Pore Size Distribution and Water Uptake in Hydrocarbon and Perfluorinated Proton-Exchange Membranes as Studied by NMR Cryoporometry
2008 (English)In: Fuel Cells, ISSN 1615-6846, E-ISSN 1615-6854, Vol. 8, no 3-4, 262-269 p.Article in journal (Refereed) Published
Sulfonated polysulfone (sPSU) membranes were analysed by nuclear magnetic resonance (NMR) cryoporometry, conventional gravimetric water uptake measurements as well as by differential scanning calorimetry (DSC). NMR cryoporometry is based on the relation between the pore size and the melting point depression of the pore-filling liquid, i.e. water in fuel cell membranes; thus providing a relation between the amount of molten water and the temperature shift, i.e. the pore size, in hydrated membranes. An sPSU membrane with high ion-exchange capacity (IEC 1.45 mequiv. g –1) possessed a significant amount of large pores after hydrothermal pretreatment at 80
Place, publisher, year, edition, pages
2008. Vol. 8, no 3-4, 262-269 p.
Differential Scanning Calorimetry, Nafion, Nuclear Magnetic Resonance Cryoporometry, ProtonExchange Membrane Fuel Cell, PEMFC, Sulfonated Polysulfone, Water Domain Size, Water Uptake
IdentifiersURN: urn:nbn:se:kth:diva-9165DOI: 10.1002/fuce.200800010ISI: 000258086400013ScopusID: 2-s2.0-55349126100OAI: oai:DiVA.org:kth-9165DiVA: diva2:25472
QC 201009212008-10-132008-09-292012-03-21Bibliographically approved