Thermal insulation composite fabric and preparation method thereof

Abstract

The invention discloses a thermal insulation composite fabric and a preparation method thereof.The composite fabric comprises an upper functional base cloth and a lower functional base cloth, a thermal insulation layer is arranged between the functional base cloth, the main body of the functional base cloth is a polyester material, the polyester material is not prone to adsorbing moisture, heat loss caused by moisture is avoided, and meanwhile graphene oxide is contained in the functional base cloth, so that the thermal insulation performance of the composite fabric is improved. A heat conduction barrier is formed in the functional base cloth, transfer of heat through materials is reduced, the heat preservation layer contains the modified filler, the modified filler is of a porous structure, the structure can contain a large amount of still air, air convection is limited, and therefore transfer of heat through the materials is reduced, and the heat preservation effect is improved. By adding the modified filler, the flexibility of the thermal insulation layer is improved, the prepared fabric is not too hard, and when the thermal insulation layer is formed between the two pieces of functional base cloth, epoxy groups on the thermal insulation layer can react with residual amino groups on the functional base cloth, so that the adhesion between the thermal insulation layer and the functional base cloth is improved, and the layering of the composite fabric is prevented.

Description

Technical Field

[0001] The present invention relates to the technical field of fabric preparation, and particularly relates to a heat-insulating composite fabric and a preparation method thereof. Background Art

[0002] Polyester fiber, which is commonly known as "polyester", is a synthetic fiber made by chemical polycondensation of organic dibasic acids and diols. It has excellent wrinkle resistance and shape retention. The clothes made from it are not easy to wrinkle during wearing and can maintain the original shape of the clothes. Secondly, polyester fiber has high strength and elastic recovery ability, making the woven fabric strong and durable, and it can quickly return to its original state. In addition, polyester fiber also has characteristics such as abrasion resistance and non-sticking hair, making the fabric look cleaner. Its low heat conduction effect makes it often used in the preparation of warm clothes, but the heat preservation effect of polyester fabrics still needs to be enhanced. Summary of the Invention

[0003] The purpose of the present invention is to provide a heat-insulating composite fabric and a preparation method thereof, which solves the problem that the heat preservation effect of polyester fabrics is average at the present stage.

[0004] The purpose of the present invention can be achieved by the following technical solutions:

[0005] A preparation method of a heat-insulating composite fabric specifically includes the following steps:

[0006] Step A1: Mix terephthalic acid, ethylene glycol, triphenyl phosphate and antimony trioxide evenly. Under the conditions of a temperature of 230 - 250 °C and a vacuum degree of 300 - 350 kPa, react for 3 - 5 h, then add glycidol and continue to react for 2 - 3 h. Raise the temperature to 270 - 300 °C and under the condition of a vacuum degree of 60 - 80 Pa, react for 2 - 3 h to obtain modified polyester.

[0007] Step A2: Disperse graphene oxide in ethanol. Under the conditions of a rotation speed of 300 - 500 r / min and a temperature of 70 - 80 °C, stir and add 3-aminopropyltrimethoxysilane and deionized water, and react for 2 - 3 h to obtain modified graphene. Mix the modified polyester and the modified graphene and add them into an extruder. Under the condition of a temperature of 280 - 290 °C, melt extrude and spin to obtain polyester fiber.

[0008] Step A3: Dissolve SBS resin in cyclohexane, add formic acid and hydrogen peroxide, stir and add cetyltrimethylammonium chloride under the conditions of a rotation speed of 120 - 150 r / min and a temperature of 70 - 75 °C, and react for 4 - 6 h to obtain modified SBS resin. Dissolve the modified SBS in xylene, add modified filler and diisopropylbenzene peroxide, introduce nitrogen protection, and react for 2 - 4 h under the conditions of a rotation speed of 200 - 300 r / min and a temperature of 110 - 130 °C to obtain a treatment liquid;

[0009] Step A4: Subject polyester fiber and cotton fiber to processes of bale plucking, blending, opening, feeding, roving forming, carding, drawing and roving making to obtain a composite roving. Perform weft knitting double rib knitting on the composite roving to obtain a functional base fabric. Coat the surface of one functional base fabric with the treatment liquid, then attach another functional base fabric to the side coated with the treatment liquid, and perform heat preservation treatment for 4 - 6 h under the condition of a temperature of 140 - 150 °C to form a heat preservation layer between the two functional base fabrics and obtain a heat preservation composite fabric.

[0010] Further, the molar ratio of terephthalic acid, ethylene glycol and glycidol in Step A1 is 1.2:1:0.4, the dosage of antimony trioxide is 1‰ of the mass of terephthalic acid and the modified monomer, and the dosage of triphenyl phosphate is 1‰ of the mass of terephthalic acid and the modified monomer.

[0011] Further, the dosage of 3-aminopropyltrimethoxysilane in Step A2 is 3% of the mass of graphene oxide, and the mass ratio of modified polyester to modified graphene is 100:10 - 15.

[0012] Further, the dosage ratio of SBS, cyclohexane, formic acid and hydrogen peroxide in Step A3 is 10 g:100 mL:10 mL:12 mL, the dosage of cetyltrimethylammonium chloride is 1% of the mass of SBS, and the dosage ratio of modified SBS, xylene, modified filler and diisopropylbenzene peroxide is 10 - 15 g:100 mL:1 - 5 g:0.1 - 0.3 g.

[0013] Further, the modified filler is prepared by the following steps:

[0014] Step B1: Mix bamboo fiber and sodium hydroxide solution evenly, stir for 30 - 40 min under the conditions of a rotation speed of 60 - 80 r / min and a temperature of 40 - 50 °C, then add toluene and acryloyl chloride, raise the temperature to 105 - 110 °C, and react for 8 - 10 h to obtain functionalized fiber. Mix the functionalized cellulose, 3-mercaptopropyltrimethoxysilane, 2-hydroxy-2-methyl-1-phenyl-1-propanone and DMF, and react for 2 - 3 h under the conditions of a rotation speed of 200 - 300 r / min, a temperature of 20 - 25 °C and 365 ultraviolet light irradiation to obtain modified fiber;

[0015] Step B2: Disperse the modified fibers in dimethyl sulfoxide, add 3-aminopropyltrimethoxysilane, and react for 10 - 15 h under the conditions of a rotation speed of 150 - 200 r / min and a temperature of 60 - 70 °C. Then cool down to 20 - 25 °C, add ammonium fluoride, and react for 20 - 25 h to obtain a precursor. Mix the precursor, maleic anhydride, and DMF, and react for 1 - 1.5 h under the conditions of a rotation speed of 120 - 150 r / min and a temperature of 20 - 25 °C. Then add acetic anhydride and sodium acetate, heat up to 100 - 105 °C, and continue to react for 3 - 5 h to obtain the modified filler.

[0016] Furthermore, the dosage ratio of the bamboo fibers, sodium hydroxide solution, toluene, and acryloyl chloride described in Step B1 is 2 g:10 mL:6 mL:10 g. The mass fraction of the sodium hydroxide solution is 30%. The molar ratio of the double bonds on the functionalized cellulose to 3-mercaptopropyltrimethoxysilane is 1:1. The dosage of 2-hydroxy-2-methyl-1-phenyl-1-propanone is 2% of the mass of 3-mercaptopropyltrimethoxysilane.

[0017] Furthermore, the dosage ratio of the modified fibers, dimethyl sulfoxide, 3-aminopropyltrimethoxysilane, and ammonium fluoride described in Step B2 is 2 g:100 mL:3 mL:0.3 g. The dosages of the amino group on the precursor, maleic anhydride, acetic anhydride, and sodium acetate are 5 mmol:5 mmol:1 mL:1 mmol.

[0018] The beneficial effects of the present invention: A heat-insulating composite fabric disclosed by the present invention includes two upper and lower functional base fabrics. A heat-insulating layer is provided between the functional base fabrics. The modified base fabric is formed by esterification condensation of terephthalic acid and ethylene glycol and then end-capping with glycidol to form a modified polyester. The graphene oxide is surface-treated with 3-aminopropyltrimethoxysilane to graft amino groups on the surface to obtain modified graphene. The modified polyester is melted and extruded and blended with the modified graphene, and finally spun to obtain polyester fibers. The polyester fibers are subjected to processes such as bale plucking, cotton mixing, bale opening, cotton feeding, lap forming, carding, drawing, and roving to obtain a composite roving. The composite roving is subjected to weft knitting double rib knitting to obtain the functional base fabric.

[0019] The heat-insulating layer uses SBS resin as the raw material and cetyltrimethylammonium chloride as a phase transfer catalyst to epoxidize the double bonds in the SBS resin molecular chain into epoxy groups to obtain a modified SBS resin. The modified SBS resin is dissolved in xylene, and the modified filler and diisopropylbenzene peroxide are added and stirred at a high temperature. Under the action of diisopropylbenzene peroxide, the double bonds on the modified filler are grafted to the SBS resin molecular chain to obtain a treatment solution. The treatment solution is coated between the two functional base fabrics to form the heat-insulating layer.

[0020] The modified filler is prepared from bamboo fiber as raw material and treated with sodium hydroxide to convert the alcohol hydroxyl group into sodium alkoxide, and then reacts with the acyl chloride group on acryloyl chloride to obtain functionalized fiber. The functionalized fiber and 3-mercaptopropyltrimethoxysilane are reacted under ultraviolet light irradiation, so that the double bond on the functionalized fiber reacts with the mercapto group on 3-mercaptopropyltrimethoxysilane to obtain modified fiber. The modified fiber and 3-aminopropyltrimethoxysilane are hydrolyzed and condensed to coat polyhedral oligomeric silsesquioxane on the surface of the modified fiber to obtain a precursor. The precursor and maleic anhydride are reacted so that the amino group on the precursor reacts with maleic anhydride to form maleimide, and the modified filler is obtained.

[0021] The main body of the functional base fabric is made of polyester material. The polyester material is not easy to adsorb moisture, avoiding heat loss caused by dampness. At the same time, it contains graphene oxide, forming a heat conduction barrier inside the functional base fabric, reducing the heat transfer through the material. The thermal insulation layer contains modified filler, and the modified filler has a porous structure, which can accommodate a large amount of static air, thereby restricting air convection, reducing the heat transfer through the material, and the addition of the modified filler increases the flexibility of the thermal insulation layer, ensuring that the prepared fabric is not too hard. When forming a thermal insulation layer between two functional base fabrics, the epoxy group on the thermal insulation layer will react with the remaining amino group on the functional base fabric, thereby increasing the adhesion between the thermal insulation layer and the functional base fabric and preventing the composite fabric from delaminating. Specific embodiments

[0022] The technical solutions in the embodiments of the present invention will be clearly and completely described below. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0023] Example 1. A preparation method of a thermal insulation composite fabric specifically includes the following steps:

[0024] Step A1: Mix terephthalic acid, ethylene glycol, triphenyl phosphate and antimony trioxide evenly, and react for 3 h under the conditions of a temperature of 230 °C and a vacuum degree of 300 kPa. Then add glycidol and continue to react for 2 h. Raise the temperature to 270 °C and react for 2 h under the condition of a vacuum degree of 60 Pa to obtain modified polyester.

[0025] Step A2: Disperse graphene oxide in ethanol, stir and add 3-aminopropyltrimethoxysilane and deionized water at a rotation speed of 300 r / min and a temperature of 70 °C, and react for 2 h to obtain modified graphene. Mix the modified polyester and the modified graphene and add them into an extruder, and melt-extrude and spin at a temperature of 280 °C to obtain polyester fiber.

[0026] Step A3: Dissolve the SBS resin in cyclohexane, add formic acid and hydrogen peroxide, stir and add cetyltrimethylammonium chloride at a rotation speed of 120 r / min and a temperature of 70 °C, and react for 4 h to obtain the modified SBS resin. Dissolve the modified SBS in xylene, add the modified filler and diisopropylbenzene peroxide, introduce nitrogen protection, and react at a rotation speed of 200 r / min and a temperature of 110 °C for 2 h to obtain the treatment liquid;

[0027] Step A4: Subject the polyester fiber and cotton fiber to processes such as bale plucking, cotton mixing, opening, feeding, lap forming, carding, drawing, and roving to obtain the composite roving. Perform weft knitting double rib knitting on the composite roving to obtain the functional base fabric. Coat the surface of one piece of the functional base fabric with the treatment liquid, then attach another piece of the functional base fabric to the side coated with the treatment liquid, and keep it warm at a temperature of 140 °C for 4 h to form a heat-insulating layer between the two pieces of functional base fabric, thereby obtaining the heat-insulating composite fabric.

[0028] The molar ratio of terephthalic acid, ethylene glycol, and glycidol in Step A1 is 1.2:1:0.4, the dosage of antimony trioxide is 1‰ of the mass of terephthalic acid and the modified monomer, and the dosage of triphenyl phosphate is 1‰ of the mass of terephthalic acid and the modified monomer.

[0029] The dosage of 3-aminopropyltrimethoxysilane in Step A2 is 3% of the mass of graphene oxide, and the mass ratio of the modified polyester to the modified graphene is 100:10.

[0030] The dosage ratio of SBS, cyclohexane, formic acid, and hydrogen peroxide in Step A3 is 10 g:100 mL:10 mL:12 mL, the dosage of cetyltrimethylammonium chloride is 1% of the mass of SBS, the dosage ratio of the modified SBS, xylene, the modified filler, and diisopropylbenzene peroxide is 10 g:100 mL:1 g:0.1 g, and the model of SBS is 1301.

[0031] The said modified filler is prepared by the following steps:

[0032] Step B1: Mix the bamboo fiber and sodium hydroxide solution evenly, stir for 30 min at a rotation speed of 60 r / min and a temperature of 40 °C, then add toluene and acryloyl chloride, raise the temperature to 105 °C, and react for 8 h to obtain the functionalized fiber. Mix the functionalized cellulose, 3-mercaptopropyltrimethoxysilane, 2-hydroxy-2-methyl-1-phenyl-1-propanone, and DMF, and react at a rotation speed of 200 r / min, a temperature of 20 °C, and under the irradiation of 365 ultraviolet light for 2 h to obtain the modified fiber;

[0033] Step B2: Disperse the modified fibers in dimethyl sulfoxide, add 3-aminopropyltrimethoxysilane, and react for 10 h at a rotation speed of 150 r / min and a temperature of 60 °C. Then cool down to 20 °C, add ammonium fluoride, and react for 20 h to obtain a precursor. Mix the precursor, maleic anhydride, and DMF, and react for 1 h at a rotation speed of 120 r / min and a temperature of 20 °C. Then add acetic anhydride and sodium acetate, heat up to 100 °C, and continue to react for 3 h to obtain the modified filler.

[0034] The dosage ratio of the bamboo fibers, sodium hydroxide solution, toluene, and acryloyl chloride described in Step B1 is 2 g:10 mL:6 mL:10 g. The mass fraction of the sodium hydroxide solution is 30%. The molar ratio of the double bonds on the functionalized cellulose to 3-mercaptopropyltrimethoxysilane is 1:1. The dosage of 2-hydroxy-2-methyl-1-phenyl-1-propanone is 2% of the mass of 3-mercaptopropyltrimethoxysilane.

[0035] The dosage ratio of the modified fibers, dimethyl sulfoxide, 3-aminopropyltrimethoxysilane, and ammonium fluoride described in Step B2 is 2 g:100 mL:3 mL:0.3 g. The dosages of the amino groups on the precursor, maleic anhydride, acetic anhydride, and sodium acetate are 5 mmol:5 mmol:1 mL:1 mmol.

[0036] Example 2. A method for preparing a thermal insulation composite fabric specifically includes the following steps:

[0037] Step A1: Mix terephthalic acid, ethylene glycol, triphenyl phosphate, and antimony trioxide evenly, and react for 3 - 5 h at a temperature of 240 °C and a vacuum degree of 330 kPa. Then add glycidol and continue to react for 2.5 h. Heat up to 285 °C and react for 2 h at a vacuum degree of 70 Pa to obtain the modified polyester.

[0038] Step A2: Disperse graphene oxide in ethanol, stir and add 3-aminopropyltrimethoxysilane and deionized water at a rotation speed of 500 r / min and a temperature of 75 °C, and react for 2 h to obtain the modified graphene. Mix the modified polyester and the modified graphene and add them into an extruder, and melt-extrude and spin at a temperature of 285 °C to obtain polyester fibers.

[0039] Step A3: Dissolve the SBS resin in cyclohexane, add formic acid and hydrogen peroxide, stir and add cetyltrimethylammonium chloride at a rotation speed of 120 r / min and a temperature of 75 °C, and react for 5 h to obtain the modified SBS resin. Dissolve the modified SBS in xylene, add the modified filler and diisopropylbenzene peroxide, introduce nitrogen protection, and react for 3 h at a rotation speed of 200 r / min and a temperature of 120 °C to obtain the treatment liquid.

[0040] Step A4: Subject the polyester fiber and cotton fiber to processes of bale plucking, cotton mixing, opening, feeding, lap forming, carding, drawing, and roving to obtain a composite roving. Perform weft knitting double rib knitting on the composite roving to obtain a functional base fabric. Coat the surface of one piece of the functional base fabric with a treatment liquid, then attach another piece of the functional base fabric to one side of the coated treatment liquid, and under the condition of a temperature of 145 °C, perform heat preservation treatment for 5 h to form a heat preservation layer between the two pieces of functional base fabric, thereby obtaining a heat preservation composite fabric.

[0041] The molar ratio of terephthalic acid, ethylene glycol, and glycidol in Step A1 is 1.2:1:0.4, the dosage of antimony trioxide is 1‰ of the mass of terephthalic acid and the modified monomer, and the dosage of triphenyl phosphate is 1‰ of the mass of terephthalic acid and the modified monomer.

[0042] The dosage of 3-aminopropyltrimethoxysilane in Step A2 is 3% of the mass of graphene oxide, and the mass ratio of the modified polyester to the modified graphene is 100:13.

[0043] The dosage ratio of SBS, cyclohexane, formic acid, and hydrogen peroxide in Step A3 is 10 g:100 mL:10 mL:12 mL, the dosage of cetyltrimethylammonium chloride is 1% of the mass of SBS, the dosage ratio of the modified SBS, xylene, modified filler, and diisopropylbenzene peroxide is 13 g:100 mL:3 g:0.2 g, and the model of SBS is 1301.

[0044] The described modified filler is prepared by the following steps:

[0045] Step B1: Mix bamboo fiber and sodium hydroxide solution evenly, under the conditions of a rotation speed of 60 r / min and a temperature of 45 °C, stir for 35 min, then add toluene and acryloyl chloride, raise the temperature to 110 °C, and react for 8 - 10 h to obtain a functionalized fiber. Mix the functionalized cellulose, 3-mercaptopropyltrimethoxysilane, 2-hydroxy-2-methyl-1-phenyl-1-propanone, and DMF, and under the conditions of a rotation speed of 200 r / min, a temperature of 25 °C, and 365 ultraviolet light irradiation, react for 2 h to obtain a modified fiber;

[0046] Step B2: Disperse the modified fiber in dimethyl sulfoxide, add 3-aminopropyltrimethoxysilane, and under the conditions of a rotation speed of 150 r / min and a temperature of 65 °C, react for 13 h, then cool down to 23 °C, add ammonium fluoride, and react for 23 h to obtain a precursor. Mix the precursor, maleic anhydride, and DMF, and under the conditions of a rotation speed of 120 r / min and a temperature of 25 °C, react for 1.3 h, then add acetic anhydride and sodium acetate, raise the temperature to 105 °C, and continue to react for 4 h to obtain the modified filler.

[0047] The dosage ratio of bamboo fiber, sodium hydroxide solution, toluene and acryloyl chloride described in step B1 is 2 g: 10 mL: 6 mL: 10 g, the mass fraction of the sodium hydroxide solution is 30%, the molar ratio of the double bond on the functionalized cellulose to 3-mercaptopropyltrimethoxysilane is 1:1, and the dosage of 2-hydroxy-2-methyl-1-phenyl-1-propanone is 2% of the mass of 3-mercaptopropyltrimethoxysilane.

[0048] The dosage ratio of the modified fiber, dimethyl sulfoxide, 3-aminopropyltrimethoxysilane and ammonium fluoride described in step B2 is 2 g: 100 mL: 3 mL: 0.3 g, and the dosages of amino group, maleic anhydride, acetic anhydride and sodium acetate on the precursor are 5 mmol: 5 mmol: 1 mL: 1 mmol.

[0049] Example 3. A preparation method of a heat-insulating composite fabric specifically includes the following steps:

[0050] Step A1: Mix terephthalic acid, ethylene glycol, triphenyl phosphate and antimony trioxide evenly, and under the conditions of a temperature of 250 °C and a vacuum degree of 350 kPa, react for 5 h, then add glycidol and continue to react for 3 h. Raise the temperature to 300 °C and under the condition of a vacuum degree of 80 Pa, react for 3 h to obtain modified polyester.

[0051] Step A2: Disperse graphene oxide in ethanol, and under the conditions of a rotation speed of 500 r / min and a temperature of 80 °C, stir and add 3-aminopropyltrimethoxysilane and deionized water, and react for 3 h to obtain modified graphene. Mix the modified polyester and the modified graphene and add them into an extruder, and under the condition of a temperature of 290 °C, melt extrude and spin to obtain polyester fibers.

[0052] Step A3: Dissolve SBS resin in cyclohexane, add formic acid and hydrogen peroxide, and under the conditions of a rotation speed of 150 r / min and a temperature of 75 °C, stir and add cetyltrimethylammonium chloride, and react for 6 h to obtain modified SBS resin. Dissolve the modified SBS in xylene, add modified filler and dicumyl peroxide, introduce nitrogen protection, and under the conditions of a rotation speed of 300 r / min and a temperature of 130 °C, react for 4 h to obtain a treatment liquid.

[0053] Step A4: Subject polyester fibers and cotton fibers to processes such as bale plucking, mixing, opening, feeding, roving forming, carding, drawing and roving making to obtain composite rovings. Perform weft knitting double rib knitting on the composite rovings to obtain a functional base fabric. Coat the surface of one functional base fabric with the treatment liquid, then attach another functional base fabric to the side coated with the treatment liquid, and under the condition of a temperature of 150 °C, perform heat preservation treatment for 6 h to form a heat-insulating layer between the two functional base fabrics, thereby obtaining the heat-insulating composite fabric.

[0054] The molar ratio of terephthalic acid, ethylene glycol and glycidol described in Step A1 is 1.2:1:0.4, the dosage of antimony trioxide is 1‰ of the mass of terephthalic acid and the modified monomer, and the dosage of triphenyl phosphate is 1‰ of the mass of terephthalic acid and the modified monomer.

[0055] The dosage of 3-aminopropyltrimethoxysilane described in Step A2 is 3% of the mass of graphene oxide, and the mass ratio of the modified polyester to the modified graphene is 100:15.

[0056] The dosage ratio of SBS, cyclohexane, formic acid and hydrogen peroxide described in Step A3 is 10g:100mL:10mL:12mL, the dosage of cetyltrimethylammonium chloride is 1% of the mass of SBS, the dosage ratio of the modified SBS, xylene, the modified filler and diisopropylbenzene peroxide is 15g:100mL:5g:0.3g, and the model of SBS is 1301.

[0057] The described modified filler is prepared by the following steps:

[0058] Step B1: Mix bamboo fiber and sodium hydroxide solution evenly. Under the conditions of a rotation speed of 80 r / min and a temperature of 50 °C, after stirring for 40 min, add toluene and acryloyl chloride, raise the temperature to 110 °C, and react for 10 h to obtain functionalized fiber. Mix the functionalized cellulose, 3-mercaptopropyltrimethoxysilane, 2-hydroxy-2-methyl-1-phenyl-1-propanone and DMF, and under the conditions of a rotation speed of 300 r / min, a temperature of 25 °C and 365 ultraviolet light irradiation, react for 3 h to obtain modified fiber;

[0059] Step B2: Disperse the modified fiber in dimethyl sulfoxide, add 3-aminopropyltrimethoxysilane, and under the conditions of a rotation speed of 200 r / min and a temperature of 70 °C, after reacting for 15 h, cool down to 25 °C, add ammonium fluoride, and react for 25 h to obtain a precursor. Mix the precursor, maleic anhydride and DMF, and under the conditions of a rotation speed of 150 r / min and a temperature of 25 °C, after reacting for 1.5 h, add acetic anhydride and sodium acetate, raise the temperature to 105 °C, and continue to react for 5 h to obtain the modified filler.

[0060] The dosage ratio of the bamboo fiber, sodium hydroxide solution, toluene and acryloyl chloride described in Step B1 is 2g:10mL:6mL:10g, the mass fraction of the sodium hydroxide solution is 30%, the molar ratio of the double bond on the functionalized cellulose to 3-mercaptopropyltrimethoxysilane is 1:1, and the dosage of 2-hydroxy-2-methyl-1-phenyl-1-propanone is 2% of the mass of 3-mercaptopropyltrimethoxysilane.

[0061] The dosage ratio of the modified fiber, dimethyl sulfoxide, 3-aminopropyltrimethoxysilane, and ammonium fluoride described in step B2 is 2 g: 100 mL: 3 mL: 0.3 g, and the dosages of amino groups, maleic anhydride, acetic anhydride, and sodium acetate on the precursor are 5 mmol: 5 mmol: 1 mL: 1 mmol.

[0062] Comparative Example 1: Compared with Example 1, graphene oxide was not added in this comparative example, and the remaining steps were the same.

[0063] Comparative Example 2: Compared with Example 1, the modified fiber was not added in this comparative example, and the remaining steps were the same.

[0064] Comparative Example 3: Compared with Example 1, bamboo fiber was used to replace the modified filler in this comparative example, and the remaining steps were the same.

[0065] The heat preservation rates of the heat preservation fabrics prepared in Examples 1-3 and Comparative Examples 1-3 were detected according to the standard of GB / T11048-2008. The heat preservation fabrics were washed 50 times, with each washing lasting 10 min, and it was observed whether the fabrics showed delamination. The test results are shown in Table 1 below.

[0066] Table 1

[0067]

[0068] It can be seen from the above table that this application has a good heat preservation effect.

[0069] The above content is only an example and illustration of the concept of the present invention. Those skilled in the art of this technology can make various modifications or supplements to the specific embodiments described, or use similar methods to replace them. As long as they do not deviate from the concept of the invention or exceed the scope defined by this claim book, they should all fall within the protection scope of the present invention.

Claims

1. A thermal insulation composite fabric, characterized in that: The composite fabric comprises two upper and lower functional base fabrics, and a heat-insulating layer is arranged between the functional base fabrics.

2. The method for preparing a thermal insulation composite fabric according to claim 1, characterized in that: The specific steps include: Step A1: After terephthalic acid, ethylene glycol, triphenyl phosphate and antimony trioxide are mixed and reacted, glycidol is added and the reaction is continued to obtain a modified polyester; Step A2: dispersing graphene oxide in ethanol, stirring and adding 3-aminopropyltrimethoxysilane and deionized water to react to obtain modified graphene, mixing the modified polyester and the modified graphene and adding them to an extruder, melt-extruding and spinning to obtain polyester fibers; Step A3: dissolving SBS resin in cyclohexane, adding formic acid and hydrogen peroxide, stirring and adding hexadecyltrimethylammonium chloride to react, thereby obtaining a modified SBS resin; dissolving the modified SBS in xylene, adding a modified filler and diisopropylbenzene peroxide, introducing nitrogen protection, reacting, thereby obtaining a treatment liquid; Step A4: Processing polyester fiber and cotton fiber through cotton grabbing, cotton blending, cotton opening, cotton feeding, cotton rolling, cotton carding, drawing and roving to obtain composite roving, weft knitting the composite roving to obtain functional base cloth, coating the surface of one functional base cloth with a treatment liquid, and then laminating another functional base cloth on the side coated with the treatment liquid, and heat-insulating at high temperature to form a heat-insulating layer between the two functional base cloths to obtain a heat-insulating composite fabric.

3. The method for preparing a thermal insulation composite fabric according to claim 2, characterized in that: The molar ratio of terephthalic acid, ethylene glycol and propylene oxide in step A1 is 1.2:1:0.

4.

4. The method for preparing a thermal insulation composite fabric according to claim 2, characterized in that: The amount of 3-aminopropyltrimethoxysilane used in step A2 is 3% of the mass of graphene oxide, and the mass ratio of modified polyester to modified graphene is 100:10-15.

5. The method for preparing a thermal insulation composite fabric according to claim 2, characterized in that: The amount ratio of SBS, cyclohexane, formic acid and hydrogen peroxide described in step A3 is 10g:100mL:10mL:12mL, and the amount ratio of modified SBS, xylene, modified filler and diisopropylbenzene peroxide is 10-15g:100mL:1-5g:0.1-0.3g.

6. The method for preparing a thermal insulation composite fabric according to claim 2, characterized in that: The modified filler is prepared by the following steps: Step B1: After mixing bamboo fiber and sodium hydroxide solution for 3 hours, toluene and acryloyl chloride are added, and the temperature is raised to react to obtain functionalized fiber; functionalized cellulose, 3-mercaptopropyltrimethoxysilane, 2-hydroxy-2-methyl-1-phenyl-1-propanone and DMF are mixed to react to obtain modified fiber; Step B2: Disperse the modified fiber in dimethyl sulfoxide, add 3-aminopropyltrimethoxysilane, react, cool and add ammonium fluoride to react to obtain a precursor, mix the precursor, maleic anhydride and DMF to react, add acetic anhydride and sodium acetate, heat and continue to react to obtain a modified filler.

7. The method for preparing a thermal insulation composite fabric according to claim 6, characterized in that: The amount ratio of the bamboo fiber, sodium hydroxide solution, toluene and acryloyl chloride described in step B1 is 2g:10mL:6mL:10g, and the molar ratio of the double bonds on the functionalized cellulose and 3-mercaptopropyltrimethoxysilane is 1:

1.

8. The method for preparing a thermal insulation composite fabric according to claim 6, characterized in that: The amount ratio of the modified fiber, dimethyl sulfoxide, 3-aminopropyltrimethoxysilane and ammonium fluoride described in step B2 is 2g:100mL:3mL:0.3g, and the amount of amino group, maleic anhydride, acetic anhydride and sodium acetate on the precursor is 5mmo l:5mmo l:1mL:1mmo l.

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