▎ 摘　　要

NOVELTY - Compact graphene comprises a hydroxyl graphene functionalized with silane, and 40-99 wt.% thermosetting polymer. USE - Compact graphene used as overcoat painting (claimed). ADVANTAGE - The compact graphene has superior mechanical properties such as Young's modules, tensile and flexural strength and degradation properties required for specific applications in architecture and engineering. DETAILED DESCRIPTION - An INDEPENDENT CLAIM is included for a method for preparing compact graphene, which involves: (A) obtaining the hydroxyl graphene from graphite; (B) silanizing obtained hydroxylate graphene with sonication and mechanical agitation; (C) dispersing the precursor of the thermosetting polymer into the silane-functionalized hydroxylate graphene by mechanical agitation and sonication, and polymerizing; and (D) curing by thermal treatment of the obtained product.