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Reports from CEA Saclay Advance Knowledge in Clinical Trials and Studies (Comparative Study of Proton Conducting Ionic Liquid Doped Nafion Membranes...

August 18, 2014



Reports from CEA Saclay Advance Knowledge in Clinical Trials and Studies (Comparative Study of Proton Conducting Ionic Liquid Doped Nafion Membranes Elaborated by Swelling and Casting Methods: Processing Conditions, Morphology, and Functional ...)

By a News Reporter-Staff News Editor at Clinical Trials Week -- Current study results on Clinical Research have been published. According to news reporting originating from Gif sur Yvette, France, by NewsRx correspondents, research stated, "Trifluoromethanesulfonate of triethylammmonium (TFTEA) doped Nation-TEA membranes have been evaluated to understand the impact of different elaboration methods, i.e., swelling and casting, on their nanoscale morphology using SANS and resulting functional properties such as electrochemical, thermomechanical, and transport properties. The effect of transformation of acidic side chains of Nafion into ammonium side chains (Nation-TEA) was first compared for the Nafion-TEA membrane elaborated by casting with the one elaborated by modification of extruded commercial Nafion117 membrane."

Our news editors obtained a quote from the research from CEA Saclay, "Concerning TFTEA doped membranes, their nanostructuration is very similar whatever the processing mode despite some key differences. The casting based membranes exhibit higher and/or more heterogeneous swelling of ionic domains of Nation-TEA by TFTEA and lower impact of TFTEA on the long-range crystalline order in Nation-TEA. Casting based membranes present better thermomechanical properties compared to swelling based membranes above 150 C and sustain a storage modulus of 1 MPa in the temperature range of 150-180 degrees C. With increasing TFTEA content as well as temperature, both types of membranes show an increase in the ionic conductivity of a similar order but no significant changes in hydrogen and oxygen-permeability coefficients. Both kinds of doped membranes exhibit similar sorption behavior (e.g., an increase in water uptake with increasing TFTEA content), though the results from GAB modeling suggest that morphology developed by casting is more favorable for the sorption of water molecules in middle range activity."

According to the news editors, the research concluded: "Current density of 0.85 A/cm(2) at 0.6 V was obtained with a membrane containing 20% TFTEA."

For more information on this research see: Comparative Study of Proton Conducting Ionic Liquid Doped Nafion Membranes Elaborated by Swelling and Casting Methods: Processing Conditions, Morphology, and Functional Properties. Journal of Physical Chemistry C, 2014;118(26):14157-14168. Journal of Physical Chemistry C can be contacted at: Amer Chemical Soc, 1155 16TH St, NW, Washington, DC 20036, USA. (American Chemical Society - www.acs.org; Journal of Physical Chemistry C - www.pubs.acs.org/journal/jpccck)

The news editors report that additional information may be obtained by contacting R. Sood, CEA Saclay, Lab Leon Brillouin, F-91191 Gif Sur Yvette, France. Additional authors for this research include C. Iojoiu, E. Espuche, F. Gouanve, G. Gebel, H. Mendil-Jakani, S. Lyonnard and J. Jestin (see also Clinical Research).

Keywords for this news article include: France, Europe, Gif sur Yvette, Clinical Research, Clinical Trials and Studies

Our reports deliver fact-based news of research and discoveries from around the world. Copyright 2014, NewsRx LLC


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Source: Clinical Trials Week


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