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Polymers 2016, 8(9), 344; doi:10.3390/polym8090344

Nanoindentation Investigation of Temperature Effects on the Mechanical Properties of Nafion® 117

1
School of Power and Mechanical Engineering, Wuhan University, Wuhan 430072, China
2
Department of Engineering mechanics, School of Civil Engineering, Wuhan University, Wuhan 430072, China
*
Author to whom correspondence should be addressed.
Academic Editor: Mohamed Khayet
Received: 12 June 2016 / Revised: 25 July 2016 / Accepted: 14 September 2016 / Published: 20 September 2016
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Abstract

Operating temperature can be a limiting factor in reliable applications of Proton Exchange Membrane (PEM) fuel cells. Nanoindentation tests were performed on perfluorosulfonic acid (PFSA) membranes (Nafion® 117) in order to study the influence of the temperature condition on their mechanical properties. The hardness and reduced modulus of Nafion® 117 were measured within a certain temperature range, from 10 to 70 °C. The results indicate that both hardness and elastic modulus show non-monotonic transition with the increase of the test temperature, with reaching peak values of 0.143 and 0.833 GPa at 45 °C. It also found that the membranes have a shape memory effect and a temperature dependent shape recovery ratio. View Full-Text
Keywords: perfluorosulfonic acid (PFSA) membranes; Nafion® 117; temperature effects; mechanical properties; nanoindentation perfluorosulfonic acid (PFSA) membranes; Nafion® 117; temperature effects; mechanical properties; nanoindentation
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Xia, R.; Zhou, H.; Wu, R.; Wu, W.-P. Nanoindentation Investigation of Temperature Effects on the Mechanical Properties of Nafion® 117. Polymers 2016, 8, 344.

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