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

被引：49

作者：

Wang, Chen ^{[1
]}

Krishnan, Veena ^{[2
]}

Wu, Dongsheng ^{[1
]}

Bledsoe, Rylan ^{[2
]}

Paddison, Stephen J. ^{[1
]}

Duscher, Gerd ^{[2
,3
]}

机构：

[1] Univ Tennessee, Dept Chem & Biomol Engn, Knoxville, TN USA

[2] Univ Tennessee, Dept Mat Sci & Engn, Knoxville, TN USA

[3] Oak Ridge Natl Lab, Mat Sci & Technol Div, Oak Ridge, TN USA

来源：

JOURNAL OF MATERIALS CHEMISTRY A | 2013年 / 1卷 / 03期

基金：

美国国家科学基金会;

关键词：

NAFION PERFLUORINATED MEMBRANES; DISSIPATIVE PARTICLE DYNAMICS; PROTON-EXCHANGE MEMBRANES; FUEL-CELL MEMBRANES; ANGLE X-RAY; ELECTRON-MICROSCOPY; POLYMER MEMBRANES; MORPHOLOGY; SCATTERING; TRANSPORT;

D O I：

10.1039/c2ta01034h

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

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.

引用

页码：938 / 944

页数：7

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