Preparation method and application of graphene composite material

Abstract

The invention belongs to the technical field of graphene composite materials, in particular to a preparation method and application of a graphene composite material. The preparation method of the graphene composite material comprises the following steps that a substrate powder body is placed into a plasma gaseous phase deposition device, under a vacuum environment, working gas is led into a plasma generation area to enable a carbon source to be loaded into the plasma generation area, and three-dimensional graphene is obtained on the surface of a metal powder body within 0.1-1 hour; and the substrate powder body is the metal powder body or a nonmetal powder body, the metal powder body comprises one or more of aluminum powder, nickel powder, copper powder and titanium powder, and the nonmetal powder body comprises one or more of silicon carbide powder and quartz. According to the method, the graphene can be directly prepared on a metal powder body substrate or a nonmetal powder body substrate, no complex pre-treatment technology and high-temperature process is needed, and the treatment working procedure is more simplified and has compatibility; and a concise method is provided for preparation of a carbon-coated composite material, and the preparation method is suitable for large-scale production.

Description

technical field [0001] The invention belongs to the technical field of graphene composite materials, and in particular relates to a preparation method and application of graphene composite materials. Background technique [0002] Graphene, as a new material with great research value and application prospect, has attracted extensive attention of researchers. In the past ten years, researchers have conducted extensive and in-depth research on the physical and chemical properties of graphene, such as its mechanics, heat, electricity, magnetism, optics, acoustics and corrosion resistance, etc. Graphene's sp2 orbital hybridization and two-dimensional thin-layer structure, graphene and graphene-like materials exhibit ultra-high strength, excellent thermal conductivity and electrical conductivity, light transmittance, and flexibility and light weight. With the above unique physical properties, graphene has broad application prospects in the fields of energy, environment, biotechno...

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Problems solved by technology

[0005] 1) Graphene is not easy to disperse evenly. Graphene microsheet materials have a large specific surface area, which leads to easy agglomeration and reduced surface energy during the dispersion process; 2) It is not easy to prepare composite materials with high graphene content due to graphene in the dispersion process. Huizhong is easy to reunite, so the amount of dispersed graphene is limited, which in turn causes the graphene content in the composite material to be generally low, so that the excellent performance of graphene cannot be fully exerted; 3) The interface reaction is serious. Use pure Al or low alloy The Al alloy with high element content is used as the matrix, and the heating and holding time of the preparation process are too long, which leads to a heavy interfacial reaction between graphene and the matrix, forming Al 4 C 3 The brittle phase affects the material properties; 4) The preparation process is relatively simple. The sintering method is the most basic method for preparing graphene-reinforced aluminum matrix composites, and the materials prepared by the sintering method are often not dense enough, and the interface bonding is not good enough.

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