▎ 摘　　要

NOVELTY - Multi-functional graphene/polyethylene terephthalate composite film is claimed. The composite film is obtained by melt-film-forming mixture of 100 pts. wt. graphene/polyethylene terephthalate nanocomposite material and 0-10 pts. wt. auxiliary agent, where graphene/polyethylene terephthalate nanocomposite material consists of single layer of graphene sheet and polyethylene terephthalate, and surface of graphene sheet is linked to polyethylene terephthalate molecule by covalent bond. USE - The composite film is useful for ultravoilet protection film, food packaging and protective membrane. ADVANTAGE - The composite film has low cost and superior performance; and improves production efficiency; has simple and effecient method. DETAILED DESCRIPTION - An INDEPENDENT CLAIM is also included for preparing multi-functional graphene/polyethylene terephthalate composite film comprising mixing 100 pts. wt. graphene/ polyethylene terephthalate nanocomposite and 0-10 pts. wt. auxiliary agent, melt casting to obtain final product.