▎ 摘　　要

NOVELTY - Preparing water-oxygen barrier flexible film, comprises (i) mixing 2-amino-2-(hydroxymethyl)propane-1,3-diol hydrochloride buffer solution and dopamine to obtain mixed solution, (ii) immersing polymer film substrate in the mixed solution to obtain polymer composite film, and (iii) dispersing the graphene oxide nano-sheet layer to obtain dispersion liquid, then adding the polymer composite film in dispersion liquid to obtain water-oxygen barrier flexible film. USE - The flexible film is useful in packaging of flexible electronic devices (claimed). ADVANTAGE - The method: utilizes adhesion effect and reduction characteristics of dopamine to improve water blocking performance of the film; has improved preparation efficiency and preparation safety; and does not uses hazardous chemicals. The flexible film has simple preparation process; and is suitable for industrial production. DETAILED DESCRIPTION - An INDEPENDENT CLAIM is also included for water-oxygen barrier flexible film, comprising at least a graphene oxide nano-sheet layer, at least a polydopamine layer, and a polymer film substrate layer, which are sequentially disposed.