Composite material structure with heat conduction and insulation functions

Abstract

The invention provides a composite material structure with both heat conduction and insulation, the flatness is good, the size thickness is ultrathin, the internal space of equipment can be greatly saved, and the light weight of the equipment is improved. The center of the insulating fiber outer frame is provided with a cavity, and the cavity has a set height; a graphite layer; the two insulating fiber layers specifically comprise a first insulating fiber layer and a second insulating fiber layer; and 2N carbon fiber composite material layers, wherein N is a natural number. Each carbon fiber composite material layer is of the same area structure, the area shape of each carbon fiber composite material layer is the area shape of the cavity, the area shape of the insulating fiber layer is the frame area shape of the insulating fiber outer frame, and the area shape of the graphite layer is the area shape of the cavity.

Description

Technical Field

[0001] The invention relates to the technical field of composite materials, in particular to a composite material structure having both thermal conductivity and insulation properties. Background Art

[0002] Carbon fiber composites have excellent mechanical properties, high specific strength, high specific modulus, light weight and high strength. They are widely used in aerospace, automobile, shipbuilding, medical, 3C electronics, sports and leisure and other fields. However, thermal conductivity and insulation performance have always been problems that hinder the widespread application of carbon fiber composites. In order to solve this problem, the more commonly used method is to physically combine multiple functional materials, that is, to adhere thermal conductive materials and insulating materials to the periphery of carbon fiber composites. This method not only increases the overall product size, but also the overall product is discontinuous, and it is easy to debond and fail due to thermal shock during use. For this reason, it is urgently necessary to develop a material structure that uses carbon fiber composites and has both thermal conductivity and insulation, so that the manufactured composite material has good integrity and is suitable for use in high and low temperature environments. Summary of the invention

[0003] In response to the above problems, the present invention provides a composite material structure that is both thermally conductive and insulating, which can effectively reduce the adverse effects of heat generated during equipment operation, while also maintaining the excellent mechanical strength of carbon fiber, ensuring the long-term reliability of the equipment in different environments. It has good flatness and ultra-thin size and thickness, which can greatly save internal space of the equipment and improve the lightweight of the equipment.

[0004] A composite material structure having both thermal conductivity and insulation, characterized in that it comprises:

[0005] An insulating fiber outer frame having a cavity at its center, the cavity having a set height;

[0006] Graphite layer;

[0007] Two insulating fiber layers, specifically a first insulating fiber layer and a second insulating fiber layer;

[0008] and 2N carbon fiber composite material layers, where N is a natural number;

[0009] Each layer of carbon fiber composite material layer has the same surface domain structure, and the surface domain shape of each layer of carbon fiber composite material layer is the surface domain shape of the cavity, the surface domain shape of the insulating fiber layer is the frame surface domain shape of the insulating fiber outer frame, and the surface domain shape of the graphite layer is the surface domain shape of the cavity. The upper surface of the graphite layer is stacked with N layers of the carbon fiber composite material layers in sequence, and the lower surface of the graphite layer is stacked with N layers of the carbon fiber composite layers in sequence. The insulating fiber outer frame is placed on the upper surface of the first insulating fiber layer, and the graphite layer together with 2N layers of carbon fiber composite material layers are placed in the cavity, and the bottom carbon fiber composite layer is close to the upper surface of the first insulating fiber layer. The second insulating fiber layer is covered on the upper surface of the insulating fiber outer frame to form a composite material structure, and then the composite material structure is cured into an integrated material at one time through high temperature and high pressure.

[0010] It is further characterized by:

[0011] The outer edge of the inner cavity layer formed by the graphite layer and the 2N layers of carbon fiber composite material layer is in close contact with the inner wall of the insulating fiber outer frame;

[0012] The outer frame of the insulating fiber is a circular ring, an elliptical ring, a quasi-circular ring or a quasi-elliptical ring structure;

[0013] The outer frame of the insulating fiber is a rectangular frame structure, and the width of each frame is the same, ensuring uniform and stable deformation during high temperature and high pressure pressing;

[0014] The material of the carbon fiber composite material layer is polyacrylonitrile-based carbon fiber reinforced composite material, asphalt-based carbon fiber reinforced resin-based composite material, or polyacrylonitrile-based carbon fiber and asphalt-based carbon fiber mixed reinforced resin-based composite material;

[0015] The materials of the insulating fiber outer frame and the two insulating fiber layers are E-glass fiber, S-glass fiber, aramid fiber or silicon nitride fiber;

[0016] The carbon fiber composite material layer, the insulating fiber outer frame, and the two insulating fiber layers are all laminated layers of prepregs, and the corresponding fibers of each layer of prepregs are fully impregnated with epoxy resin in advance, so that when compounded at high temperature and high pressure, the epoxy resin is cured and the three materials of carbon fiber, insulating fiber and graphite are cross-linked to form an integrated structure;

[0017] The preferred value of N is 2, 3, or 4;

[0018] It organically combines carbon fiber, insulating fiber and graphite, combining the excellent mechanical properties of carbon fiber composite materials and the thermal conductivity of graphite materials. The thermal conductivity coefficient of the overall structure is over 100W / (m*k).

[0019] The minimum thickness of the integrated structure formed by this structure is 0.15mm, and the flatness of the product after high temperature and high pressure molding is less than 1mm.

[0020] After adopting the present invention, a graphite layer together with 2N carbon fiber composite material layers are arranged in the cavity of the outer frame of the insulating fiber, and the bottom layer is the first insulating fiber layer and the upper layer is the second insulating fiber layer, and then the composite material structure is cured into an integrated material at one time through high temperature and high pressure.

[0021] The combined structure of this multifunctional material can effectively reduce the adverse effects of heat generated by equipment operation, while also maintaining the excellent mechanical strength of carbon fiber, ensuring the long-term reliability of the equipment in different environments. The integrated material obtained by its production has good flatness and ultra-thin size and thickness, which can greatly save the internal space of the equipment and increase the lightweight of the equipment. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a schematic diagram of a three-dimensional explosion structure of a specific embodiment of the present invention;

[0023] The names corresponding to the serial numbers in the figure are as follows:

[0024] Insulating fiber outer frame 10 , cavity 11 , frame 12 , graphite layer 20 , insulating fiber layer 30 , first insulating fiber layer 31 , second insulating fiber layer 32 , carbon fiber composite material layer 40 . DETAILED DESCRIPTION

[0025] A composite material structure that is both thermally conductive and insulating, see Figure 1 , which includes an insulating fiber outer frame 10, a graphite layer 20, two insulating fiber layers 30, and 2N carbon fiber composite material layers 40, where N is a natural number;

[0026] The center of the insulating fiber outer frame 10 is a cavity 11, and the cavity 11 has a set height; the two insulating fiber layers 30 are specifically a first insulating fiber layer 31 and a second insulating fiber layer 32;

[0027] Each layer of carbon fiber composite material layer 40 has the same surface domain structure, and the surface domain shape of each layer of carbon fiber composite material layer 40 is the surface domain shape of the cavity 11, the surface domain shape of the insulating fiber layer 30 is the surface domain shape of the frame 12 of the insulating fiber outer frame 10, and the surface domain shape of the graphite layer 20 is the surface domain shape of the cavity 11. The upper surface of the graphite layer 20 is stacked with N layers of carbon fiber composite material layers 40 in sequence, and the lower surface of the graphite layer 20 is stacked with N layers of carbon fiber composite layers 40 in sequence. The insulating fiber outer frame 10 is placed on the upper surface of the first insulating fiber layer 31, and the graphite layer 20 together with 2N layers of carbon fiber composite material layers 40 are placed in the cavity 11, and the bottom carbon fiber composite layer 40 is close to the upper surface of the first insulating fiber layer 31, and the second insulating fiber layer 32 is covered on the upper surface of the insulating fiber outer frame 10 to form a composite material structure, and then the composite material structure is cured into an integrated material at one time through high temperature and high pressure.

[0028] The outer edge of the inner cavity layer formed by the graphite layer 20 and the 2N layers of carbon fiber composite material layer 40 is in close contact with the inner wall of the insulating fiber outer frame 10;

[0029] In a specific embodiment, the outer frame 10 of the insulating fiber is a rectangular frame structure, and the width of each frame 12 is the same, ensuring uniform and stable deformation during high temperature and high pressure pressing;

[0030] The material of the carbon fiber composite material layer 40 is polyacrylonitrile-based carbon fiber reinforced composite material, asphalt-based carbon fiber reinforced resin-based composite material, or polyacrylonitrile-based carbon fiber and asphalt-based carbon fiber mixed reinforced resin-based composite material;

[0031] The materials of the insulating fiber outer frame 10 and the two insulating fiber layers 30 are E-glass fiber, S-glass fiber, aramid fiber or silicon nitride fiber;

[0032] The carbon fiber composite material layer 40, the insulating fiber outer frame 10, and the two insulating fiber layers 30 are all laminated prepregs. The fibers of each corresponding layer of prepreg are fully impregnated with epoxy resin in advance, so that when compounded under high temperature and high pressure, the epoxy resin is cured and the three materials of carbon fiber, insulating fiber and graphite are cross-linked to form an integrated structure.

[0033] In a specific embodiment, the value of N is 2, that is, two layers of carbon fiber composite material layers 40 are stacked in sequence on the upper surface of the graphite layer 20, and two layers of carbon fiber composite layers 40 are stacked in sequence on the lower surface of the graphite layer 20, which organically combines the three materials of carbon fiber, insulating fiber, and graphite, and has both the excellent mechanical properties of carbon fiber composite materials and the thermal conductivity of graphite materials, and the overall structural thermal conductivity coefficient is more than 100W / (m*k);

[0034] The minimum thickness of the integrated structure formed by this structure is 0.15mm, and the flatness of the product after high temperature and high pressure molding is less than 1mm.

[0035] After adopting the present invention, a graphite layer together with 2N carbon fiber composite material layers are arranged in the cavity of the outer frame of the insulating fiber, and the bottom layer is the first insulating fiber layer and the upper layer is the second insulating fiber layer, and then the composite material structure is cured into an integrated material at one time through high temperature and high pressure.

[0036] This multifunctional material combined structure can effectively reduce the adverse effects of heat generated by equipment operation, while also maintaining the excellent mechanical strength of carbon fiber, ensuring the long-term reliability of the equipment in different environments. The one-piece material obtained by its production has good flatness and ultra-thin size thickness, which can greatly save the internal space of the equipment and improve the lightweight of the equipment. The one-piece material produced has high thermal conductivity and high strength, and is ultra-thin, light, and has good flatness. The one-piece overall structure gives it good continuity and stability. It is widely used in 5G communications and drones, in particular, and can bring new solutions to the fields of aerospace technology and communications electronics.

[0037] It will be apparent to those skilled in the art that the invention is not limited to the details of the exemplary embodiments described above and that the invention can be implemented in other specific forms without departing from the spirit or essential features of the invention. Therefore, the embodiments should be considered exemplary and non-limiting in all respects, and the scope of the invention is defined by the appended claims rather than the foregoing description, and it is intended that all variations falling within the meaning and scope of the equivalent elements of the claims be included in the invention. Any reference numeral in a claim should not be considered as limiting the claim to which it relates.

[0038] In addition, it should be understood that although the present specification is described according to implementation modes, not every implementation mode contains only one independent technical solution. This description of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment may also be appropriately combined to form other implementation modes that can be understood by those skilled in the art.

Claims

1. A composite material structure having both thermal conductivity and insulation, characterized in that: It includes: An insulating fiber outer frame having a cavity at its center, the cavity having a set height; Graphite layer; Two insulating fiber layers, specifically a first insulating fiber layer and a second insulating fiber layer; and 2N carbon fiber composite material layers, where N is a natural number; Each layer of carbon fiber composite material layer has the same surface domain structure, and the surface domain shape of each layer of carbon fiber composite material layer is the surface domain shape of the cavity, the surface domain shape of the insulating fiber layer is the frame surface domain shape of the insulating fiber outer frame, and the surface domain shape of the graphite layer is the surface domain shape of the cavity. The upper surface of the graphite layer is stacked with N layers of the carbon fiber composite material layers in sequence, and the lower surface of the graphite layer is stacked with N layers of the carbon fiber composite layers in sequence. The insulating fiber outer frame is placed on the upper surface of the first insulating fiber layer, and the graphite layer together with 2N layers of carbon fiber composite material layers are placed in the cavity, and the bottom carbon fiber composite layer is close to the upper surface of the first insulating fiber layer. The second insulating fiber layer is covered on the upper surface of the insulating fiber outer frame to form a composite material structure, and then the composite material structure is cured into an integrated material at one time through high temperature and high pressure.

2. The composite material structure having both thermal conductivity and insulation properties according to claim 1, characterized in that: The outer edge of the inner cavity layer formed by the graphite layer and the 2N layers of carbon fiber composite material layers is in close contact with the inner wall of the insulating fiber outer frame.

3. The composite material structure having both thermal conductivity and insulation properties according to claim 1, characterized in that: The outer frame of the insulating fiber is a circular ring, an elliptical ring, a quasi-circular ring or a quasi-elliptical ring structure.

4. The composite material structure having both thermal conductivity and insulation properties according to claim 1, characterized in that: The outer frame of the insulating fiber is a rectangular frame structure, and the width of each frame is the same.

5. The composite material structure having both thermal conductivity and insulation properties according to claim 1, characterized in that: The material of the carbon fiber composite material layer is polyacrylonitrile-based carbon fiber reinforced composite material, asphalt-based carbon fiber reinforced resin-based composite material, or polyacrylonitrile-based carbon fiber and asphalt-based carbon fiber mixed reinforced resin-based composite material.

6. The composite material structure having both thermal conductivity and insulation properties according to claim 1, characterized in that: The materials of the insulating fiber outer frame and the two insulating fiber layers are E-glass fiber, S-glass fiber, aramid fiber or silicon nitride fiber.

7. The composite material structure having both thermal conductivity and insulation properties according to claim 1, characterized in that: The carbon fiber composite material layer, the insulating fiber outer frame, and the two insulating fiber layers are all laminated prepregs, and the corresponding fibers of each layer of prepreg are fully impregnated with epoxy resin in advance, so that when compounded under high temperature and high pressure, the epoxy resin is cured and the three materials of carbon fiber, insulating fiber and graphite are cross-linked to form an integrated structure.

8. The composite material structure having both thermal conductivity and insulation properties according to claim 1, characterized in that: The value of N is 2, 3, or 4.

9. The composite material structure having both thermal conductivity and insulation properties according to claim 8, characterized in that: It organically combines three materials: carbon fiber, insulating fiber and graphite, combining the excellent mechanical properties of carbon fiber composites and the thermal conductivity of graphite materials. The thermal conductivity coefficient of the overall structure is over 100W / (m*k).

10. The composite material structure having both thermal conductivity and insulation properties according to claim 1, characterized in that: The minimum thickness of the integrated structure formed by this structure is 0.15mm, and the flatness of the product after high temperature and high pressure molding is less than 1mm.

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