▎ 摘　　要

NOVELTY - Method for preparing multi-layer composite barrier film based on reduced graphene oxide, involves configuring polyetherimide/graphene oxide mixed solution, where the control condition causes polyetherimide to restore graphene oxide to reduced graphene oxide, removing excess polyetherimide by suction filtration, re-dissolving polyetherimide/reduced graphene oxide mixture in solvent, and using layer-by-layer sol-gel method to obtain reduced graphene oxide/polyetherimide composite film having multi-layer brick wall structure on substrate. USE - The method is used for preparing multi-layer composite barrier film based on reduced graphene oxide used as packaging material (claimed). ADVANTAGE - The method can effectively reduce the content of hydrophilic polyethyleneimine in composite film and prepares the multi-layer composite barrier film with low polyethyleneimine content and high performance based on reduced graphene oxide.