Preparation method of graphene and carbon fiber compound thermal interface material

Abstract

The invention discloses a preparation method of a graphene and carbon fiber compound thermal interface material. A graphene material is laid on a carbon fiber material, an interlayer material of graphene, carbon fiber and graphene is obtained through laminating, the interlayer material is then rolled, and then the compound thermal interface material can be obtained. The method can have the technical advantages that the existing production process is simplified, and the preparation cost of the compound thermal interface material is reduced; a three-dimensional thermal conduction network structure can be formed by graphene in the compound thermal interface material, and then the aim of increasing the product heat conduction coefficient is achieved.

Description

technical field [0001] The invention relates to the field of carbon composite materials, in particular to a method for preparing a graphene and carbon fiber composite thermal interface material. Background technique [0002] Carbon fiber is a new type of fiber material with high strength and high modulus fiber containing more than 95% carbon. It is a microcrystalline graphite material obtained by stacking organic fibers such as flake graphite microcrystals along the axial direction of the fiber, and undergoing carbonization and graphitization. [0003] Graphene has attracted much attention as a new type of carbon material since its discovery in 2004. It is a quasi-two-dimensional crystal material composed entirely of sp2 hybridized carbon atoms with a thickness of only one atomic layer or several single atomic layers. It has high light transmittance, electrical conductivity, thermal conductivity, high specific surface area, high Excellent properties such as strength and fl...

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Problems solved by technology

[0006] One is to add graphene to the spinning stock solution, and then prepare graphene-doped carbon fibers through various spinning processes, such as Chinese Patent No. "201110450967.6", which disclosed a modified graphene on July 4, 2012. The preparation method of polyacrylonitrile-based carbon fiber, but the main problem of this type of method is that the upper functional groups of graphene and carbon fiber are less, resulting in the dispersion and combination of graphene and carbon fiber is a major difficulty

[0007] The second type is to combine the graphene with the carbon fiber by coating and plasma treatment of the prepared carbon fiber, as Chinese Patent No. "200910067708.8" disclosed a composite material of graphene and carbon fiber on June 24, 2009, but using The plasma treatment method is cumbersome and requires special equipment, so this method has the disadvantages of difficult preparation and high cost.

[0008] The third category is to use electrophoresis to deposit graphene on the surface of carbon fibers. For example, Chinese Patent No. "201310582391.8" disclosed a method for preparing graphene / carbon fiber composites on March 5, 2014. The main problem of this method is Because there are basically no functional groups on graphene, it is difficult to stabilize charged ions on graphene

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