Electrostatic Transparent Air Filter Membranes Composed of Metallized Microfibers for Particulate Removal

Min Woo Kim, Seongpil An, Hyunjun Seok, Sam S. Yoon, Alexander L. Yarin

Research output: Contribution to journalArticlepeer-review

36 Citations (Scopus)


Particulate matter (PM) from ever-increasing industrialization poses a great public health risk. Although fiber-based filters are used effectively to block PM, filters with high packing densities suffer from excessive pressure drops. Electret filters bypass intermediate- or large-sized particles and thus capture only small particles, the motion of which can be influenced by weak electrostatic fields. In this study, we demonstrate the fabrication of metallized fibers that produce intense electric fields, thereby enabling capture of PMs of a variety of sizes produced by burning incense. The filter consisting of these metallized fibers effectively removes moving particles from air. An electricity-driven filter is relatively thin and has a low packing density, making it light, portable, transparent, and inexpensive. The sizes of the pores between the metallized fibers are readily controlled by manipulating the electrospinning and electroplating times. Sufficiently large pores permit efficient airflow and thus increase permeability without risking an excessive pressure drop. The metallized fiber filter is washable and thus reusable. In this study, a PM removal rate of >97% was recorded using a filter designed under optimal conditions.

Original languageEnglish
Pages (from-to)26323-26332
Number of pages10
JournalACS Applied Materials and Interfaces
Issue number29
Publication statusPublished - 2019 Jul 24

Bibliographical note

Funding Information:
This research was supported by the Technology Development Program to Solve Climate Changes of the National Research Foundation (NRF) funded by the Ministry of Science, ICT & Future Planning (NRF-2016M1A2A2936760), NRF-2013R1A5A1073861, no. CRC-16-02-KICT, and NRF-2017R1A2B4005639.


  • air filtration
  • electrostatic attraction
  • metallized microfibers
  • particulate matter
  • reusable filter

ASJC Scopus subject areas

  • General Materials Science


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