Active Biodegradable Polyvinyl Alcohol–Hemicellulose/Tea Polyphenol Films with Excellent Moisture Resistance Prepared via Ultrasound Assistance for Food Packaging

Poor water-vapor barriers and mechanical properties are common problems of biobased films. To maintain food quality, the barrier its strength performance need to be improved. Tea polyphenols (TP) a natural active substance, their benzene ring structure provides for them as film material. Films that incorporate TP also have enriched functionalities, e.g., antioxidants. Here, poly (vinyl alcohol) (PVA)-hemicellulose (HC)/TP films with good moisture resistance antioxidant capacity were prepared via ultrasound assistance. The effects incorporation ultrasonication on physical, antioxidant, micromorphological investigated. Results showed addition improved thermal stability permeability (WVP) composite When PVA-HC/TP PVA-HC mass ratio 100:10 was treated 45 min, tensile 25.61 Mpa, which increased by 54% from without any treatment, value declined 49% 4.29 × 10?12 g·cm/cm2·s·Pa. More importantly, films’ DPPH scavenging activity maximal levels 85.45%. In short, these observations create feasible strategy preparing high-performance biodegradable active-packaging