Graphene wave absorbing composite material with high thermal conductivity and preparation method thereof

Abstract

The invention belongs to the technical field of composite materials, in particular to a graphene wave absorbing composite material with high thermal conductivity and a preparation method thereof. Thecomposite material is based on a wave absorbing material, and a plurality of graphene film layers are coated on the substrate. The raw materials of the graphene film layer include graphene, an organicpolymer solution and a resin, and the mass components of the graphene film layer are as follows: (0.1-10): (1-20): (0.5-1); the high thermal conductivity graphene wave absorbing composite material ofthe invention adopts the graphene film and the wave absorbing material to prepare the graphene wave absorbing material, and the performance of the wave absorbing material is not affected, and the heat dissipation performance of the whole wave absorbing material is greatly improved because of the excellent thermal conductivity of the graphene; the high thermal conductivity graphene wave absorbingcomposite material of the invention adopts a multi-layer coating mode, which is different from the traditional graphene as an additive, and the surface of the prepared graphene wave absorbing materialhas stronger toughness and hardness, and can be applied to various kinds of machining without fragmentation or deformation.

Description

technical field [0001] The invention belongs to the technical field of composite materials, and in particular relates to a high thermal conductivity graphene wave absorbing composite material and a preparation method. Background technique [0002] With the gradual popularization and promotion of 5G technology, various popular applications including wireless medical treatment, connected smart cars, smart manufacturing, and smart power have received widespread attention, and the corresponding electromagnetic radiation pollution has become increasingly serious. It will not only interfere with the normal work of electronic instruments and equipment, but also affect people's health. At present, based on the above problems, the main solution is to use absorbing materials. The absorbing materials have the advantages of strong absorption, wide frequency band, thin thickness, good stability, and no pollution. They can convert electromagnetic radiation into heat energy to consume and ...

AI Technical Summary

Problems solved by technology

However, at present, the main preparation method of graphene and wave-absorbing materials is to simply add graphene to the wave-absorbing agent, and obtain a graphene-like wave-absorbing film through carbonization and graphitization, and the thermal conductivity of the graphene-like wave-absorbing film prepared by this method Low, the surface elasticity of the material is poor and fragile, and it is prone to fragmentation when used with devices. Therefore, the graphene-based wave-absorbing film prepared by this method has been hindered in practical applications, and the technology needs to be improved.