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Proton‐conducting polymers with reduced methanol permeation
Author(s) -
Walker M.,
Baumgärtner K.M.,
Kaiser M.,
Kerres J.,
Ullrich A.,
Räuchle E.
Publication year - 1999
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/(sici)1097-4628(19991003)74:1<67::aid-app7>3.0.co;2-2
Subject(s) - methanol , permeation , membrane , nafion , polymer , polymer chemistry , permeability (electromagnetism) , materials science , chemical engineering , analytical chemistry (journal) , chemistry , chromatography , organic chemistry , composite material , electrode , engineering , electrochemistry , biochemistry
The permeability of Nafion®117 and some types of acid‐base and covalently crosslinked blend membranes to methanol was investigated. The methanol crossover was measured as a function of time using a gas chromatograph with a flame ionization detector. In comparison to Nafion, the investigated acid‐base and covalently crosslinked blend membranes show a significant lower permeation rate to methanol. Additionally, another method to reduce the methanol permeability is presented. In this concept a thin barrier layer is plasma polymerized on Nafion 117 membranes. It is shown that a plasma polymer layer with a thickness of 0.3 µm reduces the permeability to methanol by an order of magnitude. © 1999 John Wiley & Sons, Inc. J Appl Polym Sci 74: 67–73, 1999