Issue 3, 2013
From the journal:

Journal of Materials Chemistry A

Evaluation of the microstructure of dry and hydrated perfluorosulfonic acid ionomers: microscopy and simulations†

Chen Wang,a   Veena Krishnan,b   Dongsheng Wu,a   Rylan Bledsoe,b   Stephen J. Paddison*a  and  Gerd Duscherbc  

* Corresponding authors

a Department of Chemical and Biomolecular Engineering, University of Tennessee, Knoxville, TN, USA
E-mail: spaddison@utk.edu

b Department of Materials Science and Engineering, University of Tennessee, Knoxville, TN, USA

c Oak Ridge National Laboratory, Material Science & Technology Division, Oak Ridge, TN, USA

Abstract

The morphology of dry and hydrated perfluorosulfonic acid (PFSA) ionomers at cryo and room temperature is examined using TEM/STEM with EELS capability. Z-contrast imaging was utilized to identify the micro-phase separation of the hydrophilic side chains containing water and the hydrophobic polytetrafluoroethylene (PTFE) backbones. The results compare very favourably with hydrated morphologies obtained through mesoscale dissipative particle dynamics (DPD) simulations. The cryo-STEM images of plunge-frozen samples was also found to agree with morphologies based on SAXS experiments.

Graphical abstract: Evaluation of the microstructure of dry and hydrated perfluorosulfonic acid ionomers: microscopy and simulations

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Article information

DOI
https://doi.org/10.1039/C2TA01034H
Article type
Paper
Submitted
08 Nov 2012
Accepted
08 Nov 2012
First published
15 Nov 2012

J. Mater. Chem. A, 2013,1, 938-944

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Evaluation of the microstructure of dry and hydrated perfluorosulfonic acid ionomers: microscopy and simulations

C. Wang, V. Krishnan, D. Wu, R. Bledsoe, S. J. Paddison and G. Duscher, J. Mater. Chem. A, 2013, 1, 938 DOI: 10.1039/C2TA01034H

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