Research output: Contribution to journal › Article › peer-review
In situ ATR-FTIR spectroscopic imaging of PVC, plasticizer and water in solvent-polymeric ion-selective membrane containing Cd2+-selective neutral ionophore. / Solovyeva, Elena V.; Lu, Huiqiang; Khripoun, Galina A.; Mikhelson, Konstantin N.; Kazarian, Sergei G.
In: Journal of Membrane Science, Vol. 619, 118798, 07.10.2020.Research output: Contribution to journal › Article › peer-review
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TY - JOUR
T1 - In situ ATR-FTIR spectroscopic imaging of PVC, plasticizer and water in solvent-polymeric ion-selective membrane containing Cd2+-selective neutral ionophore
AU - Solovyeva, Elena V.
AU - Lu, Huiqiang
AU - Khripoun, Galina A.
AU - Mikhelson, Konstantin N.
AU - Kazarian, Sergei G.
N1 - Funding Information: This study was partially supported by the Russian Foundation for basic Research , project 19-03-00259 . Publisher Copyright: © 2020 Elsevier B.V. Copyright: Copyright 2020 Elsevier B.V., All rights reserved.
PY - 2020/10/7
Y1 - 2020/10/7
N2 - Concentration profiles of water, polymer and plasticizer in the vicinity of the membrane/water interface were studied by in situ ATR-FTIR spectroscopic imaging with Cd2+-selective membranes as a model system. Two membrane compositions have been studied, both contained polyvinylchloride (PVC) as matrix, 2-nitrophenyl octyl ether (oNPOE) as plasticizer, Cd2+-selective neutral ionophore ETH 1062, and cadmium tetrakis (p-Cl-phenyl)borate as ion-exchanger. One of the membranes contained also a lipophilic electrolyte ETH 500. Prior to measurements, the membranes with overall thickness of 700 μm were equilibrated with water for 1 week. It is shown that in the membranes the surface layers with a thickness of 150 μm are enriched with water, whereas in the bulk of the membranes practically no water was detected. Overall water uptake and also kinetics of evaporation of absorbed water have been studied gravimetrically. Much slower process of leak of the membrane components to water was studied by UV–Vis absorption spectroscopy and gravimetrically, and ion-exchanger and plasticizer are identified as leaking components.
AB - Concentration profiles of water, polymer and plasticizer in the vicinity of the membrane/water interface were studied by in situ ATR-FTIR spectroscopic imaging with Cd2+-selective membranes as a model system. Two membrane compositions have been studied, both contained polyvinylchloride (PVC) as matrix, 2-nitrophenyl octyl ether (oNPOE) as plasticizer, Cd2+-selective neutral ionophore ETH 1062, and cadmium tetrakis (p-Cl-phenyl)borate as ion-exchanger. One of the membranes contained also a lipophilic electrolyte ETH 500. Prior to measurements, the membranes with overall thickness of 700 μm were equilibrated with water for 1 week. It is shown that in the membranes the surface layers with a thickness of 150 μm are enriched with water, whereas in the bulk of the membranes practically no water was detected. Overall water uptake and also kinetics of evaporation of absorbed water have been studied gravimetrically. Much slower process of leak of the membrane components to water was studied by UV–Vis absorption spectroscopy and gravimetrically, and ion-exchanger and plasticizer are identified as leaking components.
KW - In situ ATR-FTIR imaging
KW - Infrared spectroscopy
KW - Ionophore-based sensor membranes
KW - Leak of the membrane components
KW - Water uptake
UR - http://www.scopus.com/inward/record.url?scp=85092375736&partnerID=8YFLogxK
UR - https://www.mendeley.com/catalogue/3e0da904-3638-3c90-aedd-d7f30a9f8029/
U2 - 10.1016/j.memsci.2020.118798
DO - 10.1016/j.memsci.2020.118798
M3 - Article
AN - SCOPUS:85092375736
VL - 619
JO - Journal of Membrane Science
JF - Journal of Membrane Science
SN - 0376-7388
M1 - 118798
ER -
ID: 70651935