High-wear-resistance polyether-ether-ketone composite material for gear, preparation method and gear

Abstract

The invention relates to a high-wear-resistance polyether-ether-ketone composite material for a gear, a preparation method and the gear. The composite material is composed of the following materials in percentage by mass: 55-70% of polyether-ether-ketone; 0-25 parts of thermoplastic polyimide; 10 to 15 parts of modified aramid fiber; 5-10 parts of graphene oxide; and 0.5-1 part of an antioxidant. The modified aramid fiber and the polyether-ether-ketone resin are combined more tightly, the probability of fiber falling is reduced in the abrasion process, and furrow abrasion and particle adhesion abrasion are reduced. By adding the graphene oxide, the friction coefficient of the composite material is further reduced, and a stable lubricating transfer film can be generated under long-term high load. The prepared polyether-ether-ketone composite material has the characteristic of low wear and excellent mechanical properties, can be used as a solid self-lubricating material to be processed into various gear products, and is applied to the fields of aviation, aerospace, machinery, chemical engineering and the like.

Description

Technical Field

[0001] The invention relates to the technical field of polymer materials, and in particular to a highly wear-resistant polyetheretherketone composite material for gears, a preparation method and the gears. Background Art

[0002] Compared with metal gears, plastic gears have the characteristics of light weight, small inertia, no need for external lubrication, corrosion resistance, wear resistance, low noise, and good insulation. They are widely used in automobiles, low-voltage electrical appliances, industrial production and other fields. Based on the plastic injection molding process, plastic gears are easy to mass produce and can also achieve complex geometric shapes and coloring.

[0003] However, the working temperature of gears made of ordinary engineering plastics is relatively low, generally below 120°C, and cannot be used under some harsh working conditions such as high temperature, radiation, high pressure, and high wear resistance. PEEK (polyetheretherketone) has many advantages such as high strength, good toughness, easy processing, good dimensional stability, and low thermal expansion coefficient, making it an ideal material for gear preparation. However, under harsh working conditions, the wear resistance requirements of materials are getting higher and higher. PEEK has poor wear resistance and needs to be modified to meet the use requirements. Summary of the invention

[0004] The first invention of this invention is to overcome the shortcomings of the prior art and solve the shortcomings of PEEK gears with high wear rate and inability to withstand high loads. To provide a PEEK composite material that can maintain high wear resistance and extremely low wear rate under high load and harsh working conditions.

[0005] The second invention of the present invention is to solve the many difficulties in the melt blending processing of PEEK composite materials and provide a suitable processing technology.

[0006] To achieve the purpose of the present invention, the present invention adopts the following technical solutions:

[0007] A highly wear-resistant polyetheretherketone composite material for gears, consisting of the following materials by mass percentage:

[0008]

[0009] In some embodiments, the polyetheretherketone is purchased from Victrex, model: 450G; the thermoplastic polyimide is purchased from Saudi Sabic, model: EXTEM XH1015; the graphene oxide is purchased from Jiangsu Xianfeng Nanomaterial Technology Co., Ltd., model: XFSG01; the antioxidant is Irganox 1098 from BASF; and the aramid fiber is AF1414 chopped aramid fiber from DuPont.

[0010] In some embodiments, 60 parts of polyetheretherketone, 20 parts of thermoplastic polyimide, 9.5 parts of graphene oxide, 10 parts of modified aramid fiber, and 0.5 parts of antioxidant are used;

[0011] Or, using 70 parts of polyetheretherketone, 10 parts of thermoplastic polyimide, 9 parts of graphene oxide, 10 parts of modified aramid fiber, and 1 part of antioxidant;

[0012] Or, using 65 parts of polyetheretherketone, 15 parts of thermoplastic polyimide, 5 parts of graphene oxide, 14.5 parts of modified aramid fiber, and 0.5 parts of antioxidant;

[0013] Or, using 55 parts of polyetheretherketone, 25 parts of thermoplastic polyimide, 9.2 parts of graphene oxide, 10 parts of modified aramid fiber, and 0.8 parts of antioxidant;

[0014] Or, 55 parts of polyetheretherketone, 10 parts of thermoplastic polyimide, 9.5 parts of graphene oxide, 25 parts of modified aramid fiber, and 0.5 parts of antioxidant are used.

[0015] A method for preparing a highly wear-resistant polyetheretherketone composite material for gears, comprising the following steps:

[0016] S100: weighing various raw materials according to the formula, and drying the weighed polyetheretherketone and thermoplastic polyimide;

[0017] S200: mixing the polyetheretherketone, thermoplastic polyimide and antioxidant dried in step S100 in a high-speed mixer for 5 minutes and then melt-extruding to form a polyetheretherketone alloy material;

[0018] S300: The polyetheretherketone alloy material in step S200 is mixed with other raw materials in a high-speed mixer for 10 minutes, and then melt-extruded to form a polyetheretherketone composite material.

[0019] In some embodiments, the drying process in step S100 is performed at a temperature of 150-170° C. and the drying time is 4-8 hours.

[0020] In some embodiments, the melt extrusion operations in step S200 and step S300 are carried out in an extruder, and the temperatures of each section in the extruder are: 320-350°C in zone 1, 350-370°C in zone 2, 370-380°C in zone 3, 380-390°C in zone 4, 380-390°C in zone 5, 380-390°C in zone 6, 380-390°C in zone 7, 380-390°C in zone 8, 370-380°C in zone 9, 370-380°C in zone 10, and 395-400°C in zone 11, wherein the screw aspect ratio is 36-48, and the screw speed is 200-500rpm.

[0021] In some embodiments, the modified aramid fiber is prepared by the following steps, including:

[0022] Step 1: firstly oxidizing the aramid fiber with acid to obtain oxidized aramid fiber;

[0023] Step 2: reacting the oxidized aramid fiber with a silane coupling agent to prepare the modified aramid fiber, wherein the acid is a 30% phosphoric acid aqueous solution, and the mass ratio of the silane coupling agent to the oxidized aramid fiber is 1:200-800.

[0024] In some embodiments, in step one, the aramid fiber is first cleaned with acetone and ultrasonically dispersed. After 4-6 hours, it is rinsed with clean water 3-5 times and dried; then the dried aramid fiber is immersed in a phosphoric acid aqueous solution, ultrasonically dispersed at 60-80°C, and after 30-120 minutes, it is rinsed with distilled water 3-5 times and vacuum dried at 80-100°C.

[0025] In some embodiments, in the step 2, the aramid fiber treated in the step 1 is immersed in a solution of silane coupling agent KH550, ethanol and distilled water in a ratio of 25:65:10, and ultrasonically dispersed. After 4-24 hours, it is rinsed with distilled water 3-5 times and vacuum dried at 80-100°C to prepare modified aramid fiber for later use.

[0026] A gear is made of the above-mentioned high-wear-resistant polyetheretherketone composite material for gears.

[0027] Technical effect of the present invention: The polyetheretherketone composite material prepared by the present invention has the characteristics of low wear and excellent mechanical properties, can be processed into various gear products as a solid self-lubricating material, and is used in the fields of aviation, aerospace, machinery, chemical industry, etc. DETAILED DESCRIPTION

[0028] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in combination with the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, rather than all the embodiments.

[0029] The present embodiment provides a highly wear-resistant polyetheretherketone composite material for gears, which is composed of the following materials by mass percentage: polyetheretherketone 55-70; thermoplastic polyimide 10-25; modified aramid fiber 10-15; graphene oxide 5-10; antioxidant 0.5-1. The modified aramid fiber in the present embodiment is more tightly combined with the polyetheretherketone resin, which reduces the probability of fiber shedding during wear, and reduces furrow wear and particle adhesion wear. The addition of graphene oxide further reduces the friction coefficient of the composite material, and can generate a stable lubrication transfer film under long-term high load.

[0030] Furthermore, the polyetheretherketone (PEEK) of this embodiment is a well-known commercial product purchased from VICTREX, model: 450G.

[0031] Furthermore, thermoplastic polyimide (TPI) is a known commercial product purchased from SABIC, Saudi Arabia, model: EXTEM XH1015.

[0032] Furthermore, graphene oxide (GO) is a known commercially available product purchased from Jiangsu Xianfeng Nanomaterial Technology Co., Ltd., model: XFSG01.

[0033] Furthermore, the silane coupling agent is a well-known commercially available product, Shanghai Aladdin Biochemical Technology Co., Ltd., model: KH550.

[0034] Furthermore, the antioxidant may be Irganox 1098 produced by BASF.

[0035] Furthermore, the aramid fiber (AF) can be 6 mm AF1414 chopped aramid fiber from DuPont.

[0036] As an improvement, the modified aramid fiber of this embodiment is prepared by the following method: first, aramid fiber is oxidized by acid to obtain oxidized aramid fiber, and then the oxidized aramid fiber is reacted with a silane coupling agent to prepare the modified aramid fiber, wherein the acid is a 30% phosphoric acid aqueous solution, and the mass ratio of the silane coupling agent to the oxidized aramid fiber is 1:200-800.

[0037] Specifically, the modified aramid fiber is prepared by the following method: first, the aramid fiber is cleaned with acetone, ultrasonically dispersed, and rinsed with clean water 3-5 times and dried after 4-6 hours; then, the dried aramid fiber is immersed in a phosphoric acid aqueous solution, ultrasonically dispersed at 60-80°C, rinsed with distilled water 3-5 times after 30-120 minutes, and vacuum dried at 80-100°C. The treated aramid fiber is immersed in a solution of silane coupling agent KH550, ethanol and distilled water in a ratio of 25:65:10, ultrasonically dispersed, rinsed with distilled water 3-5 times after 4-24 hours, and vacuum dried at 80-100°C to prepare the modified aramid fiber for standby use.

[0038] A method for preparing a highly wear-resistant polyetheretherketone composite material for gears comprises the following steps:

[0039] (1) Weigh each raw material according to the formula, and dry the weighed polyetheretherketone and thermoplastic polyimide.

[0040] (2) The polyetheretherketone, thermoplastic polyimide and antioxidant dried in step (1) are mixed in a high-speed mixer for 5 minutes and then melt-extruded to form a polyetheretherketone alloy material.

[0041] (3) The polyetheretherketone alloy material in step (2) is mixed with other raw materials in a high-speed mixer for 10 minutes, and then melt-extruded to prepare a polyetheretherketone composite material.

[0042] Furthermore, the drying treatment in step (1) is carried out at a temperature of 150-170° C. and a drying time of 4-8 hours.

[0043] Further, the melt extrusion operation in step (2) and step (3) is carried out in an extruder. Preferably, the temperature of each section in the extruder is: 320-350°C in zone 1, 350-370°C in zone 2, 370-380°C in zone 3, 380-390°C in zone 4, 380-390°C in zone 5, 380-390°C in zone 6, 380-390°C in zone 7, 380-390°C in zone 8, 370-380°C in zone 9, 370-380°C in zone 10, and 395-400°C in zone 11, wherein the screw aspect ratio is 36-48 and the screw speed is 200-500rpm.

[0044] The polyetheretherketone composite material prepared by the present invention has the characteristics of low wear and excellent mechanical properties, can be processed into various gear products as a solid self-lubricating material, and is applied in the fields of aviation, aerospace, machinery, chemical industry, etc.

[0045] The present application is further described below in conjunction with specific embodiments.

[0046] <Example 1>

[0047] The present embodiment provides a highly wear-resistant polyetheretherketone composite material for gears. The raw materials used, in terms of mass percentage, are: 60 parts of polyetheretherketone, 20 parts of thermoplastic polyimide, 9.5 parts of graphene oxide, 10 parts of modified aramid fiber, and 0.5 parts of antioxidant.

[0048] Its preparation method is:

[0049] (1) Weigh each raw material according to the formula, put the weighed polyetheretherketone and thermoplastic polyimide into an oven for drying at a temperature of 150° C. for 6 hours.

[0050] (2) The polyetheretherketone, thermoplastic polyimide and antioxidant dried in step (1) are mixed in a high-speed mixer for 5 minutes, and then melt-extruded to form a polyetheretherketone alloy material.

[0051] (3) The polyetheretherketone alloy material in step (2) is mixed with other raw materials in a high-speed mixer for 10 minutes, and then melt-extruded to prepare a polyetheretherketone composite material.

[0052] The temperatures of the extruders in step (2) and step (3) are as follows: 320° C. in zone 1, 340° C. in zone 2, 370° C. in zone 3, 380° C. in zone 4, 390° C. in zone 5, 390° C. in zone 6, 390° C. in zone 7, 390° C. in zone 8, 380° C. in zone 9, 380° C. in zone 10, and 400° C. in zone 11; the aspect ratio of the screw is 44, and the screw speed is 265 rpm.

[0053] Injection molding sample, process settings: drying temperature 155℃, drying time 4 hours, injection molding machine front section temperature 370℃, middle section temperature 380℃, rear section temperature 390℃, nozzle temperature 400 degrees, back pressure 55MPa, injection pressure 90MPa, injection speed 75mm / s, mold temperature 140℃.

[0054] <Example 2>

[0055] The present embodiment provides a highly wear-resistant polyetheretherketone composite material for gears. The raw materials thereof are, by weight, 70 parts of polyetheretherketone, 10 parts of thermoplastic polyimide, 9 parts of graphene oxide, 10 parts of modified aramid fiber, and 1 part of antioxidant.

[0056] Its preparation method is:

[0057] (1) Weigh each raw material according to the formula, put the weighed polyetheretherketone and thermoplastic polyimide into an oven for drying at a temperature of 150° C. for 6 hours.

[0058] (2) The polyetheretherketone, thermoplastic polyimide and antioxidant dried in step (1) are mixed in a high-speed mixer for 5 minutes, and then melt-extruded to form a polyetheretherketone alloy material.

[0059] (3) The polyetheretherketone alloy material in step (2) is mixed with other raw materials in a high-speed mixer for 10 minutes, and then melt-extruded to prepare a polyetheretherketone composite material.

[0060] The temperatures of the extruders in step (2) and step (3) are as follows: 320° C. in zone 1, 340° C. in zone 2, 370° C. in zone 3, 380° C. in zone 4, 390° C. in zone 5, 390° C. in zone 6, 390° C. in zone 7, 390° C. in zone 8, 380° C. in zone 9, 380° C. in zone 10, and 400° C. in zone 11; the aspect ratio of the screw is 44, and the screw speed is 265 rpm.

[0061] Injection molding sample, process settings: drying temperature 155℃, drying time 4 hours, injection molding machine front section temperature 370℃, middle section temperature 380℃, rear section temperature 390℃, nozzle temperature 400 degrees, back pressure 55MPa, injection pressure 90MPa, injection speed 75mm / s, mold temperature 140℃.

[0062] <Example 3>

[0063] The present embodiment provides a highly wear-resistant polyetheretherketone composite material for gears, which comprises, by weight, 65 parts of polyetheretherketone, 15 parts of thermoplastic polyimide, 5 parts of graphene oxide, 14.5 parts of modified aramid fiber, and 0.5 parts of antioxidant.

[0064] Its preparation method is:

[0065] (1) Weigh each raw material according to the formula, put the weighed polyetheretherketone and thermoplastic polyimide into an oven for drying at a temperature of 150° C. for 6 hours.

[0066] (2) The polyetheretherketone, thermoplastic polyimide and antioxidant dried in step (1) are mixed in a high-speed mixer for 5 minutes, and then melt-extruded to form a polyetheretherketone alloy material.

[0067] (3) The polyetheretherketone alloy material in step (2) is mixed with other raw materials in a high-speed mixer for 10 minutes, and then melt-extruded to prepare a polyetheretherketone composite material.

[0068] The temperatures of the extruders in step (2) and step (3) are as follows: 320° C. in zone 1, 340° C. in zone 2, 370° C. in zone 3, 380° C. in zone 4, 390° C. in zone 5, 390° C. in zone 6, 390° C. in zone 7, 390° C. in zone 8, 380° C. in zone 9, 380° C. in zone 10, and 400° C. in zone 11; the aspect ratio of the screw is 44, and the screw speed is 265 rpm.

[0069] Injection molding sample, process settings: drying temperature 155℃, drying time 4 hours, injection molding machine front section temperature 370℃, middle section temperature 380℃, rear section temperature 390℃, nozzle temperature 400 degrees, back pressure 55MPa, injection pressure 90MPa, injection speed 75mm / s, mold temperature 140℃.

[0070] <Example 4>

[0071] The present embodiment provides a highly wear-resistant polyetheretherketone composite material for gears, which comprises, by weight, 55 parts of polyetheretherketone, 25 parts of thermoplastic polyimide, 9.2 parts of graphene oxide, 10 parts of modified aramid fiber, and 0.8 parts of antioxidant.

[0072] Its preparation method is:

[0073] (1) Weigh each raw material according to the formula, put the weighed polyetheretherketone and thermoplastic polyimide into an oven for drying at a temperature of 150° C. for 6 hours.

[0074] (2) The polyetheretherketone, thermoplastic polyimide and antioxidant dried in step (1) are mixed in a high-speed mixer for 5 minutes, and then melt-extruded to form a polyetheretherketone alloy material.

[0075] (3) The polyetheretherketone alloy material in step (2) is mixed with other raw materials in a high-speed mixer for 10 minutes, and then melt-extruded to prepare a polyetheretherketone composite material.

[0076] The temperatures of the extruders in step (2) and step (3) are as follows: 320° C. in zone 1, 340° C. in zone 2, 370° C. in zone 3, 380° C. in zone 4, 390° C. in zone 5, 390° C. in zone 6, 390° C. in zone 7, 390° C. in zone 8, 380° C. in zone 9, 380° C. in zone 10, and 400° C. in zone 11; the aspect ratio of the screw is 44, and the screw speed is 265 rpm.

[0077] Injection molding sample, process settings: drying temperature 155℃, drying time 4 hours, injection molding machine front section temperature 370℃, middle section temperature 380℃, rear section temperature 390℃, nozzle temperature 400 degrees, back pressure 55MPa, injection pressure 90MPa, injection speed 75mm / s, mold temperature 140℃.

[0078] <Example 5>

[0079] The present embodiment provides a highly wear-resistant polyetheretherketone composite material for gears, which comprises, by weight, 55 parts of polyetheretherketone, 10 parts of thermoplastic polyimide, 9.5 parts of graphene oxide, 25 parts of modified aramid fiber, and 0.5 parts of antioxidant.

[0080] Its preparation method is:

[0081] (1) Weigh each raw material according to the formula, put the weighed polyetheretherketone and thermoplastic polyimide into an oven for drying at a temperature of 150° C. for 6 hours.

[0082] (2) The polyetheretherketone, thermoplastic polyimide and antioxidant dried in step (1) are mixed in a high-speed mixer for 5 minutes, and then melt-extruded to form a polyetheretherketone alloy material.

[0083] (3) The polyetheretherketone alloy material in step (2) is mixed with other raw materials in a high-speed mixer for 10 minutes, and then melt-extruded to prepare a polyetheretherketone composite material.

[0084] The temperatures of the extruders in step (2) and step (3) are as follows: 320° C. in zone 1, 340° C. in zone 2, 370° C. in zone 3, 380° C. in zone 4, 390° C. in zone 5, 390° C. in zone 6, 390° C. in zone 7, 390° C. in zone 8, 380° C. in zone 9, 380° C. in zone 10, and 400° C. in zone 11; the aspect ratio of the screw is 44, and the screw speed is 265 rpm.

[0085] Injection molding sample, process settings: drying temperature 155℃, drying time 4 hours, injection molding machine front section temperature 370℃, middle section temperature 380℃, rear section temperature 390℃, nozzle temperature 400 degrees, back pressure 55MPa, injection pressure 90MPa, injection speed 75mm / s, mold temperature 140℃.

[0086] Comparative Example 1

[0087] Calculated by weight, the raw materials include: 80 parts of polyetheretherketone, 19.5 parts of thermoplastic polyimide, and 0.5 parts of antioxidant.

[0088] Its preparation method is:

[0089] (1) Weigh each raw material according to the formula, put the weighed polyetheretherketone and thermoplastic polyimide into an oven for drying at a temperature of 150° C. for 6 hours.

[0090] (2) The polyetheretherketone, thermoplastic polyimide and antioxidant dried in step (1) are mixed in a high-speed mixer for 5 minutes, and then melt-extruded to form a polyetheretherketone alloy material.

[0091] The temperatures of the extruder in step (2) are as follows: 320° C. in zone 1, 340° C. in zone 2, 370° C. in zone 3, 380° C. in zone 4, 390° C. in zone 5, 390° C. in zone 6, 390° C. in zone 7, 390° C. in zone 8, 380° C. in zone 9, 380° C. in zone 10, and 400° C. in zone 11; the aspect ratio of the screw is 44, and the screw speed is 265 rpm.

[0092] Injection molding sample, process settings: drying temperature 155℃, drying time 4 hours, injection molding machine front section temperature 370℃, middle section temperature 380℃, rear section temperature 390℃, nozzle temperature 400 degrees, back pressure 55MPa, injection pressure 90MPa, injection speed 75mm / s, mold temperature 140℃.

[0093] Comparative Example 2

[0094] The raw materials of this comparative example (by mass): 100 parts of polyetheretherketone, direct injection molding.

[0095] Injection molding sample, process settings: drying temperature 150℃, drying time 4 hours, injection molding machine front section temperature 340℃, middle section temperature 350℃, rear section temperature 360℃, nozzle temperature 365 degrees, back pressure 45MPa, injection pressure 90MPa, injection speed 75mm / s, mold temperature 140℃.

[0096] The injection molded samples prepared in the above examples were subjected to wear tests, and the test results are shown in the following table:

[0097]

[0098] The calculation method of volume wear rate in the above table is:

[0099] Where: K is the volume wear rate; △m is the mass difference of the sample before and after wear; p is the sample density; N is the load; L is the sliding friction distance.

[0100] From the data in the above table, it can be seen that the wear resistance of the modified PEEK composite material is several orders of magnitude higher than that of pure resin, and the wear rate is significantly reduced.

[0101] The modified PEEK composite material shown in the present invention has excellent performance in terms of friction and wear, and is suitable for preparing various gears for use in industries with extreme working conditions such as electronics, aerospace, and automobiles. As a good solid lubricating and wear-resistant material, the gears prepared from the modified material are also suitable for various manufacturing fields with demand.

[0102] The technical principle of the present invention is described above in combination with specific embodiments, but it should be noted that the above descriptions are only for explaining the principle of the present invention and cannot be interpreted as a specific limitation on the protection scope of the present invention in any way. Based on the explanation here, technicians in this field can think of other specific embodiments or equivalent replacements of the present invention without paying creative work, which will fall within the protection scope of the present invention.

Claims

1. A highly wear-resistant polyetheretherketone composite material for gears, characterized in that: It is composed of the following materials by mass percentage:

2. The highly wear-resistant polyetheretherketone composite material for gears according to claim 1, characterized in that: The polyetheretherketone was purchased from Victrex, model: 450G; the thermoplastic polyimide was purchased from Saudi Sabic, model: EXTEMXH1015; the graphene oxide was purchased from Jiangsu Xianfeng Nanomaterial Technology Co., Ltd., model: XFSG01; the antioxidant was Irganox 1098 from BASF; and the aramid fiber was AF1414 chopped aramid fiber from DuPont.

3. The highly wear-resistant polyetheretherketone composite material for gears according to claim 1, characterized in that: It adopts 60 parts of polyetheretherketone, 20 parts of thermoplastic polyimide, 9.5 parts of graphene oxide, 10 parts of modified aramid fiber and 0.5 parts of antioxidant; Or, using 70 parts of polyetheretherketone, 10 parts of thermoplastic polyimide, 9 parts of graphene oxide, 10 parts of modified aramid fiber, and 1 part of antioxidant; Or, using 65 parts of polyetheretherketone, 15 parts of thermoplastic polyimide, 5 parts of graphene oxide, 14.5 parts of modified aramid fiber, and 0.5 parts of antioxidant; Or, using 55 parts of polyetheretherketone, 25 parts of thermoplastic polyimide, 9.2 parts of graphene oxide, 10 parts of modified aramid fiber, and 0.8 parts of antioxidant; Or, 55 parts of polyetheretherketone, 10 parts of thermoplastic polyimide, 9.5 parts of graphene oxide, 25 parts of modified aramid fiber, and 0.5 parts of antioxidant are used.

4. A method for preparing the highly wear-resistant polyetheretherketone composite material for gears according to any one of claims 1 to 3, characterized in that: The following steps are involved: S100: weighing various raw materials according to the formula, and drying the weighed polyetheretherketone and thermoplastic polyimide; S200: mixing the polyetheretherketone, thermoplastic polyimide and antioxidant dried in step S100 in a high-speed mixer for 5 minutes and then melt-extruding to form a polyetheretherketone alloy material; S300: The polyetheretherketone alloy material in step S200 is mixed with other raw materials in a high-speed mixer for 10 minutes, and then melt-extruded to form a polyetheretherketone composite material.

5. The method for preparing a highly wear-resistant polyetheretherketone composite material for gears according to claim 4, characterized in that: The drying process in step S100 is performed at a temperature of 150-170° C. and a drying time of 4-8 hours.

6. The method for preparing a highly wear-resistant polyetheretherketone composite material for gears according to claim 5, characterized in that: The melt extrusion operation in step S200 and step S300 is carried out in an extruder, and the temperatures of each section in the extruder are: 320-350°C in zone 1, 350-370°C in zone 2, 370-380°C in zone 3, 380-390°C in zone 4, 380-390°C in zone 5, 380-390°C in zone 6, 380-390°C in zone 7, 380-390°C in zone 8, 370-380°C in zone 9, 370-380°C in zone 10, and 395-400°C in zone 11, wherein the screw aspect ratio is 36-48, and the screw speed is 200-500rpm.

7. The method for preparing a highly wear-resistant polyetheretherketone composite material for gears according to claim 4, characterized in that: The modified aramid fiber is prepared by the following steps, including: Step 1: firstly oxidizing the aramid fiber with acid to obtain oxidized aramid fiber; Step 2: reacting the oxidized aramid fiber with a silane coupling agent to prepare the modified aramid fiber, wherein the acid is a 30% phosphoric acid aqueous solution, and the mass ratio of the silane coupling agent to the oxidized aramid fiber is 1:200-800.

8. The method for preparing a highly wear-resistant polyetheretherketone composite material for gears according to claim 7, characterized in that: In the step 1, the aramid fiber is firstly cleaned with acetone, ultrasonically dispersed, and then rinsed with clean water 3-5 times and dried after 4-6 hours; then the dried aramid fiber is immersed in a phosphoric acid aqueous solution, ultrasonically dispersed at 60-80° C., and after 30-120 minutes, rinsed with distilled water 3-5 times and vacuum dried at 80-100° C.

9. The method for preparing a highly wear-resistant polyetheretherketone composite material for gears according to claim 8, characterized in that: In the step 2, the aramid fiber treated in the step 1 is immersed in a solution of silane coupling agent KH550, ethanol and distilled water in a ratio of 25:65:10, and ultrasonically dispersed. After 4-24 hours, it is rinsed with distilled water for 3-5 times, and vacuum dried at 80-100° C. to prepare modified aramid fiber for standby use.

10. A gear, characterized in that: The gear is made of the highly wear-resistant polyetheretherketone composite material as claimed in any one of claims 1 to 3.

Images