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

Language
en
Document Type
Article
Issue Date
2022-01-31
First published
2018-02-02
Issue Year
2018
Authors
Hakanpää, Janina
Yliniemi, Kirsi
Wilson, Benjamin P.
Putkonen, Matti
Höhn, Sarah
Kontturi, Eero
Virtanen, Sannakaisa
Murtomäki, Lasse
Editor
Publisher
The Electrochemical Society
Abstract

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.

Journal Title
Journal of The Electrochemical Society
Volume
165
Issue
2
Citation

Journal of The Electrochemical Society 165.2 (2018): H39-H44. https://iopscience.iop.org/article/10.1149/2.1231802jes

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