Edible refrigerated aquatic product fresh-keeping film prepared from walnut green seedcases and preparation method and applications thereof

The invention discloses an edible refrigerated aquatic product fresh-keeping film prepared from walnut green seedcases and a preparation method and applications thereof. Te preparation method comprises following steps: adding chitosan into an acetic acid solution to obtain a chitosan solution; adding a walnut green seedcase extract into a gelatin solution to obtain a mixed solution; adding the mixed solution into the chitosan solution, evenly mixing to obtain a liquid to be processed, adding a plasticizing agent into the liquid, heating the liquid, carrying out ultrasonic degassing to obtain a fresh film liquid; tape-casting the fresh film liquid, drying, sealing, and allowing the fresh film liquid to stand still to obtain the fresh-keeping film. The provided preparation method has the advantages of simple operation, low technical requirements, and high production adaptability. The provided edible refrigerated aquatic product fresh-keeping film prepared from walnut green seedcases has a prominent antibacteria