Photodynamic antibacterial micro/nanofiber composite membrane with high efficiency and low resistance filtration performance for medical protective materials

Bacterial infection is one of the major threats to human health worldwide, posing a great challenge to the development of medical protective materials with efficient filtration and long-lasting antimicrobial properties. In this study, electrospinning technology and non-woven fabrics were combined to construct a micro/nano-structured photodynamic rechargeable and storable antibacterial filtration composite membrane. The filtration efficiency of the composite membrane is as high as 99.99% for 0.5-5 lm particles, and the resistance pressure drop is 85 Pa. In addition, the release of center dot OH and H2O2 from the composite film reached 5326.16 lg/g and 711.93 lg/g, respectively. After 7 cycles of quenching, the charging capacity retains more than 70 % of the original. It showed good antimicrobial properties even when stored under dark conditions for one month. The bactericidal efficiency of the composite membrane against E. coli and S. aureus exceeded 99% under both dark and light conditions. The development of this simple and clean micro/nanofiber membrane provides a new idea for exploring photoactive antimicrobial and filtration materials for medical protection. (c) 2023 The Korean Society of Industrial and Engineering Chemistry. Published by Elsevier B.V. All rights reserved.