Nanofiber extraction using the electrospinning method has gained attention as a route to obtain nanofiber textiles and membranes using synthetic and natural polymers. There exist numerous potential applications such as smart textiles, sensors, battery separators, and filters by adopting the electrospinned nanofibers. Recently, electrospun nanofiber have also gained interest as air filter materials. Due to its exceptional dust trapping capability, it can be used to produce compact and high efficient air filter media. In particular, particulate matter (PM) below 2.5 is especially difficult to trap with typically filter media.
In this work, we report the light transmittable air filter formation by using the electrospinning method. We employed different polymers such as polyarylonitrile (PAN), polyimide (PI) resin, and Nylon-6 to determine optimal nanofiber formation condition to btain nanofiber uniform films on different mesh substrates. Using differently electrospinned nanofiber mats, the visibility, uniformity, and individual fiber thickness of the prepared films were examined and determined optimal conditions. Using these filters, we also performed PM trapping test and compared the trapping efficiency between the filters prepared by electrospinning method. Specifically, we also tested the filtering efficiency by varying light transmission level. The results indicate close relationship between the electric dipole moment of the polymer source and PM trapping efficiency.
Acknowledgement: “This subject is supported by Korea Ministry of Environment(MOE) as "Advanced Technology Program for Environmental Industry Program".