2005
DOI: 10.1016/j.memsci.2004.10.013
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Self-diffusion coefficient of water in Nafion-117 membrane with different monovalent counterions: a radiotracer study

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Cited by 57 publications
(48 citation statements)
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“…The porosity values of the methanol and 2-propanol-swollen membranes are nearly the same, whereas the wet porosity in water is much smaller than in alcohols. The behavior observed for the NF117 membrane is in agreement with that reported by others, 21,27,28 which found that the dimensions of channels connecting the swollen clusters and the size of the clusters were larger for an alcohol-swollen membrane than that for a water-swollen membrane. Moreover, the NF117 membrane porosity values obtained in this study when using methanol and water seem reasonable, taking into account the data reported by other authors.…”
Section: Resultssupporting
confidence: 91%
“…The porosity values of the methanol and 2-propanol-swollen membranes are nearly the same, whereas the wet porosity in water is much smaller than in alcohols. The behavior observed for the NF117 membrane is in agreement with that reported by others, 21,27,28 which found that the dimensions of channels connecting the swollen clusters and the size of the clusters were larger for an alcohol-swollen membrane than that for a water-swollen membrane. Moreover, the NF117 membrane porosity values obtained in this study when using methanol and water seem reasonable, taking into account the data reported by other authors.…”
Section: Resultssupporting
confidence: 91%
“…After rearrangement of (45), a quadratic expression for K is obtained, see (46). This quadratic expression can be solved resulting in (47).…”
Section: Appendix 2: Transport Equationsmentioning
confidence: 99%
“…The spectra were examined by applying a least squares approach [7,8]. A diffusion equation that describes molecular transport within a cylindrical pore [9][10][11] was used to predict the time dependent uptake of water into the membrane [1,3]. The analysis revealed bands for vibrational modes for the more hydrophobic polymer functional groups (-CF 2 and -C-O-C-) changed as predicted by the diffusion equation, whereas the response of the prominent band for the asymmetric S-O stretching mode of the hydrophilic -SO 3 -group (near 1064 cm -1 (Fig.…”
Section: Abstract Progress Report and Future Directionsmentioning
confidence: 99%