Preparation of electrospun polyurethane filter media and their collection mechanisms for ultrafine particles

Hyun Jin Choi, Sang Bum Kim, Sung Hyun Kim, Myong Hwa Lee

Research output: Contribution to journalArticle

27 Citations (Scopus)

Abstract

Electrospinning is a simple and versatile process to produce polymer nanofibers, which are useful for ultrafine particle filtration. In this study, a polyurethane filter with an average fiber diameter of 150-250 nm was prepared through the electrospinning process and its filtration characteristics were investigated. We found that the electrospun fiber diameter was highly dependent on the polyurethane concentration, electric field, and tip-to-collector distance. As the polyurethane concentration, electric field, and tip-to-collector distance under the same electric field increased, the fiber diameter increased. We also found that the produced filter media had a minimum collection efficiency at particles sizes from 80 to 100 nm, which implies an electrostatic attraction between the filter and the test particles. Furthermore, we observed that interception was a predominant collection mechanism at Peclet numbers higher than 10 in nanofiber filtration for ultrafine particles. A polyurethane nanofiber filter with excellent mechanical properties was prepared, and the effect of operating conditions on fiber morphology was examined. The filter fabricated by an electrospinning process is charged and has high filtration efficiency due to electrostatic force. Therefore, it can be a good alternative to control hazardous ultrafine particles.

Original languageEnglish
Pages (from-to)322-329
Number of pages8
JournalJournal of the Air and Waste Management Association
Volume64
Issue number3
DOIs
Publication statusPublished - 2014 Feb 25

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ASJC Scopus subject areas

  • Management, Monitoring, Policy and Law
  • Waste Management and Disposal

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