▎ 摘　　要

NOVELTY - Oil-soluble modified graphene oxide compound, is claimed. At least one carboxy group of graphene oxide becomes group-C(=O)-O-(CH2)p-(NH)q-Q, at least one carboxy group becomes the group -C(=O)-NH-(CH2)j-O-Q, and at least one epoxy or hydroxy group becomes the group -OQ. USE - The compound is useful in preparing antiwear additive for fluorinated lubricating oil and fluorinated lubricating grease (claimed); and as lubricant for space machinery; and for special lubrication under harsh conditions including aviation and computer industries. ADVANTAGE - The compound has better antiwear performance and extreme pressure performance compared with the existing modified products. DETAILED DESCRIPTION - Oil-soluble modified graphene oxide compound, is claimed. At least one carboxy group of graphene oxide becomes group-C(=O)-O-(CH2)p-(NH)q-Q, at least one carboxy group becomes the group -C(=O)-NH-(CH2)j-O-Q, and at least one epoxy or hydroxy group becomes the group -OQ. p = 1-99, preferably 1-50, preferably 10-20; q = 0 or 1; j = 1-4; Q = K type, Y type, Z type or D type perfluoropolyether acyl of formulae (I)-(IV); m1/n1 = 0.2-25; m2/n2 = 0.2-25; n3 = 1-40, preferably 5-10; and n4 = 1-40, preferably 5-10. Provided that: The perfluoropolyether acyl groups represented by Q are the same or different. INDEPENDENT CLAIMS are also included for: (1) preparing compound comprising (i) reacting graphene oxide with perfluoropolyether alcohol of formula (Q-(NH)q-(CH2)p-OH), and (ii) adding NH2-(CH2)j-OH and 1-ethyl-3-(3-dimethylaminopropyl)carbodiimide/N,N'-dicyclohexylcarbodiimide to react, and then adding perfluoropolyether acyl fluoride to react; (2) lubricating oil, comprising the compound, preferably the content of the compound in the lubricating oil is 10 parts per million to 5%; and (3) grease, comprising the compound, preferably the content of the compound in the grease is 10 parts per million to 5%.