High-strength wear-resistant nano-composite fiber fabric and preparation method thereof

Abstract

The invention discloses a high-strength wear-resistant nano-composite fiber fabric and a preparation method thereof, and relates to the technical field of textile fabrics, pretreated polyvinylpyrrolidone is dissolved in a mixed solution of deionized water and dimethylformamide in a volume ratio of 7: 3, modified silicon dioxide and modified titanium dioxide are added, the mixture is stirred uniformly, and the high-strength wear-resistant nano-composite fiber fabric is obtained. Dissolving polyacrylonitrile in dimethylformamide, dropwise adding into the premixed solution, stirring and performing ultrasonic treatment to complete preparation of a spinning solution, then pretreating the spinning solution, adding into an injector, and preparing the fiber fabric by adopting electrostatic spinning. According to the preparation method, titanium dioxide and silicon dioxide are modified and then added into a polyvinylpyrrolidone solution in sequence before polyacrylonitrile is added, so that the function of uniformly dispersing nano-particles is realized, the problems of nano-particle agglomeration, interface bonding failure and solvent polarity mismatch are solved, nano-ions can be uniformly dispersed, and the stability of the nano-particles is improved. A stress concentration point is eliminated, and the interface bonding strength of the nano particles and a matrix is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of textile fabrics, in particular to a high-strength wear-resistant nano-composite fiber fabric and a preparation method thereof. Background Art

[0002] Although early high-performance synthetic fibers such as aramid have the advantages of high strength, high temperature resistance and light weight, their smooth surface and strong inertness lead to insufficient composite interface strength with the polymer matrix, making it difficult to meet the long-term wear and tear resistance requirements under extreme conditions. Nanofibers have a diameter controlled between 10nm and 100nm, and their ultra-high specific surface area significantly enhances the physical / chemical bonding between the fiber and the matrix.

[0003] During the preparation of nanocomposite fibers, the van der Waals forces between nanoparticles dominate the aggregation, forming micron-sized aggregates, which reduces the effective surface area and active sites. Polar nanofillers are difficult to wet in the non-polar polymer matrix, which will lead to interface defects and reduce the performance of the fabric.

[0004] Patent CN114083877B discloses nanofiber composite fabrics and their production methods. The above patent realizes the addition of a hydrophilic agent to the electrospinning solution, so that the prepared nanofibers have hydrophilic properties. Sweat can be introduced into the composite fabric, avoiding the defect of traditional nanofiber composite fabrics that cannot pass through sweat, and improving wearing comfort.

[0005] The above patent prepares an electrospinning solution containing a hydrophilic agent and adopts an electrospinning process to make the electrospinning solution pass through a high-pressure jet to form nanofibers with hydrophilic properties on the inner base cloth after gluing, thereby preparing an intermediate fabric with a nanofiber membrane / inner base cloth structure, and laminating the intermediate fabric with the outer base cloth after gluing to prepare a nanofiber composite fabric with a composite structure of outer base cloth / nanofiber membrane / inner base cloth, which improves wearing comfort and leaves room for optimization in the uniformity of dispersion of nanofillers.

[0006] To this end, the present application proposes a high-strength, wear-resistant nano-composite fiber fabric with uniformly dispersed nano-fillers and a preparation method thereof. Summary of the Invention

[0007] The purpose of the present invention is to provide a high-strength and wear-resistant nano-composite fiber fabric and a preparation method thereof, so as to solve the technical problem raised in the above background technology that nanoparticles are prone to agglomeration and affect the performance of the fabric.

[0008] To achieve the above object, the present invention provides the following technical solution: a method for preparing a high-strength wear-resistant nanocomposite fiber fabric, the preparation method comprising:

[0009] S1: preparing silicon dioxide and titanium dioxide, drying the silicon dioxide and titanium dioxide, and then modifying them to obtain modified silicon dioxide and modified titanium dioxide;

[0010] S2: Dissolve the pretreated polyvinylpyrrolidone in a mixed solution of deionized water and dimethylformamide in a volume ratio of 7:3, and stir magnetically in a constant temperature environment of 50℃ to 60℃ for 6 hours;

[0011] S3: adding modified silicon dioxide and modified titanium dioxide to the polyvinyl pyrrolidone solution and performing ultrasonic dispersion treatment to obtain a premixed solution;

[0012] S4: dissolving polyacrylonitrile in dimethylformamide and adding it dropwise to the premixed solution, and completing the spinning solution preparation through stirring and ultrasonic treatment;

[0013] S5: The spinning solution is pretreated and added to the syringe, and the fiber fabric is prepared by electrospinning.

[0014] Preferably, the S1 is specifically:

[0015] S11: After drying silica in a vacuum environment at 105°C for 6 hours, a mixed solvent of ethanol and acetic acid in a volume ratio of 4:1 was added, and ultrasonic treatment was performed for 10 minutes to obtain a mixed solution A. After drying titanium dioxide in an environment at 120°C for 4 hours, a dilute nitric acid solution with a pH of 3 was added, and ultrasonic treatment was performed for 30 minutes to obtain a mixed solution B.

[0016] S12: adding ethanol solution and acetic acid solution to the silane coupling agent in sequence, adjusting the pH to 4.5-5.5, stirring and hydrolyzing at room temperature for 30 minutes, and then adding to the mixed solution A, reacting at a stirring rate of 300 rpm-500 rpm in a constant temperature environment of 60°C for 6 hours, centrifuging at a speed of 8000 rpm for 10 minutes, washing with ethanol and deionized water three times in sequence, and drying in a vacuum environment at 60°C for 12 hours to obtain modified silica;

[0017] S13: Add aluminum sulfate solution to the mixed solution B, control the temperature at 70°C, add ammonia water dropwise until the pH is 7-8, add the product to a centrifuge, centrifuge at 10,000 rpm for 15 minutes, rinse with deionized water until neutral to obtain modified titanium dioxide, and store the prepared modified titanium dioxide in 95% ethanol at a temperature of 2°C to 8°C.

[0018] Preferably, the concentration of the polyvinyl pyrrolidone solution in S2 is 6% to 10%, and the magnetic stirring is carried out at a speed of 200 rpm for 1 hour to 2 hours, and then the speed is increased to 300 rpm to 400 rpm and the stirring is continued for 4 hours to 5 hours.

[0019] Preferably, the S3 is specifically:

[0020] S31: Add 0.5% anionic dispersant to the polyvinyl pyrrolidone solution and stir at 800 rpm in a constant temperature environment of 50°C for 10 minutes;

[0021] S32: Modified titanium dioxide stored in ethanol was slowly injected at a flow rate of 0.5 mL / min using a constant flow pump, and the mixture was kept in a water bath at a temperature of 45°C to 50°C. The mixture was sheared at 8000 rpm for 15 min using a high-speed homogenizer, and then ultrasonicated at 40 kHz for 20 min to obtain a mixed system A.

[0022] S33: Lowering the temperature of the mixed system A to 35°C to 40°C, adding ethanol so that the ethanol content in the mixed system A is 70%, and adding the modified silica pre-dispersed in ethanol dropwise to the mixed system A at a rate of 1 mL / min;

[0023] S34: Mechanically stirring at 300 rpm for 20 min, followed by ultrasonic stirring at 40 kHz for 30 min to obtain a premixed solution.

[0024] Preferably, the S4 is specifically:

[0025] S41: lowering the temperature of the premixed solution to 40°C to 45°C, and adding dimethylformamide to adjust the dimethylformamide content in the premixed solution to 60%;

[0026] S42: The polyacrylonitrile powder was dried in a vacuum environment at 80°C for 4 h, and then the polyacrylonitrile powder was sprinkled into a 10°C dimethylformamide solution at a rate of 5 g / min and stirred at 200 rpm for 20 min to form a 10% suspension;

[0027] S43: adding the suspension to the treated premixed solution at a rate of 1 mL / min, and performing ultrasonic treatment at 40 kHz while stirring at 400 rpm in an environment of 25°C to 30°C;

[0028] S44: Raise the temperature to 50°C and continue stirring for 2 h until the polyacrylonitrile is completely dissolved;

[0029] S45: The temperature was raised to 65° C. and the mixture was stirred at 5000 rpm for 10 min to obtain a spinning solution.

[0030] Preferably, the S5 is specifically:

[0031] S51: The spinning solution was pretreated by ultrasonic oscillation for 20 min, and then the spinning solution was injected into a syringe. The syringe pushed the spinning solution into an electric field with an initial voltage of 18 kV and an ambient humidity of 30% at a rate of 0.2 mL / h to 0.5 mL / h;

[0032] S52: Increase the electric field voltage to 20 kV to 25 kV at a rate of 1 kV / 5 min;

[0033] S53: Setting a roller with a rotation speed of 2000 rpm to receive the fiber fabric at a distance of 12 cm to 18 cm from the syringe;

[0034] S54: The fiber fabric is immersed in low-temperature water at 5° C. to 40° C. for cleaning, and then placed in a 120° C. environment for heat treatment for 1 hour, and then the temperature is raised to 160° C. for heat treatment for 0.5 hour to obtain a finished fiber fabric.

[0035] Preferably, the mass ratio of polyvinyl pyrrolidone, titanium dioxide, silicon dioxide and polyacrylonitrile is 1:0.8:5:10-15.

[0036] Preferably, the concentration of the aluminum sulfate solution added in S13 is 3%.

[0037] Preferably, the anionic dispersant added in S31 is sodium lauryl sulfate.

[0038] Preferably, the nanocomposite fiber fabric is prepared by the preparation method.

[0039] Compared with the prior art, the present invention has the following beneficial effects:

[0040] 1. The present invention achieves uniform dispersion of nanoparticles by sequentially adding modified titanium dioxide and silicon dioxide to the polyvinyl pyrrolidone solution before adding polyacrylonitrile. This solves the problems of nanoparticle agglomeration, interfacial bonding failure, and solvent polarity mismatch, enables uniform dispersion of nanoparticles, eliminates stress concentration points, and improves the interfacial bonding strength between the nanoparticles and the substrate.

[0041] 2. By using polyvinyl pyrrolidone and polyacrylonitrile as raw materials, the present invention achieves the function of synergistic and complementary molecular structures, solving the problems of molecular chain slippage, load-bearing capacity collapse, brittle fracture intensification, and solvent residue defects. The complementary properties of polyvinyl pyrrolidone and polyacrylonitrile can enhance the strength and toughness of the finished fabric, improve the load-bearing capacity of the finished fabric, reduce the density of microcracks on the surface of the finished fabric, and improve the filtering and protective efficiency of the finished fabric.

[0042] 3. The present invention uses deionized water and dimethylformamide as solvents, thereby reducing the use of organic solvents, solving the problems of solvent residue, high organic solvent costs, and high environmental pressure. The water phase can reduce the generation of surface microcracks, improve the performance of the finished fiber fabric, and reduce environmental pollution.

[0043] 4. The present invention achieves the function of stabilizing fiber orientation by designing a gradient-enhanced electric field intensity during the electrospinning stage of the spinning solution, solves the problems of disordered fiber orientation, fiber diameter fluctuation and nanoparticle agglomeration, can suppress phase separation out of control by matching the solvent volatilization rate through segmented voltage, improves the quality of the finished fiber, and optimizes the segmented stability of the fiber jet. BRIEF DESCRIPTION OF THE DRAWINGS

[0044] Figure 1 This is a schematic diagram of the fiber fabric preparation process of the present invention;

[0045] Figure 2 This is a schematic diagram of the preparation process of modified titanium dioxide of the present invention;

[0046] Figure 3 This is a schematic diagram of the preparation process of modified silicon dioxide of the present invention;

[0047] Figure 4 This is a schematic diagram of the process for preparing the premix solution of the present invention;

[0048] Figure 5 Schematic diagram of the spinning solution preparation process of the present invention;

[0049] Figure 6 Schematic diagram of the electrospinning process of the present invention. DETAILED DESCRIPTION

[0050] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0051] Example 1: Please refer to Figure 1 、 Figure 2 、 Figure 3 、 Figure 4 、 Figure 5 and Figure 6 , a preparation method of a high-strength wear-resistant nanocomposite fiber fabric, the preparation method is:

[0052] S1: preparing silicon dioxide and titanium dioxide, drying the silicon dioxide and titanium dioxide, and then modifying them to obtain modified silicon dioxide and modified titanium dioxide;

[0053] S2: Dissolve the pretreated polyvinylpyrrolidone in a mixed solution of deionized water and dimethylformamide in a volume ratio of 7:3, and stir magnetically at a constant temperature of 50°C for 6 h;

[0054] S3: adding modified silicon dioxide and modified titanium dioxide to the polyvinyl pyrrolidone solution and performing ultrasonic dispersion treatment to obtain a premixed solution;

[0055] S4: dissolving polyacrylonitrile in dimethylformamide and adding it dropwise to the premixed solution, and completing the spinning solution preparation through stirring and ultrasonic treatment;

[0056] S5: adding the spinning solution into the syringe after pretreatment, and preparing the fiber fabric by electrospinning;

[0057] The S1 is specifically:

[0058] S11: After drying silica in a vacuum environment at 105°C for 6 hours, a mixed solvent of ethanol and acetic acid in a volume ratio of 4:1 was added, and ultrasonic treatment was performed for 10 minutes to obtain a mixed solution A. After drying titanium dioxide in an environment at 120°C for 4 hours, a dilute nitric acid solution with a pH of 3 was added, and ultrasonic treatment was performed for 30 minutes to obtain a mixed solution B.

[0059] S12: adding ethanol solution and acetic acid solution to the silane coupling agent in sequence, adjusting the pH to 5, stirring and hydrolyzing at room temperature for 30 minutes, and then adding to the mixed solution A, reacting at a constant temperature of 60°C at a stirring rate of 400 rpm for 6 hours, centrifuging at a speed of 8000 rpm for 10 minutes, washing with ethanol and deionized water three times in sequence, and drying in a vacuum environment at 60°C for 12 hours to obtain modified silica;

[0060] S13: Aluminum sulfate solution was added to the mixed solution B, the temperature was controlled at 70°C, ammonia water was added dropwise until the pH was 7, the product was added to a centrifuge, and centrifuged at 10,000 rpm for 15 minutes. The product was rinsed with deionized water until neutral to obtain modified titanium dioxide, and the prepared modified titanium dioxide was stored in 95% ethanol at 5°C;

[0061] The concentration of the polyvinyl pyrrolidone solution in S2 is 10%, and the magnetic stirring is carried out at a speed of 200 rpm for 2 hours, and then the speed is increased to 400 rpm and stirring is continued for 4 hours;

[0062] The S3 is specifically:

[0063] S31: Add 0.5% anionic dispersant to the polyvinyl pyrrolidone solution and stir at 800 rpm in a constant temperature environment of 50°C for 10 minutes;

[0064] S32: Modified titanium dioxide stored in ethanol was slowly injected at a flow rate of 0.5 mL / min using a constant flow pump, and the mixture was kept in a water bath at 45°C. The mixture was sheared at 8000 rpm for 15 min using a high-speed homogenizer, and then ultrasonicated at 40 kHz for 20 min to obtain a mixed system A.

[0065] S33: lowering the temperature of the mixed system A to 35° C., adding ethanol so that the ethanol content in the mixed system A is 70%, and adding the modified silica pre-dispersed in ethanol dropwise to the mixed system A at a rate of 1 mL / min;

[0066] S34: mechanically stirring at 300 rpm for 20 min, followed by ultrasonic stirring at 40 kHz for 30 min to obtain a premixed solution;

[0067] The S4 is specifically:

[0068] S41: lowering the temperature of the premixed solution to 40°C, and adding dimethylformamide to make the dimethylformamide content in the premixed solution 60%;

[0069] S42: The polyacrylonitrile powder was dried in a vacuum environment at 80°C for 4 h, and then the polyacrylonitrile powder was sprinkled into a 10°C dimethylformamide solution at a rate of 5 g / min and stirred at 200 rpm for 20 min to form a 10% suspension;

[0070] S43: adding the suspension to the treated premixed solution at a rate of 1 mL / min, and performing ultrasonic treatment at 40 kHz while stirring at 400 rpm in an environment of 25°C;

[0071] S44: Raise the temperature to 50°C and continue stirring for 2 h until the polyacrylonitrile is completely dissolved;

[0072] S45: raising the temperature to 65° C. and stirring at 5000 rpm for 10 min to obtain a spinning solution;

[0073] The S5 is specifically:

[0074] S51: The spinning solution was pretreated by ultrasonic oscillation for 20 min, and then injected into a syringe. The syringe pushed the spinning solution into an electric field with an initial voltage of 18 kV and an ambient humidity of 30% at a rate of 0.3 mL / h.

[0075] S52: Increase the electric field voltage to 25 kV at a rate of 1 kV / 5 min;

[0076] S53: Setting a roller with a rotation speed of 2000 rpm to receive the fiber fabric at a distance of 15 cm from the syringe;

[0077] S54: Immersing the fiber fabric in low-temperature water at 15° C. for cleaning, and then placing it in a 120° C. environment for heat treatment for 1 hour, and then raising the temperature to 160° C. for heat treatment for 0.5 hour to obtain a finished fiber fabric;

[0078] The mass ratio of polyvinyl pyrrolidone, titanium dioxide, silicon dioxide and polyacrylonitrile is 1:0.8:5:10;

[0079] The concentration of the aluminum sulfate solution added in S13 is 3%;

[0080] The anionic dispersant added in S31 is sodium lauryl sulfate;

[0081] Further, sufficient amounts of polyvinyl pyrrolidone, titanium dioxide, silicon dioxide and polyacrylonitrile were prepared in a mass ratio of 1:0.8:5:10, and the polyvinyl pyrrolidone was dried in a vacuum environment at 40°C for 24 hours, the titanium dioxide was dried in a 120°C environment for 4 hours, the silicon dioxide was dried in a vacuum environment at 105°C for 6 hours, and the polyacrylonitrile was dried in a vacuum environment at 80°C for 4 hours. A mixed solvent of ethanol and acetic acid with a volume ratio of 4:1 and a weight of 3 times the mass of the silicon dioxide was added to the silicon dioxide, and ultrasonic treatment was performed at 28kHz for 5 minutes and then at 40kHz for 5 minutes to obtain a mixed solution A. The ethanol solution and the acetic acid solution were added to the silane coupling agent to adjust the pH to 5, and the mixture was stirred and hydrolyzed at room temperature for 30 minutes and then added to the mixed solution A. The silane coupling agent The mass ratio of the hydrolyzate to the mixed solution A is 1:30, and then the mixture is stirred at 400 rpm in a constant temperature environment at 60°C for 6 hours. After the reaction is completed, it is separated by high-speed centrifugation at 8000 rpm for 10 minutes. After washing with ethanol and deionized water three times in sequence, it is dried in a vacuum environment at 60°C for 12 hours to obtain modified silica. A dilute nitric acid solution with a pH of 3 is added to the titanium dioxide, and ultrasonic treatment is performed for 30 minutes to obtain a mixed solution B. A 3% aluminum sulfate solution is added to the mixed solution B, the temperature is controlled at 70°C, and ammonia water is added dropwise to pH = 7. The product is added to a centrifuge and centrifuged at 10000 rpm for 15 minutes. It is rinsed with deionized water until neutral to obtain modified titanium dioxide, and the prepared modified titanium dioxide is stored in 95% ethanol at a temperature of 5°C.

[0082] The pretreated polyvinyl pyrrolidone was dissolved in a mixed solution of deionized water and dimethylformamide in a volume ratio of 7:3, and magnetically stirred at 200 rpm for 2 h in a constant temperature environment of 50°C. The speed was then increased to 400 rpm and stirred for another 4 h to obtain a polyvinyl pyrrolidone solution with a concentration of 10%;

[0083] Sodium lauryl sulfate with a concentration of 0.5% was added to the polyvinyl pyrrolidone solution, and the mixture was stirred at a constant temperature of 50°C for 10 minutes at a speed of 800 rpm. The modified titanium dioxide stored in ethanol was slowly injected through a constant flow pump at a flow rate of 0.5 mL / min, and the temperature was maintained at 45°C for a water bath. The mixture was sheared at a speed of 8000 rpm for 15 minutes by a high-speed homogenizer, and then ultrasonically treated at 40 kHz for 20 minutes to obtain a mixed system A. The temperature of the mixed system A was lowered to 35°C, and ethanol was added to make the ethanol content in the mixed system A 70%. The modified silica pre-dispersed in ethanol was added dropwise to the mixed system A at a rate of 1 mL / min, and mechanically stirred at a speed of 300 rpm for 20 minutes, and then ultrasonically stirred at 40 kHz for 30 minutes to obtain a premixed solution.

[0084] The temperature of the premix was lowered to 40°C, dimethylformamide was added to make the dimethylformamide content in the premix 60%, the polyacrylonitrile powder was dried in a vacuum environment at 80°C for 4 hours, and then the polyacrylonitrile powder was sprinkled into a 10°C dimethylformamide solution at a rate of 5 g / min, and stirred at 200 rpm for 20 minutes to form a 10% suspension. The suspension was added dropwise to the treated premix at a rate of 1 mL / min, and ultrasonic treatment was performed at 40 kHz while stirring at 400 rpm in a 25°C environment. The temperature was raised to 50°C and stirred for 2 hours until the polyacrylonitrile was completely dissolved. The temperature was raised to 65°C. , stirring at 5000 rpm for 10 minutes to obtain a spinning solution, pre-treating the spinning solution by ultrasonic vibration for 20 minutes, and then injecting the spinning solution into a syringe, and the syringe pushes the spinning solution into an electric field with an ambient humidity of 30% and an initial voltage of 18 kV at a speed of 0.3 mL / h, and the electric field voltage is increased to 25 kV at a rate of 1 kV / 5 minutes. A drum with a rotation speed of 2000 rpm is set at 15 cm away from the syringe to receive the fiber fabric, and the fiber fabric is immersed in low-temperature water at 15°C for cleaning, and then sent to a 120°C environment for heat treatment for 1 hour, and then the temperature is increased to 160°C for treatment for 0.5 hours to obtain a finished fiber fabric.

[0085] Control group 1: The timing of adding modified silica and modified titanium dioxide was changed to after the polyvinyl pyrrolidone and polyacrylonitrile were mixed, and other conditions remained unchanged to prepare the fiber fabric;

[0086] Control group 2: Polyacrylonitrile was removed and only polyvinyl pyrrolidone was used as the matrix, with other conditions remaining unchanged to prepare the fiber fabric;

[0087] Control group 3: Polyvinyl pyrrolidone was removed and only polyacrylonitrile was used as the matrix. Other conditions remained unchanged to prepare the fiber fabric.

[0088] Control group 4: The solvent for dissolving polyvinyl pyrrolidone was replaced with dimethylformamide, and other conditions remained unchanged to prepare the fiber fabric;

[0089] Control group 5: After the spinning solution was prepared, a uniform electric field was used for spinning, and other conditions remained unchanged to prepare the fiber fabric.

[0090] Example 2: Please refer to Figure 2 and Figure 3 , a method for preparing a high-strength and wear-resistant nanocomposite fiber fabric, wherein S1 is specifically:

[0091] S11: After drying silica in a vacuum environment at 105°C for 6 hours, a mixed solvent of ethanol and acetic acid in a volume ratio of 4:1 was added, and ultrasonic treatment was performed for 10 minutes to obtain a mixed solution A. After drying titanium dioxide in an environment at 120°C for 4 hours, a dilute nitric acid solution with a pH of 3 was added, and ultrasonic treatment was performed for 30 minutes to obtain a mixed solution B.

[0092] S12: adding ethanol solution and acetic acid solution to the silane coupling agent in sequence, adjusting the pH to 5, stirring and hydrolyzing at room temperature for 30 minutes, and then adding to the mixed solution A, reacting at a constant temperature of 60°C at a stirring rate of 400 rpm for 6 hours, centrifuging at a speed of 8000 rpm for 10 minutes, washing with ethanol and deionized water three times in sequence, and drying in a vacuum environment at 60°C for 12 hours to obtain modified silica;

[0093] S13: Aluminum sulfate solution was added to the mixed solution B, the temperature was controlled at 70°C, ammonia water was added dropwise until the pH was 7, the product was added to a centrifuge, and centrifuged at 10,000 rpm for 15 minutes. The product was rinsed with deionized water until neutral to obtain modified titanium dioxide, and the prepared modified titanium dioxide was stored in 95% ethanol at 5°C;

[0094] Furthermore, by increasing the drying temperature and extending the drying time of silica and titanium dioxide, the adsorbed water in silica and titanium dioxide is more thoroughly removed, the silane coupling agent is hydrolyzed at room temperature to form a silane hydrolyzate to form silanol, and then the temperature is increased to 60°C for grafting reaction, silanol condenses with the hydroxyl group on the surface of silica to form a covalent bond, a dense Si-O-Si network is constructed on the surface of silica, shrinkage groups are introduced into the particle surface, the surface energy of silica is reduced, the compatibility of silica in dimethylformamide is enhanced, and the agglomeration of silica caused by direct addition is avoided. When modifying titanium dioxide, aluminum ions are present on the surface of titanium dioxide. The surface is hydrolyzed to generate an alternating layer of aluminum hydroxide, which is converted into an alumina coating after drying, shielding the photocatalytic activity of titanium dioxide and preventing ultraviolet degradation of polymer chains. At the same time, it neutralizes the surface acid sites that appear after nitric acid treatment and reduces the charge repulsion between titanium dioxide and polyvinylpyrrolidone amide groups. The alumina coating on the surface of the modified titanium dioxide can avoid dissolution after the addition of polyacrylonitrile. The hydrophobicity of the modified silicon dioxide is compatible with dimethylformamide, avoiding precipitation in a mixed solution of deionized water and dimethylformamide. At the same time, the addition of modified titanium dioxide can improve the storage stability of the spinning solution and extend the storage time of the spinning solution.

[0095] Example 3: Please refer to Figure 1 、 Figure 4 and Figure 5 , a preparation method of a high-strength wear-resistant nanocomposite fiber fabric, the preparation method is:

[0096] S1: preparing silicon dioxide and titanium dioxide, drying the silicon dioxide and titanium dioxide, and then modifying them to obtain modified silicon dioxide and modified titanium dioxide;

[0097] S2: Dissolve the pretreated polyvinylpyrrolidone in a mixed solution of deionized water and dimethylformamide in a volume ratio of 7:3, and stir magnetically at a constant temperature of 50°C for 6 h;

[0098] S3: adding modified silicon dioxide and modified titanium dioxide to the polyvinyl pyrrolidone solution and performing ultrasonic dispersion treatment to obtain a premixed solution;

[0099] S4: dissolving polyacrylonitrile in dimethylformamide and adding it dropwise to the premixed solution, and completing the spinning solution preparation through stirring and ultrasonic treatment;

[0100] S5: adding the spinning solution into the syringe after pretreatment, and preparing the fiber fabric by electrospinning;

[0101] The S3 is specifically:

[0102] S31: Add 0.5% anionic dispersant to the polyvinyl pyrrolidone solution and stir at 800 rpm in a constant temperature environment of 50°C for 10 minutes;

[0103] S32: Modified titanium dioxide stored in ethanol was slowly injected at a flow rate of 0.5 mL / min using a constant flow pump, and the mixture was kept in a water bath at 45°C. The mixture was sheared at 8000 rpm for 15 min using a high-speed homogenizer, and then ultrasonicated at 40 kHz for 20 min to obtain a mixed system A.

[0104] S33: lowering the temperature of the mixed system A to 35° C., adding ethanol so that the ethanol content in the mixed system A is 70%, and adding the modified silica pre-dispersed in ethanol dropwise to the mixed system A at a rate of 1 mL / min;

[0105] S34: mechanically stirring at 300 rpm for 20 min, followed by ultrasonic stirring at 40 kHz for 30 min to obtain a premixed solution;

[0106] The S4 is specifically:

[0107] S41: lowering the temperature of the premixed solution to 40°C, and adding dimethylformamide to make the dimethylformamide content in the premixed solution 60%;

[0108] S42: The polyacrylonitrile powder was dried in a vacuum environment at 80°C for 4 h, and then the polyacrylonitrile powder was sprinkled into a 10°C dimethylformamide solution at a rate of 5 g / min and stirred at 200 rpm for 20 min to form a 10% suspension;

[0109] S43: adding the suspension to the treated premixed solution at a rate of 1 mL / min, and performing ultrasonic treatment at 40 kHz while stirring at 400 rpm in an environment of 25°C;

[0110] S44: Raise the temperature to 50°C and continue stirring for 2 h until the polyacrylonitrile is completely dissolved;

[0111] S45: raising the temperature to 65° C. and stirring at 5000 rpm for 10 min to obtain a spinning solution;

[0112] The anionic dispersant added in S31 is sodium lauryl sulfate;

[0113] Furthermore, by selecting silica and titanium dioxide as nanofillers, after modifying silica and titanium dioxide, sodium dodecyl sulfate with a concentration of 5% was added to the polyvinyl pyrrolidone solution as a dispersant to establish an electrostatic repulsion barrier, preferentially occupy the active sites of polyvinyl pyrrolidone, and reserve binding sites for the nanofillers. Subsequently, the modified titanium dioxide stored in ethanol was slowly injected at a flow rate of 0.5 mL / min, and the local concentration gradient of the modified titanium dioxide was reduced by a 45°C water bath and 8000 rpm high-speed shearing. The embedding of the polyvinyl pyrrolidone molecular chain was promoted by shearing. Subsequently, the temperature was lowered to reduce the molecular chain movement rate to avoid flocculation. After the addition of ethanol, the modified titanium dioxide was melted by 70% of the solution. The high ethanol environment weakens the hydrophilicity of polyvinyl pyrrolidone, thereby adapting to modified silica, while avoiding the competitive adsorption formed by the simultaneous addition of modified titanium dioxide and modified silica to form interface defects. Subsequently, polyacrylonitrile is dissolved in dimethylformamide and added dropwise to the premixed liquid at 1 mL / min. After three stages of heating treatment, a spinning solution is obtained. By using polyvinyl pyrrolidone and polyacrylonitrile as the matrix, the pyrrolidone group and the cyano group form cross-links, which improves the interfacial compatibility and inhibits phase separation. By occupying the cyano reaction sites of polyacrylonitrile by polyvinyl pyrrolidone, the aging of the finished fiber fabric is delayed, and the intermolecular cross-linking of polyacrylonitrile is blocked by polyvinyl pyrrolidone, thereby promoting intramolecular stability.

[0114] Example 4: Please refer to Figure 1 A method for preparing the high-strength wear-resistant nanocomposite fiber fabric is provided, wherein the preparation method comprises:

[0115] S1: preparing silicon dioxide and titanium dioxide, drying the silicon dioxide and titanium dioxide, and then modifying them to obtain modified silicon dioxide and modified titanium dioxide;

[0116] S2: Dissolve the pretreated polyvinylpyrrolidone in a mixed solution of deionized water and dimethylformamide in a volume ratio of 7:3, and stir magnetically at a constant temperature of 50°C for 6 h;

[0117] S3: adding modified silicon dioxide and modified titanium dioxide to the polyvinyl pyrrolidone solution and performing ultrasonic dispersion treatment to obtain a premixed solution;

[0118] S4: dissolving polyacrylonitrile in dimethylformamide and adding it dropwise to the premixed solution, and completing the spinning solution preparation through stirring and ultrasonic treatment;

[0119] S5: adding the spinning solution into the syringe after pretreatment, and preparing the fiber fabric by electrospinning;

[0120] The concentration of the polyvinyl pyrrolidone solution in S2 is 10%, and the magnetic stirring is carried out at a speed of 200 rpm for 2 hours, and then the speed is increased to 400 rpm and stirring is continued for 4 hours;

[0121] Furthermore, when dissolving polyvinyl pyrrolidone, a mixed solution of deionized water and dimethylformamide with a volume ratio of 7:3 is selected as the solvent. The polyvinyl pyrrolidone molecular chain contains amide groups, which are easy to form intermolecular or intramolecular hydrogen bond networks. After adding deionized water, the hydrogen bonds of polyvinyl pyrrolidone itself are broken by strong hydrogen bond competition. The carbonyl group and dimethylamino group of dimethylformamide further form dipole-dipole interactions in the pyrrolidone ring of polyvinyl pyrrolidone, promote the disentanglement of the molecular chain, and improve the dissolution efficiency of polyvinyl pyrrolidone. Water molecules form a primary solvation layer in the hydrophilic region of polyvinyl pyrrolidone, weakening the The interaction force between polymer chains allows dimethylformamide to penetrate into the hydrophobic area of ​​polyvinylpyrrolidone, disperse the hydrophobic chain segments through van der Waals forces, and form a secondary solvation layer. A mixed solution of deionized water and dimethylformamide with a volume ratio of 7:3 is used as a solvent, which reduces the amount of dimethylformamide used, avoids the use of large amounts of organic solvents to pollute the environment and increase the difficulty of processing the production products. At the same time, the concentration of the polyvinylpyrrolidone solution after dissolving polyvinylpyrrolidone is reduced by a mixed solution of deionized water and dimethylformamide, avoiding blockage during the electrospinning process, improving spinning continuity, and making the fiber diameter distribution more uniform.

[0122] Example 5: Please refer to Figure 6 , a method for preparing a high-strength wear-resistant nanocomposite fiber fabric, wherein S5 is specifically:

[0123] S51: The spinning solution was pretreated by ultrasonic oscillation for 20 min, and then injected into a syringe. The syringe pushed the spinning solution into an electric field with an initial voltage of 18 kV and an ambient humidity of 30% at a rate of 0.3 mL / h.

[0124] S52: Increase the electric field voltage to 25 kV at a rate of 1 kV / 5 min;

[0125] S53: Setting a roller with a rotation speed of 2000 rpm to receive the fiber fabric at a distance of 15 cm from the syringe;

[0126] S54: Immersing the fiber fabric in low-temperature water at 15° C. for cleaning, and then placing it in a 120° C. environment for heat treatment for 1 hour, and then raising the temperature to 160° C. for heat treatment for 0.5 hour to obtain a finished fiber fabric;

[0127] Furthermore, the solvent used to dissolve polyvinyl pyrrolidone is a mixed solution of deionized water and dimethylformamide in a volume ratio of 7:3, which contains water molecules. When the prepared spinning solution is subjected to electrospinning, the electric field voltage intensity needs to be strictly controlled to avoid instability of the spinning solution jet caused by water molecules. After removing bubbles in the spinning solution by ultrasonic oscillation, the spinning solution is injected into the syringe and pushed into an electric field with an ambient humidity of 30% and an initial voltage intensity of 18kV at a rate of 0.3mL / h, so that the spinning solution forms a stable Taylor cone to avoid jet sputtering. The rate of n increases the voltage intensity of the electric field to 25kV, reduces the coefficient of variation of the fiber diameter, and makes the diameter of the formed fiber more stable and consistent. In addition, by reducing the humidity of the electric field to 30%, the focusing effect of the electric field on the jet is enhanced through the low-humidity environment, which accelerates the gradient volatilization of the solvent and inhibits the formation of liquid droplets. After the roller completes the collection of the fiber fabric with a shortened collection distance, the residual charge on the fiber fabric is removed by low-temperature water washing to avoid adsorption between the fiber fabrics due to static electricity. Subsequently, the molecular chain orientation of the fiber fabric is reorganized through gradient heat treatment to avoid excessive stretching of the molecular chain caused by the high electric field, thereby improving the quality of the finished fiber fabric.

[0128] Performance Testing

[0129] Test 1: 10 pieces of fiber fabrics prepared in Example 1 and Control Groups 1-5 were prepared, each with a size of 40 cm*40 cm. The selected sample fiber fabrics were tested according to GB / T21196.1-2007 "Determination of the Abrasion Resistance of Textiles by the Martindale Method Part 1: Martindale Abrasion Tester". The test results are shown in Table 1:

[0130] Table 1 Fiber fabric wear resistance test results

[0131] Wear-resistant revolutions (r) Example 1 42500 Control group 1 31800 Control group 2 18600 Control group 3 12400 Control group 4 26300 Control group 5 29700

[0132] From the test results in Table 1, it can be seen that the wear resistance of the fiber fabric prepared in Example 1 is significantly better than that of the control groups 1-5. By comparing Example 1 with the control group 1, it can be seen that Example 1 avoids competitive adsorption between nanoparticles and reduces stress concentration caused by agglomeration by sequentially adding modified titanium dioxide and modified silicon dioxide to the polyvinyl pyrrolidone solution and then adding polyacrylonitrile dissolved in dimethylformamide. By comparing Example 1 with the control groups 2 and 3, it can be seen that the composite matrix system using polyvinyl pyrrolidone and polyacrylonitrile can compensate for the rigidity of polyacrylonitrile through the flexibility of polyvinyl pyrrolidone. By comparing Example 1 with the control group 4, it can be seen that using only dimethylformamide as a solvent will cause polyvinyl pyrrolidone to shrink excessively, thereby weakening the interfacial binding force of the nanoparticles. By comparing Example 1 with the control group 5, it can be seen that a uniform electric field will cause jet whipping, resulting in disordered fiber arrangement.

[0133] Test 2: 10 pieces of fiber fabrics prepared in Example 1 and Control Groups 1-5 were prepared, each with a size of 40 cm*40 cm. The tensile properties of the fiber fabric samples were tested according to the test method in GB / T3923.1-1997 "Textiles - Determination of Breaking Strength and Elongation at Break - Strip Method". The test results are shown in Table 2:

[0134] Table 2 Fiber fabric tensile properties test results

[0135] Breaking strength (N) Elongation at break (%) Example 1 86.1 28.7 Control group 1 71.6 22.5 Control group 2 49.2 35.1 Control group 3 63.4 12.8 Control group 4 69.5 21.7 Control group 5 76.1 26.8

[0136] From the test results in Table 2, it can be seen that the tensile properties of the fiber fabric prepared in Example 1 are better than those of the fiber fabrics prepared in control groups 1-5. By comparing Example 1 with Control Group 1, it can be seen that the post-addition of nanoparticles will cause agglomeration, induce stress concentration, and thus cause early fracture. By comparing Example 1 with Control Groups 2 and 3, it can be seen that when only polyvinyl pyrrolidone is used as the matrix, the lack of polyacrylonitrile leads to molecular chain slippage. Although the elongation at break is increased, the breaking strength drops sharply. When only polyacrylonitrile is used, the lack of polyvinyl pyrrolidone leads to the brittleness of the finished fiber fabric, and the alumina coating layer of the modified silica is not fully combined with the polyacrylonitrile. By comparing Example 1 with Control Group 3, it can be seen that when only dimethylformamide is used as the solvent, the polyvinyl pyrrolidone will shrink, reducing the wrapping rate of the nanoparticles. By comparing Example 1 with Control Group 5, it can be seen that spinning by gradient electric field optimizes the fiber orientation and avoids the situation of uneven load distribution.

[0137] Working principle: Prepare sufficient amounts of polyvinyl pyrrolidone, titanium dioxide, silicon dioxide and polyacrylonitrile in a mass ratio of 1:0.8:5:10, dry the polyvinyl pyrrolidone in a vacuum environment at 40°C for 24 hours, dry the titanium dioxide in a 120°C environment for 4 hours, dry the silicon dioxide in a vacuum environment at 105°C for 6 hours, and dry the polyacrylonitrile in a vacuum environment at 80°C for 4 hours. Add a mixed solvent of ethanol and acetic acid in a volume ratio of 4:1 with a weight that is 3 times the mass of silicon dioxide to the silicon dioxide, ultrasonically treat it at 28kHz for 5 minutes and then ultrasonically treat it at 40kHz for 5 minutes to obtain a mixed solution A. Add ethanol solution and acetic acid solution to the silane coupling agent to adjust the pH to 4.5-5.5, and stir and hydrolyze it at room temperature for 30 minutes before adding it to the mixed solution A. The silane coupling agent The mass ratio of the cross-linking agent hydrolyzate to the mixed solution A is 1:30, and then the mixture is stirred at 400 rpm in a constant temperature environment at 60°C for 6 hours. After the reaction is completed, it is separated by high-speed centrifugation at 8000 rpm for 10 minutes. After washing with ethanol and deionized water three times in sequence, it is dried in a vacuum environment at 60°C for 12 hours to obtain modified silica. A dilute nitric acid solution with a pH of 3 is added to the titanium dioxide, and ultrasonic treatment is performed for 30 minutes to obtain a mixed solution B. A 3% aluminum sulfate solution is added to the mixed solution B, the temperature is controlled at 70°C, and ammonia water is added dropwise to pH = 7-8. The product is added to a centrifuge and centrifuged at 10000 rpm for 15 minutes. It is rinsed with deionized water until neutral to obtain modified titanium dioxide, and the prepared modified titanium dioxide is stored in 95% ethanol at a temperature of 2°C to 8°C.

[0138] The pretreated polyvinyl pyrrolidone was dissolved in a mixed solution of deionized water and dimethylformamide in a volume ratio of 7:3, and magnetically stirred at 200 rpm in a constant temperature environment of 50°C to 60°C for 1 hour to 2 hours, and then the speed was increased to 300 rpm to 400 rpm and stirring was continued for 4 hours to 5 hours to obtain a polyvinyl pyrrolidone solution with a concentration of 6% to 10%;

[0139] Sodium lauryl sulfate with a concentration of 0.5% was added to the polyvinyl pyrrolidone solution, and the mixture was stirred at a constant temperature of 50°C for 10 minutes at a speed of 800 rpm. The modified titanium dioxide stored in ethanol was slowly injected through a constant flow pump at a flow rate of 0.5 mL / min, and the temperature was maintained at 45°C to 50°C for a water bath. The mixture was sheared at a speed of 8000 rpm for 15 minutes by a high-speed homogenizer, and then ultrasonically treated at 40 kHz for 20 minutes to obtain a mixed system A. The temperature of the mixed system A was lowered to 35°C to 40°C, and ethanol was added to make the ethanol content in the mixed system A 70%. The modified silica pre-dispersed in ethanol was added dropwise to the mixed system A at a rate of 1 mL / min, and mechanically stirred at a speed of 300 rpm for 20 minutes, and then ultrasonically stirred at 40 kHz for 30 minutes to obtain a premixed solution.

[0140] The temperature of the premixed solution was lowered to 40°C to 45°C, dimethylformamide was added to make the dimethylformamide content in the premixed solution 60%, the polyacrylonitrile powder was dried in a vacuum environment at 80°C for 4 hours, and then the polyacrylonitrile powder was sprinkled into a 10°C dimethylformamide solution at a rate of 5 g / min, and stirred at a speed of 200 rpm for 20 minutes to form a 10% suspension, and the suspension was added dropwise to the treated premixed solution at a rate of 1 mL / min, and ultrasonic treatment was performed at 40 kHz while stirring at 400 rpm in an environment of 25°C to 30°C. The temperature was gradually increased to 50°C and 65°C, and a spinning solution was obtained after stirring. The spinning solution was pretreated by ultrasonic oscillation for 20 minutes, and then the spinning solution was injected into a syringe. The syringe pushed the spinning solution into an electric field with an ambient humidity of 30% and an initial voltage of 18kV at a speed of 0.2mL / h~0.5mL / , and the electric field voltage was increased to 20kV~25kV at a rate of 1kV / 5min. A roller with a rotation speed of 2000rpm was set at 12cm~18cm away from the syringe to receive the fiber fabric. The fiber fabric was immersed in low-temperature water of 5℃~40℃ for cleaning, and then sent to a 120℃ environment for heat treatment for 1h, and then the temperature was increased to 160℃ for treatment for 0.5h to obtain a finished fiber fabric.

[0141] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above and that the invention can be embodied in other specific forms without departing from the spirit or essential characteristics of the invention. Therefore, the embodiments should be considered in all respects as illustrative and non-restrictive, and the scope of the invention is defined by the appended claims, not the foregoing description, and all variations within the meaning and range of equivalents of the claims are intended to be included therein. Any reference sign in a claim should not be construed as limiting the claim to which it relates.

Claims

1. A method for preparing a high-strength, wear-resistant nanocomposite fiber fabric, characterized by: The preparation method is: S1: preparing silicon dioxide and titanium dioxide, drying the silicon dioxide and titanium dioxide, and then modifying them to obtain modified silicon dioxide and modified titanium dioxide; S2: Dissolve the pretreated polyvinyl pyrrolidone in a mixed solution of deionized water and dimethylformamide in a volume ratio of 7:3, and stir magnetically in a constant temperature environment of 50℃ to 60℃ for 6h; S3: adding modified silicon dioxide and modified titanium dioxide to the polyvinyl pyrrolidone solution and performing ultrasonic dispersion treatment to obtain a premixed solution; S4: dissolving polyacrylonitrile in dimethylformamide and adding it dropwise to the premixed solution, and completing the spinning solution preparation through stirring and ultrasonic treatment; S5: The spinning solution is pretreated and added to the syringe, and the fiber fabric is prepared by electrospinning.

2. The method for preparing a high-strength wear-resistant nanocomposite fiber fabric according to claim 1, characterized in that: The S1 is specifically: S11: After drying silica in a vacuum environment at 105°C for 6 hours, a mixed solvent of ethanol and acetic acid in a volume ratio of 4:1 was added, and ultrasonic treatment was performed for 10 minutes to obtain a mixed solution A. After drying titanium dioxide in an environment at 120°C for 4 hours, a dilute nitric acid solution with a pH of 3 was added, and ultrasonic treatment was performed for 30 minutes to obtain a mixed solution B. S12: adding ethanol solution and acetic acid solution to the silane coupling agent in sequence, adjusting the pH to 4.5-5.5, stirring and hydrolyzing at room temperature for 30 minutes, and then adding to the mixed solution A, reacting at a stirring rate of 300 rpm-500 rpm in a constant temperature environment of 60°C for 6 hours, centrifuging at a speed of 8000 rpm for 10 minutes, washing with ethanol and deionized water three times in sequence, and drying in a vacuum environment at 60°C for 12 hours to obtain modified silica; S13: Add aluminum sulfate solution to the mixed solution B, control the temperature at 70°C, add ammonia water dropwise until the pH is 7-8, add the product to a centrifuge, centrifuge at 10,000 rpm for 15 minutes, rinse with deionized water until neutral to obtain modified titanium dioxide, and store the prepared modified titanium dioxide in 95% ethanol at a temperature of 2°C to 8°C.

3. The method for preparing a high-strength wear-resistant nanocomposite fiber fabric according to claim 1, characterized in that: The concentration of the polyvinyl pyrrolidone solution in S2 is 6% to 10%, and the magnetic stirring is carried out at a speed of 200 rpm for 1 to 2 hours, and then the speed is increased to 300 rpm to 400 rpm and stirring is continued for 4 to 5 hours.

4. The method for preparing a high-strength wear-resistant nanocomposite fiber fabric according to claim 1, characterized in that: The S3 is specifically: S31: Add 0.5% anionic dispersant to the polyvinyl pyrrolidone solution and stir at 800 rpm in a constant temperature environment of 50°C for 10 minutes; S32: Modified titanium dioxide stored in ethanol was slowly injected at a flow rate of 0.5 mL / min using a constant flow pump, and the mixture was kept in a water bath at a temperature of 45°C to 50°C. The mixture was sheared at 8000 rpm for 15 min using a high-speed homogenizer, and then ultrasonicated at 40 kHz for 20 min to obtain a mixed system A. S33: Lowering the temperature of the mixed system A to 35°C to 40°C, adding ethanol so that the ethanol content in the mixed system A is 70%, and adding the modified silica pre-dispersed in ethanol dropwise to the mixed system A at a rate of 1 mL / min; S34: Mechanically stirring at 300 rpm for 20 min, followed by ultrasonic stirring at 40 kHz for 30 min to obtain a premixed solution.

5. The method for preparing a high-strength wear-resistant nanocomposite fiber fabric according to claim 1, characterized in that: The S4 is specifically: S41: lowering the temperature of the premixed solution to 40°C to 45°C, and adding dimethylformamide to adjust the dimethylformamide content in the premixed solution to 60%; S42: The polyacrylonitrile powder was dried in a vacuum environment at 80°C for 4 h, and then the polyacrylonitrile powder was sprinkled into a 10°C dimethylformamide solution at a rate of 5 g / min and stirred at 200 rpm for 20 min to form a 10% suspension; S43: adding the suspension to the treated premixed solution at a rate of 1 mL / min, and performing ultrasonic treatment at 40 kHz while stirring at 400 rpm in an environment of 25°C to 30°C; S44: Raise the temperature to 50°C and continue stirring for 2 h until the polyacrylonitrile is completely dissolved; S45: The temperature was raised to 65° C. and the mixture was stirred at 5000 rpm for 10 min to obtain a spinning solution.

6. The method for preparing a high-strength wear-resistant nanocomposite fiber fabric according to claim 1, characterized in that: The S5 is specifically: S51: The spinning solution was pretreated by ultrasonic oscillation for 20 min, and then the spinning solution was injected into a syringe. The syringe pushed the spinning solution into an electric field with an initial voltage of 18 kV and an ambient humidity of 30% at a rate of 0.2 mL / h to 0.5 mL / h; S52: Increase the electric field voltage to 20 kV to 25 kV at a rate of 1 kV / 5 min; S53: Setting a roller with a rotation speed of 2000 rpm to receive the fiber fabric at a distance of 12 cm to 18 cm from the syringe; S54: The fiber fabric is immersed in low-temperature water at 5° C. to 40° C. for cleaning, and then placed in a 120° C. environment for heat treatment for 1 hour, and then the temperature is raised to 160° C. for heat treatment for 0.5 hour to obtain a finished fiber fabric.

7. The method for preparing a high-strength wear-resistant nanocomposite fiber fabric according to claim 1, characterized in that: The mass ratio of the polyvinyl pyrrolidone, titanium dioxide, silicon dioxide and polyacrylonitrile is 1:0.8:5:10-15.

8. The method for preparing a high-strength wear-resistant nanocomposite fiber fabric according to claim 2, characterized in that: The concentration of the aluminum sulfate solution added in S13 is 3%.

9. The method for preparing a high-strength wear-resistant nanocomposite fiber fabric according to claim 4, characterized in that: The anionic dispersant added in S31 is sodium lauryl sulfate.

10. A high-strength, wear-resistant nanocomposite fiber fabric, suitable for the method for preparing a high-strength, wear-resistant nanocomposite fiber fabric according to any one of claims 1 to 9, characterized in that: The nanocomposite fiber fabric is prepared by the preparation method.

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