▎ 摘　　要

NOVELTY - Graphene dispersion sol comprises 10-40 wt.% graphene particles, 0.1-20 wt.% cationic surfactant containing hydroxy-functional carboxylic acid ester having pigment affinity group as first dispersant, 0.1-20 wt.% anionic surfactant comprising modified acrylate block copolymer as second dispersant, and 40-80 wt.% solvent comprising ketone-based or propanol-based solvents. The graphene dispersion sol has average particle size of 100-1000 nm. USE - The graphene dispersion sol is useful as coating agent of heat-radiating film (all claimed). ADVANTAGE - The graphene dispersion sol minimizes dispersion time, prevents aggregation of graphene, has excellent dispersibility and economical efficiency. DETAILED DESCRIPTION - An INDEPENDENT CLAIM is also included for producing graphene dispersion sol, comprising (a) mixing graphene particles, cationic surfactant, anionic surfactant, and solvent, and (b) dispersing the mixture.