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    Polyvinylidene fluoride composite nanofibrous filter for high-efficiency PM2.5 capture

    Year: 2020

    Journal: Compos. Commun., Volume 22, DEC

    Authors: Fan, Qian; Liang, Wen; Fan, Ting-Ting; Li, Xiao; Yan, Shi-Ying; Yu, Miao; Ning, Xin; Long, Yun-Ze

    Organizations: National Natural Science Foundation of ChinaNational Natural Science Foundation of China (NSFC) [51973100, 51673103]; State Key Laboratory of Bio-Fibers and Eco-Textiles, Qingdao University; National Key Research Development Project [2019YFC0121402]

    Keywords: Electrospun; PVDF; Nanofibrous membrane; PM2.5 capture; High productivity

    Filter materials are widely used in the capture of fine particulate matter (PM), however, there are some problems such as low filtration efficiency, difficult cleaning and low air flow still need to be solved eagerly. In this work, a high-performance PM2.5 capture as well as high productivity (1000 m(2)/day) was fabricated by introducing an ultra-thin polyvinylidene fluoride (PVDF) nanofibrous layer on the filter materials via electrospinning technology with rotary bead-wire spinnerets. The electrospun PVDF nanofibers exhibit a strong ability to intercept and attract PM, thus, the filtering efficiency of the filter material for PM2.5 improved significantly (69.958%-98.161%). The composite filter has a higher air flow (278.4 mm/s) and lower pressure drop (30 Pa). Furthermore, long-term filtration and ventilation rate experiments show that the composite filter has stable high filtration efficiency (98.137%-96.36%) and ventilation rate. Electrospun PVDF fibers also have a certain degree of hydrophobicity, which could increase the long lifetime of composite filter effectively. This high-performance composite nanofibrous membrane would be a promising filter for large-scale PM2.5 capture production and personal health protection.
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