Transparent Metallized Microfibers as Recyclable Electrostatic Air Filters with Ionization

Air-quality control remains a major environmental concern as polluted air is a threat to public safety and health in major industrialized cities. To filter pollutants, fibrous filters employing electrostatic attraction have been widely used. However, such air filters suffer from some major disadvantages, including low recyclability and a significant pressure drop owing to clogging and a high packing density. Herein, we developed ionization-assisted electrostatic air filters consisting of nonwoven nanofibers. Ionization of particulate matter (PM) using air ionization enhanced the electrostatic attraction, thereby promoting efficient filtration. Metallization of the fibers facilitated strong electrical attraction and the consequent capture of PM of various sizes. The low packing density of the metallized fibers also facilitated efficient filtration of the PM, even at low driving pressures, which in turn reduced the energy consumption of the air-filtration device.

空气质量控制仍然是主要的环境问题，因为在主要的工业城市中，污染的空气对公共安全和健康构成威胁。 为了过滤污染物，已经广泛使用了利用静电吸引的纤维过滤器。 但是，这样的空气过滤器具有一些主要的缺点，包括低的可回收性和由于堵塞和高的堆积密度导致的显着的压降。 在这里，我们开发了由非织造纳米纤维组成的电离辅助静电空气过滤器。 使用空气电离对颗粒物（PM）进行电离可增强静电吸引力，从而促进有效过滤。 纤维的金属化促进了强大的电吸引，并因此捕获了各种尺寸的PM。 即使在低驱动压力下，金属化纤维的低堆积密度也促进了PM的有效过滤，从而降低了空气过滤装置的能耗。

Published: 2020

Journal ：ACS APPL MATER INTER

Impact Factor：9.002

Paper link: https://pubs.acs.org/doi/abs/10.1021/acsami.0c01697