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Liquid-Induced Discharge of Polypropylene Microfiber Electret Filters


Nazeeri, Albert Isaac (2021) Liquid-Induced Discharge of Polypropylene Microfiber Electret Filters. Senior thesis (Major), California Institute of Technology. doi:10.7907/f88b-x760.


Polymer microfiber electret filters are the technology behind N95 and equivalent type respirators. Understanding how liquids interact with and discharge these filters would allow for the development of non-damaging liquid decontamination protocols. Previous work on liquid/filter interactions has been largely empirical with articles reporting the effect a specific liquid has on the filtration efficiency of a particular filter. This thesis proposes a theoretical model of liquid induced discharge of polymer microfiber electret filters via the ideas of surface wetting and electrical conductivity. This model was tested, and validated, on commercially available polypropylene microfiber electret filters through wetting, thermally stimulated discharge (TSD), and filtration experiments.

Item Type:Thesis (Senior thesis (Major))
Subject Keywords:Electret filter, wetting, thermally stimulated discharge, surface tension
Degree Grantor:California Institute of Technology
Division:Physics, Mathematics and Astronomy
Major Option:Physics
Thesis Availability:Public (worldwide access)
Research Advisor(s):
  • Kirschvink, Joseph L.
Thesis Committee:
  • Libbrecht, Kenneth George (chair)
  • Alicea, Jason F.
  • Politzer, Hugh David
  • Frautschi, Steven C.
  • Kimble, H. Jeff
  • Kapustin, Anton N.
  • Kirschvink, Joseph L.
Defense Date:2 June 2021
Non-Caltech Author Email:albertnazeeri (AT)
Record Number:CaltechTHESIS:06162021-230506010
Persistent URL:
Nazeeri, Albert Isaac0000-0003-0000-9841
Default Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:14279
Deposited By: Albert Nazeeri
Deposited On:06 Jul 2021 21:01
Last Modified:13 Jul 2021 23:41

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