▎ 摘　　要

NOVELTY - Method for preparing functionalized graphene involves adding flake graphite and amphiphilic diene or diene body to an organic solvent for blending in an inert environment, stirring to obtain a mixed solution, placing the mixed solution in a liquid-phase mechanical peeling device for synchronous peeling and reacting to obtain a peeling reaction solution, and directly subjecting the reaction liquid to thermal insulation treatment in a liquid-phase mechanical peeling device to prepare functionalized graphene. USE - The method is used for preparing functionalized graphene. ADVANTAGE - The method has liquid-phase mechanical peeling which is combined with Diels alder reaction to sheared flake graphite under action of mechanical force, and is one-step method, simple and efficient.