▎ 摘　　要

NOVELTY - Method for preparing highly dispersed graphene composite material involves (i) dissolving polymer with a viscosity average molecular weight of 10000 or more in a corresponding solvent to obtain a polymer solution, where the polymer comprises polyamide, polyester, or polyether that is chemically degradable, (ii) adding a corresponding degrading agent to the polymer solution under stirring condition to degrade the polymer to reduce its viscosity average molecular weight to below 2000 to obtain a short-chain polymer solution, (iii) uniformly dispersing graphene in the same solvent as step (i) to obtain a graphene dispersion, (iv) adding graphene dispersion to short-chain polymer solution, and stirring at room temperature to fully adsorb the short-chain polymer onto the graphene sheet, and drying to obtain the product. USE - The method is useful for preparing highly dispersed graphene composite material (claimed). ADVANTAGE - The method obtains the composite material with short-chain polymer adsorbed on surface, and is carried out in a water system which is not limited to a water system, simple, easy to control, economical, and suitable for large-scale industrial production. The composite material prevents the agglomeration and stacking of graphene sheets, achieves the purpose of improving the dispersion, and has the advantage of not relying on the restriction of the polymer matrix structure, and highlights the structural advantage of graphene as a two-dimensional nanomaterial with a large specific surface area.