Preparation of PVA/Ag antibacterial hydrophobic slow-release composite films with core-shell structure by one-step method

Based on electrostatic spinning technology, the hydrophilic material Polyvinyl alcohol (PVA) was hydrophobically modified by opposite spraying, coaxial and electrostatic spraying techniques respectively. Under the same process parameters, three methods were used to laminate PVA at 8% concentration with Polystyrene(PS), and the final composite film was prepared with a substantially higher contact angle of 33 degrees than the pure PVA film, rising to 94.5, 126.5 and 133.5 respectively, achieving hydrophobicity. The composite film prepared by the coaxial method had the best inhibitory effect on Escherichia coli and Staphylococcus aureus and the best sustained release rate.