8:00 PM - EN16.03.05
Fabrication of Nanofiber Air Filter with Self-Cleaning through Superhydrophobic Bead Coating
Hyonguk Kim1,Seong Kyung Hong2,Chan Park1,Cheol Jeong Park1,Byeongjun Lee1,Jungmin Kim1,Yeon-Do Jeong1,Geunbae Lim2,Seong Jin Cho1
Chungnam National University1,Pohang University of Science and Technology2
Recently, in air quality management has gained great attraction as PM2.5 has been shown to have a close association to casuing health problems1,2,3. The Global Burden of Disease Study reported that exposure to outdoor PM2.5 was responsible for around 3.2 million premature deaths in 2010 worldwide4. Such outdoor air pollution can enter the indoor environment through ventilation and infiltration processes.
Various nanofiber filters have been developed for the removal of PM2.55,6,7. These filters exhibit high fine dust removal efficiency and relatively low air resistance. However, these filters have a problem in that their filtration performance degrades in long-term operation. To grant the previous fine dust filters with recyclability, self-cleaning effect via superhydrophobic surface can be considered, though few studies have been conducted on the application of superhydrophobicity to air filters.
In this study, polyacrylonitrile (PAN) nanofibrous membrane was fabricated on aluminum mesh and Polydimethylsiloxane/Polyvinylidene fluoride (PDMS/PVDF) microbeads were coated to make a superhydrophobic air filter. The filter exhibited high PM2.5 removal efficiency and superhydrophobicity. The filter was washed with water after a long-term filtering operation as the running water removed fine dust on the filter. The filter with the contaminants removed was tested and it was confirmed that PM2.5 removal performance was restored.
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