A NMR AND SAXS INVESTIGATIONS OF DMFC COMPOSITES RECAST NAFION MEMBRANES CONTAINING CERAMIC FILLERS
Academic Article
Publication Date:
2006
Short description:
A NMR AND SAXS INVESTIGATIONS OF DMFC COMPOSITES RECAST NAFION MEMBRANES CONTAINING CERAMIC FILLERS / Arico', A.S., Baglio, V., Antonucci, V., Nicotera, I., Oliviero, C., Coppola, L., Antonucci, P.. - In: JOURNAL OF MEMBRANE SCIENCE. - ISSN 0376-7388. - 270:(2006), pp. 221-227.
abstract:
Small angle X-ray scattering (SAXS) and nuclear magnetic resonance (NMR) investigations of recast composite and bare Nafion membranes
have been carried out. The self-diffusion coefficients of water and methanol have been determined over a wide temperature range by PFGSE
1H NMR method. The transport mechanism appears to be influenced by surface properties of inorganic fillers. Acidic silica filler appears
to promote proton transport in the membrane with respect to basic alumina. An interaction of the silica surface with methanol molecules is
also envisaged from the analysis of proton self diffusion coefficients of methanol. The SAXS analysis revealed a modification of the polymer
structure immersed in pure methanol or methanol solution with respect to water. A significant increase of the average ion clusters dimension
is observed for the composite SiO2 membrane.
have been carried out. The self-diffusion coefficients of water and methanol have been determined over a wide temperature range by PFGSE
1H NMR method. The transport mechanism appears to be influenced by surface properties of inorganic fillers. Acidic silica filler appears
to promote proton transport in the membrane with respect to basic alumina. An interaction of the silica surface with methanol molecules is
also envisaged from the analysis of proton self diffusion coefficients of methanol. The SAXS analysis revealed a modification of the polymer
structure immersed in pure methanol or methanol solution with respect to water. A significant increase of the average ion clusters dimension
is observed for the composite SiO2 membrane.
Iris type:
1.1 Articolo in rivista
List of contributors:
Arico', A. S.; Baglio, V.; Antonucci, V.; Nicotera, I.; Oliviero, C.; Coppola, L.; Antonucci, Pierluigi
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