TY - JOUR
T1 - Time-Dependent Behavior of Cation Transport through Cellulose Acetate-Cationic Polyelectrolyte Membranes
AU - Hakanpää, Janina
AU - Yliniemi, Kirsi
AU - Wilson, Benjamin
AU - Putkonen, Matti
AU - Höhn, Sarah
AU - Kontturi, Eero
AU - Virtanen, Sannakaisa
AU - Murtomäki, Lasse
N1 - Conference code: 231
PY - 2018/2/2
Y1 - 2018/2/2
N2 - 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.
AB - 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.
U2 - 10.1149/2.1231802jes
DO - 10.1149/2.1231802jes
M3 - Article
SN - 0013-4651
VL - 165
SP - H39-H44
JO - Journal of the Electrochemical Society
JF - Journal of the Electrochemical Society
IS - 2
T2 - Electrochemical Society Meeting
Y2 - 28 May 2017 through 2 June 2017
ER -