A toughened film composite fabric and a method of making the same

Abstract

The application discloses a kind of toughened film composite fabric and preparation method thereof, it is related to the technical field of fabric.The fabric involved in the application adopts a unique three-layer structure design, including a layer of elastic film, a layer of gel layer and a layer of base cloth.This composite structure makes the fabric have a variety of excellent functional properties.First, the existence of elastic film, gel layer gives the fabric good elastic properties, so that it can adapt to various different wearing needs, provide comfortable wearing experience.Second, the elastic film ensures the waterproof, ultraviolet resistance of the fabric, and the gel layer builds a moisture-permeable composite layer.The fabric of the application realizes the multiple effects of waterproof, moisture-permeable and elastic through the ingenious combination of three-layer structure, providing new possibilities for the application of modern textiles.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of fabrics, in particular to a toughened film composite fabric and a preparation method thereof. BACKGROUND

[0002] In today's market, thermoplastic elastomer toughened film composite fabric is attracting attention due to its unique performance. This fabric not only can significantly improve the mechanical properties of the fabric while maintaining good waterproof performance, thereby greatly expanding its application range. However, the thermoplastic elastomer toughened film composite fabric on the market at present mostly adopts laminated composite technology to composite the fabric with the thermoplastic elastomer film. In this composite process, an adhesive is usually added to ensure the close combination of the fabric and the film. However, the use of this adhesive also brings a problem, that is, the moisture permeability of the thermoplastic elastomer toughened film composite fabric is relatively poor. This limits its use in some application occasions that require high moisture permeability to some extent. Therefore, how to improve the moisture permeability of the fabric while maintaining its mechanical properties and waterproof performance has become a problem to be solved in the field of thermoplastic elastomer toughened film composite fabric. SUMMARY

[0003] The purpose of the present application is to provide a toughened film composite fabric and a preparation method thereof to solve the problems existing in the prior art.

[0004] In order to solve the above technical problems, the present application provides the following technical scheme: a toughened film composite fabric, comprising an elastic film, a gel layer and a base cloth layer, the elastic film is obtained by mixing anti-ultraviolet modified polyvinylidene fluoride and poly(1,5-hexadiene alcohol-acrylate) to obtain a casting solution, and electrospinning to obtain the gel layer;

[0005] The gel layer is prepared by mixing polyvinyl alcohol, acrylamide and diallyldimethyl ammonium chloride to obtain a hydrogel, and then coating on the surface of the base cloth layer;

[0006] The base cloth layer is knitted by cross-section PTT fibers and cotton fibers in a mass ratio of 40:60.

[0007] Further, the grammage of the base cloth layer is 120-200 g / m 2 .

[0008] Further, the thickness of the elastic film is 5-10 μm.

[0009] Further, the toughened film composite fabric comprises the following preparation steps:

[0010] (1)Stir 10-40 g polyvinyl alcohol with a molecular weight of 5000-145000 and 80-200 g water in a water bath at 60-90℃ for 2 h to obtain a polyvinyl alcohol solution, add 2-15 g β-cyclodextrin, 10-25 g acrylamide, and 2-8 g diallyldimethylammonium chloride, stir until uniform, then add 0.26 g ammonium persulfate, and continue to incubate at 60-90℃ for 1-4 h to obtain a viscous hydrogel;

[0011] (2) After the base treatment of the base fabric, coat the hydrogel on the surface of the base fabric to obtain a gel fabric, with a coating thickness of 0.3-2.5 mm;

[0012] (3) Dissolve the alkalized polyvinylidene fluoride resin in a solvent to prepare a solution with a concentration of 25%, add an ultraviolet shielding material, continue to stir at 400 r / min, then add benzoyl peroxide to the solution, and continue to stir for 2 h to obtain a modified polyvinylidene fluoride solution; the mass ratio of the alkalized polyvinylidene fluoride resin, the ultraviolet shielding material, and the benzoyl peroxide is 10:1-3:0.2;

[0013] (4) Mix the modified polyvinylidene fluoride solution and poly(1,5-hexadienol-acrylate), with a mass ratio of poly(1,5-hexadienol-acrylate) to alkalized polyvinylidene fluoride resin of 1:10, wherein the poly(1,5-hexadienol-acrylate) is prepared by polymerizing 1,5-hexadienol and acrylate at a molar ratio of 1:5, after stirring and dissolving, the solution is injected into a nozzle through a liquid supply system at a speed of 10 mL / h, the gel fabric is used as a receiving substrate, the distance between the receiving substrate and the spinneret is 50 cm, the voltage is 100 kV, and electrospinning is performed on one side of the gel layer while a mixed gas stream of air and ethanol vapor is sprayed from two directions to the electrospinning jet and the fabric, realizing the microporating of the polyvinylidene fluoride film and laying the foundation for the transformation of the hydrogel into an aerogel, after the electrospinning is completed, the gel is baked at 90-100℃ for 30 min and at 120-130℃ for 120 s, after the baking is completed, the hydrogel is transformed into an aerogel, the solvent in the hydrogel is volatilized, leaving holes, which helps to improve the moisture permeability, and a toughened film composite fabric is obtained.

[0014] Further, the solvent in step (3) is acetone.

[0015] Further, the ultraviolet shielding material in step (3) is a mixture of porous silicon nitride and porous titanium dioxide at a mass ratio of 2:1, which is reacted with methacryloyloxymethyltrimethoxysilane at 70-80℃ for 4-6 h to obtain.

[0016] Further, the porosity of the porous silicon nitride and the porous titanium dioxide is 5-50%, and the average pore size is 10-500 nm.

[0017] Further, the volume fraction of ethanol vapor in the mixed gas stream in step (4) is 40%.

[0018] Further, in step (4), the first direction is that the mixed gas stream jetting port is at an angle of 45° with the electrospinning jet, and the jetting speed is 50 m / s; the second direction is that the mixed gas stream jetting port is at an angle of 90° with the uncoated gel layer side, and the jetting speed is 20 m / s.

[0019] Compared with the prior art, the present application has the following beneficial effects:

[0020] The fabric of the present application adopts a unique three-layer structure design, including an elastic film, a gel layer and a base cloth. The composite structure makes the fabric have a variety of excellent functional properties. The elastic film of the present application is mainly composed of ultraviolet-resistant modified polyvinylidene fluoride and poly(1,5-hexadienol-acrylate) to construct a casting solution, and a microporous membrane is prepared. The poly(1,5-hexadienol-acrylate) elastomer has good compatibility with polyvinylidene fluoride molecules, which can toughen and modify the polyvinylidene fluoride film, so as to obtain an elastic film and improve the elastic properties of the fabric. In addition, poly(1,5-hexadienol-acrylate) contains a certain amount of hydroxyl groups, so that the elastic film has both hydrophilic and hydrophobic properties, and can absorb water vapor transferred from the gel layer and the base cloth. When the temperature rises, the liquefied water further evaporates, realizing the effect of moisture permeability. In addition, poly(1,5-hexadienol-acrylate) has good compatibility with polyvinylidene fluoride molecules, which can "anchor" poly(1,5-hexadienol-acrylate) on the surface of the film, and adjust the micropores of the elastic film to a certain extent, preventing the micropores from being too large and damaging the original waterproof effect, and ensuring that the finally prepared microporous membrane can prevent water droplets from entering and ensure water vapor molecules to be discharged, realizing the effect of waterproof and moisture permeability. DETAILED DESCRIPTION

[0021] The technical solutions in the embodiments of the present application will be clearly and completely described below in combination with the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the present application.

[0022] In order to more clearly illustrate the method provided by the present application, the following examples and comparative examples are described in detail. The test methods of various indexes of the fabric prepared in the following examples and comparative examples are as follows:

[0023] Elasticity: The examples and comparative examples were tested according to the knitted fabric tensile elasticity recovery rate test method FZ / T70006-2004 using Nantong Hongda HD026N electronic fabric strength tester.

[0024] Water vapor permeation: the fabric obtained from each example and comparative example was sealed in a cup containing the same amount of water, and the water vapor permeation after 1 hour was tested according to GB / T12704.

[0025] Waterproof: refer to GB / T4745-2012.

[0026] Sun protection performance test: the fabric prepared in the examples and comparative examples was tested for ultraviolet protection factor (UPF) according to GB / T18830-2009 Textiles-Evaluation of the performance of ultraviolet-protective clothing, and the fabric was cut into pieces of 5mm x 5mm, and the samples were tested using a UV-Vis spectrometer Lambda35 (UV-Vis), wherein the scanning range of the wavelength was set to 200-400nm, and the scanning wavelength interval was 1nm.

[0027] Example 1

[0028] (1) 10g of polyvinyl alcohol with a molecular weight of 5000, 80g of water were stirred in a 60°C water bath for 2h to obtain a polyvinyl alcohol solution, 2g of β-cyclodextrin, 10g of acrylamide, and 2g of diallyldimethyl ammonium chloride were added, stirred uniformly, 0.26g of ammonium persulfate was added, and the reaction was continued in a 60°C water bath for 2h to obtain a viscous hydrogel;

[0029] (2) 10g of deionized water, 80g of 10% mass concentration sodium hydroxide solution, and 0.01g of accelerator 1227 were weighed into a flask, stirred and dispersed to obtain a pretreatment solution; the base fabric was soaked in the pretreatment solution according to a bath ratio of 1:20, immersed at 60°C for 5min, oscillated, washed with water, and dried to obtain a pretreated fabric, and the surface of the fabric was coated with the hydrogel with a coating thickness of 1.0mm to obtain a gel fabric;

[0030] (3) Sodium hydroxide was added to deionized water and stirred until completely dissolved, then potassium permanganate was added and continued to be stirred until the potassium permanganate was completely dissolved to obtain an alkalization solution; 1 x 10 6 The polyvinylidene fluoride resin was added to the alkalization solution and heated in a water bath, the alkalization temperature was 70°C, the alkalization time was 10h, after the alkalization was completed, the alkalized polyvinylidene fluoride resin was washed with deionized water several times until the washing water was neutral; finally, the alkalized polyvinylidene fluoride resin treated and washed with water was placed in a constant temperature drying oven at 60°C and dried for 12h to obtain an alkalized polyvinylidene fluoride resin; the mass ratio of polyvinylidene fluoride resin: sodium hydroxide: potassium permanganate: deionized water was 5:6:2:50;

[0031] (4) porous silicon nitride, porous titanium dioxide mixed in a mass ratio of 2:1, added to a mixture of anhydrous ethanol, methacryloyloxymethyltrimethoxysilane and water (mass ratio of 7:2:1), configured into a solid dispersion solution with a mass fraction of 1%, stirred for 10 min, ultrasonically dispersed for 20 min, under the conditions of a constant temperature oil bath at 70°C and mechanical stirring at 800 r / min, incubated for 6 h, after the reaction was completed, filtered, washed, and the product was placed in a vacuum drying oven at 80°C for drying for 8 h, to obtain an ultraviolet shielding material;

[0032] (5) the alkalized polyvinylidene fluoride resin was dissolved in acetone to prepare a solution with a concentration of 25%, the ultraviolet shielding material was added, and then benzoyl peroxide was added to the solution under stirring at 400 r / min, and the stirring was continued for 2 h, to obtain a modified polyvinylidene fluoride solution; the mass ratio of the alkalized polyvinylidene fluoride resin, the ultraviolet shielding material and the benzoyl peroxide was 10:1:0.2;

[0033] (6) the modified polyvinylidene fluoride solution and the poly(1,5-hexadienol-acrylate) were mixed, and the mass ratio of the poly(1,5-hexadienol-acrylate) to the alkalized polyvinylidene fluoride resin was 1:10, after stirring and dissolving, the solution was filled into a spinneret through a liquid supply system at a supply speed of 10 mL / h, a gel fabric was used as a receiving substrate, the distance between the receiving substrate and the spinneret was 50 cm, the voltage applied was 100 kV, and electrospinning was performed on one side of the gel layer, while a mixed gas stream of air and ethanol vapor was sprayed from two directions to the electrospinning jet and the fabric, the first direction was at an angle of 45° between the mixed gas stream blowing port and the electrospinning jet, the blowing speed was 50 m / s, the second direction was at an angle of 90° between the mixed gas stream blowing port and the side of the fabric without the gel layer, the blowing speed was 20 m / s, the volume fraction of ethanol vapor in the mixed gas stream was 40%, after the electrospinning was completed, the fabric was baked at 90°C for 30 min and at 120°C for 120 s, to obtain a toughened film composite fabric.

[0034] Example 2

[0035] (1) 25 g of polyvinyl alcohol with a molecular weight of 75,000, 100 g of water were stirred in a water bath at 80°C for 2 h to obtain a polyvinyl alcohol solution, 7 g of β-cyclodextrin, 10 g of acrylamide and 2 g of diallyldimethyl ammonium chloride were added, after stirring uniformly, 0.26 g of ammonium persulfate was added, and the incubation reaction was continued in a water bath at 80°C for 2 h, to obtain a water gel with viscosity;

[0036] (2) Take 10 g of deionized water, 80 g of 10% mass concentration sodium hydroxide solution and 0.01 g of accelerator 1227 into a flask, stir and disperse to prepare a pretreatment liquid; take the base cloth, soak it in the pretreatment liquid according to a bath ratio of 1:20, immerse it in the pretreatment liquid at 60°C for 5 min, oscillate and react, wash with water and dry to obtain a pretreated fabric, and coat a hydrogel on the surface of the pretreated fabric with a coating thickness of 1.0 mm to obtain a gel fabric;

[0037] (3) Add sodium hydroxide to deionized water, stir until completely dissolved, then add potassium permanganate, continue to stir until the potassium permanganate is completely dissolved to prepare an alkalization liquid; add 1×10 6 The polyvinylidene fluoride resin is added to the alkalization liquid, heated in a water bath, the alkalization temperature is 70°C, the alkalization time is 10 h, after the alkalization is completed, the alkalized polyvinylidene fluoride resin is washed with deionized water for multiple times until the washing water is neutral; finally, the alkalized polyvinylidene fluoride resin treated and washed clean is placed in a constant temperature drying oven at 60°C for drying for 12 h to prepare an alkalized polyvinylidene fluoride resin; the mass ratio of polyvinylidene fluoride resin: sodium hydroxide: potassium permanganate: deionized water is 5:6:2:50;

[0038] (4) The porous silicon nitride and the porous titanium dioxide are mixed according to a mass ratio of 2:1, added to a mixture of anhydrous ethanol, methacryloyloxymethyltrimethoxysilane and water (mass ratio of 7:2:1) to prepare a solid dispersion liquid with a mass fraction of 1%, stirred for 10 min, ultrasonically dispersed for 20 min, and reacted at 70°C in a constant temperature oil bath under the condition of mechanical stirring at 800 r / min for 6 h; after the reaction is completed, the product is filtered, washed, and dried in a vacuum drying oven at 80°C for 8 h to obtain an ultraviolet shielding material;

[0039] (5) The alkalized polyvinylidene fluoride resin is dissolved in acetone to prepare a solution with a concentration of 25%, the ultraviolet shielding material is added, and then benzoyl peroxide is added to the solution under stirring at 400 r / min, and the stirring is continued for 2 h to obtain a modified polyvinylidene fluoride solution; the mass ratio of the alkalized polyvinylidene fluoride resin, the ultraviolet shielding material and the benzoyl peroxide is 10:2:0.2;

[0040] (6) The modified polyvinylidene fluoride solution, poly(1,5-hexadienol-acrylate) are mixed, the mass ratio of poly(1,5-hexadienol-acrylate) and alkali polyvinylidene fluoride resin is 1:10, after stirring and dissolving, the solution is filled into the nozzle by the liquid supply system, the liquid supply speed is 10 mL / h, the gel fabric is used as the receiving substrate, the distance between the receiving substrate and the spinneret is 50 cm, the voltage is 100 kV, electrospinning is carried out to the gel layer side, and the electrospinning jet and the fabric are blown from two directions by the mixed gas flow of air and ethanol vapor, the first direction is that the mixed gas flow blowing port is at an angle of 45° with the electrospinning jet, the blowing speed is 50 m / s, the second direction is that the mixed gas flow blowing port is at an angle of 90° with the uncoated gel layer side, the blowing speed is 20 m / s, the volume fraction of ethanol vapor in the mixed gas flow is 40%, after electrospinning, baking is carried out at 95℃ for 30 min and at 125℃ for 120 s, and a toughened film composite fabric is obtained.

[0041] Example 3

[0042] (1) 40 g of polyvinyl alcohol with a molecular weight of 145000, 150 g of water are stirred in a 90℃ water bath for 2 h to obtain a polyvinyl alcohol solution, 15 g of β-cyclodextrin, 25 g of acrylamide and 8 g of diallyldimethyl ammonium chloride are added, stirred uniformly, 0.26 g of ammonium persulfate is added, and the reaction is continued in a 90℃ water bath for 1-4 h to obtain a water gel with viscosity;

[0043] (2) 10 g of deionized water, 80 g of 10% mass concentration sodium hydroxide solution and 0.01 g of accelerator 1227 are weighed into a flask, stirred and dispersed to prepare a pretreatment liquid; the base fabric is soaked in the pretreatment liquid according to a bath ratio of 1:20, immersed at 60℃ for 5 min, oscillation reaction, washed with water and dried to obtain a pretreated fabric, and the surface of the pretreated fabric is coated with a water gel with a coating thickness of 1.0 mm to obtain a gel fabric;

[0044] (3) Sodium hydroxide is added to deionized water and stirred until completely dissolved, then potassium permanganate is added and continues to be stirred until the potassium permanganate is completely dissolved to prepare an alkali solution; 1×10 6 The polyvinylidene fluoride resin is added to the alkali solution, heated in a water bath, the alkali temperature is 70℃, the alkali time is 10 h, after the alkali is completed, the alkali polyvinylidene fluoride resin is washed with deionized water for multiple times until the washing water is neutral; finally, the alkali treated and washed clean polyvinylidene fluoride resin is placed in a constant temperature drying oven at 60℃ and dried for 12 h to obtain an alkali polyvinylidene fluoride resin; the mass ratio of polyvinylidene fluoride resin: sodium hydroxide: potassium permanganate: deionized water is 5:6:2:50;

[0045] (4) porous silicon nitride, porous titanium dioxide mixed in a mass ratio of 2:1, added to a mixture of anhydrous ethanol, methacryloyloxymethyltrimethoxysilane and water (mass ratio of 7:2:1), configured into a solid dispersion solution with a mass fraction of 1%, stirred for 10 min, ultrasonic dispersed for 20 min, under the condition of constant temperature oil bath at 70°C and mechanical stirring at 800 r / min, incubated for 6 h, after the reaction was completed, filtered, washed, and the product was placed in a vacuum drying oven at 80°C for drying for 8 h, to obtain the ultraviolet shielding material;

[0046] (5) the alkalized polyvinylidene fluoride resin was dissolved in acetone to prepare a solution with a concentration of 25%, the ultraviolet shielding material was added, and benzoyl peroxide was added to the solution under stirring at 400 r / min, and the stirring was continued for 2 h to obtain a modified polyvinylidene fluoride solution; the mass ratio of the alkalized polyvinylidene fluoride resin, the ultraviolet shielding material and the benzoyl peroxide was 10:3:0.2;

[0047] (6) the modified polyvinylidene fluoride solution and the poly(1,5-hexadienol-acrylate) were mixed, and the mass ratio of the poly(1,5-hexadienol-acrylate) to the alkalized polyvinylidene fluoride resin was 1:10; after being stirred and dissolved, the solution was filled into a nozzle through a liquid supply system at a supply speed of 10 mL / h; a gel fabric was used as a receiving substrate, the distance between the receiving substrate and the nozzle was 50 cm, the voltage applied was 100 kV, and electrospinning was performed on the gel layer side, while a mixed gas stream of air and ethanol vapor was sprayed from two directions to the electrospinning jet and the fabric; the first direction was that the mixed gas stream spraying port and the electrospinning jet formed an angle of 45°, and the spraying speed was 50 m / s; the second direction was that the mixed gas stream spraying port and the side of the fabric without the gel layer formed an angle of 90°, and the spraying speed was 20 m / s; the volume fraction of ethanol vapor in the mixed gas stream was 40%; after electrospinning was completed, the fabric was baked at 100°C for 30 min and at 130°C for 120 s to obtain a toughened film composite fabric.

[0048] Comparative Example 1

[0049] The difference between Comparative Example 1 and Example 3 lies in step (1), which is changed to: polyvinyl alcohol is dissolved in an organic solvent at 120°C to prepare a polyvinyl alcohol solution, and the organic solvent is a blended solvent of dimethyl sulfoxide and N-N, dimethylformamide, wherein the volume ratio of dimethyl sulfoxide to N-N, dimethylformamide is 1; the mass concentration of the obtained polyvinyl alcohol solution is 20%, and the solution is cooled to room temperature to form a gel after standing; the remaining steps are the same as those of Example 3.

[0050] Comparative Example 2

[0051] The difference between Comparative Example 2 and Example 3 lies in that no ultraviolet shielding material is added, and the remaining steps are the same as those of Example 3.

[0052] Comparative Example 3

[0053] Comparative Example 3 differs from Example 3 in that no poly(1,5- hexanediol-acrylate) is added, the rest of the steps are the same as Example 3.

[0054] Effect Example

[0055] The performance analysis results of the fabric using Examples 1 to 3 and Comparative Examples 1 to 3 of the present application are given in Table 1 below.

[0056] Table 1

[0057]

[0058] The fabric involved in the present application adopts a unique three-layer structure design, including an elastic film, a gel layer and a base cloth. This composite structure makes the fabric have a variety of excellent functional properties. First of all, the existence of the elastic film and the gel layer endows the fabric with good elastic properties, which can adapt to various wearing needs and provide a comfortable wearing experience. Secondly, the elastic film ensures the waterproof and ultraviolet resistance of the fabric, and builds a moisture-permeable composite layer with the gel layer. The fabric of the present application realizes the multiple effects of waterproofness, moisture permeability and elasticity through the ingenious combination of the three-layer structure, providing new possibilities for the application of modern textiles.

[0059] It is apparent to those skilled in the art that the present application is not limited to the details of the foregoing exemplary embodiments, and that the present application can be implemented in other specific forms without departing from the spirit or essential characteristics of the present application. Therefore, the embodiments should be considered in all respects as illustrative and not restrictive, and the scope of the present application should be defined by the appended claims rather than the above description, and it is intended to include all changes falling within the meaning and scope of equivalents of the claims. Any mark in the claims should not be considered as limiting the involved claims.

Claims

1. A toughened film composite fabric, comprising an elastic film, a gel layer, and a base fabric layer, characterized in that, The elastic membrane is prepared by electrospinning a casting solution made from a mixture of UV-resistant modified polyvinylidene fluoride and poly(1,5-hexadienol-acrylate) onto a gel layer. The gel layer is prepared by mixing polyvinyl alcohol, acrylamide, and diallyl dimethyl ammonium chloride to form a hydrogel, which is then coated on the surface of the base fabric layer. The base fabric layer is woven from PTT fibers and cotton fibers with a cross-shaped cross section in a mass ratio of 40:

60.

2. The toughened film composite fabric according to claim 1, characterized in that, The base fabric layer has a basis weight of 120~200 g / m². 2 .

3. The toughened film composite fabric according to claim 1, characterized in that, The thickness of the elastic membrane is 5~10μm.

4. The method for preparing a toughened film composite fabric according to claim 1, characterized in that, The preparation steps include the following: (1) 10-40g of polyvinyl alcohol with a molecular weight of 5000-145000 and 80-200g of water are stirred in a water bath at 60-90℃ for 2h to obtain a polyvinyl alcohol solution. 2-15g of β-cyclodextrin, 10-25g of acrylamide and 2-8g of diallyl dimethyl ammonium chloride are added and stirred evenly. Then, 0.26g of ammonium persulfate is added and the reaction is continued in a water bath at 60-90℃ for 1-4h to obtain a viscous hydrogel. (2) After the base fabric is treated with alkali, hydrogel is coated on its surface with a coating thickness of 0.3~2.5mm to obtain gel fabric; (3) Alkalize the polyvinylidene fluoride resin in a solvent to prepare a 25% solution, add the UV shielding material, stir at 400 r / min, add benzoyl peroxide to the solution, and continue stirring for 2 h to obtain the modified polyvinylidene fluoride solution. The mass ratio of alkalized polyvinylidene fluoride resin, UV shielding material, and benzoyl peroxide is 10:1 to 3:0.

2. (4) The modified polyvinylidene fluoride solution and poly(1,5-hexadienol-acrylate) are mixed. The mass ratio of poly(1,5-hexadienol-acrylate) to alkalized polyvinylidene fluoride resin is 1:

10. After stirring and dissolving, the solution is injected into the nozzle through the liquid supply system at a liquid supply rate of 10 mL / h. The gel fabric is used as the receiving substrate. The distance from the receiving substrate to the spinneret is 50 cm. The applied voltage is 100 kV. Electrospinning is performed on one side of the gel layer. At the same time, a mixed airflow of air and ethanol vapor is sprayed from two directions onto the electrospinning jet and the fabric. After electrospinning is completed, the fabric is baked at 90-100℃ for 30 min and at 120-130℃ for 120 s to obtain the toughened film composite fabric. The poly(1,5-hexadienol-acrylate) is prepared by polymerizing 1,5-hexadienol and acrylate in a molar ratio of 1:

5.

5. The method for preparing a toughened film composite fabric according to claim 4, characterized in that, The solvent used in step (3) is acetone.

6. The method for preparing a toughened film composite fabric according to claim 4, characterized in that, The ultraviolet shielding material in step (3) is prepared by mixing porous silicon nitride and porous titanium dioxide in a mass ratio of 2:1 and reacting them with methacryloyloxymethyltrimethoxysilane at 70-80℃ for 4-6 hours.

7. The method for preparing a toughened film composite fabric according to claim 4, characterized in that, In step (4), the volume fraction of ethanol vapor in the mixed gas stream is 40%.

8. The method for preparing a toughened film composite fabric according to claim 4, characterized in that, In step (4), the first direction is a 45° angle between the mixed airflow nozzle and the electrospinning jet, with a blowing speed of 50 m / s. The second direction is a 90° angle between the mixed airflow nozzle and the side without the gel layer, with a blowing speed of 20 m / s.

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