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

Janina Hakanpää, Kirsi Yliniemi, Benjamin Wilson, Matti Putkonen, Sarah Höhn, Eero Kontturi, Sannakaisa Virtanen, Lasse Murtomäki

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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.
Original languageEnglish
Pages (from-to)H39-H44
Number of pages6
JournalJournal of the Electrochemical Society
Issue number2
Publication statusPublished - 2 Feb 2018
MoE publication typeA1 Journal article-refereed
EventElectrochemical Society Meeting - New Orleans, United States
Duration: 28 May 20172 Jun 2017
Conference number: 231


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