Antibacterial films with enhanced physical properties based on poly (vinyl alcohol) and halogen aminated-graphene oxide

摘要

Graphene oxide (GO) nanosheets as great nanofiller have been utilized for the enhancement of a polymer matrix. In this work, polymeric N-halamine poly[5,5-dimethyl-3-(3 '-triethoxysilylpropyl)hydantoin] (PSPH) was covalently grafted onto GO, which was denoted as GO-PSPH. The chlorinated GO-PSPH (GP-Cl) was then mixed with poly (vinyl alcohol) (PVA) solution to obtain the PVA/GP-Cl hybrid films. The as-prepared hybrid films were characterized by scanning electron microscopy (SEM) and Fourier transform infrared (FT-IR) spectra. Compared with PVA film, the addition of GP-Cl into PVA matrix endowed the film with enhanced thermal and mechanical properties, and the crystallinity, tensile strength, and Young's modulus increased by 45, 21, and 246%, respectively. It can be deduced that the interfacial interaction between PVA matrix and GP-Cl nanosheets was the crucial factor for the physical enhancement. Furthermore, the synergistic effect between GO and polymeric N-halamine greatly improved the antibacterial activities of the hybrid films with 3.95 logs reduction of Staphylococcus aureus and 4.53 logs reduction of Escherichia coli O157:H7 with 30 min of contact time, respectively. (c) 2019 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2019, 136, 48176.