Protein-phenolic interactions: Effects on the properties of biopolymer films

The targeted search for sustainable and safe packaging materials increases the interest in biopolymer films derived from natural ingredients. This study analyses the potential of protein-phenolic complexes as a material for the creation of multifunctional and environmentally friendly biopolymer films. The protein-phenolic complexes used in the study are of soy protein isolate and pomegranate peel polyphenol extract in three different ratios of the constituent components. The resulting films were analysed for physicochemical and mechanical properties and bioactive functionality. The results show that the protein-phenolic complexes can be used as a basis for obtaining biopolymer films, consistent with the goals of sustainable development of biodegradable and functional packaging and systems for the needs of the food and pharmaceutical industries.