1. Composite Materials Research Center, College of Materials Science and Engineering，Shanghai University,Shanghai 200444, China
2. College of Materials Science and Engineering, Donghua University, Shanghai 201620, China
Coronavirus transmission and air pollution caused by particulate matter have become global challenges. Nanofiber membrane filters, have attracted considerable attention as they can effectively capture particulate matter in the air without causing a large level of pressure drop. This paper mainly focuses on electrospinning nanofibers and their application in air filtration. Firstly, the principle of electrospinning technology and the factors affecting the size and shape of nanofibers were introduced. Secondly, the filtration mechanism, filtration evaluation parameters and influencing factors of nanofiber membrane were systematically analyzed. A variety of strategies to improve filtration efficiency such as the use of nano-pore structure or branched fiber morphology, electret nanofiber membrane and multi-layer structure were summarized. Finally, the prospect of green and multi-functional nanofiber air filters in the future was pointed out.