▎ 摘　　要

NOVELTY - A hydroxyl functional group-bonded graphene oxide sheet comprises a graphene oxide sheet whose surface is bonded with one or more hydroxyl-containing functional groups (1). USE - Hydroxyl functional group-bonded graphene oxide sheet is used in dispersion for antifreeze solution (all claimed). DETAILED DESCRIPTION - A hydroxyl functional group-bonded graphene oxide sheet comprises a graphene oxide sheet whose surface is bonded with one or more hydroxyl-containing functional groups of formula (1). R=1-10C alkylene. INDEPENDENT CLAIMS are included for the following: (1) preparation of hydroxyl functional group-bonded graphene oxide sheet, which involves mixing a solution (s1) comprising a solvent and a graphene oxide sheet having an epoxy group bonded to its surface, with a solution (s2) comprising a glycol compound and a basic compound, and reacting; (2) dispersion, which comprises a solvent and hydroxyl functional group-bonded graphene oxide sheet dispersed in the solvent; and (3) antifreeze solution, which comprises a solvent, the hydroxyl functional group-bonded graphene oxide sheet and an additive chosen from anticorrosive agent, antifoaming agent and pH modifier.