Self‐supporting three‐dimensional electrospun nanofibrous membrane for highly efficient air filtration

Abstract

High‐performance air filtration was the key to health protection from biological and ultrafine dust pollution. A self‐supporting, three‐dimensional (3D) nanofibrous membrane with curled pattern was electrospun for the filtration, of which the micro‐fluffy structure displayed high-filtration efficiency and low‐pressure drop. The flow field in the 3D filtration membrane was simulated to optimize the process parameters to increase the filtration performance. The qualification factor increased from 0.0274 Pa−1 to 0.0309 Pa−1 by 12.77% after the optimization of the electrospinning parameters. The best filtration efficiency and pressure drop were 93.6% and 89.0 Pa, separately. This work provides a new strategy to fabricate 3D structures through the construction of fiber morphology and promotes further improvement of air filtration performance of fibrous filters.