Open AccessTransport Properties of Nafion® Membranes in Concentrated Solution Environments
Author(s) -
Howard L. Yeager,
B. O'Dell,
Zbigniew Twardowski
Publication year - 1982
Publication title -
journal of the electrochemical society
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.258
H-Index - 271
eISSN - 1945-7111
pISSN - 0013-4651
DOI - 10.1149/1.2123797
Subject(s) - membrane , nafion , chemistry , electrolyte , ion exchange , water transport , sorption , sodium , alkali metal , ion transporter , inorganic chemistry , ionic bonding , aqueous solution , ion , chemical engineering , analytical chemistry (journal) , electrochemistry , chromatography , organic chemistry , electrode , environmental engineering , water flow , biochemistry , adsorption , engineering
The transport properties of perfluorinated cation exchange membranes in chlor\u2010alkali cell solution environments have been studied using a newly designed membrane test cell. A radiotracer\u2010weight method was used to measure sodium ion and water transport numbers for two Nafion\uae perfluorosulfonate membranes. A homogeneous film shows rapidly decreasing sodium ion transport numbers with increasing Formula catholyte concentration, reaching a value of 0.56 mol F\u22121 with 12.5M solution at 80\ub0C. A fabric\u2010backed material with a sulfonamide exchange site layer yields considerably higher values with a more complicated concentration dependence. Water transport numbers for the latter membrane are also higher; a value of about 3 mol F\u22121 is found for typical experiments in which the anolyte solution is Formula . Results are discussed in terms of the mechanism of ionic membrane transport in relation to polymer water and electrolyte sorption.Peer reviewed: YesNRC publication: Ye
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