▎ 摘　　要

NOVELTY - Preparation of modified graphene, involves dispersing graphene in solvent to obtain dispersion (I), adding modifying agent to dispersion (I), mixing uniformly, reacting to obtain dispersion (II), separating obtained dispersion to obtain solid and carrying out post-treatment with obtained solid. The modifying agent is 10-16C polycarbonate. USE - Preparation of modified graphene used in lubricating oil composition. ADVANTAGE - The method enables preparation of modified graphene with excellent dispersibility and anti-settling performance. The graphene has excellent compatibility with hydrocarbon groups in lubricating oil. The preparation method is simple.