Sodium selenite/selenopeptide chitosan antioxidant film for postharvest preservation of grape
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Published on: April 7, 2017
Li Li1,2, Shushu Pu1,2, Zhixuan Fan1,2
1College of Food Science and Engineering, Shanxi Agricultural University, Shanxi Taigu 030801, China.
Abstract:
Chitosan is an excellent alternative to plastic, a natural polymer that is non-toxic, biodegradable, and biocompatible. However, chitosan film exhibits relatively poor mechanical properties. Therefore, the films were successfully modified by deep eutectic solvents, and the effects and mechanisms of sodium selenite and selenopeptides, at concentrations of 0.25% and 0.4%, on the characteristics of chitosan films were comprehensively studied. The evaluation of film properties was supported by Fourier transform infrared spectroscopy, X-ray diffraction, and scanning electron microscopy.Significant improvements in the films' UV absorption and shielding abilities were observed by incorporating sodium selenite and selenopeptides. The addition of sodium selenite and selenopeptides significantly enhanced the antioxidant and antibacterial properties.The combination of chitosan with sodium selenite and selenopeptides provides a strategy for simultaneously reinforcing mechanical, UV-protective, antioxidant, and antimicrobial characteristics. Such multifunctionality supports the potential expansion of chitosan films into advanced packaging applications.
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