▎ 摘　　要

NOVELTY - The preparation method of polyethylene terephthalate masterbatch involves mixing graphene having high Brunauer-Emmett-Teller specific surface area with polyethylene terephthalate to get polyethylene terephthalate/graphene mixture, and then pelletizing to obtain product. USE - The method is useful for preparing polyethylene terephthalate masterbatch (claimed). ADVANTAGE - The method prepares polyethylene terephthalate masterbatch with high conductivity and strength. DETAILED DESCRIPTION - INDEPENDENT CLAIMS are included for the following: (1) polyethylene terephthalate masterbatch prepared by the above preparation method; (2) polyethylene terephthalate masterbatch, which comprises graphene with specific surface area of greater than 400 m2/g, and polyethylene terephthalate, where the polyethylene terephthalate is intimately mixed with graphene; and (3) preparing graphene with high Brunauer-Emmett-Teller specific surface area, which involves mixing graphite and concentrated sulfuric acid, adding potassium permanganate to get graphene oxide, controlling the temperature at less than 8 degrees C during the whole addition step, adding water, heating at 60-80 degrees C, heat preserving for 2 hours, adding hydrogen peroxide after heating is finished, stirring to obtain graphene stock solution, and carrying out high-temperature reduction on graphene stock solution at 800-1200 degrees C to obtain product having specific surface area of greater than or equal to 400 m2/g.