Time-Dependent Behavior of Cation Transport through Cellulose Acetate-Cationic Polyelectrolyte Membranes

Cation transport through a cellulose acetate-poly(N,N-dimethylaminoethyl methacrylate) membrane (CA:PDMAEMA) was studied with scanning electrochemical microscope (SECM) and the thickness increase of the membrane was monitored with ellipsometry. Upon addition of the polyelectrolyte PDMAEMA, the perme...

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Published inJournal of the Electrochemical Society Vol. 165; no. 2; pp. H39 - H44
Main Authors Hakanpää, Janina, Yliniemi, Kirsi, Wilson, Benjamin P., Putkonen, Matti, Höhn, Sarah, Kontturi, Eero, Virtanen, Sannakaisa, Murtomäki, Lasse
Format Journal Article
LanguageEnglish
Published The Electrochemical Society 01.01.2018
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Summary:Cation transport through a cellulose acetate-poly(N,N-dimethylaminoethyl methacrylate) membrane (CA:PDMAEMA) was studied with scanning electrochemical microscope (SECM) and the thickness increase of the membrane was monitored with ellipsometry. Upon addition of the polyelectrolyte PDMAEMA, the permeability of the probe cation (ferrocenium methanol, FcMeOH) was increased as much as 40-fold. Soaking membranes in an electrolyte solution doubled the permeability in plain CA membranes, whereas for PDMAEMA containing membranes the opposite was observed and the permeability was reduced by 20-40%. This time-dependent behavior is shown to be a result of the presence of PDMAEMA within the membrane matrix, thus providing an interesting platform for controllable membrane permeability.
Bibliography:1231802JES
ISSN:0013-4651
1945-7111
DOI:10.1149/2.1231802jes