Swelling of Nafion in Methanol–Water–Inorganic Salt Ternary Mixtures

0339104 - ÚCHP 2010 RIV CH eng J - Journal Article
Randová, A. - Hovorka, Š. - Izák, Pavel - Bartovská, L.
Swelling of Nafion in Methanol–Water–Inorganic Salt Ternary Mixtures.
Journal of Electroanalytical Chemistry. Roč. 616, 1-2 (2008), s. 117-121. ISSN 1572-6657. E-ISSN 1873-2569
R&D Projects: GA ČR GA104/08/0600
Institutional research plan: CEZ:AV0Z40720504
Keywords : nafion * swelling * methanol
Subject RIV: CI - Industrial Chemistry, Chemical Engineering
Impact factor: 2.484, year: 2008

The anisotropic swelling of Nafion 112 foil in methanol–water–inorganic salt was examined by the optical method. Our results show that even small addition of inorganic salt into methanol–water mixture affects kinetics as well as the swelling equilibrium. The effect of inorganic salts LiCl, NaCl, KCl, CsCl, CaCl2, CdCl2, K2CO3, KNO3, NH4Cl, and AgNO3 was studied. Swelling kinetics of Nafion in ternary mixtures including salt show maximum suggesting that in the beginning stage of swelling the diffusion of methanol is faster than ion transport. The experimental data, presented in this work, allow us to assume that swelling of Nafion decreases with increasing ionic radius of cation.
Permanent Link: http://hdl.handle.net/11104/0182708