Nanostructure evolution in high-temperature perfluorosulfonic acid ionomer membrane by small-angle x-ray scattering

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dc.contributor.authorMistry, MKen_AU
dc.contributor.authorChoudhury, NRen_AU
dc.contributor.authorDutta, NKen_AU
dc.contributor.authorKnott, RBen_AU
dc.date.accessioned2011-01-17T23:33:08Zen_AU
dc.date.available2011-01-17T23:33:08Zen_AU
dc.date.issued2010-12-21en_AU
dc.date.statistics2010-12-21en_AU
dc.description.abstractThe high-temperature morphology of supported liquid membranes (SLMs) prepared from perfluorinated membranes such as Nafion and Hyflon and hydrophobic ionic liquid 1-butyl-3-methylimidazolium bis(trifluoromethylsulfonyl)imide (BMI-TFSI) has been investigated by small-angle X-ray scattering (SAXS). Proton conductivity results of SLMs before and after leaching show an increase in conductivity with temperature up to 160°C in an anhydrous environment. DSC results show that crystallites within perfluorinated membranes are thermally stable up to 196°C. High-temperature SAXS results have been used to correlate structure and morphology of supported liquid membranes with high-temperature conductivity data. The ionic liquid essentially acts as a proton solvent in a similar way to water in hydrated Nafion membranes and increases size of clusters, which allow percolation to be achieved more easily. The cation of the ionic liquid interacts with sulfonate groups within ionic domains through electrostatic interactions and displaces protons. Protons can associate with free anions of the ionic liquid, which are loosely associated with cations and can transport by hopping from anion sites within the membrane. The ionic liquid contributes to proton conductivity at high temperature through achievement of long-range ordering and subsequent percolation. © 2010, American Chemical Societyen_AU
dc.identifier.citationMistry, M. K., Choudhury, N. R., Dutta, N. K., & Knott, R. (2010). Nanostructure evolution in high-temperature perfluorosulfonic acid ionomer membrane by small-angle x-ray scattering. Langmuir, 26(24), 19073-19083. doi:10.1021/la1030763en_AU
dc.identifier.govdoc3129en_AU
dc.identifier.issn0743-7463en_AU
dc.identifier.issue24en_AU
dc.identifier.journaltitleLangmuiren_AU
dc.identifier.pagination19073-19083en_AU
dc.identifier.urihttp://dx.doi.org/10.1021/la1030763en_AU
dc.identifier.urihttp://apo.ansto.gov.au/dspace/handle/10238/2931en_AU
dc.identifier.volume26en_AU
dc.language.isoenen_AU
dc.publisherAmerican Chemical Societyen_AU
dc.subjectNanostructuresen_AU
dc.subjectSmall angle scatteringen_AU
dc.subjectMorphologyen_AU
dc.subjectSupported liquid membranesen_AU
dc.subjectLeachingen_AU
dc.subjectIonic conductivityen_AU
dc.titleNanostructure evolution in high-temperature perfluorosulfonic acid ionomer membrane by small-angle x-ray scatteringen_AU
dc.typeJournal Articleen_AU
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