Using the electret filter to remove the submicron aerosols

The fibers in the electret filter are permanently charged, so electrostatic forces act between the charged fibers and the aerosol. The aerosol capture mechanisms of these filters depend on a combination of the electrostatic mechanisms (dielectrophoretic and Coulombic) as well as the conventional mechanisms, including impaction, interception, diffusion and gravitationally settling.
Though many researches have investigated the filtration characteristics of the electret filters, few studies have demonstrated the comparison of influences of different parameters on the aerosol
penetration of the electret. Therefore, this work aims to compare the effects of the experimental parameters on aerosol penetration.