▎ 摘　　要

NOVELTY - Functionalizing nano-graphene oxide surface polymer comprises e.g. (i) preparing graphene oxide from natural graphite powder through improved hummers method; (ii) adding polyethylene glycol monomethyl ether into a reaction kettle and dissolving in solvent A, adding pyrene acid and filtrate 1,3-dicyclohexylcarbodiimide to pyrene acid, adding catalyst 4-dimethylamino pyridine, filtering, precipitating, and vacuum drying to obtain polyethylene glycol having pyrene end groups; and (iii) placing graphene oxide in N,N-dimethylformamide and dispersing ultrasonically to obtain graphene oxide solution. USE - The method is useful for functionalizing nano-graphene oxide surface polymer. ADVANTAGE - The method is simple and direct; and accelerates the development of graphene oxide-based materials. DETAILED DESCRIPTION - Functionalizing nano-graphene oxide surface polymer comprises: (i) preparing graphene oxide from natural graphite powder through an improved hummers method; (ii) adding polyethylene glycol monomethyl ether into a reaction kettle, dissolving in solvent A, adding pyrene acid 1-2 times of the polyethylene glycol monomethyl ether, dissolving the polyethylene glycol monomethyl ether, orderly adding filtrate 1,3-dicyclohexylcarbodiimide (molar number is 1.1-2 times) to the pyrene acid, adding catalyst 4-dimethylamino pyridine (molar number is 0.05-0.1 times of the carboxylic acid group) at 10-40 degrees C for 24-48 hours, filtering, precipitating with diethyl ether, and vacuum drying to obtain polyethylene glycol having pyrene end groups; and (iii) placing the graphene oxide in N,N-dimethylformamide, and dispersing ultrasonically to obtain graphene oxide solution (1-5 mg/ml), which is uniformly diffused, and then adding the polyethylene glycol having pyrene end group (0.1-1g) obtained in the step (i), continuing ultrasonic dispersion, removing the solvent A by rotary evaporating, precipitating with methanol and vacuum drying to obtain the graphene oxide of polyethylene glycol polyethylene glycol having non covalent bond pyrene end groups.