▎ 摘　　要

NOVELTY - Graphene dispersion comprises graphene, solvent and dispersant. The dispersant is p-sulfobenzoazochromic acid and/or carboxylic acid having phi - phi conjugated structure, and the solvent is water and/or alcohol material. USE - Used as graphene dispersion. ADVANTAGE - The method improves dispersibility of graphene in polymer matrix and enhances interfacial bonding force; and improves conductivity of graphene/polymer composites. DETAILED DESCRIPTION - INDEPENDENT CLAIMS are also included for: (1) preparing the graphene dispersion liquid comprising dispersing the graphene and the dispersant in the solvent; and (2) graphene/polymer composite material obtained by in-situ polymerization reaction of the dispersant in the graphene dispersion liquid and a polymer monomer, where the polymer is polyester-based substance and polyamide-based substance.