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

Anna Martinelli (Institutionen för teknisk fysik, Kondenserade materiens fysik) ; Aleksandar Matic (Institutionen för teknisk fysik, Kondenserade materiens fysik) ; Per Jacobsson (Institutionen för teknisk fysik, Kondenserade materiens fysik) ; Lars Börjesson (Institutionen för teknisk fysik, Kondenserade materiens fysik) ; M.A. Navarra ; D Munaò ; S Panero ; B Scrosati
Solid State Ionics (0167-2738). Vol. 178 (2007), 7-10, p. 527-531.
[Artikel, refereegranskad vetenskaplig]

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.



Denna post skapades 2007-10-17. Senast ändrad 2017-10-17.
CPL Pubid: 54600

 

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Institutioner (Chalmers)

Institutionen för teknisk fysik, Kondenserade materiens fysik (1900-2015)

Ämnesområden

Den kondenserade materiens fysik
Teknisk fysik

Chalmers infrastruktur