GRAPHENE NANOSHEET DISPERSION AND PREPARATION METHOD THEREFOR

摘要

Provided are a graphene nanosheet dispersion and a preparation method therefor. In the dispersion, the graphene nanosheet has a thickness of 0.35 - 7 nm, and is dispersed in a solvent in the form of a single layer or multiple layers. The preparation method comprises the following steps: (1) mixing graphite with a solid polymer proportionally, and grinding mechanically to obtain a mixed powder of graphene nanosheets/solid polymer; (2) adding the mixed powder of graphene nanosheets/solid polymer into a solvent capable of dissolving the polymer, so as to obtain an intermediate of graphene nanosheet dispersion; and (3) removing the solid polymer dissolved in the solvent from the obtained intermediate of the dispersion, so as to obtain the graphene nanosheet dispersion. The polymer is used as a dispersion phase in the method and promotes the stripping of graphite during grinding so as to effectively inhibit the obtained graphene nanosheets from reaggregation. The method is simple and has a low cost.