Measurement of water vapor diffusion in nanoscale polymer films by frequency-domain probe beam deflection

Xu Xie, Jordan M. Dennison, Jungwoo Shin, Zhu Diao, David G Cahill

Research output: Contribution to journalArticle

Abstract

We developed an optical pump-probe technique, frequency-domain probe beam deflection (FD-PBD) to measure the diffusion of water vapor in nanoscale polymer films with microsecond temporal resolution and micrometer spatial resolution. We describe the quantitative model of beam deflection for multilayer structures, the experimental approach, and the application of FD-PBD to measure the diffusivity (D m ) of saturated water vapor in various glassy polymer films including polyimide (PI, D m = 7.0 × 10 -13 m 2 s -1 ), poly(methyl methacrylate) (PMMA, D m = 1.2 × 10 -12 m 2 s -1 ), poly-(vinylpyrrolidone) (PVP, D m = 1.7 × 10 -12 m 2 s -1 ), and cellulose acetate (CA, D m = 2.6 × 10 -11 m 2 s -1 ), and the piperazine/trimesoyl chloride (PIP/TMC, D m = 9 × 10 -11 m 2 s -1 ) nanofiltration membrane synthesized by interfacial polymerization. The uncertainty of the measurements is typically ≈8%.

Original languageEnglish (US)
Article number104904
JournalReview of Scientific Instruments
Volume89
Issue number10
DOIs
StatePublished - Oct 1 2018

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Polymer films
Water vapor
water vapor
deflection
probes
polymers
Nanofiltration membranes
temporal resolution
Polymethyl methacrylates
cellulose
polyimides
polymethyl methacrylate
Polyimides
laminates
diffusivity
micrometers
acetates
Cellulose
Multilayers
polymerization

ASJC Scopus subject areas

  • Instrumentation

Cite this

Measurement of water vapor diffusion in nanoscale polymer films by frequency-domain probe beam deflection. / Xie, Xu; Dennison, Jordan M.; Shin, Jungwoo; Diao, Zhu; Cahill, David G.

In: Review of Scientific Instruments, Vol. 89, No. 10, 104904, 01.10.2018.

Research output: Contribution to journalArticle

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