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.
|Number of pages||6|
|Journal||Journal of the Electrochemical Society|
|Publication status||Published - 2 Feb 2018|
|MoE publication type||A1 Journal article-refereed|
|Event||Electrochemical Society Meeting - New Orleans, United States|
Duration: 28 May 2017 → 2 Jun 2017
Conference number: 231