Real-time measurement of dimensional swelling in proton-conductive membranes for fuel cells

Kyle C. Bryson, Tomonori Saito, Michael Anthony Hickner

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

Real-time dimensional swelling measurements of proton-conductive membranes are reported. Nafion® (IEC = 0.91 meq g-1), a rubbery polymer, and sulfonated Radel® (IEC = 1.95 meq g-1), a stiffer polymer, were swelled by controlled transitions in relative humidity. The membranes' dynamic swelling behaviors were analyzed using two techniques. First, membranes were made optically reflective, and the macroscopic dimensional change was analyzed directly through time-resolved image analysis. Second, the volumetric swelling of membranes containing microspheres were cast and interrogated using Static Light Scattering (SLS), wherein changes in scattered light intensity correlated with the expected volumetric change during relative humidity steps. In macroscopic visualization, both maximum swelling and rate of swelling were found to be lower in sulfonated Radel, which may be attributed to this polymer's stiffer chain structure compared to Nafion®. In SLS, averaged scattered intensity curves for Nafion® showed similar shapes to those from the macroscopic visualization.

Original languageEnglish (US)
Title of host publicationAmerican Chemical Society - 238th National Meeting and Exposition, ACS 2009, Abstracts of Scientific Papers
StatePublished - 2009
Event238th National Meeting and Exposition of the American Chemical Society, ACS 2009 - Washington, DC, United States
Duration: Aug 16 2009Aug 20 2009

Other

Other238th National Meeting and Exposition of the American Chemical Society, ACS 2009
CountryUnited States
CityWashington, DC
Period8/16/098/20/09

Fingerprint

Time measurement
Swelling
Protons
Fuel cells
Membranes
Polymers
Light scattering
Atmospheric humidity
Visualization
Microspheres
Image analysis
perfluorosulfonic acid

All Science Journal Classification (ASJC) codes

  • Chemistry(all)
  • Chemical Engineering(all)

Cite this

Bryson, K. C., Saito, T., & Hickner, M. A. (2009). Real-time measurement of dimensional swelling in proton-conductive membranes for fuel cells. In American Chemical Society - 238th National Meeting and Exposition, ACS 2009, Abstracts of Scientific Papers
Bryson, Kyle C. ; Saito, Tomonori ; Hickner, Michael Anthony. / Real-time measurement of dimensional swelling in proton-conductive membranes for fuel cells. American Chemical Society - 238th National Meeting and Exposition, ACS 2009, Abstracts of Scientific Papers. 2009.
@inproceedings{ea61a0e5c9584473972a137f13d88361,
title = "Real-time measurement of dimensional swelling in proton-conductive membranes for fuel cells",
abstract = "Real-time dimensional swelling measurements of proton-conductive membranes are reported. Nafion{\circledR} (IEC = 0.91 meq g-1), a rubbery polymer, and sulfonated Radel{\circledR} (IEC = 1.95 meq g-1), a stiffer polymer, were swelled by controlled transitions in relative humidity. The membranes' dynamic swelling behaviors were analyzed using two techniques. First, membranes were made optically reflective, and the macroscopic dimensional change was analyzed directly through time-resolved image analysis. Second, the volumetric swelling of membranes containing microspheres were cast and interrogated using Static Light Scattering (SLS), wherein changes in scattered light intensity correlated with the expected volumetric change during relative humidity steps. In macroscopic visualization, both maximum swelling and rate of swelling were found to be lower in sulfonated Radel, which may be attributed to this polymer's stiffer chain structure compared to Nafion{\circledR}. In SLS, averaged scattered intensity curves for Nafion{\circledR} showed similar shapes to those from the macroscopic visualization.",
author = "Bryson, {Kyle C.} and Tomonori Saito and Hickner, {Michael Anthony}",
year = "2009",
language = "English (US)",
isbn = "9780841200050",
booktitle = "American Chemical Society - 238th National Meeting and Exposition, ACS 2009, Abstracts of Scientific Papers",

}

Bryson, KC, Saito, T & Hickner, MA 2009, Real-time measurement of dimensional swelling in proton-conductive membranes for fuel cells. in American Chemical Society - 238th National Meeting and Exposition, ACS 2009, Abstracts of Scientific Papers. 238th National Meeting and Exposition of the American Chemical Society, ACS 2009, Washington, DC, United States, 8/16/09.

Real-time measurement of dimensional swelling in proton-conductive membranes for fuel cells. / Bryson, Kyle C.; Saito, Tomonori; Hickner, Michael Anthony.

American Chemical Society - 238th National Meeting and Exposition, ACS 2009, Abstracts of Scientific Papers. 2009.

Research output: Chapter in Book/Report/Conference proceedingConference contribution

TY - GEN

T1 - Real-time measurement of dimensional swelling in proton-conductive membranes for fuel cells

AU - Bryson, Kyle C.

AU - Saito, Tomonori

AU - Hickner, Michael Anthony

PY - 2009

Y1 - 2009

N2 - Real-time dimensional swelling measurements of proton-conductive membranes are reported. Nafion® (IEC = 0.91 meq g-1), a rubbery polymer, and sulfonated Radel® (IEC = 1.95 meq g-1), a stiffer polymer, were swelled by controlled transitions in relative humidity. The membranes' dynamic swelling behaviors were analyzed using two techniques. First, membranes were made optically reflective, and the macroscopic dimensional change was analyzed directly through time-resolved image analysis. Second, the volumetric swelling of membranes containing microspheres were cast and interrogated using Static Light Scattering (SLS), wherein changes in scattered light intensity correlated with the expected volumetric change during relative humidity steps. In macroscopic visualization, both maximum swelling and rate of swelling were found to be lower in sulfonated Radel, which may be attributed to this polymer's stiffer chain structure compared to Nafion®. In SLS, averaged scattered intensity curves for Nafion® showed similar shapes to those from the macroscopic visualization.

AB - Real-time dimensional swelling measurements of proton-conductive membranes are reported. Nafion® (IEC = 0.91 meq g-1), a rubbery polymer, and sulfonated Radel® (IEC = 1.95 meq g-1), a stiffer polymer, were swelled by controlled transitions in relative humidity. The membranes' dynamic swelling behaviors were analyzed using two techniques. First, membranes were made optically reflective, and the macroscopic dimensional change was analyzed directly through time-resolved image analysis. Second, the volumetric swelling of membranes containing microspheres were cast and interrogated using Static Light Scattering (SLS), wherein changes in scattered light intensity correlated with the expected volumetric change during relative humidity steps. In macroscopic visualization, both maximum swelling and rate of swelling were found to be lower in sulfonated Radel, which may be attributed to this polymer's stiffer chain structure compared to Nafion®. In SLS, averaged scattered intensity curves for Nafion® showed similar shapes to those from the macroscopic visualization.

UR - http://www.scopus.com/inward/record.url?scp=78649796141&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=78649796141&partnerID=8YFLogxK

M3 - Conference contribution

AN - SCOPUS:78649796141

SN - 9780841200050

BT - American Chemical Society - 238th National Meeting and Exposition, ACS 2009, Abstracts of Scientific Papers

ER -

Bryson KC, Saito T, Hickner MA. Real-time measurement of dimensional swelling in proton-conductive membranes for fuel cells. In American Chemical Society - 238th National Meeting and Exposition, ACS 2009, Abstracts of Scientific Papers. 2009