Fabrication and characterization of electrospun PAN-Ag nanofiber membranes for antibacterial activity and air nanofiltration

Particulate matter and airborne microorganisms are two of the most serious indoor air problems due to their significant risks to human health. Comprehensive research on air filtration with good filtration performance for fine particles and antibacterial function is essential. In this study, after trial and error and optimization of conditions, polyacrylonitrile (PAN) ۱۰% - ۱% silver nanoparticles (AgNPs) membranes with suitable morphology and uniform diameter distribution successfully designed and fabricated by an electrospinning method. These electrospun mats showed good antibacterial activity toward Staphylococcus aureus (Gram-positive bacteria) and Escherichia coli (Gram-negative bacteria). With integrated properties of small fiber diameter and robust mechanical strength of ۷.۱۴ MPa, the resultant PAN۱۰%-۱%Ag membranes exhibits high filtration efficiency of ۹۹.۲۷%, low pressure drop of ۳۳ Pa, and good quality factor. The fabrication of PAN-Ag membranes will have broad applications, including face mask, indoor air filtration and clean room.