Ultra-strong anti-cutting graphene ultra-high molecular weight polyethylene fiber and preparation method thereof

Abstract

The invention discloses an ultra-strong anti-cutting graphene ultra-high molecular weight polyethylene fiber and a preparation method thereof. The method comprises the following steps: S1, dissolving modified graphene oxide powder, carbon fiber powder and a dispersant in a solvent to obtain a functional filler dispersion liquid; s2, uniformly dispersing ultra-high molecular weight polyethylene resin in a solvent in a blending manner to form a uniform resin dispersion liquid; s3, adding the functional filler dispersion liquid into the resin dispersion liquid, stirring and heating to obtain a spinning solution, swelling and extruding the spinning solution to form a molten state, and cooling to form gel filaments; and extracting and drafting the gel silk to obtain the gel silk. Wherein the weight ratio of the modified graphene oxide powder to the carbon fiber powder to the dispersing agent to the ultra-high molecular weight polyethylene resin is (1-3): (40-55): (0.4-0.8): 100.

Description

Technical Field

[0001] The invention relates to the technical field of functional fibers, and in particular to a super-strong cutting-resistant graphene ultra-high molecular weight polyethylene fiber and a preparation method thereof. Background Art

[0002] Ultra-high molecular weight polyethylene (UHMWPE) is known as one of the three high-performance fibers along with carbon fiber and aramid fiber. It is widely used in bulletproof, explosion-proof, industrial protection, aerospace, marine engineering, deep-sea fisheries, life and health and other fields because of its advantages such as light weight, high strength, high modulus, impact resistance and wear resistance.

[0003] Graphene is a two-dimensional honeycomb film formed by SP2 hybridization of carbon atoms. It has good strength, flexibility, thermal conductivity, electrical conductivity and other properties, and has a very high specific surface area. At present, there have been many reports on its application in the preparation of ultra-high molecular weight polyethylene fibers to obtain higher performance.

[0004] In the applicant's previous research results (patent document CN 117966292A), a low creep graphene ultra-high molecular weight polyethylene functional fiber and its preparation method were reported. By using graphene oxide nanosheets with a sheet diameter of 3-4 microns and grafting long-chain chiral amino acid molecules on the surface of the graphene oxide nanosheets for modification, the modified graphene oxide nanosheets were used in the dry process to prepare ultra-high molecular weight polyethylene fibers, and the effects of high cut resistance, high wear resistance, high strength and low creep performance were obtained. However, the cut resistance grade of the ultra-high molecular weight polyethylene fiber prepared by this method is only European standard (EN388) 2-4, and the cut resistance performance is not outstanding. Summary of the invention

[0005] In order to overcome the deficiencies of the prior art, the object of the present invention is to provide a super-strong cutting-resistant graphene ultra-high molecular weight polyethylene fiber and a preparation method thereof.

[0006] In order to solve the above technical problems, the present invention adopts the following technical solutions:

[0007] In a first aspect, the present application provides a method for preparing ultra-strong cutting-resistant graphene ultra-high molecular weight polyethylene fiber, comprising the following steps:

[0008] S1, dissolving modified graphene oxide powder, carbon fiber powder and a dispersant in a solvent to obtain a functional filler dispersion;

[0009] S2, uniformly dispersing the ultra-high molecular weight polyethylene resin in a solvent by blending to form a uniform resin dispersion;

[0010] S3, using a wet spinning method, adding the functional filler dispersion to the resin dispersion, stirring and heating to obtain a spinning solution, swelling and extruding the spinning solution to form a molten state, and then cooling to form a jelly filament; extracting and stretching the jelly filament to obtain a super-strong cut-resistant graphene ultra-high molecular weight polyethylene fiber;

[0011] The weight ratio of the modified graphene oxide powder, carbon fiber powder, dispersant and ultra-high molecular weight polyethylene resin is (1-3): (40-55): (0.4-0.8): 100.

[0012] As a preferred embodiment, in step S1, the modified graphene oxide powder includes amino acid modified graphene oxide powder and silane coupling agent modified graphene oxide powder.

[0013] As a preferred embodiment, the mass ratio of the amino acid modified graphene oxide powder to the silane coupling agent modified graphene oxide powder is 2-4:1.

[0014] As a preferred embodiment, the method for preparing the chiral molecule modified graphene oxide powder comprises the following steps:

[0015] reacting graphene oxide powder with D98≤6μm with chiral molecules to obtain chiral molecule-modified graphene oxide powder;

[0016] Wherein, the chiral molecule is at least one of N-stearoyl-L-glutamic acid, N-palmitoyl-L-glutamic acid, N-myristoyl-L-glutamic acid and N-lauroyl-L-glutamic acid;

[0017] The mass ratio of the chiral molecule to the graphene oxide powder is (1-3):1.

[0018] As a preferred embodiment, the specific preparation method of the chiral molecule modified graphene oxide powder is as follows:

[0019] A1. Mix L-glutamic acid, alkali, acetone and water to form solution a; mix acyl chloride containing an alkyl chain, alkali and water to obtain solution b;

[0020] A 2. Add solution b to solution a while stirring. After the addition is complete, stir and react for 45-90 minutes, cool, and then acidify to obtain a chiral molecule;

[0021] A 3. The chiral molecule is reacted with graphene oxide powder with D98≤6μm to obtain the chiral molecule modified graphene oxide powder.

[0022] As a preferred embodiment, the acyl chloride containing an alkyl chain is at least one selected from stearoyl chloride, palmitoyl chloride, myristoyl chloride and lauroyl chloride.

[0023] As a preferred embodiment, the method for preparing the silane coupling agent modified graphene oxide powder comprises the following steps:

[0024] Adding graphene oxide powder with D98≤6μm and a silane coupling agent into a solvent, stirring for 3-8h at 50-70°C and 800-1000rpm, filtering and drying after the reaction to obtain graphene oxide powder modified with a silane coupling agent;

[0025] The silane coupling agent is selected from at least one of 3-aminopropyltrimethoxysilane and aminopropyltriethoxyvinylsilane.

[0026] As a preferred embodiment, in step S1, the dispersant is selected from at least one of glyceryl monostearate, diethylene glycol fatty acid ester, polyoxyethylene sorbitan monooleate, sodium dodecylbenzene sulfonate, and sodium dodecyl sulfate.

[0027] As a preferred embodiment, the graphene oxide powder with D98≤6 μm is graphene oxide powder prepared by conventional methods or commercially available graphene oxide powder, which is obtained by crushing and sieving.

[0028] As a preferred solution, in step S1, the size of the carbon fiber powder is 1300-1800 mesh, and the aspect ratio is (5-8): 1. In the previous experimental research of the inventor, it was found that the strength and cutting resistance of the prepared fiber can be further improved by using the carbon fiber powder of this specific size and aspect ratio.

[0029] As a preferred embodiment, the carbon fiber powder is obtained by crushing and screening the carbon fiber.

[0030] As a preferred embodiment, in step S2, the weight average molecular weight of the ultra-high molecular weight polyethylene resin is 4.3×10 6 ~5.5×10 6 ; The blending method is specifically high-speed shearing;

[0031] In steps S1 and S2, the solvent is selected from at least one of tetralin, decalin, cyclohexane, paraffin oil, white oil, vegetable oil, and animal oil.

[0032] As a preferred solution, in step S3, the stirring and heating to 120-300° C. is performed to obtain a spinning solution; the cooling time is 40-58 hours;

[0033] The drawing speed is 600-2500 r / min, and the drawing temperature is 150-170°C.

[0034] In the second aspect, the present application provides a super-strong cut-resistant graphene ultra-high molecular weight polyethylene fiber prepared according to the aforementioned method, the breaking strength of the super-strong cut-resistant graphene ultra-high molecular weight polyethylene fiber of 200D is 16-25cN / dtex, and the American standard cut resistance grade is A4-A6 when no steel wire or tungsten wire is added; the breaking strength of the super-strong cut-resistant graphene ultra-high molecular weight polyethylene fiber of 400D is 26-40cN / dtex, and the American standard cut resistance grade is A5-A7 when no steel wire or tungsten wire is added.

[0035] As a preferred solution, the breaking strength of the super-strong cut-resistant graphene ultra-high molecular weight polyethylene fiber of 200D is 19-25cN / dtex, and the American standard cut-resistant grade is A5-A6 when no steel wire or tungsten wire is added; the breaking strength of the super-strong cut-resistant graphene ultra-high molecular weight polyethylene fiber of 400D is 36-40cN / dtex, and the American standard cut-resistant grade is A6-A7 when no steel wire or tungsten wire is added.

[0036] Compared with the prior art, the present invention has the following beneficial effects:

[0037] The present invention adds a specific type of modified graphene oxide and a specific size of carbon fiber to an ultra-high molecular weight polyethylene resin, so that the ultra-high molecular weight polyethylene fiber prepared has super strong cutting resistance and high strength. The breaking strength of the prepared 200D fiber is 16-25 cN / dtex, and the American standard cutting resistance grade is A4-A6; the breaking strength of the 400D fiber can be as high as 26-40 cN / dtex, and the American standard cutting resistance grade is A5-A7. DETAILED DESCRIPTION

[0038] Unless otherwise defined, technical terms or scientific terms used in this specification and claims shall have the ordinary meanings understood by persons with ordinary skills in the technical field to which this application belongs. All values ​​from the lowest value to the highest value listed herein refer to all values ​​obtained by incrementing the lowest value to the highest value by one unit when the difference between the lowest value and the highest value is more than two units.

[0039] The specific implementation methods of the present application will be described below. It should be noted that in the specific description of these implementation methods, in order to provide a concise description, it is impossible for this specification to provide a detailed description of all the features of the actual implementation methods. Without departing from the spirit and scope of the present application, those skilled in the art may modify and replace the implementation methods of the present application, and the resulting implementation methods are also within the scope of protection of the present application.

[0040] Example

[0041] The embodiments of the present application will be described in detail below. This embodiment is implemented on the premise of the technical solution of the present application, and a detailed implementation method and a specific operation process are given, but the protection scope of the present application is not limited to the following embodiments.

[0042] In the following examples, the 3-aminopropyltrimethoxysilane used was purchased from Zhongsheng Chemical (Hangzhou) Co., Ltd., model 3415-1; aminopropyltriethoxyvinylsilane was purchased from Zhongsheng Chemical (Hangzhou) Co., Ltd., model 3415-3; hexadecyltrimethylammonium bromide was purchased from Henan Jinhuobang Chemical Products Co., Ltd., model KJ789; carbon fiber was purchased from Polysheng Carbon Fiber (Guangdong) Co., Ltd., model DY-300, size 400 mesh; diethylene glycol fatty acid ester was purchased from Jinan Baoying Chemical Co., Ltd.; ultra-high molecular weight polyethylene resin was purchased from Suzhou Bellfeng Plastic Co., Ltd., model 5000S, with a weight-average molecular weight of 5 million.

[0043] The methods used in the following examples are all conventional methods unless otherwise specified.

[0044] Example 1

[0045] This embodiment provides a method for preparing ultra-strong cutting-resistant graphene ultra-high molecular weight polyethylene fiber, comprising the following specific steps:

[0046] 1) Preparation of graphene oxide powder with D98≤6μm

[0047] Graphene oxide is prepared by a conventional Hummers method, and then dried, crushed and sieved to obtain graphene oxide powder with D98≤6μm.

[0048] 2) Preparation of chiral molecule-modified graphene oxide

[0049] 35.5g (0.24mol) of L-glutamic acid was dissolved in a mixed solution of 140ml of water, 120ml of acetone and 19.2g of sodium hydroxide to obtain solution a; 60.6g (0.2mol) of stearoyl chloride and 8.0g (0.2mol) of sodium hydroxide were dissolved in 20ml of water to form solution b. Solution b was added dropwise to solution a at 30°C and pH 12 while stirring. After 20min, the addition was completed. The reaction mixture was stirred for 1h, cooled, and then acidified with sulfuric acid to a pH of 1. The obtained precipitated solid C18GluA was washed in petroleum ether to obtain pure crystals.

[0050] Using the hydrothermal synthesis method, 10g of graphene oxide powder with D98≤6μm was mixed with 10g of C18GluA and placed in a supercritical carbon dioxide reaction device. The supercritical temperature was 70°C, the carbon dioxide flow rate was 35L / h, the reactor pressure was 25MPa, water was used as a carrier, the pressure was 20MPa, and the reaction time was 40min. After the reaction was completed, the chiral molecule-modified graphene oxide powder was obtained by filtration and drying.

[0051] 3) Preparation of graphene oxide powder modified by silane coupling agent (3-aminopropyltrimethoxysilane)

[0052] 5 g of 3-aminopropyltrimethoxysilane and 10 g of graphene oxide powder with D98≤6 μm were successively added to a solvent (ethanol), and then stirred at 60° C. and 900 rpm for 5 h. After the reaction was completed, the silane coupling agent-modified graphene oxide powder was filtered and dried.

[0053] 4) Preparation of carbon fiber powder

[0054] The carbon fiber DY-300 was crushed by a jet mill and then sieved by an ultrasonic vibration sieving instrument to obtain a carbon fiber powder with a size of 1800 mesh and an aspect ratio of 7:1.

[0055] 5) Preparation of functional filler dispersion

[0056] In parts by weight, 2 parts of chiral molecule modified graphene oxide powder prepared in step 2), 1 part of silane coupling agent modified graphene oxide powder prepared in step 3), 45 parts of carbon fiber powder prepared in step 4), and 0.5 parts of diethylene glycol fatty acid ester are dissolved in 10 parts of white oil, stirred at 70° C. and 4000 rpm for 3 hours, and the functional filler dispersion is evenly dispersed to obtain a functional filler dispersion.

[0057] 6) Preparation of resin dispersion

[0058] In parts by weight, 100 parts of ultra-high molecular weight polyethylene resin 5000S were added to 300 parts of white oil, and a uniformly dispersed resin dispersion was obtained by high-speed shearing.

[0059] 7) Preparation of ultra-strong cutting-resistant graphene ultra-high molecular weight polyethylene fibers

[0060] The wet spinning method is adopted to add the functional filler dispersion into the resin dispersion, and the mixture is stirred and heated to 200°C to obtain the spinning solution; the spinning solution is swollen and extruded to form a molten state, and then cooled under ice water for 50 hours to form a gel filament; the gel filament is extracted with an ionic liquid, and then stretched at a stretching speed of 1000 r / min and a stretching temperature of 160°C to obtain a super-cutting-resistant graphene ultra-high molecular weight polyethylene fiber.

[0061] Example 2

[0062] This embodiment provides a method for preparing ultra-strong cutting-resistant graphene ultra-high molecular weight polyethylene fiber, comprising the following specific steps:

[0063] 1) Preparation of graphene oxide powder with D98≤6μm

[0064] The method is the same as step 1) of Example 1.

[0065] 2) Preparation of chiral molecule-modified graphene oxide

[0066] The method is basically the same as step 2) of Example 1, except that lauroyl chloride is used instead of stearoyl chloride; and in the hydrothermal synthesis method, the weight of C12GluA used is 20 g.

[0067] 3) Preparation of graphene oxide powder modified with silane coupling agent (aminopropyltriethoxyvinylsilane)

[0068] The method is basically the same as step 3) of Example 1, except that aminopropyltriethoxyvinylsilane is used instead of 3-aminopropyltrimethoxysilane.

[0069] 4) Preparation of carbon fiber powder

[0070] The carbon fiber DY-300 was crushed by a jet mill and then sieved by an ultrasonic vibration sieving instrument to obtain a carbon fiber powder with a size of 1500 mesh and an aspect ratio of 6:1.

[0071] 5) Preparation of functional filler dispersion

[0072] In parts by weight, 1.6 parts of chiral molecule modified graphene oxide powder prepared in step 2), 0.4 parts of silane coupling agent modified graphene oxide powder prepared in step 3), 40 parts of carbon fiber powder prepared in step 4), and 0.8 parts of diethylene glycol fatty acid ester are dissolved in white oil, stirred at 70° C. and 4000 rpm for 3 hours, and the functional filler dispersion is evenly dispersed to obtain a functional filler dispersion.

[0073] 6) Preparation of resin dispersion

[0074] In parts by weight, 100 parts of ultra-high molecular weight polyethylene resin 5000S were added to 200 parts of white oil, and a uniformly dispersed resin dispersion was obtained by high-speed shearing.

[0075] 7) Preparation of ultra-strong cutting-resistant graphene ultra-high molecular weight polyethylene fibers

[0076] The wet spinning method is adopted to add the functional filler dispersion into the resin dispersion, and the mixture is stirred and heated to 120°C to obtain the spinning solution; the spinning solution is swollen and extruded to form a molten state, and then cooled under ice water for 50 hours to form a gel filament; the gel filament is extracted with an ionic liquid, and then stretched at a stretching speed of 1000 r / min and a stretching temperature of 160°C to obtain a super-cutting-resistant graphene ultra-high molecular weight polyethylene fiber.

[0077] Example 3

[0078] This embodiment provides a method for preparing ultra-strong cutting-resistant graphene ultra-high molecular weight polyethylene fiber, comprising the following specific steps:

[0079] 1) Preparation of graphene oxide powder with D98≤6μm

[0080] The method is the same as step 1) of Example 1.

[0081] 2) Preparation of chiral molecule-modified graphene oxide

[0082] The method is basically the same as step 2) of Example 1, except that palmitoyl chloride is used instead of stearoyl chloride; and in the hydrothermal synthesis method, the weight of C16GluA used is 30 g.

[0083] 3) Preparation of graphene oxide powder modified by silane coupling agent (3-aminopropyltrimethoxysilane)

[0084] The method is the same as step 3) of Example 1.

[0085] 4) Preparation of carbon fiber powder

[0086] The carbon fiber DY-300 was crushed by a jet mill and then sieved by a sonic vibration sieving instrument to obtain a carbon fiber powder with a size of 1300 mesh and an aspect ratio of 5:1.

[0087] 5) Preparation of functional filler dispersion

[0088] In parts by weight, 0.75 parts of the chiral molecule modified graphene oxide powder prepared in step 1), 0.25 parts of the silane coupling agent modified graphene oxide powder prepared in step 2), 55 parts of the carbon fiber powder prepared in step 3), and 0.4 parts of diethylene glycol fatty acid ester were dissolved in white oil, stirred at 70° C. and 4000 rpm for 3 h, and the functional filler dispersion was uniformly dispersed.

[0089] 6) Preparation of resin dispersion

[0090] 100 parts by weight of ultra-high molecular weight polyethylene resin 5000S were added to white oil, and a uniformly dispersed resin dispersion was obtained by high-speed shearing.

[0091] 7) Preparation of ultra-strong cutting-resistant graphene ultra-high molecular weight polyethylene fibers

[0092] The wet spinning method is adopted to add the functional filler dispersion into the resin dispersion, and the mixture is stirred and heated to 300°C to obtain the spinning solution; the spinning solution is swollen and extruded to form a molten state, and then cooled under ice water for 50 hours to form a gel filament; the gel filament is extracted with an ionic liquid, and then stretched at a stretching speed of 1000 r / min and a stretching temperature of 160°C to obtain a super-cutting-resistant graphene ultra-high molecular weight polyethylene fiber.

[0093] Example 4

[0094] This embodiment provides a method for preparing ultra-strong cut-resistant graphene ultra-high molecular weight polyethylene fiber, which is basically the same as the method in Example 1, except that: in step 5), 1 part of the chiral molecule modified graphene oxide powder prepared in step 2) and 2 parts of the silane coupling agent modified graphene oxide powder prepared in step 3) are used.

[0095] Example 5

[0096] This embodiment provides a method for preparing ultra-strong cut-resistant graphene ultra-high molecular weight polyethylene fiber, which is basically the same as the method in Example 1, except that: in step 5), 2.5 parts of the chiral molecule modified graphene oxide powder prepared in step 2) and 0.5 parts of the silane coupling agent modified graphene oxide powder prepared in step 3) are used.

[0097] Example 6

[0098] This embodiment provides a method for preparing ultra-strong cut-resistant graphene ultra-high molecular weight polyethylene fiber, which is basically the same as the method in Example 1, except that: in the preparation of silane coupling agent-modified graphene oxide in step 3), hexadecyltrimethylammonium bromide is used instead of 3-aminopropyltrimethoxysilane.

[0099] Comparative Example 1

[0100] This comparative example provides a method for preparing super-cut-resistant graphene ultra-high molecular weight polyethylene fiber, which is basically the same as the method in Example 3, except that: the preparation of silane coupling agent (3-aminopropyltrimethoxysilane) modified graphene oxide powder in step 3) is not carried out; the chiral molecule modified graphene oxide powder used in step 4) is 1 part and the silane coupling agent modified graphene oxide powder is 0 part.

[0101] Comparative Example 2

[0102] This comparative example provides a method for preparing ultra-strong cut-resistant graphene ultra-high molecular weight polyethylene fiber, which is basically the same as the method in Example 3, except that: the preparation of chiral molecule-modified graphene oxide in step 2) is not performed; the chiral molecule-modified graphene oxide used in step 4) is 0 part and the silane coupling agent-modified graphene oxide powder is 1 part.

[0103] Comparative Example 3

[0104] This comparative example provides a method for preparing ultra-strong cut-resistant graphene ultra-high molecular weight polyethylene fiber, which is basically the same as the method in Example 2, except that in the preparation of the carbon fiber powder in step 5), a carbon fiber powder with a size of 800 mesh and an aspect ratio of 4:1 is obtained.

[0105] Comparative Example 4

[0106] This comparative example provides a method for preparing ultra-strong cut-resistant graphene ultra-high molecular weight polyethylene fiber, which is basically the same as the method in Example 2, except that 35 parts of carbon fiber powder are used in step 5).

[0107] Comparative Example 5

[0108] This comparative example provides a method for preparing ultra-strong cut-resistant graphene ultra-high molecular weight polyethylene fiber, which is basically the same as the method in Example 3, except that 60 parts of carbon fiber powder are used in step 5).

[0109] Performance Testing

[0110] 200D and 400D graphene ultra-high molecular weight polyethylene fibers were prepared by the methods of the above embodiments and comparative examples, and the breaking strength test was performed by the standard method of GB / T 29554-2013 Ultra-high Molecular Weight Polyethylene Fiber, and the cutting resistance grade test was performed by the method of ANSI-ISEA105:2016. All test samples were tested under the same conditions. The test results are shown in Table 1.

[0111] Table 1

[0112]

[0113] The above description of the embodiments is to facilitate those of ordinary skill in the art to understand and apply the present application. It is obvious that those familiar with the art can easily make various modifications to these embodiments and apply the general principles described herein to other embodiments without having to pay creative labor. Therefore, the present application is not limited to the embodiments herein, and improvements and modifications made by those skilled in the art based on the contents disclosed in the present application without departing from the scope and spirit of the present application are within the scope of the present application.

Claims

1. A method for preparing super-strong cutting-resistant graphene ultra-high molecular weight polyethylene fiber, characterized in that: The following steps are involved: S1, dissolving modified graphene oxide powder, carbon fiber powder and a dispersant in a solvent to obtain a functional filler dispersion; S2, uniformly dispersing the ultra-high molecular weight polyethylene resin in a solvent by blending to form a uniform resin dispersion; S3, using a wet spinning method, adding the functional filler dispersion to the resin dispersion, stirring and heating to obtain a spinning solution, swelling and extruding the spinning solution to form a molten state, and then cooling to form a jelly filament; extracting and stretching the jelly filament to obtain a super-strong cut-resistant graphene ultra-high molecular weight polyethylene fiber; The weight ratio of the modified graphene oxide powder, carbon fiber powder, dispersant and ultra-high molecular weight polyethylene resin is (1-3): (40-55): (0.4-0.8):

100.

2. The method for preparing the super-strong cutting-resistant graphene ultra-high molecular weight polyethylene fiber according to claim 1, characterized in that: In step S1, the modified graphene oxide powder includes amino acid modified graphene oxide powder and silane coupling agent modified graphene oxide powder.

3. The method for preparing the super-strong cutting-resistant graphene ultra-high molecular weight polyethylene fiber according to claim 1, characterized in that: The mass ratio of the amino acid modified graphene oxide powder to the silane coupling agent modified graphene oxide powder is 2-4:

1.

4. The method for preparing the super-strong cutting-resistant graphene ultra-high molecular weight polyethylene fiber according to claim 2, characterized in that: The preparation method of the chiral molecule modified graphene oxide powder comprises the following steps: reacting graphene oxide powder with D98≤6μm with chiral molecules to obtain chiral molecule-modified graphene oxide nanosheets; Wherein, the chiral molecule is at least one of N-stearoyl-L-glutamic acid, N-palmitoyl-L-glutamic acid, N-myristoyl-L-glutamic acid and N-lauroyl-L-glutamic acid; The mass ratio of the chiral molecule to the graphene oxide powder is (1-3):

1.

5. The method for preparing the super-strong cutting-resistant graphene ultra-high molecular weight polyethylene fiber according to claim 2, characterized in that: The preparation method of the silane coupling agent modified graphene oxide powder comprises the following steps: Adding graphene oxide powder with D98≤6μm and a silane coupling agent into a solvent, stirring for 3-8h at 50-70°C and 800-1000rpm, filtering and drying after the reaction to obtain graphene oxide powder modified with a silane coupling agent; The silane coupling agent is selected from at least one of 3-aminopropyltrimethoxysilane and aminopropyltriethoxyvinylsilane.

6. The method for preparing the super-strong cutting-resistant graphene ultra-high molecular weight polyethylene fiber according to claim 1, characterized in that: In step S1, the dispersant is selected from at least one of glyceryl monostearate, diethylene glycol fatty acid ester, polyoxyethylene sorbitan monooleate, sodium dodecylbenzene sulfonate, and sodium dodecyl sulfate.

7. The method for preparing the super-strong cutting-resistant graphene ultra-high molecular weight polyethylene fiber according to claim 1, characterized in that: In step S1, the size of the carbon fiber powder is 1300-1800 mesh, and the aspect ratio is (5-8):

1.

8. The method for preparing the super-strong cutting-resistant graphene ultra-high molecular weight polyethylene fiber according to claim 7, characterized in that: The carbon fiber powder is obtained by pulverizing and sieving the carbon fiber.

9. The method for preparing the super-strong cutting-resistant graphene ultra-high molecular weight polyethylene fiber according to claim 1, characterized in that: In step S2, the weight average molecular weight of the ultra-high molecular weight polyethylene resin is 4.3×10 6 ~5.5×10 6 ; The blending method is specifically high-speed shearing; In steps S1 and S2, the solvent is selected from at least one of tetralin, decalin, cyclohexane, paraffin oil, white oil, vegetable oil, and animal oil; In step S3, the stirring and heating to 120-300°C are performed to obtain a spinning solution; the cooling time is 40-58h; the drawing speed is 600-2500r / min, and the drawing temperature is 150-170°C.

10. A super-strong cutting-resistant graphene ultra-high molecular weight polyethylene fiber prepared according to the method according to any one of claims 1 to 9, characterized in that: The breaking strength of the 200D super-strong cut-resistant graphene ultra-high molecular weight polyethylene fiber is 16-25 cN / dtex, and the American standard cut-resistant grade is A4-A6 when no steel wire or tungsten wire is added; the breaking strength of the 400D super-strong cut-resistant graphene ultra-high molecular weight polyethylene fiber is 26-40 cN / dtex, and the American standard cut-resistant grade is A5-A7 when no steel wire or tungsten wire is added.

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