TY - JOUR
T1 - Hybrid polyelectrolyte-anion exchange membrane and its interaction with phosphate
AU - Paltrinieri, Laura
AU - Poltorak, Lukasz
AU - Chu, Liangyong
AU - Puts, Theo
AU - van Baak, Willem
AU - Sudhölter, Ernst J.R.
AU - de Smet, Louis C.P.M.
PY - 2018
Y1 - 2018
N2 - We have investigated in detail properties of hybrid polyelectrolyte-anion exchange membranes (AEMs) having different amounts of a guanidinium-modified poly(allylamine hydrochloride) (PAH-Gu) derivative (2, 5, and 8 wt%). The presence of guanidinium groups at the membrane surface was confirmed by XPS. For 2 and 5 wt% the blended membranes are homogeneous, while at 8 wt% segregation is observed by AFM. The membrane permselectivity and ionic electrical resistance for phosphate reduce upon incorporation of the PAH-Gu in the membrane, reflecting an increased co-ion (H+ and Na+) permeation. We conclude that PAH-Gu loaded in the AEM favors an interaction with phosphate. In electrodialysis, using sodium sulfate and sodium dihydrogen phosphate at equal concentrations in the source phase a slight preference for phosphate was observed. Our work shows that this facile membrane fabrication procedure shows great potential in terms of tuning the membrane properties. One way to boost selective ion transport could be by increasing the number of functional groups in the membrane.
AB - We have investigated in detail properties of hybrid polyelectrolyte-anion exchange membranes (AEMs) having different amounts of a guanidinium-modified poly(allylamine hydrochloride) (PAH-Gu) derivative (2, 5, and 8 wt%). The presence of guanidinium groups at the membrane surface was confirmed by XPS. For 2 and 5 wt% the blended membranes are homogeneous, while at 8 wt% segregation is observed by AFM. The membrane permselectivity and ionic electrical resistance for phosphate reduce upon incorporation of the PAH-Gu in the membrane, reflecting an increased co-ion (H+ and Na+) permeation. We conclude that PAH-Gu loaded in the AEM favors an interaction with phosphate. In electrodialysis, using sodium sulfate and sodium dihydrogen phosphate at equal concentrations in the source phase a slight preference for phosphate was observed. Our work shows that this facile membrane fabrication procedure shows great potential in terms of tuning the membrane properties. One way to boost selective ion transport could be by increasing the number of functional groups in the membrane.
KW - Anion-exchange membrane
KW - Electrodialysis
KW - Interaction
KW - Phosphate
KW - Sulfate
UR - http://www.scopus.com/inward/record.url?scp=85055659587&partnerID=8YFLogxK
U2 - 10.1016/j.reactfunctpolym.2018.10.005
DO - 10.1016/j.reactfunctpolym.2018.10.005
M3 - Article
AN - SCOPUS:85055659587
SN - 1381-5148
VL - 133
SP - 126
EP - 135
JO - Reactive and Functional Polymers
JF - Reactive and Functional Polymers
ER -