Double nanocomposite gel coating stab-proof composite fabric and preparation method thereof

Abstract

The present invention discloses a double-nano composite gel coating stab-proof composite fabric and a preparation method thereof. The preparation method comprises the following steps: dissolving polyether F127 diacrylate in a solvent, magnetically stirring for 24 hours, then adding nano titanium nitride (TiN) under stirring conditions, dissolving and ultrasonicating for 4 hours, then bubbling with nitrogen for 15 minutes, adding monomers, catalysts, and initiators to the solution, polymerizing at room temperature for 24 hours to obtain a double-nano composite hydrogel, and fully coating the double-nano composite hydrogel on a stab-proof fabric having a certain stab-proof function. The double-nano composite hydrogel is then allowed to stand in a sealed environment for polymerization for 24 hours to obtain a double-nano composite gel coating stab-proof composite fabric. When the coated stab-proof fabric formed by combining the double-nano composite hydrogel with the fiber fabric is damaged, the damage to the fiber cannot be restored. However, due to the excellent light-to-heat conversion performance of the nano titanium nitride, the hydrogel at the fabric coating effectively repairs the damaged parts of the double-nano composite gel coating stab-proof composite fabric. Therefore, the double-nano composite gel coating stab-proof composite fabric still has a certain stab-proof effect after self-healing.

Description

Technical Field

[0001] The invention belongs to the technical field of textile fabrics, and in particular relates to a double-nano composite gel coating stab-proof composite fabric and a preparation method thereof. Background Art

[0002] With technological advancements and rising demand for stab-resistant products, flexible stab-resistant products have captured a significant portion of the market thanks to their superior stab resistance, flexibility, and concealment. However, stab-resistant fabrics often face a challenge: their inability to self-repair after damage, leading to a decline in their use. Therefore, the development of superior, self-repairing stab-resistant fabrics is a pressing need in the market.

[0003] Thermally triggered self-repairing fabrics can repair wounds under thermal stimulation, but thermal initiation can only trigger repairs over a short distance, and it is difficult to achieve targeted repairs during the thermally triggered repair process, which results in a large amount of heat energy being wasted. In addition, high temperatures will accelerate the aging of fabrics, and damaged fabrics need to be heated as a whole during the repair process, which will accelerate the aging of the undamaged parts and reduce the service life of the fabric. Compared with thermally triggered self-repairing fabrics, light-triggered self-repairing coating fabrics have the characteristics of spatial controllability and remote excitation. By utilizing this characteristic of light-triggered self-repairing coating fabrics, flexible stab-resistant fabrics can be remotely repaired after being damaged. In addition, light-triggered self-repairing coating fabrics have high sensitivity and can achieve instantaneous stopping and starting of the light-triggered self-repair process by controlling the light source. Therefore, it is very necessary to design and manufacture flexible stab-resistant fabrics with excellent self-healing efficiency and mechanical strength, which can be remotely excited and can be repaired at a targeted point. Summary of the Invention

[0004] In view of the shortcomings of the existing technology, the purpose of the present invention is to provide a method for preparing a double-nano composite gel coating stab-proof composite fabric.

[0005] Another object of the present invention is to provide a double-nano composite gel coating stab-proof composite fabric obtained by the above preparation method.

[0006] The purpose of the present invention is successfully achieved through the following technical solutions.

[0007] A method for preparing a double-nano composite gel coating stab-proof composite fabric comprises the following steps:

[0008] 1) Adding polyether F127 to anhydrous dichloromethane under nitrogen atmosphere to fully dissolve the polyether, then adding triethylamine and acryloyl chloride while stirring, filtering out the precipitate, and subjecting the filtrate to two cycles of precipitation in excess ether to obtain a white precipitate, which is filtered again and dried under vacuum at room temperature to obtain polyether F127 diacrylate. The ratio of anhydrous dichloromethane, polyether F127, triethylamine, and acryloyl chloride, by mass, is (90-160):(4-16):(0.1-0.6):(0.1-0.6);

[0009] In the step 1), the stirring temperature is 12 to 48° C., and the stirring time is 10 to 50 hours.

[0010] In the step 1), the ether is methyl tert-butyl ether.

[0011] In the step 1), the step of adding excess ether for precipitation each time is as follows: adding the filtrate into excess ether, filtering, and obtaining a precipitate.

[0012] In the step 1), the vacuum drying time is at least 12 hours.

[0013] In the step 1), the ratio of the ether to the polyether F127 is at least 1600:1 in parts by mass.

[0014] 2) The polyether F127 diacrylate and nano-TiN obtained in step 1) were dissolved in water and ultrasonicated for at least 4 hours, and then nitrogen was bubbled for at least 15 minutes. The monomer was added to the solution, and the mixture was stirred again for at least 15 minutes. The temperature was adjusted to 0-10° C., and a catalyst and an initiator were added. The mixture was polymerized at room temperature for 12-24 hours to obtain a double-nano composite hydrogel, which was then dried to obtain a gel sample. The solvent is water, the monomer is a mixture of TiO2 colloid, 2-methoxyacrylate (MEA) and N,N-dimethylacrylamide (DMAA), the initiator is potassium persulfate (KPS), the catalyst is tetramethylethylenediamine (TEMED), and the ratio of the mass fraction of the polyether F127 diacrylate, the mass fraction of the solvent, the mass fraction of nano-TiN, the volume fraction of the monomer, the mass fraction of the initiator and the volume fraction of the catalyst is (0.1-0.7):(2-10):(0.1-0.8):(2.0-8.0):(0.01-0.05):(0.01-0.05);

[0015] In the step 2), the stirring is magnetic stirring.

[0016] In the step 2), the molar ratio of 2-methoxyacrylate to N,N-dimethylacrylamide in the monomer is 1:1.

[0017] In the step 2), the concentration of N,N-dimethylacrylamide in the monomer is 2 to 8 mol / L.

[0018] In the step 2), the concentration of the initiator potassium persulfate is 2 to 6 mol / L.

[0019] In the step 2), the nitrogen is introduced for 10 to 60 minutes.

[0020] In the step 2), the unit of the mass fraction is g, and the unit of the volume fraction is mL.

[0021] 3) The double-nano composite hydrogel is fully coated on a fiber fabric with stab-resistant performance, and the double-nano composite hydrogel is allowed to polymerize in a sealed environment for at least 24 hours to obtain a double-nano composite gel-coated stab-resistant composite fabric.

[0022] In step 3), the stab-proof fabric is laid flat in a mold, the double-nano composite hydrogel is placed on the stab-proof fabric, and the double-nano composite hydrogel on the stab-proof fabric is evenly scraped with a scraper to ensure that the double-nano composite hydrogel is fully and evenly coated on the surface of the stab-proof fabric.

[0023] In step 3), the stab-proof fabric includes high-performance fibers with high modulus such as aramid, polyimide, ultra-high molecular weight polyethylene, poly(p-phenylene benzobisoxazole) fiber, high-strength polyester, and various woven fabrics, knitted fabrics, three-dimensional weaving, non-woven fabrics, and flat fabrics.

[0024] In the step 3), the volume fraction of the double-nano composite hydrogel in the double-nano composite gel coating stab-proof composite fabric is 20-70%.

[0025] In the step 3), the polymerization process is: first maintaining at 40-80° C. for 2-4 hours in a sealed environment, and then maintaining at 20-30° C. for 12-36 hours.

[0026] The double-nano composite gel coating stab-proof composite fabric obtained by the above preparation method.

[0027] Compared with the prior art, the present invention has the following beneficial effects:

[0028] (1) A technical method combining double nanocomposite hydrogel with high-strength fabric was adopted to fully coat the prepared nanocomposite hydrogel with high toughness and excellent photothermal self-repairing function on the high-strength and high-modulus stab-proof fabric. The excellent interface effect between the double nanocomposite hydrogel and the fabric surface gave the two a strong synergistic toughening effect, and a double nanocomposite gel-coated stab-proof composite fabric with excellent photothermal self-repairing stab-proof effect was successfully manufactured.

[0029] (2) The volume ratio of the double nanocomposite hydrogel in the double nanocomposite gel coating stab-proof composite fabric enables the double nanocomposite gel coating stab-proof composite fabric to have excellent stab-proof performance while maintaining relatively optimal comfort. This is because too little double nanocomposite hydrogel will lead to poor bonding between the fiber surface and the double nanocomposite hydrogel, and too much double nanocomposite hydrogel will lead to a decrease in the proportion of high-strength stab-proof fabric fiber reinforcement in the double nanocomposite gel coating stab-proof composite fabric, making it impossible to play the role of its high-performance fiber.

[0030] (3) Because the double-nano composite gel coating has excellent photothermal conversion efficiency, when the coating is damaged, the double-nano composite hydrogel promotes the damaged part to spontaneously repair itself through photothermal action, so that the double-nano composite gel coating stab-proof composite fabric has excellent self-healing and stab-proof properties even after being damaged by cone punctures and knife punctures.

[0031] After the coated stab-proof fabric formed by the combination of double-nano composite hydrogel and fabric is damaged, the damage to the fibers cannot be restored. However, due to the excellent photothermal conversion performance of nano-titanium nitride, the hydrogel at the fabric coating can effectively repair the damaged parts of the double-nano composite gel coated stab-proof composite fabric. Therefore, the double-nano composite gel coated stab-proof composite fabric still has a certain stab-proof effect after self-healing. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] Figure 1 The stress-strain results of the double-nanocomposite hydrogel provided in Examples a to d of the present invention are shown;

[0033] Figure 2 This is a graph showing the relationship between the self-repair efficiency of the double-nanocomposite hydrogel provided in Examples a to d of the present invention and the temperature environment and time;

[0034] Figure 3 This is a graph showing the relationship between the self-repair efficiency and time of the double-nano composite hydrogel provided in Examples a to d of the present invention under xenon lamp irradiation;

[0035] Figure 4 This is a graph showing the relationship between the self-repair efficiency and time of the double-nanocomposite hydrogel provided in Examples a to d of the present invention under near-infrared light irradiation;

[0036] Figure 5 This is a graph showing the anti-puncture performance results of Examples 1 to 5 of the present invention;

[0037] Figure 6 This is a graph showing the knife stab resistance performance results of Examples 1 to 5 of the present invention;

[0038] Figure 7 This is a graph showing the relationship between the self-repair efficiency of the double-nano composite gel coating stab-resistant composite fabrics of Examples 2 to 5 of the present invention and the temperature environment and time;

[0039] Figure 8 This is a graph showing the relationship between the self-repair efficiency and time of the double-nano composite gel coating stab-resistant composite fabrics of Examples 2 to 5 of the present invention under xenon lamp irradiation;

[0040] Figure 9 This is a graph showing the relationship between the self-repair efficiency and time of the double-nano composite gel coating stab-resistant composite fabrics of Examples 2 to 5 of the present invention under near-infrared light irradiation; DETAILED DESCRIPTION

[0041] The technical solution of the present invention is further described below with reference to specific embodiments.

[0042] The preparation method of the polyether F127 diacrylate (PF127DA) obtained in step 1) can be adopted from the literature: Bao, Ziting, et al. "Acid-responsive composite hydrogel platform with space-controllable stiffness and calcium supply for enhanced bone regeneration." Chemical Engineering Journal 396 (2020): 125353.

[0043]

[0044]

[0045]

[0046] Performance measurement:

[0047] Quasi-static puncture resistance tests were conducted on stab-resistant composite fabrics coated with double-nanocomposite hydrogels at varying coating weights using a HT-2402 universal strength tester from Taiwan Hongda Instrument Co., Ltd. The cone and knife puncture resistance of the double-nanocomposite hydrogel-coated composite fabrics, both before and after puncture, was tested. The puncture rate was 508 mm / min, and the fabric dimensions were 100 mm x 100 mm. The puncture tips were of two types: cone and knife, with diameters of 4 mm, 2 mm, and 1 mm, respectively. The knife tip used was a P1 blade, as specified in the US NIJ standard 0115.00.

[0048] Dynamic puncture resistance tests were conducted using an NDT-2000J drop hammer impact tester from Taiwan Xinzhi Electronic Automation Co., Ltd. to determine the puncture resistance of double-nanocomposite gel-coated stab-resistant composite fabrics with varying double-nanocomposite hydrogel coating amounts. The double-nanocomposite gel-coated stab-resistant composite fabrics were 100 mm x 100 mm in size. The puncture heads were of two types: a cone-shaped puncture head and a blade-shaped puncture head, with diameters of 4 mm, 2 mm, and 1 mm, respectively. The blades used were P1 blades as specified in the US NIJ standard 0115.00. The puncture heads were loaded with an 8 kg load and released from a height of 0.35 m.

[0049] The self-healing properties of the dual-nanocomposite hydrogel were analyzed and measured using a HT-2402 universal strength tester from Taiwan Hongda Instrument Co., Ltd. The prepared dual-nanocomposite hydrogel was cut into small pieces and then placed together with the fractured surfaces touching. The self-healing process was carried out at 120°C for one hour, under xenon lamp irradiation for 12 hours, or under near-infrared lamp irradiation for one hour.

[0050] Examples a to d

[0051] A method for preparing a double-nano composite hydrogel comprises the following steps:

[0052] 1) In a round-bottom flask filled with nitrogen, polyether F127 was dissolved in anhydrous dichloromethane. The flask temperature was raised to 0-5°C using an ice bath. Triethylamine and acryloyl chloride were then injected into the flask using a syringe and stirred at 25°C for 24 hours. The precipitated triethylammonium chloride salt produced by the reaction of triethylamine and acryloyl chloride was removed by filtration. The filtrate was then precipitated in excess methyl tert-butyl ether for five cycles (each precipitation step comprising: adding excess methyl tert-butyl ether, filtering, and obtaining a precipitate). A white precipitate was obtained, which was vacuum-dried at room temperature of 20-30°C for 24 hours to obtain polyether F127 diacrylate. The ratio of polyether F127, anhydrous dichloromethane, triethylamine, and acryloyl chloride was 10:136.8:0.35:0.39 by mass, and the ratio of methyl tert-butyl ether to polyether F127 was 1600:1 by mass.

[0053] 2) The polyether F127 diacrylate obtained in step 1) was dissolved in a solvent and magnetically stirred for 24 hours. Nano-titanium nitride (TiN) was then added under stirring, dissolved and ultrasonicated for 4 hours. After nitrogen was bubbled for 15 minutes, the monomer was added to the solution and stirred again for at least 15 minutes. The temperature was adjusted to 0-10°C, and a catalyst and initiator were added. The mixture was polymerized at room temperature for 24 hours to obtain a double-nano composite hydrogel. Wherein, the solvent is water, the monomer is a mixture of TiO2 colloid, 2-methoxyacrylate (MEA) and N,N-dimethylacrylamide (DMAA), the initiator is potassium persulfate (KPS), the catalyst is tetramethylethylenediamine (TEMED), the ratio of the mass fraction of polyether F127 diacrylate, the mass fraction of the solvent, the mass fraction of nano-TiN, the volume fraction of the monomer, the mass fraction of the initiator and the volume fraction of the catalyst is 0.36:5:X:3.3:0.029:0.028, the content of TiO2 colloid in the monomer is Y, the concentration of the catalyst tetramethylethylenediamine is 3.675 mol / L, the unit of mass fraction is g, and the unit of volume fraction is mL.

[0054] Example X Y Example a 0 0 Example b 0 6 Example c 6 6 Example d 13 6

[0055] Examples 1 to 5

[0056] A method for preparing a double-nano composite gel coating stab-proof composite fabric comprises the following steps:

[0057] 3) 1) Under a nitrogen atmosphere, polyether F127 was dissolved in anhydrous dichloromethane and placed in a round-bottom flask. The flask temperature was raised to 0-5°C using an ice bath. Triethylamine and acryloyl chloride were then injected into the flask using a syringe and stirred at 25°C for 24 hours. The precipitated triethylammonium chloride salt resulting from the reaction of triethylamine and acryloyl chloride was removed by filtration. The filtrate was then precipitated in excess methyl tert-butyl ether for five cycles (each precipitation step comprising: adding excess methyl tert-butyl ether, filtering, and obtaining a precipitate). A white precipitate was obtained, which was vacuum dried at room temperature of 20-25°C for 24 hours to obtain polyether F127 diacrylate. The ratio of polyether F127, anhydrous dichloromethane, triethylamine, and acryloyl chloride was 10:136.8:0.35:0.39 by mass, and the ratio of methyl tert-butyl ether to polyether F127 was 1600:1 by mass.

[0058] 2) The polyether F127 diacrylate obtained in step 1) was dissolved in a solvent and magnetically stirred for 24 hours. Nano-titanium nitride (TiN) was then added under stirring, dissolved and ultrasonicated for 4 hours. After nitrogen bubbling for 15 minutes, monomers, catalysts and initiators were added to the solution, and polymerization was carried out at room temperature for 24 hours to obtain a double-nano composite hydrogel. Wherein, the solvent is water, the monomer is a mixture of TiO2 colloid, 2-methoxyacrylate (MEA) and N,N-dimethylacrylamide (DMAA), the initiator is potassium persulfate (KPS), the catalyst is tetramethylethylenediamine (TEMED), the ratio of the mass fraction of polyether F127 diacrylate, the mass fraction of the solvent, the mass fraction of nano-TiN, the volume fraction of the monomer, the mass fraction of the initiator and the volume fraction of the catalyst is 0.36:5:X:3.3:0.029:0.028, the content of TiO2 colloid in the monomer is Y, the concentration of tetramethylethylenediamine in the accelerator is 3.675 mol / L, the unit of mass fraction is g, and the unit of volume fraction is mL.

[0059] 3) The double nanocomposite hydrogel is fully coated on the surface of the aramid fabric, and allowed to stand for polymerization for at least 24 hours in a sealed environment at room temperature to obtain a double nanocomposite gel coating stab-proof composite fabric. s =200g / m 2 , the warp / weft density is 60 yarns / 10cm, and the yarn fineness is 1000 denier.

[0060] The aramid fabric is laid flat in a mold, the double-nano composite hydrogel is placed on the aramid fabric, and the double-nano composite hydrogel on the aramid fabric is evenly scraped with a scraper to ensure that the double-nano composite hydrogel is fully and evenly coated on the surface of the aramid fabric.

[0061]

[0062] The self-repair efficiency is equal to the ratio of the critical fracture strength of the double-nanocomposite hydrogel after self-repair to the critical fracture strength of the double-nanocomposite hydrogel before self-repair.

[0063] Depend on Figure 1 It can be seen that with the initial addition of nano-TiO2, the tensile strength and elastic modulus of the gel increase while the tensile length decreases slightly. The tensile properties of the gel with a TiN content of 5% show that the gel has an extremely high tensile strength of 17.01 MPa but a high tensile length of 2268.12%, which indicates that the introduction of TiN has a positive effect on the tensile mechanical properties of the gel.

[0064] Depend on Figure 2It can be seen that high temperature will improve the self-healing efficiency of the double-nanocomposite hydrogel. After healing at a high temperature environment of 120°C for 20 minutes, it has a self-healing efficiency of 96.65% and 96.67% in tensile strength and tensile length, respectively.

[0065] Depend on Figure 3 It can be seen that due to the excellent light-to-heat conversion effect of nano-titanium nitride, the gel can still achieve 100% self-healing efficiency after 12 hours when irradiated with a xenon lamp simulating sunlight of a certain intensity.

[0066] Depend on Figure 4 It can be seen that due to the high light intensity of near-infrared light and the excellent photothermal conversion effect of TiN, the gel at 150°C under near-infrared light exhibits excellent self-healing effect, and its tensile strength self-healing efficiency can reach 81% after 1 minute and 100% after 5 minutes.

[0067] Depend on Figure 5 It can be seen that the best composite fabric P@TiN5MDT5@AF has an extremely high anti-puncture force value of 276.78N, which is 17.27 times that of pure fabric and much higher than 16.13N of pure fabric, which shows that the gel coating plays a strong positive role in the anti-puncture performance of the composite fabric.

[0068] Depend on Figure 6 It can be seen that the gel-coated stab-proof composite fabric has extremely high knife-stab resistance compared to pure fabric. The optimal composite fabric P@TiN5MDT5@AF has an excellent knife-stab resistance value of 241.98N, which is 10.49 times that of pure fabric and much higher than the 23.06N of pure fabric. This shows that the introduction of gel coating can significantly improve the knife-stab resistance value of pure fabric.

[0069] Depend on Figure 7 It can be seen that the self-repair efficiency of the coated stab-proof composite fabric is positively correlated with both temperature and time. After 1 minute at 120°C, the cone puncture force and knife puncture force self-repair efficiencies of the coated stab-proof composite fabric are 19% and 28%, respectively. As time increases, the self-repair performance of the coated stab-proof composite fabric gradually increases. Finally, after 20 minutes, the cone puncture force and knife puncture force self-repair efficiencies of the coated stab-proof composite fabric reach 39% and 52%, respectively. This indicates that the coated stab-proof composite fabric has rapid self-repair performance at 120°C.

[0070] Depend on Figure 8 It can be seen that by simulating sunlight with a xenon lamp, a sunlight intensity of 68°C was applied to the composite fabric, and the surface temperature of the composite fabric was 68°C. As time went on, the cone puncture force and knife puncture force self-repair efficiency of the composite fabric gradually increased, and reached 40% and 49% self-repair efficiency respectively after 12 hours, indicating that long-term sunlight irradiation can significantly improve the self-repair performance of the composite fabric.

[0071] Depend on Figure 9 It can be seen that under 175W near-infrared light and a fixed light distance of 10cm, the surface temperature of the composite fabric reaches 150℃. After only 1 minute of irradiation with near-infrared light, the cone puncture force and knife puncture force self-repair efficiency of the composite fabric reach 32% and 43% respectively. After 5 minutes of irradiation, the cone puncture force and knife puncture force self-repair performance of the composite fabric reach 41% and 54% respectively, which shows that high-intensity near-infrared light can quickly improve the self-repair performance of the composite fabric.

[0072] The above is an exemplary description of the present invention. It should be noted that, without departing from the core of the present invention, any simple deformation, modification or other equivalent replacement that can be made by other skilled in the art without expending creative labor falls within the scope of protection of the present invention.

Claims

1. A method for preparing a double-nano composite gel coating stab-proof composite fabric, characterized in that: The following steps are involved: 1) Add polyether F127 to anhydrous dichloromethane under nitrogen and fully dissolve it. Then, add triethylamine and acryloyl chloride while stirring. Then, filter out the precipitate. The filtrate is precipitated in excess ether for two cycles to obtain a white precipitate. The precipitate is filtered again and dried under vacuum at room temperature to obtain polyether F127 diacrylate. Wherein, the ratio of anhydrous dichloromethane, polyether F127, triethylamine and acryloyl chloride is (90-160): (4-16): (0.1-0.6): (0.1-0.6) by mass; 2) dissolving the polyether F127 diacrylate and nano-TiN obtained in step 1) in a solvent and sonicating for at least 4 hours, then bubbling N2 for at least 15 minutes, adding monomers to the solution, stirring again for at least 15 minutes, adjusting the temperature to 0-10°C, adding a catalyst and an initiator, and polymerizing at room temperature for 12-24 hours to obtain a double-nano composite hydrogel, which was then dried to obtain a gel sample; The solvent is water, the monomer is a mixture of TiO2 colloid, 2-methoxyacrylate MEA and N,N-dimethylacrylamide (DMAA), the initiator is potassium persulfate (KPS), the catalyst is tetramethylethylenediamine (TEMED), the mass ratio of the polyether F127 diacrylate, the mass ratio of the solvent, the mass ratio of nano-TiN, the volume ratio of the monomer, the mass ratio of the initiator and the volume ratio of the catalyst are (0.1-0.7):(2-10):(0.1-0.8):(2.0-8.0):(0.01-0.05):(0.01-0.05); the molar ratio of 2-methoxyacrylate to N,N-dimethylacrylamide in the monomer is 1:1; The unit of mass fraction is g, and the unit of volume fraction is mL; 3) The double-nano composite hydrogel is fully coated on a fiber fabric with stab-resistant performance, and the double-nano composite hydrogel is allowed to polymerize in a sealed environment for at least 24 hours to obtain a double-nano composite gel-coated stab-resistant composite fabric.

2. The preparation method according to claim 1, characterized in that In the step 1), the stirring temperature is 12-48° C., and the stirring time is 10-50 hours; In the step 1), the ether is methyl tert-butyl ether, and the steps of adding excess ether for precipitation each time are: adding excess ether, filtering, and obtaining a precipitate.

3. The preparation method according to claim 1, characterized in that In step 1), the vacuum drying time is at least 12 hours; In the step 1), the ratio of the ether to the polyether F127 is at least 1600:1 by mass; In the step 2), the stirring is magnetic stirring; In the step 2), the concentration of N,N-dimethylacrylamide in the monomer is 2-8 mol / L; In step 2), the concentration of the initiator potassium persulfate is 2-6 mol / L.

4. The preparation method according to claim 1, characterized in that In step 2), the nitrogen is introduced for 15 to 60 minutes.

5. The preparation method according to claim 1, characterized in that In step 3), the stab-resistant fiber fabric is laid flat in a mold, the double-nano composite hydrogel is placed on the stab-resistant fiber fabric, and the double-nano composite hydrogel on the stab-resistant fiber fabric is evenly scraped with a scraper to ensure that the double-nano composite hydrogel is fully and evenly coated on the surface of the stab-resistant fiber fabric.

6. The preparation method according to claim 1, characterized in that In step 3), the volume fraction of the double nanocomposite hydrogel in the double nanocomposite gel coating stab-proof composite fabric is 20-70%; In step 3), the fiber fabric with stab-resistant performance includes high-performance fibers with high modulus and various woven fabrics, knitted fabrics, three-dimensional weaving, non-woven fabrics and flat fabrics woven therefrom; High-performance fibers include aramid, polyimide, ultra-high molecular weight polyethylene, poly(p-phenylene benzobisoxazole) fiber, and high-strength polyester.

7. The preparation method according to claim 1, characterized in that In step 3), the polymerization process is: first maintaining at 40-80° C. for 2-4 hours in a sealed environment, and then maintaining at 20-30° C. for 12-36 hours.

8. The double-nano composite gel coating stab-proof composite fabric obtained by the preparation method according to any one of claims 1 to 7.

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