Preparation and good antibacterial properties of self-assembled P(AA-AM)/CA/GA fiber membrane by electrospinning

Abstract

To reduce mortality rate caused by life-threatening bacterial infections, advanced antibacterial materials have attracted widespread attention from researchers worldwide. In this study, the antibacterial P(AA-AM)/CA/GA nanofiber membranes with pH-responsive properties were successfully prepared by facile electrospinning technology. A series of characterizations of the obtained nanofiber membranes showed the addition of P(AA-AM) improves the surface wettability of the as-spun fibers in comparison to those of CA and CA/GA nanofiber membranes. High-temperature treatment was found to enhance the mechanical properties of the P(AA-AM)/CA/GA membranes due to the crosslinking reactions. The prepared P(AA-AM)/CA/GA nanofiber membrane exhibits a pH-responsive effect which is evident by the change in GA’s release rate in solutions with different pH values. The cellulose acetate (CA) spinning nanofiber structure formed by P(AA-AM) coated GA also extended the release process of GA and improved the antibacterial timeliness of nanofiber membranes. The antibacterial experiments on E. coli and S. aureus showed that the electrospun nanofiber membranes containing GA had potent antibacterial properties, which were further enhanced by increasing the GA content in the P(AA-AM)/CA/GA blends. This study provides an insight into the design and preparation of pH-sensitive antibacterial materials using facile electrospinning technology.