A low-friction, wear-resistant polyether ether ketone material and a method of making

Abstract

The application discloses a low-friction and wear-resistant polyether ether ketone material and a preparation method thereof, a SPMK monomer is dissolved in a methanol solution to configure a modified solution with a molar concentration of 0.3-0.7 mol / L; PEEK powder is immersed in the modified solution, stirring is carried out under a high-pressure mercury lamp for 5-10 hours, photo-induced graft polymerization is carried out to obtain modified powder; the modified powder after filtration is ultrasonically cleaned with anhydrous ethanol and deionized water respectively, and is stored after being dried in a 60 DEG C oven for 24 hours after ultrasonic cleaning; the modified powder is loaded into a 0.4*10*10 cm mold; a flat vulcanizing machine is used to load the mold loaded with the modified powder under 10 MPa for 1 hour, then unloading is carried out, each clamp plate of the flat vulcanizing machine is heated to 350-370 DEG C under no load, the clamp plate is lifted to load the mold to 10 MPa, the power of the flat vulcanizing machine is turned off after heat preservation for 5-60 minutes, and the mold is taken out after cooling to room temperature under pressure maintaining.

Description

TECHNICAL FIELD

[0001] The application relates to the technical field of high polymer materials, in particular to a low-friction and wear-resistant polyether ether ketone material and a preparation method. BACKGROUND

[0002] Due to congenital and acquired factors, bone and joint diseases will not only bring inconvenience to the daily life of patients, but also bring physical and mental pain, at which time joint replacement is needed. Traditional artificial joint replacement materials mainly include medical metal materials such as titanium alloy, cobalt-chromium-molybdenum and medical polymer materials such as ultra-high molecular weight polyethylene and polyethylene. These artificial joint pairs are prone to severe wear, metal ion toxicity release, bone tissue dissolution and other problems during long-term service, which affects the service life of the artificial joint. Polyether ether ketone (PEEK) has excellent mechanical strength, good wear resistance, an elastic modulus close to that of human bone and good biocompatibility, and is widely used in the field of artificial joint replacement. However, pure PEEK material cannot achieve ultra-low wear under long-term service, which limits its service life as an artificial joint prosthesis. Therefore, it is necessary to modify the PEEK material to improve its wear resistance.

[0003] The superficial layer of natural cartilage is believed to contain proteoglycans, which can be combined with hyaluronic acid to form a surface brush structure, capable of water absorption and hydration lubrication. In recent years, inspired by natural cartilage, grafting a hydrophilic polymer brush on the surface of PEEK material to improve the surface wettability and lubricity has become a common method. However, when used as an artificial joint prosthesis material, once the surface polymer brush wear-resistant layer is damaged and the matrix material is exposed on the surface, the wear resistance of the material will decrease rapidly and cannot meet the long-term use requirements of the artificial joint. Therefore, the application proposes a new modification method of modification and reforming, which grafts a hydrophilic polymer brush on the PEEK powder by light grafting modification, and the PEEK material as a whole has a hydrophilic polymer brush structure after hot pressing, which improves the overall wear resistance of the material and is of great significance for the development of PEEK material artificial joint sliding interface. SUMMARY

[0004] The technical problem to be solved is:

[0005] The application aims to overcome the technical problems in the prior art that pure PEEK material cannot achieve ultra-low wear under long-term service and cannot meet the long-term use requirements of the artificial joint, and provides a low-friction and wear-resistant polyether ether ketone material and a preparation method.

[0006] Technical scheme

[0007] To achieve the above-mentioned purpose, the application is implemented by the following technical scheme:

[0008] A method for preparing a low-friction and wear-resistant polyether ether ketone material, comprising the following steps:

[0009] Step one: dissolve SPMK monomers in methanol solution to prepare a modified solution with a molar concentration of 0.3-0.7 mol / L;

[0010] Step two: immerse 3g of PEEK powder in 40-60mL of the modified solution prepared in step one under stirring for 5-10h under a high-pressure mercury lamp to perform photo-induced graft polymerization and obtain modified powder;

[0011] Step three: filter the modified powder obtained in step two, and then ultrasonically clean the filtered modified powder with anhydrous ethanol and deionized water respectively, and then dry the ultrasonically cleaned modified powder in an oven at 40-60℃ for 12-24h before storage;

[0012] Step four: place the completely dried modified powder into a mold with a size of 0.4x10x10cm;

[0013] Step five: load the mold containing the modified powder in step four into a flat vulcanizing machine under a pressure of 5-10MPa for 0.5-1h, and then unload, and then raise the clamps of the flat vulcanizing machine to a temperature of 350-370℃, and then load the mold into the flat vulcanizing machine by raising the clamps, and then keep the temperature for 5-60min, and then turn off the power of the flat vulcanizing machine, and then cool to room temperature under pressure, and then take out the mold.

[0014] Preferably, the methanol solution in step one is a 99.5% methanol solution.

[0015] Preferably, in step one, 24.632g of SPMK monomers is dissolved in 200mL of methanol solution to prepare a modified solution with a molar concentration of 0.5mol / L.

[0016] Preferably, in step two, the high-pressure mercury lamp is a 250w high-pressure mercury lamp with a central wavelength of 365nm.

[0017] Preferably, in step two, 12g of PEEK powder is immersed in the modified solution prepared in step one.

[0018] Preferably, in step two, the stirring speed is 600r / min, and the stirring time is 8h.

[0019] Preferably, in step three, the filtering condition is vacuum filtration with a 20-mesh filter paper.

[0020] Preferably, in step three, the ultrasonic cleaning frequency is 40kHz, and the cleaning time is 20min.

[0021] Preferably, in step three, the drying is performed in an oven at 60℃ for 24h.

[0022] Preferably, the mold loaded with the modified powder in step five is loaded at 10 MPa for 1 h, and then unloaded, after the platens of the flat plate vulcanizing machine are heated to 350 DEG C under no load, the mold is loaded to 10 MPa by lifting the platens, and kept for 30 min.

[0023] The technical principle of the application is that: by using a high-pressure mercury lamp with a central wavelength of 365 nm, the application irradiates PEEK powder at room temperature to induce polymerization reaction, grafts hydrophilic polymer brush 3-sulfopropyl methacrylate potassium salt (SPMK) on the PEEK powder, and then forms a shape, because the SPMK side chain has a negatively charged sulfonic acid group, it has excellent hydration lubrication capacity, which helps to lubricate the synovial fluid in the joint cavity. By grafting hydrophilic polymer brush on the powder and then forming a shape, the surface and interior of the PEEK material have hydrophilic polymer brush, thereby improving the wettability and wear resistance of the PEEK material as a whole, so as to obtain a PEEK material with long-term low friction and wear resistance.

[0024] Beneficial effects:

[0025] The application provides a low-friction and wear-resistant polyether ether ketone material and a preparation method, which have the following beneficial effects:

[0026] 1. The application improves the wettability and wear resistance of the PEEK material as a whole by grafting hydrophilic polymer brush on the PEEK powder and then forming a shape, so as to obtain a PEEK material with long-term low friction and wear resistance;

[0027] 2. The application directly grafts SPMK hydrophilic polymer brush on the PEEK powder, and after hot pressing, not only the surface has hydrophilic polymer brush, but also the interior has hydrophilic polymer brush structure;

[0028] 3. Compared with pure PEEK and surface modified PEEK material, the wear-resistant layer of the hydrophilic polymer brush on the surface of the modified PEEK material proposed by the application can also play a role in reducing friction and wear when the wear-resistant layer is damaged, and the internal polymer brush has a lower wear rate and a longer service life;

[0029] 4. The hot pressing process proposed by the application can make the gas in the gap between the powders in the mold be discharged by preloading and then unloading, so that the PEEK plate obtained has fewer internal pores compared with the PEEK plate obtained by directly loading, heating and keeping warm, and the strength and stability of the material are better. BRIEF DESCRIPTION OF DRAWINGS

[0030] Figure 1 is a preparation and hot pressing schematic diagram of the modified polyether ether ketone powder in the application;

[0031] Figure 2X-ray photoelectron spectroscopy of modified polyether ether ketone powder in the present application;

[0032] Figure 3 Mechanical property diagram of modified polyether ether ketone product and pure polyether ether ketone product in the present application, wherein (a) is stress-strain curve; (b) is compression modulus; (c) is hardness;

[0033] Figure 4 Tribological property diagram of modified polyether ether ketone product and pure polyether ether ketone product in the present application, wherein (a) is friction coefficient; (b) is wear rate; (c) is scanning electron microscope image of wear scar. DETAILED DESCRIPTION

[0034] In order to make the above objectives, features and advantages of the present application more obvious and easy to understand, the present application will be further described in detail below in combination with the drawings and examples. Obviously, the described examples are part of the examples of the present application, not all examples, and cannot be understood as a limitation on the protection scope of the present application. Based on the described examples of the present application, all other examples obtained by those skilled in the art belong to the protection scope of the present application.

[0035] The manufacturer and model of the raw material in the present application: PEEK is polyether ether ketone, purchased from Jilin Zhongyan High Polymer Material Co., Ltd., model 770PF; SPMK is 3-sulfopropyl methacrylate potassium salt, purchased from Aldrich Reagent, item number S107131; methanol is purchased from Macklin Reagent, item number M813895;

[0036] Ethanol is purchased from Shanghai Lingfeng Chemical Reagent Co., Ltd., item number E101501.

[0037] Example 1

[0038] A preparation method of a low-friction and wear-resistant polyether ether ketone material, comprising the following steps:

[0039] Step one: 24.632g of SPMK monomer is dissolved in 99.5% methanol solution 200mL to configure a modified solution with a molar concentration of 0.5mol / L;

[0040] Step two: 12g of PEEK powder is immersed in the modified solution according to the mass-volume ratio, and is stirred for 5h under the central wavelength 365nm of 250w high-pressure mercury lamp to carry out photo-induced graft polymerization to obtain modified powder;

[0041] Step three: The modified powder obtained in step two is vacuum filtered with 20-mesh filter paper, and the filtered modified powder is ultrasonically cleaned with anhydrous ethanol and deionized water respectively, and is dried in a 60℃ oven for 24h after ultrasonic cleaning and is stored;

[0042] Step four: the modified powder after drying completely is loaded in a mold of 0.4*10*10 cm;

[0043] Step five: the mold loaded with the modified powder in step four is loaded at 10 MPa for 1 h using a flat vulcanizing machine, then unloaded, after the clamps of the flat vulcanizing machine are heated to 370 DEG C under no load, the mold is loaded to 10 MPa by lifting the clamps, the power of the flat vulcanizing machine is turned off after 60 min of heat preservation, and the mold is taken out after cooling to room temperature under pressure retention.

[0044] Example 2

[0045] A preparation method of a low-friction and wear-resistant polyether ether ketone material, comprising the following steps:

[0046] Step one: 24.632 g of SPMK monomer is dissolved in 99.5% methanol solution 200 mL to configure a modified solution with a molar concentration of 0.5 mol / L;

[0047] Step two: 12 g of PEEK powder is immersed in the modified solution according to the mass-volume ratio, and light-induced graft polymerization is carried out by stirring for 8 h under the central wavelength 365 nm of a 250 w high-pressure mercury lamp to obtain a modified powder;

[0048] Step three: the modified powder obtained in step two is vacuum filtered with a 20-mesh filter paper, and the filtered modified powder is ultrasonically cleaned with anhydrous ethanol and deionized water, respectively, and is stored after drying in a 60 DEG C oven for 24 h after ultrasonic cleaning;

[0049] Step four: the modified powder after drying completely is loaded in a mold of 0.4*10*10 cm;

[0050] Step five: the mold loaded with the modified powder in step four is loaded at 10 MPa for 1 h using a flat vulcanizing machine, then unloaded, after the clamps of the flat vulcanizing machine are heated to 370 DEG C under no load, the mold is loaded to 10 MPa by lifting the clamps, the power of the flat vulcanizing machine is turned off after 60 min of heat preservation, and the mold is taken out after cooling to room temperature under pressure retention.

[0051] Example 3

[0052] A preparation method of a low-friction and wear-resistant polyether ether ketone material, comprising the following steps:

[0053] Step one: 24.632 g of SPMK monomer is dissolved in 99.5% methanol solution 200 mL to configure a modified solution with a molar concentration of 0.5 mol / L;

[0054] Step two: 12g of PEEK powder was immersed in the modified solution according to the mass-volume ratio, and light-induced graft polymerization was carried out under the central wavelength 365nm of 250w high-pressure mercury lamp for 10h to obtain modified powder;

[0055] Step three: the modified powder obtained in step two was vacuum filtered with a 20-mesh filter paper, and the filtered modified powder was ultrasonically cleaned with anhydrous ethanol and deionized water, respectively, and then dried in a 60°C oven for 24h before storage;

[0056] Step four: the completely dried modified powder was placed in a 0.4*10*10cm mold;

[0057] Step five: using a flat vulcanizing machine, the mold containing the modified powder in step four was loaded at 10MPa for 1h, then unloaded, and then the clamps of the flat vulcanizing machine were heated to 370°C, the mold was loaded to 10MPa by lifting the clamps, and the power of the flat vulcanizing machine was turned off after 60min of heat preservation, and then the mold was taken out after cooling to room temperature under pressure.

[0058] Example 4

[0059] A method for preparing a low-friction and wear-resistant polyether ether ketone material, comprising the following steps:

[0060] Step one: 14.779g of SPMK monomer was dissolved in 99.5% methanol solution 200mL to prepare a modified solution with a molar concentration of 0.3mol / L;

[0061] Step two: 12g of PEEK powder was immersed in the modified solution according to the mass-volume ratio, and light-induced graft polymerization was carried out under the central wavelength 365nm of 250w high-pressure mercury lamp for 8h to obtain modified powder;

[0062] Step three: the modified powder obtained in step two was vacuum filtered with a 20-mesh filter paper, and the filtered modified powder was ultrasonically cleaned with anhydrous ethanol and deionized water, respectively, and then dried in a 60°C oven for 24h before storage;

[0063] Step four: the completely dried modified powder was placed in a 0.4*10*10cm mold;

[0064] Step five: using a flat vulcanizing machine, the mold containing the modified powder in step four was loaded at 10MPa for 1h, then unloaded, and then the clamps of the flat vulcanizing machine were heated to 370°C, the mold was loaded to 10MPa by lifting the clamps, and the power of the flat vulcanizing machine was turned off after 60min of heat preservation, and then the mold was taken out after cooling to room temperature under pressure.

[0065] Example 5

[0066] A preparation method of a low-friction and wear-resistant polyether ether ketone material, comprising the following steps:

[0067] Step one: 34.484g of SPMK monomer is dissolved in 99.5% methanol solution 200mL to configure a modified solution with a molar concentration of 0.7mol / L;

[0068] Step two: 12g of PEEK powder is immersed in the modified solution according to the mass-volume ratio, and is stirred for 8h under the central wavelength 365nm of a 250w high-pressure mercury lamp to perform photo-induced graft polymerization to obtain modified powder;

[0069] Step three: The modified powder obtained in step two is vacuum filtered with a 20-mesh filter paper, and the filtered modified powder is ultrasonically cleaned with anhydrous ethanol and deionized water respectively, and is dried in a 60°C oven for 24h after ultrasonic cleaning and is stored;

[0070] Step four: The completely dried modified powder is loaded into a 0.4*10*10cm mold;

[0071] Step five: The mold loaded with the modified powder in step four is loaded at 10MPa for 1h using a flat plate vulcanizing machine, and then is unloaded, and the clamps of the flat plate vulcanizing machine are heated to 370°C, the clamps are raised to load the mold to 10MPa, and the power of the flat plate vulcanizing machine is turned off after 60min of heat preservation, and the mold is taken out after cooling to room temperature in the pressure maintaining state.

[0072] Example 6

[0073] A preparation method of a low-friction and wear-resistant polyether ether ketone material, comprising the following steps:

[0074] Step one: 24.632g of SPMK monomer is dissolved in 99.5% methanol solution 200mL to configure a modified solution with a molar concentration of 0.5mol / L;

[0075] Step two: 12g of PEEK powder is immersed in the modified solution according to the mass-volume ratio, and is stirred for 8h under the central wavelength 365nm of a 250w high-pressure mercury lamp to perform photo-induced graft polymerization to obtain modified powder;

[0076] Step three: The modified powder obtained in step two is vacuum filtered with a 20-mesh filter paper, and the filtered modified powder is ultrasonically cleaned with anhydrous ethanol and deionized water respectively, and is dried in a 60°C oven for 24h after ultrasonic cleaning and is stored;

[0077] Step four: 60g of the completely dried modified powder is loaded into a 0.4*10*10cm mold;

[0078] Step 5: Using a flat vulcanizing machine, load the mold containing the modified powder from Step 4 at 10MPa for 1 hour, then unload it. Under no-load conditions, heat each clamp of the flat vulcanizing machine to 370℃, then raise the clamp to load the mold at 10MPa. Hold the temperature for 30 minutes, then turn off the power to the flat vulcanizing machine. Cool to room temperature under pressure and then remove it.

[0079] Example 7

[0080] A method for preparing a low-friction, wear-resistant polyetheretherketone material includes the following steps:

[0081] Step 1: Dissolve 24.632g of SPMK monomer in 200mL of 99.5% methanol solution to prepare a modified solution with a molar concentration of 0.5mol / L;

[0082] Step 2: Immerse 12g of PEEK powder in the modification solution according to the mass-volume ratio, stir for 8 hours under a 250W high-pressure mercury lamp with a center wavelength of 365nm, and carry out photo-induced graft polymerization to obtain modified powder.

[0083] Step 3: Vacuum filter the modified powder obtained in Step 2 using 20-mesh filter paper. Ultrasonically clean the filtered modified powder with anhydrous ethanol and deionized water, respectively. After ultrasonic cleaning, dry it in an oven at 60°C for 24 hours and then store it.

[0084] Step 4: Take 60g of the completely dried modified powder and put it into a 0.4×10×10cm mold;

[0085] Step 5: Using a flat vulcanizing machine, load the mold containing the modified powder from Step 4 at 10MPa for 1 hour, then unload it. Under no-load conditions, heat each clamp of the flat vulcanizing machine to 370℃, then raise the clamp to load the mold at 10MPa. Hold the temperature for 5 minutes, then turn off the power to the flat vulcanizing machine. Cool to room temperature under pressure and then remove it.

[0086] Example 8

[0087] A method for preparing a low-friction, wear-resistant polyetheretherketone material includes the following steps:

[0088] Step 1: Dissolve 24.632g of SPMK monomer in 200mL of 99.5% methanol solution to prepare a modified solution with a molar concentration of 0.5mol / L;

[0089] Step 2: Immerse 12g of PEEK powder in the modification solution according to the mass-volume ratio, stir for 8 hours under a 250W high-pressure mercury lamp with a center wavelength of 365nm, and carry out photo-induced graft polymerization to obtain modified powder.

[0090] Step 3: Vacuum filter the modified powder obtained in Step 2 using 20-mesh filter paper. Ultrasonically clean the filtered modified powder with anhydrous ethanol and deionized water, respectively. After ultrasonic cleaning, dry it in an oven at 60°C for 24 hours and then store it.

[0091] Step 4: Take 60g of the completely dried modified powder and put it into a 0.4×10×10cm mold;

[0092] Step 5: Using a flat vulcanizing machine, load the mold containing the modified powder from Step 4 at 10MPa for 1 hour, then unload it. Under no-load conditions, heat each clamp of the flat vulcanizing machine to 360℃, then raise the clamp to load the mold at 10MPa. Hold the temperature for 30 minutes, then turn off the power to the flat vulcanizing machine. Cool to room temperature under pressure and then remove it.

[0093] Example 9

[0094] A method for preparing a low-friction, wear-resistant polyetheretherketone material includes the following steps:

[0095] Step 1: Dissolve 24.632g of SPMK monomer in 200mL of 99.5% methanol solution to prepare a modified solution with a molar concentration of 0.5mol / L;

[0096] Step 2: Immerse 12g of PEEK powder in the modification solution according to the mass-volume ratio, stir for 8 hours under a 250W high-pressure mercury lamp with a center wavelength of 365nm, and carry out photo-induced graft polymerization to obtain modified powder.

[0097] Step 3: Vacuum filter the modified powder obtained in Step 2 using 20-mesh filter paper. Ultrasonically clean the filtered modified powder with anhydrous ethanol and deionized water, respectively. After ultrasonic cleaning, dry it in an oven at 60°C for 24 hours and then store it.

[0098] Step 4: Take 60g of the completely dried modified powder and put it into a 0.4×10×10cm mold;

[0099] Step 5: Using a flat vulcanizing machine, load the mold containing the modified powder from Step 4 at 10MPa for 1 hour, then unload it. Under no-load conditions, heat each clamp of the flat vulcanizing machine to 350℃, then raise the clamp to load the mold at 10MPa. Hold the temperature for 30 minutes, then turn off the power to the flat vulcanizing machine. Cool to room temperature under pressure and then remove it.

[0100] Comparative Example 1

[0101] A method for preparing PEEK material includes the following steps:

[0102] Step 1: Weigh 60g of pure PEEK powder and dry it in a 60℃ oven for 24 hours before storing.

[0103] Step 2: Weigh 60g of the completely dried pure PEEK powder and place it into a 0.4×10×10cm mold;

[0104] Step 3: Using a flat vulcanizing machine, load the mold containing pure PEEK powder from Step 2 at 10MPa for 1 hour, then unload it. Under no-load conditions, heat each clamp of the flat vulcanizing machine to 370℃, then raise the clamp to load the mold at 10MPa. Hold the temperature for 60 minutes, then turn off the power to the flat vulcanizing machine. Cool the mold to room temperature under pressure and then remove it.

[0105] Comparative Example 2

[0106] A method for preparing PEEK material includes the following steps:

[0107] Step 1: Weigh 60g of pure PEEK powder and dry it in a 60℃ oven for 24 hours before storing.

[0108] Step 2: Weigh 60g of the completely dried pure PEEK powder and place it into a 0.4×10×10cm mold;

[0109] Step 3: Using a flat vulcanizing machine, load the mold containing pure PEEK powder from Step 2 at 10MPa for 1 hour, then unload it. Under no-load conditions, heat each clamp of the flat vulcanizing machine to 350℃, then raise the clamp to load the mold at 10MPa. Hold the temperature for 30 minutes, then turn off the power to the flat vulcanizing machine. Cool the mold to room temperature under pressure and then remove it.

[0110] Table 1. Process parameters of Examples 1-10 and Comparative Examples 1-2

[0111]

[0112] The mechanical and tribological properties of the PEEK samples obtained in Examples 1-9 and Comparative Examples 1-2 were tested, and the wear morphology after friction was examined.

[0113] To evaluate the effects of different illumination times and modification concentrations on the modification effect of PEEK powder, the modified PEEK powders obtained in Examples 1-5 were characterized using X-ray photoelectron spectroscopy and Fourier transform infrared spectroscopy. Figure 2 As shown. By Figure 2 The results showed that the peak at 167 eV of the modified powder with a modification concentration of 0.5 mol / L and an irradiation time of 8 h belonged to the -SO3-C group, while this phenomenon was not observed in pure PEEK powder, indicating that SPMK was successfully grafted onto PEEK powder.

[0114] To evaluate the effects of different hot-pressing processes on the mechanical properties of PEEK, hardness and compression tests were conducted on the PEEK samples obtained in Examples 2, 6-9, and Comparative Examples 1-2 using a Shore hardness tester and an electronic universal testing machine. Figure 3 As shown. Figure 3 The results showed that the PEEK sample with a holding temperature of 350℃ and a holding time of 30 min had a hardness of 92.5HD and a compressive modulus of 18.43MPa, indicating that the modified PEEK plate still has good mechanical properties and meets the mechanical requirements of joint prostheses.

[0115] To evaluate the tribological properties of the PEEK samples prepared in Examples 2, 6-9, and Comparative Examples 1-2, friction tests were conducted on the three groups of samples using a micro-friction and wear testing machine. The morphology of the wear tracks left after friction on the three groups of samples was characterized using scanning electron microscopy and atomic force microscopy. Figure 4 As shown in the figure, the modified PEEK sample prepared in Example 9 has a lower coefficient of friction and wear rate, and a lower degree of wear on the wear track surface, which is beneficial to improving the wear resistance of the sliding interface of the joint prosthesis and extending the service life of the prosthesis.

[0116] The above embodiments and comparative examples are merely illustrative of the principles and effects of the present invention and are not intended to limit the invention. It should be noted that modifications or improvements made to the above embodiments by those skilled in the art without departing from the spirit and scope of the present invention should also be considered within the scope of protection of the present invention.

Claims

1. A method for preparing a low-friction, wear-resistant polyetheretherketone material, characterized in that, Includes the following steps: Step 1: Dissolve the potassium 3-sulfonopropyl methacrylate monomer in methanol to prepare a modified solution with a molar concentration of 0.3-0.7 mol / L; Step 2: Immerse 3g of polyetheretherketone powder in 40-60mL of modification solution according to the mass-volume ratio, stir under a high-pressure mercury lamp for 5-10h, and carry out photo-induced graft polymerization to obtain modified powder; Step 3: Filter the modified powder obtained in Step 2, and ultrasonically clean the filtered modified powder with anhydrous ethanol and deionized water respectively. After ultrasonic cleaning, dry it in an oven at 40-60℃ for 12-24 hours and then store it. Step 4: Place the completely dried modified powder into a 0.4×10×10cm mold; Step 5: Using a flat vulcanizing machine, load the mold containing the modified powder from Step 4 at 10MPa for 1 hour, then unload it. Under no-load conditions, heat each clamp of the flat vulcanizing machine to 350℃, then raise the clamp to load the mold at 10MPa. Hold the temperature for 30 minutes, then turn off the power to the flat vulcanizing machine. Cool to room temperature under pressure and then remove it.

2. The low-friction, wear-resistant polyetheretherketone material and its preparation method according to claim 1, characterized in that: The methanol solution in step one is a 99.5% methanol solution.

3. The low-friction, wear-resistant polyetheretherketone material and its preparation method according to claim 1, characterized in that: In step one, 24.632 g of potassium 3-sulfonopropyl methacrylate monomer was dissolved in 200 mL of methanol solution to prepare a modified solution with a molar concentration of 0.5 mol / L.

4. The low-friction, wear-resistant polyetheretherketone material and its preparation method according to claim 1, characterized in that: In step two, the high-pressure mercury lamp is a 250W high-pressure mercury lamp with a center wavelength of 365nm.

5. The low-friction, wear-resistant polyetheretherketone material and its preparation method according to claim 1, characterized in that: In step two, 12g of polyetheretherketone powder is immersed in the modified solution prepared in step one according to the mass-volume ratio.

6. The low-friction, wear-resistant polyetheretherketone material and its preparation method according to claim 1, characterized in that: In step two, the stirring speed is 600 r / min, and the stirring time is 8 hours.

7. The low-friction, wear-resistant polyetheretherketone material and its preparation method according to claim 1, characterized in that: In step three, the filtration conditions are vacuum filtration using 20-mesh filter paper.

8. The low-friction, wear-resistant polyetheretherketone material and its preparation method according to claim 1, characterized in that: In step three, the ultrasonic cleaning frequency is 40kHz and the cleaning time is 20min.

9. The low-friction, wear-resistant polyetheretherketone material and its preparation method according to claim 1, characterized in that: In step three, the product is dried in an oven at 60°C for 24 hours.

Images