A high-strength low-friction wear-resistant resin-based composite material, a preparation method and use thereof

Abstract

This invention provides a high-strength, low-friction, wear-resistant resin-based composite material, its preparation method, and its applications, belonging to the field of composite materials. This invention uses irradiated modified polytetrafluoroethylene (PTFE) nanoparticles as a solid lubricant and utilizes multi-scale short-cut carbon fibers to fill a PPS composite material, constructing a dense filler-reinforced network structure. This results in a composite material with excellent mechanical and thermal conductivity properties, while also exhibiting excellent low-friction and wear-resistant functionality. The high-strength, low-friction, wear-resistant resin-based composite material of this invention has very broad application prospects in aerospace, transportation, electronic devices, and high-end mechanical equipment, and can be used to prepare wear-resistant bearings, self-lubricating parts, mechanical gaskets, and other components for use under dry friction and other application conditions.

Description

Technical Field

[0001] This invention belongs to the field of composite materials, specifically relating to a high-strength, low-friction, wear-resistant resin-based composite material, its preparation method, and its applications. Background Technology

[0002] As is well known, friction and wear are ubiquitous in daily life and industrial production. In some cases, friction plays a crucial role in the normal operation of mechanical systems; however, periodic friction often leads to severe energy loss and material wear, significantly shortening the service life of mechanical equipment and related components. Therefore, reducing adverse friction and wear in various forms and improving the self-lubricating and wear-resistant properties of materials have become important measures for saving energy and improving the reliability of mechanical equipment. Currently, resin-based composite materials have advantages such as light weight, low cost, high specific strength, and ease of processing and molding, leading to their gradual replacement of materials such as metals and ceramics in many fields, especially in tribology, where they are widely used in applications such as gears, bearings, pulleys, and medical devices.

[0003] Polyphenylene sulfide (PPS) is a linear thermoplastic resin with high rigidity and high crystallinity, considered the sixth largest specialty engineering plastic. Due to its excellent thermodynamic properties, electrical properties, dimensional stability, and chemical resistance, PPS and its composites are widely used in aerospace, transportation, mechanical components, electronic devices, and household appliances. However, PPS itself has a high coefficient of friction (0.45-0.57) and a high wear rate (3.55 × 10⁻⁶). -3 mm 3 The components made from PPS (polypropylene oxide) are prone to severe friction and wear under extreme loads and frequent start-stop operations during use, making them unsuitable for the application requirements of friction structures in mechanical equipment. Therefore, improving the friction and wear properties of PPS to prepare high-strength, low-friction, and wear-resistant functional composite materials and components has significant scientific value and application prospects.

[0004] To promote the application of PPS and its composites in mechanical engineering, scholars at home and abroad have made numerous attempts to modify its friction and wear properties. However, most current technical methods neglect the thermodynamic properties of the materials and their tribological properties under extreme load conditions, resulting in the materials failing to meet the performance requirements of mechanical equipment parts in practical applications. For example, patent application CN115785671A discloses an aerogel / polyphenylene sulfide self-lubricating friction material and its preparation method. This invention uses aerogel, reinforcing fibers, and liquid phase additives to mix and fill PPS for modification, but its improvement on self-lubricating performance is limited (the lowest coefficient of friction is 0.178), and its mechanical strength and thermal conductivity are not ideal. Patent application CN113337130A discloses an isolation network composite material containing hybrid nanofillers, its preparation method, and its applications. This invention utilizes the self-polymerization of dopamine or the copolymerization of dopamine polyetherimide to co-deposit grafted carbon nanotubes on the surface of PPS, and then encapsulates silicon carbide nanoparticles to prepare a PPS-based composite material with high thermal conductivity. This significantly reduces the frictional temperature, thereby alleviating the frictional wear of PPS. However, this method has limited improvement on the tribological properties of PPS (the lowest coefficient of friction is 0.193, and the specific wear rate is 2.50 × 10⁻⁶). -5 mm 3 Patent application CN109370220A discloses a graphene-modified polyphenylene sulfide (PPS) composite material and its preparation method. This invention mainly uses graphene powder, basalt fiber, curing agent, and vulcanizing agent to modify PPS. This method significantly reduces the friction coefficient and wear rate of PPS, but its poor mechanical strength makes it difficult to play a role in practical applications. Therefore, developing a self-lubricating and wear-resistant resin-based composite material with both excellent mechanical strength and high thermal conductivity, and its preparation method, has significant scientific value and application prospects. Summary of the Invention

[0005] The purpose of this invention is to provide a high-strength, low-friction, wear-resistant resin-based composite material, its preparation method, and its applications.

[0006] This invention provides a high-strength, low-friction, wear-resistant resin-based composite material, which is prepared from the following raw materials in parts by weight: 10-200 parts of resin matrix, 5-80 parts of solid lubricant, and 1-60 parts of carbon fiber; wherein the carbon fiber includes carbon fiber A and carbon fiber B, carbon fiber A has an average length of 0.1-3 mm and an average diameter of 1-20 μm, and carbon fiber B has an average length of 1-20 mm and an average diameter of 1-20 μm.

[0007] Furthermore, the high-strength, low-friction, wear-resistant resin-based composite material is prepared from the following raw materials in parts by weight: 20-100 parts of resin matrix, 10-50 parts of solid lubricant, and 10-40 parts of carbon fiber; the carbon fiber is composed of carbon fiber A and carbon fiber B, wherein the weight ratio of carbon fiber A to carbon fiber B is (1-3):(1-3).

[0008] Furthermore, the high-strength, low-friction, wear-resistant resin-based composite material is prepared from the following raw materials in parts by weight: 56 parts resin matrix, 24 parts solid lubricant, and 20 parts carbon fiber; the carbon fiber is composed of carbon fiber A and carbon fiber B, wherein the weight ratio of carbon fiber A to carbon fiber B is 1:3.

[0009] Furthermore, the carbon fiber A has an average length of 0.2-1 mm and an average diameter of 2-10 μm, and the carbon fiber B has an average length of 2-10 mm and an average diameter of 2-10 μm.

[0010] Furthermore, the carbon fiber A has an average length of 0.3 mm and an average diameter of 6 μm, while the carbon fiber B has an average length of 3 mm and an average diameter of 7 μm.

[0011] Furthermore, the resin matrix is ​​a thermoplastic resin; the solid lubricant is polytetrafluoroethylene or its derivatives; and the carbon fiber is polyacrylonitrile-based or pitch-based short-cut carbon fiber.

[0012] Furthermore, the resin matrix is ​​polyphenylene sulfide; the polytetrafluoroethylene derivative is irradiated modified polytetrafluoroethylene; and the carbon fiber is polyacrylonitrile-based short-cut carbon fiber.

[0013] This invention also provides a method for preparing the above-mentioned high-strength, low-friction, and wear-resistant resin-based composite material, which includes the following steps: drying and premixing the raw materials, followed by melt blending. The high-strength, low-friction, and wear-resistant resin-based composite material prepared by the above method can be processed using conventional thermoplastic processing methods such as hot pressing, calendering, and (micro)injection molding.

[0014] Furthermore, the molding process is injection molding.

[0015] This invention also provides applications of the above-mentioned high-strength, low-friction polymer wear-resistant resin-based composite materials in aerospace, transportation, electronic devices, and high-end mechanical equipment.

[0016] The aforementioned high-strength, low-friction, wear-resistant resin-based composite materials can be used to prepare wear-resistant bearings, self-lubricating parts, mechanical gaskets, and other components for use under dry friction and other working conditions.

[0017] Compared with existing technologies, this invention achieves the following beneficial effects: This invention uses irradiated modified polytetrafluoroethylene nanopowder as a solid lubricant, and utilizes multi-scale short-cut carbon fibers to fill the PPS composite material to construct a dense filler-reinforced network. This results in a composite material with excellent mechanical and thermal conductivity properties, while simultaneously promoting the formation of a high-lubrication transfer film on the surface of mating parts, thus exhibiting excellent tribological properties under various PV operating conditions. The high-strength, low-friction, wear-resistant resin-based composite material of this invention has broad application prospects in aerospace, transportation, electronic devices, and high-end mechanical equipment, and can be used to prepare wear-resistant bearings, self-lubricating parts, mechanical gaskets, and other components used under dry friction and other operating conditions.

[0018] Obviously, based on the above description of the present invention, and according to common technical knowledge and conventional methods in the field, various other modifications, substitutions or alterations can be made without departing from the basic technical concept of the present invention.

[0019] The following detailed embodiments further illustrate the above-described content of the present invention. However, this should not be construed as limiting the scope of the present invention to the following examples. All technologies implemented based on the above-described content of the present invention fall within the scope of the present invention. Attached Figure Description

[0020] Figure 1 Morphological images of (A) i-PTFE, (B) PSCF and (C) SCF.

[0021] Figure 2 The brittle fracture morphology of (A) P / i-PTFE, (B) P / i-PTFE / PS20, (C) P / i-PTFE / PS15-S5, (D) P / i-PTFE / PS10-S10, (E) P / i-PTFE / PS5-S15, and (F) P / i-PTFE / S20 composite materials.

[0022] Figure 3 (A) Flexural properties, (B) Tensile strength and surface hardness of various resin-based composite materials.

[0023] Figure 4 (A) Instantaneous friction coefficient, (B) Average friction coefficient and specific wear rate of each resin-based composite material.

[0024] Figure 5 Wear surface morphology of (A) P / i-PTFE, (B) P / i-PTFE / P20, (C) P / i-PTFE / PS15-S5, (D) P / i-PTFE / PS10-S10, (E) P / i-PTFE / PS5-S15 and (F) P / i-PTFE / S20 composite materials.

[0025] Figure 6 3D morphology images of wear tracks of composite materials of (A) P / i-PTFE, (B) P / i-PTFE / PS20, (C) P / i-PTFE / PS15-S5, (D) P / i-PTFE / PS10-S10, (E) P / i-PTFE / PS5-S15 and (F) P / i-PTFE / S20.

[0026] Figure 7 The (A) instantaneous friction temperature and (B) thermal conductivity of each resin-based composite material.

[0027] Figure 8 (A) Coefficient of friction and (B) Specific wear rate of various resin-based composite materials under high PV conditions. Figure 9 The morphology of the transfer layer on the steel disc surface of (A)P / i-PTFE, (B)P / i-PTFE / P20, (C)P / i-PTFE / PS5-S15 and (D)P / i-PTFE / S20 composite materials in the pin-disc friction and wear test. Detailed Implementation

[0028] The raw materials and equipment used in this invention are all known products, obtained by purchasing commercially available products.

[0029] Polyphenylene sulfide (PPS) powder (density 1.35 g / cm³) 3 The following materials were purchased: i-PTFE (melting temperature 285℃), purchased from Deyang Keji High-Tech Materials Co., Ltd.; irradiated modified polytetrafluoroethylene nanopowder (i-PTFE) (grade JH-305F, particle size 200-300nm), purchased from Sichuan Jinhe Polymer Materials Co., Ltd.; WD-30 type polyacrylonitrile-based short carbon fibers (PSCF, average length 0.3mm, average diameter 6μm) and LSC070-PEEK type polyacrylonitrile-based short carbon fibers (SCF, average length 3mm, average diameter 7μm), both purchased from Shanghai Lishuo Composite Materials Technology Co., Ltd. The microstructures of i-PTFE, PSCF, and SCF are shown in the figure. Figure 1 As shown.

[0030] Example 1: Preparation of the high-strength, low-friction, wear-resistant resin-based composite material of the present invention

[0031] Resin-based composite materials were prepared using a melt blending method, with the following specific procedures: All raw materials were dried at 80±5℃ for 12±0.5h before use. The dried raw materials were premixed according to the proportions shown in Table 1. Then, they were melt-mixed using a co-rotating parallel twin-screw extruder (TSSJ / 25 / 33, Chengdu Shengda Chemical Co., Ltd., China). After uniform plasticization by the extruder, the mixture was cooled and granulated, and then dried in a forced-air drying oven for 12±1h to obtain the final product. The resulting composite material was injection molded. The following high-strength, low-friction, and wear-resistant resin-based composite materials were prepared: P / i-PTFE / PS20, P / i-PTFE / PS15-S5, P / i-PTFE / PS10-S10, P / i-PTFE / PS5-S15, and P / i-PTFE / S20.

[0032] Table 1. Raw material ratio

[0033]

[0034] Note: The 30 parts by weight in Table 1 is 300g.

[0035] The following is the method for preparing the control sample.

[0036] Comparative Example 1: Preparation of Self-Lubricating Resin-Based Composite Materials

[0037] Following the method of Example 1, a self-lubricating resin-based composite material (P / i-PTFE) was prepared according to the raw material ratios shown in Table 1.

[0038] The following experimental examples demonstrate the beneficial effects of the present invention.

[0039] Experimental Example 1: Characterization of the cross-sectional microstructure of various resin-based composite materials

[0040] (1) Experimental methods

[0041] The brittle fracture surfaces of various resin-based composite materials were observed using a scanning electron microscope (SEM) (JSM-9600, Japan).

[0042] (2) Experimental Results

[0043] Figure 2 The cross-sectional microstructures of various resin-based composite materials are shown. For example... Figure 2 As shown in (A), obvious pores and i-PTFE particle agglomerates were observed in P / i-PTFE, indicating that i-PTFE filling creates defects in the composite. Furthermore, the fracture morphology of P / i-PTFE is very smooth, suggesting that the composite exhibits brittle characteristics. Figure 2Images (B-F) show the cross-sectional microstructure of the P / i-PTFE / CFs composite material. The results indicate that carbon fibers (CFs) are randomly dispersed and intertwined within the PPS matrix, forming a "reinforced concrete" type reinforcement structure. Furthermore, voids or traces caused by CFs peeling due to external forces were observed. However, with increasing SCF content, fewer voids or defects were observed on the fracture surface of the P / i-PTFE / CFs composite material. This is because low aspect ratio PSCF forms a loose filler network structure within the composite material, and this loose structure is often disrupted by external forces, resulting in more defects on the fracture surface, especially in P / i-PTFE / PS20. Conversely, with increasing high aspect ratio SCF content, more interpenetrating network structures are formed, which can resist external forces and improve mechanical properties. When the PSCF to SCF ratio is 1:3, the composite material exhibits the fewest defects in its cross-section. This is because a certain amount of PSCF can effectively fill the gaps between SCFs, thereby reducing fiber-depleted areas and resulting in a denser morphology of the polymer matrix under the carbon fiber interpenetrating network.

[0044] Experimental Example 2: Characterization of the mechanical properties of various resin-based composite materials

[0045] (1) Experimental methods

[0046] The mechanical properties of various resin-based composite materials were tested at room temperature using an Instron 5567 universal testing machine (USA). Tensile strength tests were conducted according to GB / T 1040.2-2022 standard, with sample dimensions of 150 × 10 × 4 mm. 3 The test speed was 10 mm / min. Bending performance was tested according to GB / T9341-2008 standard. Sample size: 80×10×4 mm. 3 Test speed: 2mm / min.

[0047] The surface hardness of various resin-based composite materials was tested using a HANDPILX-D Shore hardness tester (HANDPI Instruments Co., Ltd., Yueqing City, China).

[0048] (2) Experimental Results

[0049] Figure 3 The mechanical properties of various resin-based composite materials are shown, including flexural properties, tensile strength, and surface hardness. Figure 3(A) shows that the flexural strength and flexural modulus of the composite material increase significantly with the addition of CFs. When the PSCF / SCF mass ratio is 1:3, both the flexural strength and modulus reach their maximum values. That is, the flexural strength and modulus of P / i-PTFE / PS5-S15 reach 191.1 MPa and 13.7 GPa, respectively, which are 125.6% and 389.3% higher than those of P / i-PTFE. Therefore, hybridization of CFs with different aspect ratios is beneficial to improving the flexural properties of the composite material. Figure 3 (B) shows the tensile strength and surface hardness of resin-based composites containing different CFs. Similar to the flexural properties, the tensile strength of the PPS / i-PTFE / CF composites increases significantly with the addition of CFs, and the tensile strength value continues to increase with increasing SCF content. This is attributed to the better reinforcing effect of high aspect ratio CFs, thereby improving the tensile strength of the composite. Furthermore, Figure 3 (B) shows that the surface hardness of the resin-based composite material is improved after the addition of CFs, which is related to the increased surface hardness caused by the formed entangled CFs network structure. The above experimental results indicate that the mechanical properties and surface hardness of the P / i-PTFE / CFs composite material are improved simultaneously.

[0050] Experimental Example 3: Characterization of the tribological properties of various resin-based composite materials

[0051] (1) Experimental methods

[0052] According to GB / T3960-2016 standard, the tribological properties of various resin-based composite materials were tested using a ring-block friction and wear testing machine (M-200, Beijing Guancheng Experimental Instrument Co., Ltd.) under the conditions of a sliding speed of 0.42 m / s and a load of 200 N. The sample size was 30 × 7 × 6 mm. 3 A 45# steel ring with a surface roughness Ra = 0.8 μm was used as the friction pair. Before testing, the surface of the steel ring was polished with sandpaper, ultrasonically cleaned in acetone, and then naturally dried. Each sample was tested in triplicate. The wear rate of the composite material was measured using a volumetric method, and the test time was 1 hour.

[0053] The formulas for calculating the instantaneous friction coefficient (μ) and specific wear rate (SWR) are as follows:

[0054]

[0055]

[0056]

[0057] Where P is the frictional torque (Nm), F is the applied load (N), r is the radius of the friction pair (mm), and v is the wear volume (mm). 3 ), d is the sample width (mm), w is the wear mark width of the sample after the friction test (mm), and L is the sliding distance (m).

[0058] The microstructure and wear track morphology of the wear surface of the resin-based composite material after friction testing were observed using a scanning electron microscope (JSM-9600, Japan) and a three-dimensional optical profilometer (ContourGT-K, Germany).

[0059] (2) Experimental Results

[0060] Figure 4 (A) shows the relationship between the instantaneous friction coefficient and sliding time for each resin-based composite material. The results indicate that with the addition of CFs, the fractured CFs act as hard abrasives at the sliding interface, leading to instability in the friction coefficient during the early stages of friction. However, the reinforcing filler network structure formed by SCFs makes it difficult to peel off during sliding, which helps reduce the fluctuations in the friction process. Figure 4 As shown in (B), by comparing the average friction coefficient and specific wear rate of P / i-PTFE / PS20 and P / i-PTFE / S20, it was found that PSCFs can effectively reduce the friction coefficient, while SCFs can significantly reduce the specific wear rate. Figure 5 , 6 The observation of the wear surface and wear tracks of the composite material revealed that the former's easy peeling generated debris promoted the formation of a lubricant transfer film, while the latter's high resistance to external forces significantly reduced the degree of material wear. When the filling ratio of PSCFs and SCFs was 1:3, the average coefficient of friction and specific wear rate of the P / i-PTFE / PS5-S15 composite material were as low as 0.142 and 1.63 × 10⁻⁶, respectively. -6 mm 3 / Nm, compared with P / i-PTFE, is improved by 13.9% and 95.5%, respectively, such as Figure 5 , 6 As shown in Table 2, the wear surface of the P / i-PTFE / PS5-S15 composite material is very smooth and exhibits the shallowest and narrowest wear tracks. This is mainly due to the synergistic and complementary effect between the CFs with different aspect ratios within it, forming a complete reinforcing network structure that helps improve the mechanical properties and thermal conductivity of the composite material. In addition, the graphite layer formed by the low aspect ratio PSCFs and the low surface energy i-PTFE have a synergistic lubricating effect, thereby greatly improving the tribological properties of the composite material.

[0061] Table 2. Width of wear marks (R) for various resin-based composite materials d ) and depth (R) v )

[0062] P / i-PTEF 6927 318 P / i-PTFE / PS20 4292 99 P / i-PTFE / PS15-S5 6630 412 P / i-PTFE / PS10-S10 3677 117 P / i-PTFE / PS5-S15 2652 29 P / i-PTFE / S20 2823 33

[0063] Experimental Example 4: Characterization of Frictional Heat and Thermal Conductivity of Various Resin-Based Composite Materials

[0064] (1) Experimental methods

[0065] Frictional heat was characterized by real-time monitoring of the temperature during the friction test using a multipath thermometer (AT4204, Changzhou Anbai Precision Instruments Co., Ltd., China) equipped with a K-type thermocouple.

[0066] The thermal conductivity of each resin-based composite material was characterized using a HotDisk thermal constant analyzer (2500-OT, Sweden).

[0067] (2) Experimental Results

[0068] Figure 7 (A) shows the temperature change of each resin-based composite sample over time during friction. It can be seen that before 500 s, the friction temperature of all samples increased significantly, which is related to the accumulation of frictional heat during the break-in period. In this case, once the sample block comes into contact with the friction pair, frictional heat begins to be generated and accumulate at the sliding interface, leading to an instantaneous increase in the sample's friction temperature. The P / i-PTFE composite material exhibits the highest friction temperature, indicating that it may experience significant frictional resistance during the friction test, resulting in a large amount of frictional heat. Figure 7 (B) It can be seen that P / i-PTFE has the lowest thermal conductivity (0.27 W / mK). Therefore, the large amount of frictional heat generated by the material during the test cannot be effectively dispersed, resulting in its accumulation on the friction contact surface over a long period of time. This causes the polymer to soften to a certain extent and its mechanical strength to decrease, resulting in severe surface wear, which corresponds to its high friction coefficient and specific wear rate. Among them, the P / i-PTFE / PS5-S15 composite material has the lowest frictional temperature during the friction process. This is attributed to the following factors: (1) Compared with other sample blocks, P / i-PTFE / PS5-S15 has a higher thermal conductivity (0.62 W / mK), which is 129.63% higher than that of P / i-PTFE. This is beneficial for dissipating frictional heat during sliding, thereby avoiding the aggravation of wear; (2) Good transfer film formation reduces the direct contact between the composite material and the friction pair, thereby reducing the frictional power consumption of the sliding interface.

[0069] Experimental Example 5: Tribological Properties Testing of Various Resin-Based Composites at High PV

[0070] (1) Experimental methods

[0071] The tribological properties of various resin-based composite materials were tested using a self-made pin-disc friction and wear testing device under the conditions of a sliding speed of 2 m / s and a load of 200 N (PV≥10 MPa·m / s). The wear of the materials was measured by weighing, and the test time was 210 s. After each test, the surface of the steel disc was sanded again and cleaned with acetone. The test was then conducted again after the disc had returned to room temperature.

[0072] The PV value refers to the product of the unit load P on the contact area between the material and the friction device and the relative sliding linear velocity V, which is used to approximately measure the severity of the material friction test conditions.

[0073] (2) Experimental Results

[0074] Figure 8 (A) and (B) show the coefficient of friction and wear rate of each resin-based composite material evaluated using a self-made pin-disc friction and wear testing apparatus. The tribological performance test at high PV lasted for 210 s, divided into five test cycles, each lasting 42 s. Figure 8 As shown in (A), the coefficient of friction for all samples decreased with increasing test cycles under high PV, which is related to the gradual formation of a transfer film on the steel disc surface. Similar to the ring-block tribology test, the P / i-PTFE / PS5-S15 composite material exhibited the lowest coefficient of friction and wear rate under high PV throughout the entire study system. Figure 9 Optical images of the grinding disc after testing are provided. The transfer film formed by P / i-PTFE / PS5-S15 at the sliding interface is more uniform, indicating that adding CFs with different aspect ratios has a synergistic effect on improving the self-lubricating properties of the composite material. In addition, the improvement of the thermal conductivity and mechanical properties of the composite material can also improve the tribological properties of the material under high PV.

[0075] In summary, the high-strength, low-friction, wear-resistant resin-based composite material of the present invention possesses excellent mechanical strength, thermal conductivity, and wear resistance, and has broad application prospects in aerospace, transportation, electronic devices, and high-end mechanical equipment.

Claims

1. A high-strength, low-friction, wear-resistant resin-based composite material, characterized by, It is prepared from the following raw materials in parts by weight: 56 parts resin matrix, 24 parts solid lubricant, and 20 parts carbon fiber; the resin matrix is ​​polyphenylene sulfide, the solid lubricant is irradiated modified polytetrafluoroethylene, and the carbon fiber is polyacrylonitrile-based short-cut carbon fiber; the carbon fiber is composed of carbon fiber A and carbon fiber B, wherein the weight ratio of carbon fiber A to carbon fiber B is 1:3, the average length of carbon fiber A is 0.2-1 mm, the average diameter is 2-10 μm, and the average length of carbon fiber B is 2-10 mm, and the average diameter is 2-10 μm.

2. The high-strength, low-friction, wear-resistant, resin-based composite material of claim 1, wherein, The carbon fiber A has an average length of 0.3 mm and an average diameter of 6 μm, while the carbon fiber B has an average length of 3 mm and an average diameter of 7 μm.

3. A method of making the high-strength, low-friction, wear-resistant resin-based composite material of any one of claims 1-2, characterized in that, The method The process includes the following steps: drying and premixing the raw materials, followed by melt blending to obtain the final product.

4. The application of the high-strength, low-friction, wear-resistant resin-based composite material according to any one of claims 1-2 in the fields of aerospace, transportation, electronic devices, and high-end mechanical equipment.

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