▎ 摘　　要

NOVELTY - The preparation method of lubricating additive involves taking graphene or graphene oxide raw material, and carrying out particle size adjustment on the graphene raw material by mechanical crushing or ultrasonically shearing and centrifugally separating, then adding surfactant and stirring to obtain dispersion-stable solution system and then spray drying to obtain spherical graphene powder material or spherical graphene oxide powder material. USE - The method is useful for preparing lubricating additive for preparing spherical graphene modified lubricating oil/fat or spherical graphene modified polymer composite material (claimed). ADVANTAGE - The method enables simple preparation of lubricating additive with excellent dispersion stability. DETAILED DESCRIPTION - An INDEPENDENT CLAIM is included for use of lubricating additive for preparing spherical graphene modified lubricating oil/fat or spherical graphene modified polymer composite material, where the application method involves carrying out reduction treatment of spherical graphene oxide powder or graphene oxide as raw material to obtain reduced graphene oxide spheres, and dispersing spherical graphene powder material in lubricating oil/fat or polymer matrix.