▎ 摘　　要

NOVELTY - Preparing graphene oxide composite film material having fixed orientation comprises (i) melt blending maleic anhydride grafted polypropylene and graphene to obtain graphene oxide dispersed composite material, and (ii) placing composite material in open mill to open processing, film forming by each open-time folding in the same direction, and open refining the film. USE - The composite film material is useful in preparing barrier layer of fuel tank (claimed). ADVANTAGE - The composite film material has high barrier property, excellent adhesiveness and low cost. DETAILED DESCRIPTION - An INDEPENDENT CLAIM is also included for graphene oxide composite film material having fixed orientation obtained by above method.