Experimental Study on Charge Decay of Electret Filter Due to Organic Solvent Exposure

Hyun Jin Choi, Eun Seon Park, Jeong Uk Kim, Sung Hyun Kim, Myong Hwa Lee

Research output: Contribution to journalArticlepeer-review

34 Citations (Scopus)


The electret filter is a potential component to remove airborne particles due to its high collection efficiency and low pressure drop. However, its filtration performance is gradually decreased by exposure to organic solvents, which limits the application of electret filters. The effect of ethanol exposure on the filtration performance of polypropylene electret filters was investigated experimentally to clarify the charge decay phenomenon in this study. Experimental results revealed that filter performance is strongly dependent upon the challenged mass and existing state of an ethanol solvent. The filter performance was drastically degraded by exposure to ethanol droplets generated from a solution with ethanol concentrations above 30%; however, it was maintained during exposure to ethanol vapors. This tendency was also seen in the surface potentials of the exposed filter media. In addition, we found that the critical challenging amount of ethanol droplets was in the vicinity of 0.045 g/cm2 to neutralize a tested electret filter in this study.Copyright 2015 American Association for Aerosol Research

Original languageEnglish
Pages (from-to)977-983
Number of pages7
JournalAerosol Science and Technology
Issue number10
Publication statusPublished - 2015 Oct 3

Bibliographical note

Publisher Copyright:
Copyright © American Association for Aerosol Research.

ASJC Scopus subject areas

  • Environmental Chemistry
  • General Materials Science
  • Pollution


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