▎ 摘　　要

NOVELTY - Preparing medical packaging film with high barrier property comprises (i) taking carboxymethyl cellulose and deionized water, adding acetic anhydride, adding modified titanium dioxide-graphene oxide composite, drying to obtain modified titanium dioxide-carboxymethyl cellulose composite, (ii) taking polyhydroxyl butyric acid valeric acid copolyester and chloroform, obtaining polyhydroxyl butyric acid valeric acid copolyester solution, obtaining modified zinc oxide-carboxymethyl cellulose composite solution, adding modified zinc oxide-carboxymethyl cellulose composite solution to polyhydroxyl butyric acid valeric acid copolyesters solution, and obtaining polyhydroxyl butyric acid valeric acid copolyesters film, and (iii) coating epoxy resin adhesive on one side of aluminum foil, compounding polyhydroxyl butyric acid valeric acid copolyester film and side coated with epoxy resin adhesive, and compounding polyhydroxyl butyric acid valeric acid copolyester side of film A. USE - The method is useful for preparing medical packaging film with high barrier property. ADVANTAGE - The method: controls the mass ratio of carboxymethyl cellulose, acetic anhydride, and modified titanium dioxide graphene compound; improves interfacial compatibility between carboxymethyl cellulose and polyhydroxyl butyric acid valeric acid copolyester; enhances mechanical properties of packaging film; and endows the packaging film with excellent barrier properties. The film: has biocompatibility; and is environmentally friendly. DETAILED DESCRIPTION - Preparing medical packaging film with high barrier property comprises (i) taking carboxymethyl cellulose and deionized water, stirring at 50-60°C for 40-60 minutes, adding acetic anhydride, stirring at 70-80°C for 1.5-2 hours, stopping stir, adding modified titanium dioxide-graphene oxide composite, ultrasonically dispersing for 3-5 hours, centrifuging, washing, and drying to obtain a modified titanium dioxide-carboxymethyl cellulose composite, (ii) taking polyhydroxyl butyric acid valeric acid copolyester and chloroform, uniformly stirring at 66-72°C to obtain polyhydroxyl butyric acid valeric acid copolyesters solution, taking the modified titanium dioxide-carboxymethyl cellulose composite and chloroform, uniformly stirring at 30-40°C to obtain a modified zinc oxide-carboxymethyl cellulose composite solution, adding the modified zinc oxide-carboxymethyl cellulose composite solution to polyhydroxyl butyric acid valeric acid copolyesters solution, and casting into film to obtain polyhydroxyl butyric acid valeric acid copolyesters film, and (iii) coating epoxy resin adhesive on one side of the aluminum foil, compounding polyhydroxyl butyric acid valeric acid copolyester film and side coated with epoxy resin adhesive, coiling to obtain film A, coating epoxy resin adhesive on one side of polyamide film, compounding polyhydroxyl butyric acid valeric acid copolyester side of film A with one side of polyamide film coated with epoxy resin adhesive, and rolling to obtain the finished product. An INDEPENDENT CLAIM is also included for a medical packaging film with high barrier property prepared by the above-mentioned method.