Graphene composite material and preparation method thereof

Abstract

The invention discloses a graphene composite material and a preparation method thereof. The graphene composite material is prepared from the following components in parts by weight: 50 parts by weight of graphene, 25 to 29 parts by weight of polycarbonate, 5 to 9 parts by weight of 1-ethyl-3-methylimidazoleonium tetrafluoroborate, 32 to 36 parts by weight of nickel sulfate, 2 to 6 parts by weight of acetonitrile, 38 to 42 parts by weight of polyvinyl alcohol, 7 to 9 parts by weight of cellulose grafted acrylamide polymer, 16 to 22 parts by weight of starch-polyacrylate grafted copolymer, 7 to 9 parts by weight of polyacrylic acid-acrylonitrile, 20 to 24 parts by weight of potassium permanganate, 3 to 5 parts by weight of tungsten carbide and 4 to 6 parts by weight of high-strength carbon fibers. The preparation method disclosed by the invention has the advantages of high yield, no pollution and uniform graphitization; in addition, the graphitization degree is improved; the graphene composite material has the characteristics of excellent superconducting electrical properties, heat dissipation performance, superhigh toughness, light weight, high-temperature resistance, flame-retardant property, anti-oxidation property, acid and alkali resistance, mechanical damage resistance and the like.

Description

Technical field [0001] The invention relates to the technical field of carbon materials, in particular to a graphene composite material and a preparation method thereof. Background technique [0002] Graphene is a two-dimensional crystal with a thickness of only one layer of carbon atoms, which is exfoliated from graphite materials. In 2004, physicists Andre Gaim and Konstantin Novoselov of the University of Manchester in the United Kingdom successfully separated graphene from graphite and confirmed that it can exist alone, and the two also jointly won the 2010 promise. Bell Prize in Physics. Graphene is not only the thinnest material, but also the strongest material, and its fracture strength is 200 times higher than the best steel. At the same time, it has good elasticity, and the stretching range can reach 20% of its own size. It is currently the thinnest and strongest material in nature. If a piece of graphene with an area of ​​1 square meter is used to make a hammock, its...

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Problems solved by technology

On the other hand, it is so dense that even the tiniest gas atoms (helium atoms) cannot penetrate