Biodegradable Poly(3-hydroxybutyrate-co-3-hydroxyvalerate) Film Coated with Tannic Acid for Active Food Packaging

In recent years, there has been a growing concern about the environmental impact of plastics due to the rapid growth of packaging and disposable products. Among them, food packaging films are mostly made of synthetic polymers, which can be accumulated in natural environments and exacerbate environmental pollution. In this study, an eco-friendly food packaging film was prepared using poly(3-hydroxybutyrate-co-3-hydroxyvalerate) copolymer, a biodegradable aliphatic polyester produced from microorganisms. The film was fabricated using a simple hot-press process and dip-coated with tannic acid to provide antioxidant and antimicrobial properties that can prevent the food spoilage. The potential of the film to be used as a functional food packaging film was confirmed by packaging actual food products.