▎ 摘　　要

NOVELTY - Preparation of oxidation graphene-perfluorocarboxylic acid composite film involves mixing graphene oxide and perfluorocarboxylic acid, dispersing to obtain composite suspension, adjusting the pH value of the suspension, leaving, and drying. USE - Preparation of oxidation graphene-perfluorocarboxylic acid composite film used for preparing liquid lens material (all claimed). ADVANTAGE - The preparation method mainly focuses on dispersing, adjusting pH value, leaving and drying. The whole operation is simple, and the flow is short. The prepared oxidized graphene-perfluorocarboxylic acid composite film overcoming the liquid lens performance unstable defect in electric field or high-temperature environment, and improves the stability and reliability of the liquid lens. DETAILED DESCRIPTION - INDEPENDENT CLAIMS are included for the following: oxidized graphene-perfluorocarboxylic acid composite film, which has water contact angle of less than 40°, and oil contact angle of greater than 110°; and liquid lens.