Method for preparing antioxidation gelatine membrane containing tea polyphenol-chitosan nano grain

The invention relates to a preparation of oxidation resistant gelatin film containing tea polyphenol-chitosan nano granule, pertains to the field of applying chitosan controlled release and oxidation resistance in the gelatin film. The oxidation resistant gelatin film component comprises tea polyphenol-chitosan nano granules, gelatin and glycerin. The preparation includes dissolving gelatin and glycerin into deionized water in proportion to produce a gelatin solution, charging a predetermined amount of tea polyphenol-chitosan nano granule suspension, mixing uniformly, hypersonic de-gassing, removing dried film spreading on the organic glass board. The prepared nano tea polyphenol-chitosan gelatin film has oxidation resistance greatly improved comparing with the simple gelatin film phase, and oxidation resistance of the gelatin film is capable of lasting for longer time due to protection function of the chitosan to the tea polyphenol and slowly-releasing of the tea polyphenol. The oxidation resistant gelatin film can be biologically degraded, without environment pollution during application process; is capable of having functions of preventing loss of flavor substance in the food, preventing food oxidation, so as to reach the effect of anti-staling and prolonging storage period.