A study on the state of PWA in PVDF-based proton conducting membranes by Raman spectroscopy
Journal article, 2007

Polymer composite proton conducting membranes with increasing amount of tungstophosphoric acid (PWA) have been synthesized starting from poly(vinylidene) fluoride and alumina. Membranes could be prepared with an acid loading up to 16.7 wt.%. The conductivity of the membranes increases with acid loading up to 10- 3 Scm- 1 at the highest loading. The membrane matrices have a good thermal stability up to 240 °C, however a loss of water absorbed during the preparation procedure is observed at a considerably lower temperature. Raman spectroscopy showed that in the membrane the polymer adopts a conformation that could promote a separation into hydrophilic/hydrophobic sites. An interaction between alumina and PWA is also found that might limit the conductivity of the membranes.

Author

Anna Martinelli

Chalmers, Applied Physics, Condensed Matter Physics

Aleksandar Matic

Chalmers, Applied Physics, Condensed Matter Physics

Per Jacobsson

Chalmers, Applied Physics, Condensed Matter Physics

Lars Börjesson

Chalmers, Applied Physics, Condensed Matter Physics

M.A. Navarra

Sapienza University of Rome

D Munaò

Sapienza University of Rome

S Panero

Sapienza University of Rome

B Scrosati

Sapienza University of Rome

Solid State Ionics

0167-2738 (ISSN)

Vol. 178 7-10 527-531

Subject Categories

Other Engineering and Technologies

Condensed Matter Physics

DOI

10.1016/j.ssi.2006.12.002

More information

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3/5/2018 8