in sequence to obtain the functional fabric; the manufacturing process of the fabric is twill, the warp density is 25 strands / cm, and the weft density is 20 strands / cm, and the mass of the modified stone fiber is 40% of the total mass of the functional fabric.

[0055] Example 3

[0056] A method for preparing a functional fabric comprises the following steps:

[0057] (1) basalt, bauxite, quartz sand, apatite and albite are weighed in a weight ratio of 85:6:4:2:3, crushed and passed through an 80-mesh sieve, then pickled, washed with water, dried and mixed evenly, and put into a tank kiln to heat until the stone materials are melted to obtain a stock solution; the stock solution is soaked and stretched through a platinum-rhodium alloy drawing plate to obtain a raw yarn with a diameter of 10 μm; the raw yarn is twisted with a twisting machine to obtain a stone fiber with a twist of 400 twists / m;

[0058] (2) adding 4 g of tetraethyl orthosilicate, 5 g of 3-aminopropyltriethoxysilane and 6 g of magnesium nitrate hexahydrate to 40 g of anhydrous ethanol to obtain an impregnation solution, drying the stone fiber to constant weight and then immersing it in the impregnation solution, then adding 20 g of 25 wt% ammonia water, and keeping the mixture in a constant temperature water bath at 400 r / min and 35° C. for 3 h, taking out the stone fiber and drying it at 50° C. for 4 h to obtain a modified stone fiber;

[0059] (3) adding tourmaline powder to 1 mol / L hydrochloric acid, ultrasonically dispersing for 1 h, filtering, washing, and drying to obtain preactivated tourmaline powder; adding 18 g of preactivated tourmaline powder to deionized water, then adding 3 g of citric acid and 3 g of zinc nitrate, mixing evenly, slowly dripping 0.1 mol / L NaOH solution, adjusting the pH to 9, and evaporating at 80° C. to obtain a wet gel; drying the wet gel at 100° C., and then calcining at 550° C. for 3 h to obtain nano ZnO / tourmaline;

[0060] (4) adding 18 g of nano ZnO / tourmaline and 18 g of maleic anhydride to 80 g of deionized water, stirring and reacting at 80° C. for 5 h, cooling to room temperature, filtering, washing, and drying to obtain modified nano ZnO / tourmaline;

[0061] (5) Dispersing 18 g of modified nano ZnO / tourmaline into 110 g of deionized water, then adding 8 g of γ-aminopropyltriethoxysilane and 25 g of waterborne polyurethane, stirring and dispersing uniformly to obtain a finishing solution;

[0062] (6) The polyester fiber and the modified stone fiber are blended, the warp yarn is the polyester fiber, and the weft yarn is the modified stone fiber, and then the fabric is immersed in the finishing liquid for impregnation, followed by pre-drying, baking, washing, and drying in sequence to obtain the functional fabric; the manufacturing process of the fabric is twill, the warp density is 25 strands / cm, and the weft density is 20 strands / cm, and the mass of the modified stone fiber is 50% of the total mass of the functional fabric.

[0063] Comparative Example 1

[0064] A method for preparing a fabric comprises the following steps:

[0065] (1) basalt, bauxite, quartz sand, apatite and albite are weighed in a weight ratio of 85:6:4:2:3, crushed and passed through a 100-mesh sieve, then pickled, washed with water, dried and mixed evenly, and put into a tank kiln to heat until the stone materials are melted to obtain a stock solution; the stock solution is soaked and stretched through a platinum-rhodium alloy drawing plate to obtain a raw yarn with a diameter of 10 μm; the raw yarn is twisted with a twisting machine to obtain a stone fiber with a twist of 400 twists / m;

[0066] (2) adding tourmaline powder to 1 mol / L hydrochloric acid, ultrasonically dispersing for 1 h, filtering, washing, and drying to obtain preactivated tourmaline powder; adding 20 g of preactivated tourmaline powder to deionized water, then adding 5 g of citric acid and 2.5 g of zinc nitrate, mixing evenly, slowly dripping 0.1 mol / L NaOH solution, adjusting the pH to 10, and evaporating at 90° C. to obtain a wet gel; drying the wet gel at 100° C., and then calcining at 600° C. for 4 h to obtain nano ZnO / tourmaline;

[0067] (3) adding 20 g of nano ZnO / tourmaline and 20 g of maleic anhydride to 100 g of deionized water, stirring and reacting at 90° C. for 6 h, cooling to room temperature, filtering, washing, and drying to obtain modified nano ZnO / tourmaline;

[0068] (4) Dispersing 20 g of modified nano ZnO / tourmaline into 120 g of deionized water, then adding 10 g of γ-aminopropyltriethoxysilane and 30 g of waterborne polyurethane, stirring and dispersing uniformly to obtain a finishing solution;

[0069] (5) The polyester fiber and the stone fiber are blended, the warp yarn is the polyester fiber, and the weft yarn is the stone fiber, and then the fabric is immersed in the finishing liquid for impregnation, and then pre-dried, baked, washed, and dried in sequence to obtain the fabric; the manufacturing process of the fabric is twill, the warp density is 25 strands / cm, and the weft density is 20 strands / cm, and the mass of the stone fiber is 60% of the total mass of the fabric.

[0070] Comparative Example 2

[0071] A method for preparing a fabric comprises the following steps:

[0072] (1) basalt, bauxite, quartz sand, apatite and albite are weighed in a weight ratio of 85:6:4:2:3, crushed and passed through a 100-mesh sieve, then pickled, washed with water, dried and mixed evenly, and put into a tank kiln to heat until the stone materials are melted to obtain a stock solution; the stock solution is soaked and stretched through a platinum-rhodium alloy drawing plate to obtain a raw yarn with a diameter of 10 μm; the raw yarn is twisted with a twisting machine to obtain a stone fiber with a twist of 400 twists / m;

[0073] (2) adding 5 g of tetraethyl orthosilicate, 6 g of 3-aminopropyltriethoxysilane and 8 g of magnesium nitrate hexahydrate to 50 g of anhydrous ethanol to obtain an impregnation solution, drying the stone fiber to constant weight and then immersing it in the impregnation solution, then adding 25 g of 25 wt% ammonia water, and keeping the mixture in a constant temperature water bath at 500 r / min and 40° C. for 4 h, taking out the stone fiber and drying it at 60° C. for 5 h to obtain a modified stone fiber;

[0074] (3) adding tourmaline powder to 1 mol / L hydrochloric acid, ultrasonically dispersing for 1 h, filtering, washing, and drying to obtain preactivated tourmaline powder; adding 20 g of preactivated tourmaline powder to deionized water, then adding 5 g of citric acid and 2.5 g of zinc nitrate, mixing evenly, slowly dripping 0.1 mol / L NaOH solution, adjusting the pH to 10, and evaporating at 90° C. to obtain a wet gel; drying the wet gel at 100° C., and then calcining at 600° C. for 4 h to obtain nano ZnO / tourmaline;

[0075] (4) Dispersing 20 g of nano ZnO / tourmaline into 120 g of deionized water, then adding 10 g of γ-aminopropyltriethoxysilane and 30 g of waterborne polyurethane, stirring and dispersing uniformly to obtain a finishing solution;

[0076] (5) The polyester fiber and the modified stone fiber are blended, the warp yarn is the polyester fiber, and the weft yarn is the modified stone fiber, and then the fabric is immersed in a finishing liquid for impregnation, followed by pre-drying, baking, washing, and drying in sequence to obtain the fabric; the manufacturing process of the fabric is twill, the warp density is 25 strands / cm, and the weft density is 20 strands / cm, and the mass of the modified stone fiber is 60% of the total mass of the fabric.

[0077] The fabrics prepared in Examples 1 to 3 and Comparative Examples 1 to 2 were tested for parameters. The test methods were based on GB / T5455-2014 "Determination of vertical damage length, smoldering and afterflaming time for burning performance of textiles", GB / T 13767-1992 "Determination of heat resistance of textiles", GB / T 3923.1-2013 "Tensile properties of textile fabrics - Part 1: Determination of breaking strength and elongation at break (strip method)", GB / T 3917.3-2009 "Tear properties of textile fabrics - Part 3: Determination of tear strength of trapezoidal specimens", and the specific data are shown in Table 1.

[0078] Table 1 Flame retardant properties of fabrics

[0079]

[0080] The antibacterial properties of the fabrics prepared in Examples 1 to 3 and Comparative Examples 1 to 2 were tested according to GB / T 20944.3-2008 “Evaluation of antibacterial properties of textiles Part 3: Oscillation method”. The specific data are shown in Table 2.

[0081] Table 2 Antibacterial rate of fabrics

[0082]

[0083] GB / T 18830-2009 “Evaluation of UV protection performance of textiles” was used to test the UV protection of the fabrics prepared in Examples 1 to 3 and Comparative Examples 1 to 2. The specific data are shown in Table 3.

[0084] Table 3 Fabric UV protection

[0085]

[0086]

[0087] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical scheme and inventive concept of the present invention within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A method for preparing a functional fabric, characterized in that: The polyester fiber and the modified stone fiber are blended, the warp yarn is the polyester fiber, and the weft yarn is the modified stone fiber, and then the fabric is immersed in the finishing liquid for padding, and then pre-dried, baked, washed, and dried in sequence to obtain the functional fabric; the manufacturing process of the fabric is plain or twill, the warp density is 15 to 40 strands / cm, and the weft density is 20 to 35 strands / cm, and the mass of the modified stone fiber is 40 to 60% of the total mass of the functional fabric; The preparation method of the modified stone fiber comprises the following steps: (1) basalt, bauxite, quartz sand, apatite and albite are weighed in a weight ratio of 80-95:4-8:3-6:2-3:2-3, crushed through a 50-100 mesh sieve, then pickled, washed with water, dried and mixed evenly, put into a tank kiln and heated until the stone materials are melted to obtain a stock solution; the stock solution is soaked and stretched through a platinum-rhodium alloy wire drawing plate to obtain a raw yarn with a diameter of 5-10 μm; the raw yarn is twisted with a twisting machine to obtain a stone fiber with a twist of 200-600 twists / m; (2) drying the stone fiber to constant weight and then immersing it in an impregnation solution, then adding ammonia water, and keeping it in a constant temperature water bath at 300-500 r / min and 30-40° C. for 2-4 hours, taking out the stone fiber and drying it at 40-60° C. for 3-5 hours to obtain modified stone fiber; The impregnation liquid is made of the following components by weight: 30-50 parts of anhydrous ethanol, 3-5 parts of ethyl orthosilicate, 4-6 parts of 3-aminopropyltriethoxysilane, and 5-8 parts of magnesium nitrate hexahydrate; The preparation method of the finishing liquid is as follows: dispersing the modified nano ZnO / tourmaline into deionized water, then adding a silane coupling agent and waterborne polyurethane, stirring and dispersing the mixture evenly, and obtaining the finishing liquid; The silane coupling agent is one or more of γ-aminopropyltriethoxysilane, γ-aminopropylmethyldiethoxysilane, γ-ureapropyltriethoxysilane or N-(β-aminoethyl)-γ-aminopropylmethyldimethoxysilane; The preparation method of the modified nano ZnO / tourmaline is as follows: (a) adding tourmaline powder to hydrochloric acid, ultrasonically dispersing for 1 hour, filtering, washing, and drying to obtain preactivated tourmaline powder; adding the preactivated tourmaline powder to deionized water, then adding citric acid and zinc nitrate, mixing evenly, slowly dripping 0.1 mol / L NaOH solution, adjusting the pH to 8-10, and evaporating at 70-90° C. to obtain a wet gel; The wet gel is dried at 100°C, and then calcined at 500-600°C for 2-4 hours to obtain nano ZnO / tourmaline; (b) Adding nano ZnO / tourmaline and maleic anhydride into deionized water, stirring and reacting at 70-90° C. for 4-6 hours, cooling to room temperature, filtering, washing and drying to obtain modified nano ZnO / tourmaline.

2. The preparation method according to claim 1, characterized in that: The mass fraction of ammonia water is 25wt%, and the weight ratio of ammonia water to tetraethyl orthosilicate is 4-5:

1.

3. The preparation method according to claim 1, characterized in that: The finishing liquid is prepared from the following components by weight: 100-120 parts of deionized water, 20-30 parts of waterborne polyurethane, 15-20 parts of modified nano ZnO / tourmaline, and 5-10 parts of silane coupling agent.

4. The functional fabric according to claim 1, characterized in that: In step (a), the weight ratio of preactivated tourmaline powder, citric acid and zinc nitrate is 6-8:1-2:1; in step (b), the weight ratio of nano ZnO / tourmaline, maleic anhydride and deionized water is 1:1:4-5.

5. A functional fabric prepared by the preparation method according to any one of claims 1 to 4.

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