Journal
POLYMERS
Volume 11, Issue 2, Pages -Publisher
MDPI
DOI: 10.3390/polym11020368
Keywords
sodium trimetaphosphate; chitosan/methylcellulose composite film; antibacterial activity; physicochemical property; food packaging
Categories
Funding
- National Natural Science Foundation of China [51603153]
- China Postdoctoral Science Foundation [2018T110805, 2016M602348]
- Natural Science Foundation of Hubei Province [2017CFB656]
- Fundamental Research Funds for the Central Universities [2042017kf0015]
- Large-Scale Instrument and Equipment Sharing Foundation of Wuhan University
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Environmentally friendly food packaging currently attracts much interest. Sodium trimetaphosphate (STMP) finds specialized applications in food, but it is rarely used as a crosslinking agent. In this study, STMP was used as a crosslinking agent to prepare chitosan/methylcellulose composite films. Both antibacterial and physicochemical properties of the composite film were improved by crosslinking with STMP. The crosslinked films, with good antibacterial activity (similar to 99%), had increased tensile strength, a higher elongation at break, a lower swelling ratio and solubility, and a lower enzymatic degradation than the non-crosslinked films. Furthermore, the crosslinked films showed an excellent preservative effect on fresh-cut wax gourd after three days at room temperature. The obtained films crosslinked by STMP can be potentially applied to the food industry, such as food functional packaging, providing a novel alternative to traditional plastic packages.
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