Epoxy resin-based composite material with vibration damping performance as well as preparation method and application thereof

Abstract

The invention discloses an epoxy resin-based composite material with vibration damping performance and a preparation method and application thereof, and belongs to the technical field of carbon fiber reinforced composite materials. The carbon fiber reinforced epoxy resin matrix composite material is prepared from the following raw materials in parts by weight: 80-120 parts of epoxy resin, 10-50 parts of a curing agent and 5-10 parts of carbon nanotube / molybdenum disulfide and micron rubber co-embedded damping particles. The epoxy resin-based composite material disclosed by the invention is simple in raw materials, can be commercialized, and meets the low-altitude economic development requirements and the application requirements of aviation aircrafts; and the composite material has high specific strength, high damping vibration attenuation performance, electrical insulation performance and the like, and has a good application prospect in preparation of aircraft skin parts.

Description

Technical Field

[0001] The invention relates to the technical field of carbon fiber reinforced composite materials, and more particularly to an epoxy resin-based composite material with vibration reduction performance and a preparation method and application thereof. Background Art

[0002] Composite materials have good designability and processability, and can meet the manufacturing needs of complex aircraft structures. For example, composite materials can be used to manufacture the streamlined appearance and complex internal structure of the aircraft, optimize aerodynamic performance and internal space layout. When the aircraft is flying at high altitudes, it is affected by aerodynamics and generates a large number of vibration waves. These vibration waves will be transmitted along the aircraft skin material, seriously affecting the stability and service life of the aircraft connectors, and will affect the passengers' riding experience. Traditional aluminum alloy skin materials have poor vibration reduction effects and can no longer meet the current demand for vibration reduction materials in the aviation field.

[0003] Therefore, the current development of high-performance aircraft skin materials should have high strength, light weight, high toughness, vibration reduction, good corrosion resistance and wear resistance to ensure stable operation under complex aerodynamic loads. In addition, the global and Chinese aviation composite material market size has shown a steady growth trend. The development of composite materials with vibration reduction performance meets the needs of low-altitude economic development and the research and development needs of high-end aircraft for quiet lightweight materials. The research and development of vibration-reducing particles with micro-friction vibration reduction performance has important scientific value for improving the damping and vibration reduction performance of resin-based composite materials. Summary of the invention

[0004] The object of the present invention is to provide an epoxy resin-based composite material with vibration reduction performance. The composite material has simple raw materials and a simple preparation process and is suitable for commercial production.

[0005] The second object of the present invention is to provide an epoxy resin-based composite material with vibration damping performance. Compared with aluminum alloy materials of the same thickness, the composite material has better vibration damping performance and can solve the influence of vibration waves generated during the operation of high-altitude aircraft on the stability of connecting parts.

[0006] The third object of the present invention is to develop vibration-damping particles with multi-scale friction damping, which can not only improve the interface bonding of composite materials but also improve the vibration-damping performance of structural parts through mechanical wave attenuation.

[0007] A fourth object of the present invention is to provide a method for preparing an epoxy resin-based composite material with vibration damping performance.

[0008] A fifth object of the present invention is to provide an aircraft skin component.

[0009] In order to achieve the above object, the present invention adopts the following technical solution:

[0010] An epoxy resin-based composite material with vibration reduction performance comprises the following raw materials in parts by weight: 80-120 parts of epoxy resin, 10-50 parts of curing agent, and 5-10 parts of carbon nanotube / molybdenum disulfide@rubber particle co-embedded vibration reduction particles.

[0011] Preferably, the above-mentioned epoxy resin-based composite material with vibration-damping performance comprises the following raw materials in parts by weight: 100 parts of epoxy resin, 30 parts of curing agent, and 7.5 parts of carbon nanotube / molybdenum disulfide@rubber particle co-embedded vibration-damping particles.

[0012] Preferably, the epoxy resin is GIN2 low-viscosity flow-guiding epoxy resin; and the curing agent is GIN2-BL curing agent corresponding to the epoxy resin.

[0013] Preferably, the length of the carbon nanotubes is 3 to 12 um, the size of the molybdenum disulfide sheets is 2 to 10 um, and the size of the rubber particles is 0.1 to 0.85 mm.

[0014] The carbon fiber reinforced epoxy resin matrix composite material of the invention has simple raw materials, good vibration reduction performance, light weight, good mechanical properties, good electrical insulation, and has good application prospects in the preparation of aircraft skins and low-altitude aircraft materials.

[0015] The epoxy resin-based composite material with vibration-damping performance is mainly made of carbon fiber, epoxy resin, curing agent, and multi-scale carbon nanotube / molybdenum disulfide@rubber particle co-embedded vibration-damping particles.

[0016] The mass ratio of carbon fiber to resin matrix in the epoxy resin-based composite material with vibration reduction performance is 50-60:50-40.

[0017] The method for preparing the epoxy resin-based composite material having vibration damping performance comprises the following steps:

[0018] 1) preparing a 15-45wt% γ-aminopropyltriethoxysilane (silane coupling agent KH-550) solution, not limited to silane coupling agent KH-550, but also including KH560, KH570, KH590 and other silane coupling agents, and the solvent is a mixed solution of ethanol and water with a mass ratio of 5-1:1;

[0019] 2) adding carbon nanotubes and molybdenum disulfide to a silane coupling agent KH-550 solution, stirring at room temperature for 0.5 to 3 hours, then ball milling in a ball mill for 1.5 to 3 hours, then filtering, washing with water three times, washing with ethanol three times, and drying at 80° C. to obtain a carbon nanotube / molybdenum disulfide silanized mixed powder;

[0020] 3) mixing the carbon nanotube / molybdenum disulfide silanized mixed powder and the micron rubber particles in an ethanol solution by ball milling for 2 to 8 hours, followed by suction filtration, water washing, drying and grinding to obtain carbon nanotube / molybdenum disulfide@rubber particle co-embedded vibration damping particles;

[0021] 4) adding carbon nanotube / molybdenum disulfide@rubber particle co-embedded vibration-damping particles to epoxy resin at a temperature of 40 to 60° C. and stirring for 1 to 2 hours; then adding a curing agent to the epoxy resin and continuing to stir for 30 to 90 minutes;

[0022] 5) Spread the carbon fiber cloth (or glass fiber cloth, aramid fiber cloth) flatly in the mold, and then vacuum guide the thermosetting epoxy resin mixed with carbon nanotubes / molybdenum disulfide@rubber particles and embedded vibration-damping particles into the mold to prepare the prepreg, and finally hot press it into shape.

[0023] The ball milling solution of the carbon nanotube / silanized molybdenum disulfide mixed powder and the micron rubber particles in step 3) is any one of water, ethanol, or a mixture of the two, or a silane coupling agent solution of a certain concentration is continuously added. The mass ratio of the ball milling solution to the carbon nanotube / silanized molybdenum disulfide mixed powder and the micron rubber particles is 100-120:5-20.

[0024] In step 4), the carbon nanotube / molybdenum disulfide@rubber particle co-embedded vibration-damping particles are added to the epoxy resin, and the epoxy resin is heated to 40-60° C. to reduce the viscosity of the epoxy resin and improve the dispersibility of the carbon nanotube / molybdenum disulfide@rubber particle co-embedded vibration-damping particles.

[0025] In step 4), after adding the carbon nanotube / molybdenum disulfide@rubber particle co-embedded vibration-damping particles to the epoxy resin, stir for 2 to 3 hours, then add the curing agent and continue stirring for 30 to 90 minutes to ensure that the epoxy resin and the curing agent are fully mixed to prevent local curing.

[0026] In step 5), before using the carbon fiber cloth (or glass fiber cloth, aramid fiber cloth), its surface is soaked in anhydrous ethanol or acetone for 15 to 30 minutes, then soaked in deionized water for 15 minutes, and dried at 50 to 80° C. to remove the sizing agent and impurities on the surface.

[0027] The carbon fiber cloth is carbon fiber T300. The density of carbon fiber is 1.79g / cm 3 .

[0028] The carbon fiber cloth in step 5) is 4 to 8 layers.

[0029] The size of the carbon fiber cloth in step 5) is 300*300mm, or the size can be customized according to actual needs. The mold is a stainless steel flat plate, which is cleaned before use and a layer of release cloth is laid on its surface to prevent the resin from adhering to the mold surface and contaminating the mold.

[0030] In step 5), the epoxy resin mixed with carbon nanotubes / molybdenum disulfide@rubber particles and co-embedded vibration-damping particles is vacuum-guided into a mold covered with carbon fiber cloth at a pressure of 0.1-1 MPa to obtain a prepreg.

[0031] In step 5), the prepreg is hot-pressed at a temperature of 120 to 150° C. and a pressure of 0.6 to 1 MPa for 1 to 3 hours. After the hot-pressing is completed, the prepreg is naturally cooled to 60° C. or room temperature, and demoulding is performed to obtain a carbon fiber reinforced composite material.

[0032] A lightweight and high-strength vibration-damping skin part for aircraft is made of the above-mentioned epoxy resin-based composite material with vibration-damping properties. Large-area samples can be prepared by only changing the mold size to meet actual application scenarios.

[0033] It can be seen from the above technical solution that compared with the prior art, the present invention has the following beneficial effects:

[0034] The epoxy resin-based composite material with vibration reduction performance prepared by the invention has simple raw materials, good vibration reduction performance, light weight, good mechanical properties, and good electrical insulation, and has good application prospects in the demand for lightweight and high-strength vibration reduction in aircraft skins and low-altitude aircraft materials.

[0035] The aircraft vibration-damping skin of the present invention adopts the epoxy resin-based composite material with vibration-damping performance of the present invention. The entire structural component has the advantages of low density, light weight, high strength, good vibration-damping performance, acid and alkali resistance, corrosion resistance, high temperature resistance, good electrical insulation, etc., and solves the problem of poor vibration-damping performance of aluminum alloy plates used for traditional aircraft skins, meets the country's demand for lightweight and high-strength vibration-damping performance of aviation composite materials, and has high economic value for the development of low-altitude economy. BRIEF DESCRIPTION OF THE DRAWINGS

[0036] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the provided drawings without paying creative work.

[0037] Figure 1 This is the microscopic morphology of carbon nanotube / molybdenum disulfide@rubber particle co-embedded vibration damping particles;

[0038] Figure 2 This is a physical picture of the carbon fiber reinforced epoxy resin matrix composite material plate. DETAILED DESCRIPTION

[0039] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0040] Example 1

[0041] This embodiment provides a carbon fiber reinforced epoxy resin matrix composite material with vibration reduction performance, which is prepared from the following raw materials in parts by weight: 80 parts of epoxy resin and 20 parts of curing agent.

[0042] The carbon fiber reinforced epoxy resin matrix composite material of this embodiment uses T300 carbon fiber, GIN2 low-viscosity flow-guiding epoxy resin as the resin, and the curing agent is GIN2-BL curing agent corresponding to the epoxy resin. The mass ratio of carbon fiber to resin matrix in the carbon fiber reinforced epoxy resin composite material is 60:40.

[0043] The preparation method of the carbon fiber reinforced epoxy resin matrix composite material with vibration damping performance of this embodiment comprises the following steps:

[0044] 1) Before using the T300 carbon fiber cloth, soak its surface in anhydrous ethanol or acetone for 15 to 30 minutes, then soak it in deionized water for 15 minutes, take it out and dry it at 50 to 80°C to remove the sizing agent and impurities on the surface.

[0045] 2) Stir the epoxy resin and curing agent at 40°C for 15 minutes to ensure that the epoxy resin and curing agent are fully mixed.

[0046] 3) Cut the T300 carbon fiber cloth into 300*300mm size, a total of four layers. The mold is a stainless steel flat plate, which should be cleaned before use and a layer of release cloth should be laid on its surface to prevent the resin from adhering to the mold surface and contaminating the mold.

[0047] 4) The epoxy resin is vacuum-inducted into a mold covered with carbon fiber cloth at a pressure of 0.1 MPa to obtain a prepreg.

[0048] 5) The prepreg was hot-pressed at a temperature of 120° C. and a pressure of 0.6 MPa for 2 h. After the hot-pressing, the prepreg was naturally cooled to 60° C. to obtain a carbon fiber reinforced epoxy resin matrix composite material.

[0049] Example 2

[0050] The present embodiment provides a carbon fiber reinforced epoxy resin matrix composite material with vibration reduction performance, which is prepared from the following raw materials in parts by weight: 80 parts of epoxy resin, 20 parts of curing agent, and 5 parts of mixed particles of carbon nanotubes and micron rubber particles.

[0051] The carbon fiber reinforced epoxy resin matrix composite material of this embodiment uses T300 carbon fiber, GIN2 low-viscosity flow-guiding epoxy resin as the resin, and the curing agent is GIN2-BL curing agent corresponding to the epoxy resin. The mass ratio of carbon fiber to resin matrix in the carbon fiber reinforced epoxy resin composite material is 60:40.

[0052] The preparation method of the carbon fiber reinforced epoxy resin matrix composite material with vibration damping performance of this embodiment comprises the following steps:

[0053] 1) mixing carbon nanotubes and micro rubber particles in an ethanol solution by ball milling for 4 hours, followed by suction filtration, water washing, drying, and grinding to obtain carbon nanotube / rubber particle co-embedded vibration-damping particles;

[0054] 2) Add 5 parts of carbon nanotube / rubber particle co-embedded vibration-damping particles to the epoxy resin at a temperature of 50°C and stir for 2 hours to ensure that the carbon nanotube / rubber particles are fully dispersed in the epoxy resin; then add the curing agent to the epoxy resin and continue stirring for 30 minutes;

[0055] 3) Cut the T300 carbon fiber cloth into 300*300mm size, four layers in total. The mold is a stainless steel flat plate, which should be cleaned before use and a layer of release cloth should be laid on its surface to prevent the resin from adhering to the mold surface and contaminating the mold;

[0056] 4) Lay 4 layers of carbon fiber cloth flat on the mold;

[0057] 5) vacuum-guiding the epoxy resin mixed with carbon nanotubes / rubber particles into a mold covered with carbon fiber cloth at a pressure of 0.1 MPa to obtain a prepreg;

[0058] 6) The prepreg was hot-pressed at a temperature of 120° C. and a pressure of 0.6 MPa for 2 hours. After the hot-pressing, the prepreg was naturally cooled to 60° C. to obtain a carbon fiber reinforced epoxy resin matrix composite material with vibration reduction performance.

[0059] Example 3

[0060] The present embodiment provides a carbon fiber reinforced epoxy resin matrix composite material with vibration reduction performance, which is prepared from the following raw materials in parts by weight: 100 parts of epoxy resin, 30 parts of curing agent, and 7.5 parts of mixed particles of carbon nanotubes and micron rubber particles.

[0061] The carbon fiber reinforced epoxy resin matrix composite material of this embodiment uses T300 carbon fiber, GIN2 low-viscosity flow-guiding epoxy resin as the resin, and the curing agent is GIN2-BL curing agent corresponding to the epoxy resin. The mass ratio of carbon fiber to resin matrix in the carbon fiber reinforced epoxy resin composite material is 60:40.

[0062] The preparation method of the carbon fiber reinforced epoxy resin matrix composite material with vibration damping performance of this embodiment comprises the following steps:

[0063] 1) mixing carbon nanotubes and micro rubber particles in an ethanol solution by ball milling for 4 hours, followed by suction filtration, water washing, drying, and grinding to obtain carbon nanotube / rubber particle co-embedded vibration-damping particles;

[0064] 2) Add 7.5 parts of carbon nanotube / rubber particle co-embedded vibration-damping particles to the epoxy resin at a temperature of 50°C and stir for 2 hours to ensure that the carbon nanotube / rubber particles are fully dispersed in the epoxy resin; then add the curing agent to the epoxy resin and continue stirring for 30 minutes;

[0065] 3) Cut the T300 carbon fiber cloth into 300*300mm size, four layers in total. The mold is a stainless steel flat plate, which should be cleaned before use and a layer of release cloth should be laid on its surface to prevent the resin from adhering to the mold surface and contaminating the mold;

[0066] 4) Lay 4 layers of carbon fiber cloth flat on the mold;

[0067] 5) vacuum-guiding the epoxy resin mixed with carbon nanotubes / rubber particles into a mold covered with carbon fiber cloth at a pressure of 0.1 MPa to obtain a prepreg;

[0068] 6) The prepreg was hot-pressed at a temperature of 120° C. and a pressure of 0.6 MPa for 2 hours. After the hot-pressing, the prepreg was naturally cooled to 60° C. to obtain a carbon fiber reinforced epoxy resin matrix composite material with vibration reduction performance.

[0069] Example 4

[0070] The present embodiment provides a carbon fiber reinforced epoxy resin matrix composite material with vibration damping performance, which is prepared from the following raw materials in parts by weight: 100 parts of epoxy resin, 30 parts of curing agent, and 7.5 parts of carbon nanotube / molybdenum disulfide@micron rubber co-embedded vibration damping particles.

[0071] The carbon fiber reinforced epoxy resin matrix composite material of this embodiment uses carbon fiber T300, the resin is GIN2 low-viscosity flow-guiding epoxy resin, and the curing agent is GIN2-BL curing agent corresponding to the epoxy resin. The mass ratio of carbon fiber to resin matrix in the carbon fiber reinforced epoxy resin composite material is 60:40.

[0072] The preparation method of the carbon fiber reinforced epoxy resin matrix composite material with vibration damping performance of this embodiment comprises the following steps:

[0073] 1) adding carbon nanotubes and molybdenum disulfide to a silane coupling agent KH-550 solution (the solvent is a mixed solution of ethanol and deionized water, and the mass ratio of ethanol to deionized water is 2:1), stirring at room temperature for 2 hours, then ball milling it in a ball mill for 1.5 hours, then filtering and washing with water, and drying at 80°C to obtain a carbon nanotube / molybdenum disulfide silanized mixed powder;

[0074] 2) mixing the carbon nanotube / molybdenum disulfide silanized mixed powder and the micron rubber particles in an ethanol solution by ball milling for 4 hours, followed by suction filtration, water washing, drying and grinding to obtain carbon nanotube / molybdenum disulfide@rubber particle co-embedded vibration damping particles;

[0075] 3) Add 7.5 parts of carbon nanotubes / molybdenum disulfide@rubber particles co-embedded vibration-damping particles to an epoxy resin at a temperature of 50°C and stir for 2 hours to ensure that the carbon nanotubes / molybdenum disulfide@rubber particles co-embedded vibration-damping particles are fully dispersed in the epoxy resin; then add the curing agent to the epoxy resin and continue stirring for 30 minutes;

[0076] 4) Cut the T300 carbon fiber cloth into 300*300mm size, four layers in total. The mold is a stainless steel flat plate, which should be cleaned before use and a layer of release cloth should be laid on its surface to prevent the resin from adhering to the mold surface and contaminating the mold;

[0077] 5) Lay 4 layers of carbon fiber cloth flat on the mold;

[0078] 6) vacuum-introducing the epoxy resin mixed with carbon nanotubes / molybdenum disulfide@rubber particles and co-embedded vibration-damping particles into a mold paved with carbon fiber cloth at a pressure of 0.1 MPa to obtain a prepreg;

[0079] 7) The prepreg was hot-pressed at a temperature of 120° C. and a pressure of 0.6 MPa for 2 hours. After the hot-pressing, the prepreg was naturally cooled to 60° C. to obtain a carbon fiber reinforced epoxy resin matrix composite material with vibration reduction performance.

[0080] Experimental example

[0081] The damping factor of the glass transition temperature of the composite material is a key indicator that intuitively reflects the vibration reduction performance of the material. The tensile strength of the material is a key indicator that reflects the mechanical properties of the material. The loss factor at the glass transition temperature of the carbon fiber reinforced epoxy resin matrix composite material with vibration reduction performance in Experimental Examples 1-4 was tested, and the tensile strength of the carbon fiber reinforced epoxy resin matrix composite material with vibration reduction performance was tested. Figure 1 This is the microscopic morphology of carbon nanotube / molybdenum disulfide@rubber particle co-embedded vibration-damping particles. Figure 2This is a physical picture of the carbon fiber reinforced epoxy resin matrix composite material plate.

[0082] Table 1 Test results of maximum loss factor of carbon fiber reinforced epoxy resin matrix composite materials at glass transition temperature in Examples 1-4

[0083] project Example 1 Example 2 Implementation 3 Implementation 4 Loss Factor 0.134 0.217 0.251 0.265

[0084] Table 2 Tensile strength performance test results of carbon fiber reinforced epoxy resin matrix composite materials in Examples 1-4

[0085]

[0086] By comparing implementation cases 1-4, it can be found that by adding carbon nanotubes / molybdenum disulfide@rubber particles co-embedded vibration-damping particles into the carbon fiber reinforced epoxy resin matrix composite material, the damping factor and tensile strength of the composite material are improved. This is because the multi-interface friction of the two-dimensional materials carbon nanotubes and molybdenum disulfide increases the vibration loss energy, and the carbon nanotubes / molybdenum disulfide@rubber particles co-embedded vibration-damping particles are better able to reduce vibration without losing strength than traditional single rubber particles. The multi-interface friction and micro-nano interface interlocking ensure the lightweight, high-strength, damping and vibration reduction effects of the composite material.

[0087] In this specification, each embodiment is described in a progressive manner, and each embodiment focuses on the differences from other embodiments. The same or similar parts between the embodiments can be referred to each other. For the device disclosed in the embodiment, since it corresponds to the method disclosed in the embodiment, the description is relatively simple, and the relevant parts can be referred to the method part.

[0088] The above description of the disclosed embodiments enables one skilled in the art to implement or use the present invention. Various modifications to these embodiments will be apparent to one skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention will not be limited to the embodiments shown herein, but rather to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. An epoxy resin-based composite material with vibration reduction performance, characterized in that: It includes the following components by weight: 80-120 parts of epoxy resin, 10-50 parts of curing agent, and 5-10 parts of carbon nanotube / molybdenum disulfide@micro rubber co-embedded vibration-damping particles.

2. The epoxy resin-based composite material with vibration damping performance according to claim 1, characterized in that: It includes the following components by weight: 100 parts of epoxy resin, 30 parts of curing agent, 7.5 parts of carbon nanotube / molybdenum disulfide@micro rubber co-embedded vibration damping particles.

3. The epoxy resin-based composite material with vibration damping performance according to claim 2, characterized in that: The epoxy resin is GIN2 low-viscosity flow-guiding epoxy resin; the curing agent is GIN2-BL curing agent.

4. The epoxy resin-based composite material with vibration reduction performance according to claim 2, characterized in that: The length of the carbon nanotube is 3-12 um, the size of the molybdenum disulfide is 2-10 um, and the size of the rubber particles is 0.1-0.85 mm.

5. A method for preparing an epoxy resin-based composite material with vibration damping performance as claimed in claim 3 or 4, characterized in that: The following steps are involved: 1) preparing a silane coupling agent solution with a concentration of 15 to 45 wt%, wherein the solvent is a mixed solution of ethanol and water, and the mass ratio of the two is 5 to 1:1; 2) adding carbon nanotubes and molybdenum disulfide to a silane coupling agent solution, stirring at room temperature for a period of time, then ball milling the solution in a ball mill, followed by suction filtration, washing, and drying to obtain a carbon nanotube / molybdenum disulfide silanized mixed powder; 3) mixing the carbon nanotube / molybdenum disulfide silanized mixed powder with the micron rubber particles in a ball milling solution, followed by suction filtration, water washing, drying and grinding to obtain carbon nanotube / molybdenum disulfide@rubber particle co-embedded vibration damping particles; 4) adding carbon nanotube / molybdenum disulfide@rubber particle co-embedded vibration-damping particles to epoxy resin at a temperature of 40 to 60° C. and stirring for 1 to 2 hours; then adding a curing agent to the epoxy resin and continuing to stir for 30 to 90 minutes; 5) The fiber cloth is laid flat in the mold, and then the thermosetting epoxy resin mixed with carbon nanotubes / molybdenum disulfide@rubber particles and co-embedded vibration-damping particles is vacuum-guided into the mold to prepare the prepreg, and finally hot-pressed to form.

6. The method for preparing an epoxy resin-based composite material with vibration damping performance according to claim 5, characterized in that: The silane coupling agent in step 1) includes: silane coupling agent KH-550, KH560, KH570 or KH590.

7. The method for preparing an epoxy resin-based composite material with vibration damping performance according to claim 5, characterized in that: In step 2), the stirring period at room temperature is 0.5 to 3 hours; the ball milling time is 1.5 to 3 hours, the washing is 3 times of water, 3 times of ethanol, and the drying temperature is 80°C.

8. The method for preparing an epoxy resin-based composite material with vibration damping performance according to claim 5, characterized in that: The ball milling solution in step 3) is any one of water, ethanol, or a mixture of the two, or the silane coupling agent solution is continuously added, and the ball milling mixing time is 2 to 8 hours; the fiber cloth in step 5) includes a mixture of one or more of carbon fiber cloth, glass fiber cloth, and aramid fiber cloth.

9. The method for preparing an epoxy resin-based composite material with vibration damping performance according to claim 5, characterized in that: In step 5), the vacuum induction method is replaced by the scraping method.

10. Use of the epoxy resin-based composite material with vibration damping performance as claimed in any one of claims 1 to 4 in the preparation of aircraft skin parts.

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