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Novel anion exchange membranes having fluorocarbon backbone: Preparation and stability
Author(s) -
Matsui Kiyohide,
Tobita Etsuko,
Sugimoto Kikuo,
Kondo Kiyosi,
Seita Toru,
Akimoto Akira
Publication year - 1986
Publication title -
journal of applied polymer science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.575
H-Index - 166
eISSN - 1097-4628
pISSN - 0021-8995
DOI - 10.1002/app.1986.070320327
Subject(s) - membrane , nafion , chemistry , ion exchange , polymer chemistry , oxidizing agent , chemical modification , alkyl , chemical stability , sulfonic acid , aqueous solution , ionomer , inorganic chemistry , organic chemistry , chemical engineering , ion , copolymer , electrochemistry , polymer , biochemistry , electrode , engineering
Anion exchange membranes with excellent durability were prepared by chemical modification of Nafion. The modification was achieved by transformation of the sulfonic acid group into quaternary ammonium group. Namely, Nafion membrane was first converted into an amide‐type membrane. Reduction of the carbonxyl group to methylene followed by quaternarization with alkyl iodide resulted in the formation of an anion exchange membrane. The electric resistance of the resulting membranes depends on the equivalent weight of the starting membranes (4.4–6.0 Ω cm 2 in 0.5N NaCl). The characteristics of the membranes are the excellent stability toward chemical substances such as organic solvents, oxidizing agents, acids, etc. For example, the membranes are stable in aqueous saturated chlorine solution at 60°C for 1000 hr.