Edge-grafting-modified graphene, aqueous dispersion thereof, and preparation methods therefor

Abstract

An edge-grafting-modified graphene, an aqueous dispersion thereof, and a preparation method therefor are provided. The edge-grafting-modified graphene includes graphene and a water-soluble high-molecular polymer grafted on the edge of the graphene. On the basis of the total mass of the edge-grafting-modified graphene, the mass content of the water-soluble high-molecular polymer grafted in the edge-grafting-modified graphene is 1-30%. Compared with milling techniques such as ultrasound milling, ball milling and sand milling, milling discs have a weak damage effect on the crystal structure of graphite and therefore can easily prepare large lamellar graphene. Additionally, the water-soluble high-molecular polymer can improve the viscosity of a solution and thus indirectly transfer a shearing force between milling discs to graphite flakes, thereby further lowering the damage to crystal lattices of graphite and improving the exfoliation effect of the graphite flakes.

Dependencies are inferred from the claim text.