High-thermal-conductivity laminated graphene composite material and preparation method thereof

Abstract

The invention discloses a high-thermal-conductivity laminated graphene composite material, and a preparation method thereof. The high-thermal-conductivity laminated graphene composite material comprises reduced graphene oxide, oxidized cellulose nanocrystalline, and epoxy resin; possesses a laminated structure which is mainly alternatively composed of reduced graphene oxide layers and oxidized cellulose nanocrystalline / epoxy resin layers; the oxidized cellulose nanocrystalline / epoxy resin layer is a mixture of oxidized cellulose nanocrystalline and the epoxy resin; the mass ratio of reduced graphene oxide to oxidized cellulose nanocrystalline is controlled to be 2:1-1:9; the mass ratio of reduced graphene oxide to epoxy resin is controlled to be 6:1-1:15. According to the preparation method, modification on the internal composition and the structure of the high-thermal-conductivity laminated graphene composite material, the whole process technology design and the steps of the preparation method is carried out, solvent volatilization self assembling is adopted to prepare the high-thermal-conductivity laminated graphene composite material, so that problems in the prior art such as small graphene composite size and poor thermal conductivity are solved, and the thermal conductivity of the high-thermal-conductivity laminated graphene composite material is capable of reaching 9 to 30W*m<-1>*K<-1>.

Description

technical field [0001] The invention belongs to the technical field of composite materials, and more specifically relates to a high thermal conductivity layered graphene composite material and a preparation method thereof. Background technique [0002] Graphene is a carbon atom with SP 2 The two-dimensional single-layer sheet-like nanomaterials formed by the close arrangement of the hybridization method have attracted extensive attention in the field of new materials and special materials because of their excellent electrical and thermal conductivity, mechanical properties and optical transparency. Reduced graphene oxide is a derivative of graphene, which is prepared by a chemical redox method. It has the characteristics of low cost, large output, high efficiency, and simple process, and is suitable for large-scale preparation and application. Compared with graphene oxide, reduced graphene oxide has excellent electrical and thermal conductivity due to its regular structure....

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Problems solved by technology

[0005] In view of the above defects or improvement needs of the prior art, the object of the present invention is to provide a high thermal conductivity layered graphene composite material and a preparation method, wherein the internal composition and structure of the composite material and the overall flow process of the corresponding preparation method The design and parameter conditions of each step (such as the type and ratio of reaction raw materials, reaction temperature and time, etc., especially for the solvent evaporation treatment step and curing step) are improved, and the high thermal conductivity layered graphene composite is prepared by self-assembly of solvent volatilization Material, the layered graphene composite material product that obtains can effectively solve the problem such as graphene composite material size is little, thermal conductivity is bad compared with prior art, its thermal conductivity of high thermal conductivity layered graphene composite material in the present invention Up to 9~30W.m -1 .K -1 , and the thickness can reach 8000 mm; the preparation method is simple and efficient

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