Research progress on preparation method and application in food packaging of gelatin-based composite films
Gelatin-based composite films have been widely used in food packaging due to their excellent mechanical properties,barrier properties,antioxidant and antimicrobial activities.In this review,the properties and advantages of gelatin were summarized.The preparation methods,including solution casting,melt extrusion,film coating and electrostatic spinning,of gelatin-based composite films were described,and the effect of different plasticizers on gelatin-based film was analyzed.The research process on gelatin-based composite films was then reviewed,including the composite systems of gelatin with carbohydrates,phenolic compounds,proteins and nanomaterials,while the application of gelatin-based films in fruit and vegetable preservation,meat preservation and other food products was discussed.Finally,a brief outlook on the development of gelatin-based composite films in the field of food packaging was given to provide reference for the development and utilization of green,high performance and multi-functional gelatin-based films.
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