Design and development of a passive bioaerosol sampler using polarized ferroelectric polymer film

Jennifer Therkorn, Nirmala Thomas, Leonardo Calderón, Jerry Scheinbeim, Gediminas Mainelis

Research output: Contribution to journalArticle

4 Citations (Scopus)

Abstract

Passive samplers are needed to collect bioaerosols over broad spatiotemporal scales. Here, we present the design and development process of a novel, passive bioaerosol sampler using polarized, ferroelectric polymer film (poly(vinylidene fluoride), PVDF). First, the elution efficiencies of spiked bacteria and fungal spores from PVDF, prototype film holder materials (3D-printed plastics), and controls (PTFE filters and electrostatic dust cloths) were investigated. Second, a wind tunnel was used to determine optimal air channel widths between parallel sheets of PVDF for efficient collection of charge neutralized and non-charge neutralized test particles in viral, bacterial and fungal size ranges flowing with typical indoor air velocities. Particle collection efficiencies were then compared for PVDF, a PVDF copolymer (77% PVDF, 23% TrFE) and control materials (polyvinylchloride and polyfluoroalkoxy alkane). Third, a calm air settling chamber was used for proof of concept tests. Spiked microorganisms were removed with 100% elution efficiency from the PVDF and 3D-print materials. PVDF gave significantly greater collection efficiency (~30%) when using air channel widths of 2.25 mm compared to other tested widths (p<0.001). Compared to control materials, PVDF gave 13% to 30% greater collection efficiencies across all tested particle size ranges for charge neutralized and non-charge neutralized particles (p<0.001). In the calm air chamber, a spiral film prototype sampler with poled PVDF provided a greater than six-fold increase in captured bacterial quantity compared to gravimetric settling onto a 25 mm reference filter (p<0.05). This passive sampler concept offers many benefits compared to other active and passive bioaerosol samplers: small size and portability, increased bioaerosol collection compared to controls, capture of all bioaerosol particle sizes including nano-sized particles, expedited particle elution, and easy sampler production by 3D-printing. The next stage of research will be outdoor field testing to determine the collection efficiency for culturable and non-culturable samples.

Original languageEnglish (US)
Pages (from-to)128-144
Number of pages17
JournalJournal of Aerosol Science
Volume105
DOIs
StatePublished - Mar 1 2017

Fingerprint

Ferroelectric films
Polymer films
sampler
polymer
Air
air
Particle size
particle size
filter
indoor air
wind tunnel
Polytetrafluoroethylenes
fluoride
alkane
Microorganisms
Paraffins
range size
Wind tunnels
Dust
polyvinylidene fluoride

All Science Journal Classification (ASJC) codes

  • Mechanical Engineering
  • Pollution
  • Fluid Flow and Transfer Processes
  • Environmental Engineering
  • Atmospheric Science

Keywords

  • Electrostatic particle collection
  • Passive bioaerosol sampler
  • Passive sampler design and development
  • Polarized ferroelectric polymer film

Cite this

Therkorn, Jennifer ; Thomas, Nirmala ; Calderón, Leonardo ; Scheinbeim, Jerry ; Mainelis, Gediminas. / Design and development of a passive bioaerosol sampler using polarized ferroelectric polymer film. In: Journal of Aerosol Science. 2017 ; Vol. 105. pp. 128-144.
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Design and development of a passive bioaerosol sampler using polarized ferroelectric polymer film. / Therkorn, Jennifer; Thomas, Nirmala; Calderón, Leonardo; Scheinbeim, Jerry; Mainelis, Gediminas.

In: Journal of Aerosol Science, Vol. 105, 01.03.2017, p. 128-144.

Research output: Contribution to journalArticle

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T1 - Design and development of a passive bioaerosol sampler using polarized ferroelectric polymer film

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