Chitosan-polyvinyl alcohol hydrogel films containing polyphenols-encapsulated ZIF-8 for pH-responsive freshness monitoring and preservation of pork.
We developed a biodegradable hydrogel-based packaging film from chitosan and polyvinyl alcohol. The film was integrated with epigallocatechin gallate, curcumin, or anthocyanins encapsulated in zeolitic imidazolate framework-8. Due to the synergistic effects between ZIF-8 and polyphenols, the films had enhanced mechanic...