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