Abstract: Nano-chitosan is a kind of nanoparticles prepared from chitosan which showed excellent antibacterial and antioxidant properties and broad application potentials in food preservation. The preparation methods of nano-chitosan, such as ion crosslinking, emulsion crosslinking and spray drying were briefly introduced in this article, and the characteristics of the three methods were summarized. Furthermore, the effects and advantages of nano-chitosan on the preservation of fruits, vegetables, meat and other foods were reviewed. Finally, the research of nano-chitosan provided a reference for its further application in food preservation.
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