Carbon fiber composite material plate and manufacturing method thereof

Abstract

The invention discloses a carbon fiber composite material plate which has ultrathin, high-strength, low-warpage and high-heat-conductivity properties, can meet the heat release requirements of electronic equipment and aerospace, and expands the application range of the carbon fiber composite material plate. The composite material comprises first carbon fibers which are PAN-T series carbon fiber layers; the second carbon fiber is a mesophase pitch-based carbon fiber layer; the third carbon fiber is a PAN-T series carbon fiber layer; the first carbon fiber, the second carbon fiber and the third carbon fiber are sequentially pressed into an integral carbon fiber composite material plate, and the arrangement direction of tows or fabrics of the first carbon fiber is parallel to the arrangement direction of tows or fabrics of the third carbon fiber; and the arrangement direction of the tows or fabrics of the second carbon fibers is perpendicular to the arrangement direction of the tows or fabrics of the first carbon fibers.

Description

Technical Field

[0001] The present invention relates to the technical field of composite materials, in particular to a carbon fiber composite material plate. The present invention also provides a method for manufacturing the carbon fiber composite material plate. Background Art

[0002] The material composed of carbon fiber reinforced material and resin matrix is ​​called carbon fiber resin composite material or carbon fiber reinforced plastic. Compared with glass fiber, carbon fiber has a high elastic modulus, which is 4 to 6 times that of glass fiber, and its tensile strength is slightly higher. Carbon fiber also has good high temperature performance. Therefore, when carbon fiber and resin matrix are combined to form a composite material, it not only maintains many advantages of FRP, but also exceeds FRP in many performance aspects. For example, the strength and elastic modulus of carbon fiber-epoxy resin composite materials exceed aluminum alloys, and are even close to high-strength steel, which makes up for the disadvantage of low elastic modulus of FRP. In addition, its specific gravity is smaller than that of FRP, so it becomes one of the composite materials with the highest specific strength and specific modulus.

[0003] Due to the high elastic modulus of carbon fiber, its composite parts are allowed to serve under the ultimate stress state, overcoming the disadvantage that glass fiber resin composite materials are only allowed to be used under conditions below 60% of the ultimate stress. The strength loss of carbon fiber reinforced plastics in high temperature aging tests is also smaller than that of fiberglass reinforced plastics. In addition, it has significant advantages in impact resistance, fatigue resistance, friction reduction and wear resistance, self-lubrication, corrosion resistance and heat resistance.

[0004] However, the existing carbon fiber reinforced resin-based composite materials have poor thermal conductivity and cannot meet the heat release needs of electronic equipment and aerospace, which greatly affects their application scope. Summary of the invention

[0005] In view of the above problems, the present invention provides a carbon fiber composite material plate having ultra-thin, high-strength, low-warping and high thermal conductivity properties, which can meet the heat release needs of electronic equipment and aerospace, and expand the application scope of carbon fiber composite material plates.

[0006] A carbon fiber composite material plate, characterized in that it comprises:

[0007] A first carbon fiber, which is a PAN-T series carbon fiber layer;

[0008] a second carbon fiber, which is a mesophase pitch-based carbon fiber layer;

[0009] and a third carbon fiber, which is a PAN-T series carbon fiber layer;

[0010] The first carbon fiber, the second carbon fiber, and the third carbon fiber are sequentially pressed together to form an integral carbon fiber composite material sheet, the arrangement direction of the first carbon fiber tows or fabrics is parallel to the arrangement direction of the third carbon fiber tows or fabrics, and the arrangement direction of the second carbon fiber tows or fabrics is perpendicular to the arrangement direction of the first carbon fiber tows or fabrics.

[0011] It is further characterized by:

[0012] The first carbon fiber and the third carbon fiber are the same PAN-T series carbon fiber layers;

[0013] The first carbon fiber and the third carbon fiber are intermediate materials obtained by impregnating carbon fiber tows or fabrics with resin, and the resin is epoxy resin or bismaleimide resin;

[0014] The second carbon fiber is an intermediate material obtained by impregnating a mesophase pitch-based carbon fiber tow or fabric with a resin, and the resin is an epoxy resin or a bismaleimide resin;

[0015] The mesophase asphalt-based carbon fiber layer used in the second carbon fiber has good thermal conductivity and high modulus, and the warpage of the large-sized carbon plate produced therefrom is controlled within 0.5 mm;

[0016] The thickness of the carbon fiber composite material sheet is 0.1mm to 0.15mm;

[0017] It is used in aerospace, automotive, and 3C electronics fields that require ultra-thin, light, high-strength, and high thermal conductivity.

[0018] A method for manufacturing a carbon fiber composite material plate, characterized in that it comprises the following steps:

[0019] S1. Selecting appropriate first carbon fiber, second carbon fiber, and third carbon fiber in advance according to the thickness of the composite material plate;

[0020] S2, stacking and laying the first carbon fiber, the second carbon fiber, and the third carbon fiber in sequence at room temperature to shape them;

[0021] S3, putting the first carbon fiber, the second carbon fiber and the third carbon fiber that have been laid and shaped into a mold, and curing and molding them at high temperature / high pressure to obtain a carbon fiber composite material plate.

[0022] It is further characterized by:

[0023] The first carbon fiber, the second carbon fiber, and the third carbon fiber are all intermediate materials obtained by impregnating carbon fiber tows or fabrics with resin. The resin has a certain viscosity at room temperature and can be laid and shaped. At high temperatures, the resin undergoes a curing and cross-linking reaction, thereby curing and forming.

[0024] The first carbon fiber is a PAN-T series carbon fiber layer, the second carbon fiber is a mesophase asphalt-based carbon fiber layer, and the third carbon fiber is a PAN-T series carbon fiber layer;

[0025] The process corresponding to the high temperature / high pressure curing molding in step S3 is a compression molding process or an autoclave molding process.

[0026] After adopting the above technical scheme, the obtained carbon fiber composite material plate has strong practicality and wide applicability, which can effectively reduce the adverse effects caused by the heat generated by the operation of the equipment, and also has high mechanical strength to ensure the long service life of the equipment; its thin thickness and low warping are conducive to the application of the composite material in small portable devices with compact space, such as mobile phones, smart watches, and tablets; its simple hierarchical structure, compared with the single-structure carbon fiber composite material, ensures mechanical strength while having the characteristics of high thermal conductivity, ultra-thinness, and low warping, which can bring new solutions to the fields of aerospace, automobiles, and communications electronics. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 It is a schematic diagram of the structure of the carbon fiber composite material plate of the present invention;

[0028] The names corresponding to the serial numbers in the figure are as follows:

[0029] A first carbon fiber 1, a second carbon fiber 2, and a third carbon fiber 3;

[0030] Carbon fiber composite material plate 10. DETAILED DESCRIPTION

[0031] A carbon fiber composite material sheet, see Figure 1 , which includes a first carbon fiber 1, a second carbon fiber 2, and a third carbon fiber 3;

[0032] The first carbon fiber 1 is a PAN-T series carbon fiber layer; the second carbon fiber 2 is an intermediate phase asphalt-based carbon fiber layer; the third carbon fiber 3 is a PAN-T series carbon fiber layer; the first carbon fiber 1, the second carbon fiber 2, and the third carbon fiber 3 are sequentially pressed into an integral carbon fiber composite material sheet, the arrangement direction of the tows or fabrics of the first carbon fiber 1 is parallel to the arrangement direction of the tows or fabrics of the third carbon fiber 3, and the arrangement direction of the tows or fabrics of the second carbon fiber 2 is perpendicular to the arrangement direction of the tows or fabrics of the first carbon fiber 1.

[0033] In a specific embodiment, the first carbon fiber 1 and the third carbon fiber 3 are the same PAN-T series carbon fiber layers, and the thickness thereof is set to be the same, so that the raw materials can be easily obtained;

[0034] The first carbon fiber 1, the second carbon fiber 2, and the third carbon fiber 3 have the same shape, ensuring that there will be no edge convexity after stacking;

[0035] The first carbon fiber 1 and the third carbon fiber 3 are both intermediate materials obtained by resin impregnation treatment of PAN-T series carbon fiber tow or fabric, and the resin is epoxy resin or bismaleimide resin;

[0036] The second carbon fiber 2 is an intermediate material obtained by impregnating a mesophase pitch-based carbon fiber tow or fabric with a resin, wherein the resin is an epoxy resin or a bismaleimide resin;

[0037] The mesophase asphalt-based carbon fiber layer used in the second carbon fiber 2 has good thermal conductivity and high modulus, and the warpage of the large-sized carbon plate produced therefrom is controlled within 0.5 mm.

[0038] The thickness of the carbon fiber composite material plate 10 is 0.1 mm to 0.15 mm; it is used in aerospace, automobile, 3C electronics and other fields that require ultra-thinness, lightness, high strength and high thermal conductivity.

[0039] A method for manufacturing a carbon fiber composite material plate, characterized in that it comprises the following steps:

[0040] S1. Selecting appropriate first carbon fiber 1, second carbon fiber 2, and third carbon fiber 3 in advance according to the thickness of the composite material plate. In specific implementation, the thickness of the first carbon fiber 1 and the third carbon fiber 3 are both 0.04 mm, and the thickness of the second carbon fiber 2 is 0.03 mm;

[0041] S2, stacking and laying the first carbon fiber 1, the second carbon fiber 2, and the third carbon fiber 3 in sequence at room temperature to shape them;

[0042] S3, putting the first carbon fiber 1, the second carbon fiber 2, and the third carbon fiber 3 that have been laid and shaped into a mold corresponding to the compression molding process, and curing and molding them at high temperature / high pressure to obtain a carbon fiber composite material plate with a thickness of 0.1 mm.

[0043] In a specific embodiment, the first carbon fiber 1, the second carbon fiber 2, and the third carbon fiber 3 in step S1 are all intermediate materials obtained by impregnating carbon fiber tows or fabrics with resin. The resin has a certain viscosity at room temperature and can be laid and shaped. At high temperatures, the resin undergoes a curing and cross-linking reaction, thereby curing and forming.

[0044] The first carbon fiber 1 is a PAN-T series carbon fiber layer, the second carbon fiber 3 is a mesophase pitch-based carbon fiber layer, and the third carbon fiber 4 is a PAN-T series carbon fiber layer.

[0045] The obtained carbon fiber composite material plate has strong practicality and wide applicability. It can effectively reduce the adverse effects of heat generated by equipment operation, and also has high mechanical strength to ensure the long service life of the equipment; its thin thickness and low warping are conducive to the application of the composite material in small portable devices with compact space, such as mobile phones, smart watches, and tablets; its simple hierarchical structure, compared with a single-structure carbon fiber composite material, ensures mechanical strength while having the characteristics of high thermal conductivity, ultra-thinness, and low warping, which can bring new solutions to the fields of aerospace, automobiles, and communications electronics.

[0046] 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.

[0047] 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 carbon fiber composite material plate, characterized in that: It includes: A first carbon fiber, which is a PAN-T series carbon fiber layer; a second carbon fiber, which is a mesophase pitch-based carbon fiber layer; and a third carbon fiber, which is a PAN-T series carbon fiber layer; The first carbon fiber, the second carbon fiber, and the third carbon fiber are sequentially pressed together to form an integral carbon fiber composite material sheet, the arrangement direction of the first carbon fiber tows or fabrics is parallel to the arrangement direction of the third carbon fiber tows or fabrics, and the arrangement direction of the second carbon fiber tows or fabrics is perpendicular to the arrangement direction of the first carbon fiber tows or fabrics.

2. The carbon fiber composite material sheet according to claim 1, characterized in that: The first carbon fiber and the third carbon fiber are the same PAN-T series carbon fiber layers.

3. The carbon fiber composite material sheet according to claim 2, characterized in that: The first carbon fiber and the third carbon fiber are both intermediate materials obtained by impregnating carbon fiber tows or fabrics with resin, and the resin is epoxy resin or bismaleimide resin.

4. The carbon fiber composite material sheet according to claim 1, characterized in that: The second carbon fiber is an intermediate material obtained by impregnating a mesophase pitch-based carbon fiber bundle or fabric with a resin, and the resin is an epoxy resin or a bismaleimide resin.

5. The carbon fiber composite material plate according to claim 4, characterized in that: The mesophase asphalt-based carbon fiber layer used in the second carbon fiber has good thermal conductivity and high modulus, and the warpage of the large-size carbon plate produced therefrom is controlled within 0.5 mm.

6. The carbon fiber composite material plate according to claim 1, characterized in that: The thickness of the carbon fiber composite material plate is 0.1mm to 0.15mm.

7. The carbon fiber composite material plate according to claim 1, characterized in that: It is used in aerospace, automotive, and 3C electronics fields that require ultra-thin, light, high-strength, and high thermal conductivity.

8. A method for manufacturing a carbon fiber composite material plate according to any one of claims 1 to 7, characterized in that: It includes the following steps: S1. Selecting appropriate first carbon fiber, second carbon fiber, and third carbon fiber in advance according to the thickness of the composite material plate; S2, stacking and laying the first carbon fiber, the second carbon fiber, and the third carbon fiber in sequence at room temperature to shape them; S3, putting the first carbon fiber, the second carbon fiber and the third carbon fiber that have been laid and shaped into a mold, and curing and molding them at high temperature / high pressure to obtain a carbon fiber composite material plate.

9. The method for manufacturing a carbon fiber composite material plate according to claim 8, characterized in that: The first carbon fiber, the second carbon fiber, and the third carbon fiber are all intermediate materials obtained by impregnating carbon fiber bundles or fabrics with resin. The resin has a certain viscosity at room temperature and is laid and shaped. At high temperatures, the resin undergoes a curing and cross-linking reaction, thereby curing and forming.

10. The method for manufacturing a carbon fiber composite material plate according to claim 8, characterized in that: The process corresponding to the high temperature / high pressure curing molding in step S3 is a compression molding process or an autoclave molding process.

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