Preparation and Properties of PVDF/Fe<sub>3</sub>O<sub>4</sub> Nanofibers with Magnetic and Electret Effects and their Application in Air Filtration
Fan Liu, Mengying Li, Fang Li, Kai Weng, Kun Qi, Chunhui Liu, Qing-Qing Ni, Xuejiao Tao, Jing Zhang, Weili Shao, Jianxin He
Abstract
Abstract Electrospun electret filter material is widely studied because of its excellent removal effect on particulate matter from air streams. Here, a kind of high efficiency and low pressure drop nanofiber (NF) membrane with both electret effect and magnetic effect is developed, and compounded it with glass fiber mesh and polyester (polyethylene terephthalate) mesh to prepare a sandwich structure of NF anti‐haze window screen. Under the synergistic effect of magnetic particles, when the density is 2.06 g m −2 , the filtration efficiency of NF anti‐haze window screen can reach 99.95% for the fine particles below 0.3 µm, while the filtration pressure drop is only 58.5 Pa, with good light transmittance and excellent breaking strength (6.32 MPa). Therefore, polyvinylidene fluoride/Fe 3 O 4 composite NF membrane has a potential application prospect in the field of air filtration.