▎ 摘　　要

NOVELTY - The preparation method of functionalized graphene involves (1) dissolving intercalation agent in deionized water, and uniformly mixing to obtain intercalation agent solution, where the intercalation agent is a water-soluble surfactant, and the surface tension of the intercalation agent solution is plus minus 10 mJ/m2 of the surface tension of graphite, (2) adding graphite powder to the intercalation agent solution, and uniformly mixing to obtain graphite powder suspension with concentration of 10-30 %mass, (3) adding dienophile to the graphite powder suspension to obtain graphite powder/dienophile suspension, (4) passing the graphite powder/dienophile suspension by micro-jet homogenizer under a pressure of 80-200 MPa, and performing circulating process to obtain suspension (I), and (5) filtering the suspension (I), washing, and separating from the liquid to obtain functionalized graphene which is a graphene in which a dienophile molecular group is grafted onto the graphene sheet. USE - Preparation method of functionalized graphene. ADVANTAGE - The method enables preparation of functionalized graphene with high efficiency.