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dc.contributor.authorVan Nguyen, Trung
dc.contributor.authorVanderborgh, Nicholas
dc.date.accessioned2005-04-17T15:46:43Z
dc.date.available2005-04-17T15:46:43Z
dc.date.issued1998-05-27
dc.identifier.citationVan Nguyen, T; Vanderborgh, N. The rate of isothermal hydration of polyperfluorosulfonic acid membranes . JOURNAL OF MEMBRANE SCIENCE. May 27 1998. 143:235-248
dc.identifier.otherISI:000073900700020
dc.identifier.urihttp://hdl.handle.net/1808/296
dc.description.abstractWater transport rates through polyperfluorosulfonic acid membranes at relatively low water content (close to the fuel cell failure mode) were investigated using dynamic thermogravimetry. A model was developed to describe water transport within the membrane during the dynamic thermogravimetry experiment. Using the model, the experimental data, and a nonlinear regression technique, values for the effective diffusion coefficient of water in the Dow Chemical Company's experimental membrane samples of the same equivalent weight but of two different thickness, 10.16 µm and 17.78 µm, were obtained for temperatures of 60oC, 80oC, and 90oC. Results show that the effective diffusion coefficient of water in the membrane increases with water content and temperature. Values for the partition coefficient of water in these membranes at these temperatures are determined and found to be in close agreement with published values. Finally, rehydration of polyperfluorosulfonic acid membranes is found to be controlled by both the gas/solid interface and the diffusion of water into the inner structure of the membrane.
dc.format.extent20458 bytes
dc.format.extent391559 bytes
dc.format.mimetypeapplication/pdf
dc.format.mimetypeapplication/pdf
dc.language.isoen_US
dc.publisherELSEVIER SCIENCE BV
dc.subjectDiffusion
dc.subjectWater sorption and diffusion
dc.subjectDynamic thermogravimetric analysis
dc.subjectFuel cells
dc.titleThe rate of isothermal hydration of polyperfluorosulfonic acid membranes
dc.typeArticle
dc.identifier.doi10.1016/S0376-7388(98)00030-1
dc.rights.accessrightsopenAccess


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