▎ 摘　　要

NOVELTY - Modified graphene is chemically modified with a phenyl-hydrazine derivative having a sulfo group. USE - Modified graphene is used for forming graphene sheets used in liquid compositions, molded products, and films used for electroconductive films (all claimed). ADVANTAGE - The modified graphene has excellent electroconductivity at low temperature, and provides graphene sheets which can be favorably dispersed in liquid compositions. The liquid composition forms films having large area. Since the graphene sheet has excellent solvent dispersibility, it can be mixed with various resins to form electroconductive composite. DETAILED DESCRIPTION - INDEPENDENT CLAIMS are included for the following: (1) modified graphene sheet obtained using modified graphene; (2) film comprising modified graphene sheet; and (3) manufacture of modified graphene, which involves expanding graphene oxide obtained by oxidizing graphite in solvent to obtain a dispersion liquid of graphene oxide, and adding phenyl-hydrazine derivative in the obtained dispersion liquid to react the derivative with graphene oxide.