Highly wear-resistant carbon nanotube fiber composite fabric friction material, method for preparing the same, and use thereof

Abstract

The application provides a high-wear-resistance carbon nanotube fiber composite fabric friction material, a preparation method and application thereof. The high-wear-resistance carbon nanotube fiber composite fabric friction material comprises a main body structure, a graphite deposition layer and a thermosetting resin; the main body structure is formed by braiding carbon nanotube fibers, the graphite deposition layer is distributed on the surface of the carbon nanotube fibers, and the thermosetting resin is filled between the carbon nanotube fibers. Based on the self-lubricating property, high thermal conductivity and high strength of the carbon nanotube and the excellent lubricating property and high thermal conductivity of the graphite, the nanometer graphite powder is deposited on the plain carbon nanotube fiber fabric, and the resin is used for bonding, and the resin also plays a role in reducing wear; the prepared material can solve the problems of limited temperature application range and poor bonding force of traditional materials, and exhibits excellent wear resistance under high-temperature and high-load conditions.

Description

Technical Field

[0001] This invention belongs to the field of wear-resistant materials technology, specifically relating to a high wear-resistant carbon nanotube fiber composite fabric friction material, its preparation method and application. Background Technology

[0002] Self-lubricating bearings are mechanical components that achieve oil-free or low-oil lubrication using solid lubricating materials. They bear loads through a metal matrix, while the solid lubricant forms a transfer film to reduce friction. They are characterized by good wear resistance, low coefficient of friction (with similar static and dynamic coefficients), high load-bearing capacity, and thin-walled, lightweight construction. As the nation's strategic deployment for high-end equipment manufacturing capabilities continues to deepen, fields such as aerospace and new energy equipment are rapidly evolving towards high power and extreme operating conditions. As a core functional component of key basic parts such as spherical plain bearings, polymer-based fabric composite gaskets face increasingly harsh operating environments—requiring long-term reliable service under extreme conditions such as high temperatures (>300℃) and high loads. Due to the excellent self-lubricating ability of polytetrafluoroethylene (PTFE) (coefficient of friction of 0.05), it is often blended with high-strength fibers such as aramid fibers and then impregnated and cured with high-temperature resistant resin to prepare composite materials, which are widely used in industrial equipment such as self-lubricating spherical plain bearings. However, limited by the thermal decomposition temperature of aramid fibers (approximately 400 °C) and the melting point of PTFE (327 °C), thermal degradation and structural failure easily occur when the temperature exceeds 260 °C, making it unsuitable for the urgent needs of next-generation high-end equipment. Therefore, developing novel gasket materials that combine ultra-high temperature stability, high strength load-bearing capacity, and excellent wear-resistant and friction-reducing properties has become crucial for overcoming the technological bottleneck of self-lubricating spherical plain bearings.

[0003] Carbon nanotubes have a thermal conductivity of 3000-3500 W / m at room temperature. -1 K -1It also has a theoretical strength of 100 GPa - 200 GPa. Carbon nanotube fibers are composed of a large number of one-dimensional carbon nanotubes densely arranged along the axis. They not only inherit the excellent thermal and mechanical properties of single carbon nanotubes, but also exhibit good flexibility, weavability and macroscopic structural designability. In addition, carbon nanotube fibers can degrade during friction to form a lubricating graphite friction layer, which provides a key material basis for constructing high-performance fabric pads. Most of the relevant research on the application of carbon nanotubes in the field of friction focuses on composite materials with carbon nanotubes as the reinforcing phase. Sandeep Agrawal et al. studied the addition of carbon nanotubes to glass fiber fabric reinforced epoxy resin composite materials. Through the reinforcing effect, self-lubricating properties and high thermal conductivity of CNTs, the coefficient of friction can be reduced by 13-20%, specific wear rate by 6-13% and weight loss by 12-18% in three environments: dry friction, oil lubrication and inert gas (Materials, 2021, 14(11): 2965.). Research on carbon nanotube fiber fabrics is extremely limited. Luo Xiaogang et al. used an automatic weft knitting machine to weave CNT fiber fabrics and studied their electrical and thermal conductivity, but did not conduct tribological tests (Journal of Materials Chemistry A, 2019, 7(15): 8790-8797.). The study found that the thermal conductivity of carbon nanotube fiber fabrics reached 0.13 W / (m·K), which is higher than that of commonly used PTFE / aramid fiber fabrics. Graphite is a commonly used reinforcing material in the field of tribology. It has a low coefficient of friction and can be used as a solid lubricant, making the material a self-lubricating composite material. Grzegorz Hajdukiewicz et al. studied the effect of graphite content on the structural properties of polyester-glass recycled composite materials, proving that the addition of 10% graphite completely changed the wear mechanism from "mixed abrasive-adhesive wear" to "pure abrasive wear", completely eliminating the formation and shedding cycle of adhesive deposits and reducing the coefficient of friction (Materials, 2025, 18(2): 376.).

[0004] Existing research on the tribological properties of carbon nanotubes and graphite has demonstrated the excellent properties of these materials. Currently, most studies use carbon nanotubes as functional materials to be added to composite materials to improve tribological properties. However, there is very little research on the tribological properties of carbon nanotube fiber fabrics, which cannot achieve long-term stable friction under high temperature and high load conditions. This makes it difficult to solve the problem that existing materials cannot be used stably for a long time under extreme working conditions. Summary of the Invention

[0005] The main objective of this invention is to provide a high wear-resistant carbon nanotube fiber composite fabric friction material, its preparation method and application, so as to overcome the shortcomings of the prior art.

[0006] To achieve the above-mentioned objectives, the present invention adopts the following technical solution: In a first aspect, the present invention provides a high wear-resistant carbon nanotube fiber composite fabric friction material for high temperature and high load-bearing environments, which includes a main structure, a graphite deposition layer and a thermosetting resin. The main structure is woven from carbon nanotube fibers, the graphite deposition layer is distributed on the surface of the carbon nanotube fibers, and the thermosetting resin is filled between the carbon nanotube fibers.

[0007] Secondly, the present invention also provides a method for preparing the above-mentioned high wear-resistant carbon nanotube fiber composite fabric friction material, comprising: Carbon nanotube fibers are woven together to form the main structure; A graphite dispersion was prepared, and the main structure was used as a filter material. The graphite dispersion was filtered and the main structure was dried to form a graphite deposition layer on the surface of the carbon nanotube fibers, thereby obtaining a composite fabric. A thermosetting resin solution is prepared, the composite fabric is immersed in the thermosetting resin solution, and then dried to obtain a resin-containing fabric. The resin-containing fabric is subjected to hot pressing treatment to cure the thermosetting resin and densify the resin-containing fabric, thereby obtaining a high wear-resistant carbon nanotube fiber composite fabric friction material.

[0008] Compared with the prior art, the beneficial effects of the present invention include at least the following: Based on the self-lubricating properties, high thermal conductivity, and high strength of carbon nanotubes, as well as the excellent lubrication properties and high thermal conductivity of graphite, this invention deposits nano-graphite powder onto plain-weave carbon nanotube fiber fabric and uses resin for bonding. At the same time, the resin also plays a role in reducing friction. The prepared material can solve the problems of limited temperature application range and poor bonding force of traditional materials, and exhibits excellent wear resistance under high temperature and high load conditions.

[0009] The above description is merely an overview of the technical solution of the present invention. In order to enable those skilled in the art to better understand the technical means of this application and to implement it in accordance with the contents of the specification, the preferred embodiments of the present invention are described below in conjunction with detailed drawings. Attached Figure Description

[0010] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0011] Figure 1 This is a schematic diagram of the preparation process of a high wear-resistant carbon nanotube fiber composite fabric friction material provided in a typical embodiment of the present invention; Figure 2 This is a friction principle diagram of a high wear-resistant carbon nanotube fiber composite fabric friction material provided in a typical embodiment of the present invention; Figure 3 This is a low-magnification electron microscope image of a cut portion of a carbon fiber fabric provided in an embodiment of the present invention. Figure 4 This is a high-magnification electron microscope image of a cut portion of a carbon fiber fabric provided in an embodiment of the present invention; Figure 5 This is a low-magnification electron microscope image of a cut portion of a carbon nanotube fiber fabric provided in an embodiment of the present invention; Figure 6 This is a high-magnification electron microscope image of a cut portion of a carbon nanotube fiber fabric provided in an embodiment of the present invention; Figure 7 This is a mechanical tensile test diagram of carbon nanotube fibers after treatment at different temperatures, provided in an embodiment of the present invention. Figure 8 This is a test graph showing the load retention rate of carbon nanotube fibers after treatment at different temperatures, provided in an embodiment of the present invention. Figure 9 This is a tensile test image of carbon nanotube fibers after pressure treatment, provided in an embodiment of the present invention. Figure 10 This is a test diagram of the load retention rate of carbon nanotube fibers after pressure treatment according to an embodiment of the present invention; Figure 11 This is a test chart of tensile data of aramid fiber after treatment at different temperatures, provided by an embodiment of the present invention; Figure 12 This is a test chart of the load retention rate of aramid fibers after treatment at different temperatures, provided in an embodiment of the present invention. Figure 13 This is a tensile test image of aramid fiber after pressure treatment according to an embodiment of the present invention; Figure 14 This is a test chart of the load retention rate of aramid fibers after pressure treatment according to an embodiment of the present invention; Figure 15 These are electron microscope images at different magnifications of carbon nanotube fiber fabrics, composite fabrics, and high wear-resistant carbon nanotube fiber composite fabric friction materials provided in an embodiment of the present invention. Figure 16 This is a comparative test chart of friction data between the original carbon nanotube fiber fabric and the graphite-deposited carbon nanotube fiber fabric provided in an embodiment of the present invention under conditions of 400 N and 0.5 m / s. Figure 17 This is a comparative test chart of friction data between graphite layer deposited carbon nanotube fiber fabric and resin impregnated composite material provided in an embodiment of the present invention under conditions of 400 N and 0.5 m / s. Figure 18 This is a comparative test chart of friction data of the composite material provided in an embodiment of the present invention at 400 N and different speeds; Figure 19 This is a comparative test chart of friction data of the composite material provided in an embodiment of the present invention under different loads at 0.5 m / s. Figure 20 This is a comparative test chart of friction data of carbon nanotube fiber fabric composite materials after different temperature treatments provided in an embodiment of the present invention under conditions of 400 N and 0.5 m / s. Detailed Implementation

[0012] Existing fabric gaskets still suffer from bottlenecks such as rapid lubrication failure and short service life under extreme operating conditions, specifically manifested as follows: (1) Limited application conditions due to the limitations of fabric fiber properties: Polytetrafluoroethylene (PTFE) and its composites are widely used due to their excellent self-lubricating ability. However, PTFE has a melting point of 327℃ and an applicable temperature range of only 4-540 K. Under high temperature conditions, PTFE / reinforcing fiber fabrics will peel off rapidly, resulting in the reinforcing fibers being exposed and severely worn. In aviation, heavy-duty or high-frequency vibration conditions, commonly used padding materials such as PTFE / Kevlar are prone to fiber breakage and tearing, leading to rapid wear of the padding and subsequent bearing failure.

[0013] (2) Interface bonding problems lead to unstable transfer film: The interface bonding between PTFE and reinforcing fiber is unstable, and the PTFE surface is smooth and lacks active reaction sites, resulting in poor wetting and weak bonding strength between the woven fabric and the resin matrix, ultimately failing to give full play to the excellent overall performance of the fabric padding material.

[0014] In view of the shortcomings of the prior art, the inventors of this invention, through long-term research and extensive practice, have proposed the technical solution of this invention. The following will further explain and illustrate this technical solution, its implementation process, and its principles.

[0015] Many specific details are set forth in the following description in order to provide a full understanding of the invention. However, the invention may also be practiced in other ways different from those described herein, and therefore the scope of protection of the invention is not limited to the specific embodiments disclosed below.

[0016] Based on the above issues, see Figure 1As shown, the main technical concept of this invention is to use carbon nanotube fibers as warp and weft threads, weave them into a fabric in a plain weave, deposit a graphite functional layer using a vacuum filtration process, and bond it using a vacuum impregnation thermosetting resin, ultimately obtaining a gasket material with excellent wear resistance under high temperature and high load conditions.

[0017] Based on the above technical concept, the present invention first provides a high wear-resistant carbon nanotube fiber composite fabric friction material for high temperature and high load-bearing environments, which includes a main structure, a graphite deposition layer and a thermosetting resin; the main structure is woven from carbon nanotube fibers, the graphite deposition layer is distributed on the surface of the carbon nanotube fibers, and the thermosetting resin is filled between the carbon nanotube fibers.

[0018] The carbon nanotube fibers used in this invention have high thermal conductivity and high heat resistance, solving the problem that PTFE and other fibers cannot be used at high temperatures due to their inherent properties. The carbon nanotube fibers also have self-lubricating and high strength properties, solving the problem of unstable bonding between two different fibers. The carbon nanotube fibers are composed of a large number of one-dimensional carbon nanotubes densely arranged along the axial direction, which have reactive sites, solving the problem of weak bonding strength with resin. Finally, they exhibit excellent performance in high-temperature and high-load friction tests.

[0019] Figure 2 A schematic diagram illustrating the friction principle of the aforementioned high-wear-resistant carbon nanotube fiber composite fabric friction material is shown. In the diagram, the carbon nanotube fibers undergo structural rearrangement during friction, forming carbon debris. This debris, under frictional heat and shear force, forms a carbon film. The carbon film then binds to the grinding ring via van der Waals forces, forming a transfer film. This transfer film transforms the friction between the carbon nanotube fiber fabric and the grinding ring into friction between the carbon nanotube fiber fabric and the carbon film, thereby reducing the coefficient of friction.

[0020] Regarding the specific structural features, in some implementations, the graphite deposition layer is composed of spherical nano-graphite powder.

[0021] In some embodiments, the spherical nanographite powder has a particle size of 100-200 nm, and the carbon nanotube fibers are carbon nanotube fused bundles with a diameter of 100-300 μm.

[0022] In some embodiments, the mass ratio of the carbon nanotube fibers, the graphite deposited layer, and the thermosetting resin is (60-75):(5-10):(20-30).

[0023] In some embodiments, the thermosetting resin includes any one or a combination of two of phenolic resin and epoxy resin.

[0024] This invention also provides a method for preparing the high wear-resistant carbon nanotube fiber composite fabric friction material provided in any of the above embodiments, which includes the following steps: Carbon nanotube fibers are woven together to form the main structure; A graphite dispersion was prepared, and the main structure was used as a filter material. The graphite dispersion was filtered and the main structure was dried to form a graphite deposition layer on the surface of the carbon nanotube fibers, thereby obtaining a composite fabric. A thermosetting resin solution is prepared, the composite fabric is immersed in the thermosetting resin solution, and then dried to obtain a resin-containing fabric. The resin-containing fabric is subjected to hot pressing treatment to cure the thermosetting resin and densify the resin-containing fabric, thereby obtaining a high wear-resistant carbon nanotube fiber composite fabric friction material.

[0025] As a typical example of the above technical solution, the preparation method provided by the present invention can weave carbon nanotube fibers in a plain weave, deposit a functional graphite layer on them, and then use phenolic resin to bond and prepare composite materials to achieve frictional applications under high temperature and high load.

[0026] Existing studies on the tribological properties of carbon nanotubes and graphite have demonstrated their excellent friction-reducing and wear-resistant characteristics. Currently, most studies use carbon nanotubes as functional fillers dispersed in polymer-based composite materials to improve tribological properties, but research on the tribological properties of carbon nanotube fiber fabrics is extremely limited. In a typical embodiment of this invention, carbon nanotube fibers are woven in a plain weave to form a fabric skeleton. A multi-scale lubrication structure is constructed by depositing a functional graphite layer on its surface, and then a composite material is prepared by bonding with phenolic resin, thereby obtaining a wear-resistant material with the structural characteristics described above.

[0027] Regarding specific preparation conditions, in some embodiments, the concentration of the graphite dispersion is 1-8 mg / ml.

[0028] In some embodiments, the thermosetting resin in the thermosetting resin solution has a mass fraction of 1-25%.

[0029] In some embodiments, the preparation method specifically includes the following steps: The process of repeatedly immersing the composite fabric in the thermosetting resin solution and then drying it is repeated until the mass fraction of the composite fabric in the resin-containing fabric is 70-80%.

[0030] In some embodiments, the hot pressing treatment is performed at a temperature of 150-200 °C for 1-4 h and a pressure of 0.5-2.5 MPa.

[0031] This invention also provides the application of the high wear-resistant carbon nanotube fiber composite fabric friction material provided in any of the above embodiments in the fields of aerospace, heavy machinery, and new energy equipment.

[0032] The technical solution of the present invention will be further described in detail below through several embodiments and in conjunction with the accompanying drawings. However, the selected embodiments are only for illustrating the present invention and do not limit the scope of the present invention.

[0033] Example 1 This embodiment illustrates the preparation process of a high wear-resistant carbon nanotube fiber composite fabric friction material, as detailed below: Carbon nanotube fibers are woven into a plain weave fabric with a surface density of 0.02 g / cm³. 2 The carbon nanotube fibers used were prepared by floating chemical catalytic vapor deposition and fabricated into fused fibers using a fused fiber bundle method disclosed by the team. The single filament diameter was 20-80 μm, and the fused fiber bundle diameter was 100-300 μm. Spherical graphite nanoparticles with a size of 200 nm (Shanghai Aladdin Biochemical Technology Co., Ltd.; model: G103922-25g) were selected to prepare a 5 mg / ml graphite-DMF dispersion. The dispersion was then vacuum-filtered to deposit the graphite onto carbon nanotube fibers, followed by vacuum drying at 80°C. Vacuum drying was used to ensure a tighter bond between the graphite and the fabric; drying at ambient pressure would cause severe graphite agglomeration. Preparation of resin solution: Phenolic resin (Guangdong Kona Chemical Reagent Co., Ltd.; model: 2130 phenolic resin) was dissolved in a mixed solvent (acetone, ethanol and ethyl acetate, volume ratio 1:1:1) by ultrasonic dispersion, with a phenolic resin to mixed solvent mass ratio of 1:6.

[0034] The prepared graphite / carbon nanotube fiber fabric was immersed in the resin mixture under vacuum for 20 minutes, then dried in an oven at 80°C. This process of immersion and drying was repeated until the weight fraction of the mixed fabric in the composite material reached 70-80%. Vacuum impregnation with resin also aims to improve the bonding between the resin and the fabric. Air is removed, allowing the liquid to be "forced" into the fabric gaps.

[0035] The above materials were placed in a hot press and hot-pressed at 10 kg force and 170°C for 2 hours to form a high wear-resistant carbon nanotube fiber composite fabric friction material.

[0036] To demonstrate the mechanical properties of carbon nanotube fiber fabrics, this embodiment also includes a cut comparison of carbon nanotube fabrics and carbon fiber fabrics. Figures 3-6The high and low magnification morphologies of the cut locations of carbon fiber fabric and carbon nanotube fabric are shown respectively. It can be observed that the cut locations of carbon fiber fabric exhibit obvious brittle fracture surfaces, with fibers breaking neatly along the cut lines, while this phenomenon is not observed in carbon nanotube fabric. This indicates that carbon nanotube fiber fabric has better plasticity.

[0037] Carbon nanotube fibers and aramid fibers were subjected to air atmosphere treatment at 300℃, 400℃, 450℃, and 500℃ for 1 hour, respectively, followed by tensile tests. The load retention rate was analyzed, and the results are as follows: Figures 7-10 As shown, it can be observed that… The tensile results show that the strength of carbon nanotube fibers decreases after high-temperature treatment. The load remains stable above 90% below 400℃, but begins to decrease significantly at 450℃, reaching 48%, and further decreases to 28% at 500℃. This suggests that carbon nanotube fiber fabrics can maintain high strength and good abrasion resistance when used below 400℃. In contrast, aramid fibers show a significant decrease in strength after treatment at 300℃, dropping directly to 80%, and completely carbonize at 500℃. Therefore, compared to aramid fibers, carbon nanotube fibers have a greater advantage at high temperatures.

[0038] Carbon nanotube fibers and aramid fibers were subjected to roll forming and then tensile tests were conducted. The load retention rate was analyzed, and the results are as follows: Figures 11-14 As shown, it can be observed that... During the rolling process, carbon nanotubes become denser, and their strength increases by 120%. Aramid also shows an increase in strength after rolling, but the error is significant. Therefore, the densification process of carbon nanotubes is more uniform during rolling.

[0039] The original fabric, graphite composite fabric, and final wear-resistant material obtained in the above steps were subjected to friction and wear performance tests using a ring-block friction and wear tester under different speeds and loads, and the friction performance was analyzed.

[0040] in, Figure 16 The original fabric friction data, Figure 17 Friction data for graphite composite fabrics after graphite layer deposition show that neither exhibits excellent wear resistance; while... Figure 18 and Figure 19 As shown, after phenolic resin curing, the composite material exhibits superior performance compared to other materials under different friction speeds and loads, regardless of the applied friction speed or load. Figure 16 and Figure 17 Significantly superior wear resistance. Figure 16 Comparing pure carbon nanotube fiber fabric with carbon nanotube fiber fabric made of composite graphite, the coefficient of friction decreased from 0.218 to 0.186, indicating that graphite can effectively reduce the coefficient of friction. Figure 17The resin composite of the two materials resulted in a decrease in the coefficient of friction from 0.168 to 0.142, indicating that the resin further reduced the coefficient of friction. Figure 18 , 19 The samples were tested under different conditions using composite graphite and resin. Analysis of the data shows that the higher the speed, the lower the coefficient of friction. However, at a speed of 1 m / s, the coefficient of friction changes drastically because the high speed causes oxidation of the grinding ring. Higher loads result in a lower coefficient of friction.

[0041] also, Figure 20 Friction data of the wear-resistant material after treatment at different temperatures (1 hour in air atmosphere) are also shown. It can be found that the wear-resistant material can still maintain excellent friction performance even after treatment at higher temperatures.

[0042] Therefore, the present invention provides a heat-resistant and load-bearing carbon nanotube fiber fabric composite material, which has the characteristics of high thermal conductivity and high load-bearing capacity. The composite material is made by depositing graphite onto carbon nanotube fabric and then bonding it with phenolic resin, which can solve the problems of limited temperature application range and poor bonding force of traditional materials, and exhibits excellent wear resistance under high temperature and high load conditions.

[0043] It should be understood that the above embodiments are merely illustrative of the technical concept and features of the present invention, and are intended to enable those skilled in the art to understand the content of the present invention and implement it accordingly. They should not be construed as limiting the scope of protection of the present invention. All equivalent changes or modifications made in accordance with the spirit and essence of the present invention should be covered within the scope of protection of the present invention.

Claims

1. A high-wear-resistant carbon nanotube fiber composite fabric friction material for high-temperature and high-load-bearing environments, characterized in that, It includes the main structure, graphite deposit layer, and thermosetting resin; The main structure is woven from carbon nanotube fibers, the graphite deposition layer is distributed on the surface of the carbon nanotube fibers, and the thermosetting resin is filled between the carbon nanotube fibers.

2. The high wear-resistant carbon nanotube fiber composite fabric friction material according to claim 1, characterized in that, The graphite deposition layer is composed of spherical nano-graphite powder.

3. The high wear-resistant carbon nanotube fiber composite fabric friction material according to claim 2, characterized in that, The spherical nano-graphite powder has a particle size of 100-200 nm; The carbon nanotube fibers are fused carbon nanotube bundles with a diameter of 100-300 μm.

4. The high wear-resistant carbon nanotube fiber composite fabric friction material according to claim 1, characterized in that, The mass ratio of the carbon nanotube fiber, the graphite deposit layer, and the thermosetting resin is (60-75):(5-10):(20-30).

5. The high wear-resistant carbon nanotube fiber composite fabric friction material according to claim 1, characterized in that, The thermosetting resin includes any one or a combination of two of phenolic resin and epoxy resin.

6. A method for preparing the high wear-resistant carbon nanotube fiber composite fabric friction material according to any one of claims 1-5, characterized in that, include: Carbon nanotube fibers are woven together to form the main structure; A graphite dispersion was prepared, and the main structure was used as a filter material. The graphite dispersion was filtered and the main structure was dried to form a graphite deposition layer on the surface of the carbon nanotube fibers, thereby obtaining a composite fabric. A thermosetting resin solution is prepared, the composite fabric is immersed in the thermosetting resin solution, and then dried to obtain a resin-containing fabric. The resin-containing fabric is subjected to hot pressing treatment to cure the thermosetting resin and densify the resin-containing fabric, thereby obtaining a high wear-resistant carbon nanotube fiber composite fabric friction material.

7. The preparation method according to claim 6, characterized in that, The concentration of the graphite dispersion is 1-8 mg / ml; And / or, the mass fraction of thermosetting resin in the thermosetting resin solution is 1-25%.

8. The preparation method according to claim 6, characterized in that, Specifically, it includes: The process of repeatedly immersing the composite fabric in the thermosetting resin solution and then drying it is repeated until the mass fraction of the composite fabric in the resin-containing fabric is 70-80%.

9. The preparation method according to claim 6, characterized in that, The hot pressing treatment is performed at a temperature of 150-200 ℃ for 1-4 h and a pressure of 0.5-2.5 MPa.

10. The application of the high wear-resistant carbon nanotube fiber composite fabric friction material according to any one of claims 1-5 in the fields of aerospace, heavy machinery, and new energy equipment.

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