▎ 摘　　要

NOVELTY - Preparation of stable dispersion of graphene, involves reacting graphene oxide dispersion with an excess amount of reducing and stabilizing agent. The reducing and stabilizing agent is an amine compound (I). USE - Preparation of stable dispersion of graphene used as coolant in industries and solar thermal generation. ADVANTAGE - The stable dispersion of graphene is prepared with high productivity by simple and environmentally-friendly process. DETAILED DESCRIPTION - Preparation of stable dispersion of graphene, involves reacting graphene oxide dispersion with an excess amount of reducing and stabilizing agent. The reducing and stabilizing agent is an amine compound of formula: N(H).(CaHbX)m (I). a=2 or more; b=4 or more; n,m=1 or 2; n+m=3;and X=group capable of forming hydrogen bonding with solvent of graphene oxide dispersion.