▎ 摘　　要

NOVELTY - Preparing biodegradable packaging film involves taking thiolated graphene and deionized water, ultrasonically dispersing for 40-50 minutes to obtain a graphene dispersion liquid, adding acetylated starch and photoinitiator to the graphene dispersion, stirring for 20-30 minutes, and irradiating with UV light for 30 to 40 hours to obtain solution A, taking epoxidized starch, corn starch and deionized water, mixing uniformly to obtain starch solution, mixing them uniformly to obtain a starch solution, adding solution A, cellulose and cross-linking agent, stirring for 1-2 hours to obtain a film casting liquid, taking the film casting liquid, casting the film to form a film, and drying to obtain a packaging film. USE - Preparation method of biodegradable packaging film used in raw material, research development and production applications. ADVANTAGE - The packaging film has excellent barrier property, green and environment-friendly, and can be widely applied to food fresh-keeping, transportation and packaging field. The solution is introduced with the oxidation graphene and cellulose, the sheet structure of the oxidized graphite can effectively block the permeation of water vapour and oxygen. The cellulose is filled and cross-linked in the starch film to improve the compactness of the film layer, the cellulose and oxidation graphene matched with each other, and the product has better barrier property and water resistance. DETAILED DESCRIPTION - An INDEPENDENT CLAIM is included for a biodegradable packaging film