Electrospun Polystyrene and Acid-Treated Cellulose Nanocrystals with Intense Pulsed Light Treatment for N95-Equivalent Filters

Danny Wong, Sean Hartery, Erin Keltie, Rachel Chang, Jong Sung Kim, Simon S. Park

Research output: Contribution to journalArticlepeer-review

1 Scopus citations

Abstract

The coronavirus (SARS-CoV-2) has prompted a global need and shortage of face masks and respirators. Electrospinning of polystyrene and cellulose nanocrystals (CNCs) is used to fabricate filter materials exceeding N95 standards set by the National Institute for Occupational Health and Safety. The desired filtration efficiency and pressure drop are achieved from filters with varying amounts of input material. The water contact angle, fiber morphology, and surface potential are reported to explain the enhancements in filtration performance after the addition of CNCs or application of intense pulsed light (IPL). The improved durability in the form of increased mechanical properties and lower pressure drop after testing are also examined. The samples exhibited filtration efficiencies greater than 99% and an initial pressure drop as low as 231 Pa. The combination of CNCs and IPL shows the potential to use thinner membranes with less material to achieve comparable filtration performance, which may result in lower manufacturing costs.

Original languageEnglish (US)
Pages (from-to)4949-4958
Number of pages10
JournalACS Applied Polymer Materials
Volume3
Issue number10
DOIs
StatePublished - Oct 8 2021
Externally publishedYes

Keywords

  • N95
  • electrospinning
  • filtration
  • intense pulsed light
  • surface potential
  • tensile testing

ASJC Scopus subject areas

  • Polymers and Plastics
  • Process Chemistry and Technology
  • Organic Chemistry

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