Abstract 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 m2/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.

中文翻译：

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用于高效捕集 PM2.5 的聚偏二氟乙烯复合纳米纤维过滤器

摘要 过滤材料广泛应用于细颗粒物（PM）的捕集，但仍存在过滤效率低、清洗困难、风量低等问题亟待解决。在这项工作中，通过使用旋转珠线的静电纺丝技术在过滤材料上引入超薄聚偏二氟乙烯 (PVDF) 纳米纤维层，制造了高性能 PM2.5 捕获和高生产率（1000 平方米/天）喷丝板。静电纺 PVDF 纳米纤维表现出很强的截留和吸引 PM 的能力，因此，过滤材料对 PM2.5 的过滤效率显着提高（69.958%–98.161%）。复合过滤器具有更高的气流 (278.4 mm/s) 和更低的压降 (30 Pa)。此外，长期过滤和通风率实验表明，复合过滤器具有稳定的高过滤效率（98.137%~96.36%）和通风率。静电纺PVDF纤维还具有一定的疏水性，可有效延长复合过滤器的使用寿命。这种高性能复合纳米纤维膜将成为大规模 PM2.5 捕获生产和个人健康保护的有前途的过滤器。