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Tuning physicochemical, electrochemical and transport characteristics of polymer inclusion membrane by varying the counter-anion of the ionic liquid Aliquat 336

Polymer inclusion membranes (PIMs) have been prepared using cellulose triacetate (CTA) as polymer and derivatives of the commercial ionic liquid (IL) Aliquat 336, trioctyl methylammonium chloride (AlqCl), as extractants. The different ILs were prepared by exchanging chloride anion from AlqCl for other more lipophilic anions, obtaining IL derivatives AlqNO 3 and AlqSCN. PIMs containing these extractants at two different concentrations (30% and 60%) were prepared and characterized using X-ray photoelectron spectroscopy (XPS), infrared spectroscopy (FTIR), thermogravimetric analysis (TGA), contact angle and impedance spectroscopy to obtain information on the material properties of both the surface and bulk membranes. The IL counter-anion affects the membrane’s electrical parameters (dielectric constant and conductivity) as well as its hydrophobic character, which also depends on the IL concentration in the PIM formulation. Passive transport across the different PIMs using HCl and NaCl aqueous solutions was also considered, and the results obtained seem to be directly related to the hydrophilic/hydrophobic character of the studied membranes

The financial support of the Spanish government through research project CTM2013-48967-C2-2-P is acknowledged. R. Vera acknowledges a grant from the Spanish Ministerio de Economía y Competitividad (ref. BES-2014-068314)

© Journal of Membrane Science, 2017, vol. 529, p. 87-94

Elsevier

Author: Vera Chamorro, Ruben
Gelde, L.
Anticó i Daró, Ma. Enriqueta
Martínez de Yuso, M.V.
Benavente, Juana
Fontàs Rigau, Clàudia
Date: 2017 May 1
Abstract: Polymer inclusion membranes (PIMs) have been prepared using cellulose triacetate (CTA) as polymer and derivatives of the commercial ionic liquid (IL) Aliquat 336, trioctyl methylammonium chloride (AlqCl), as extractants. The different ILs were prepared by exchanging chloride anion from AlqCl for other more lipophilic anions, obtaining IL derivatives AlqNO 3 and AlqSCN. PIMs containing these extractants at two different concentrations (30% and 60%) were prepared and characterized using X-ray photoelectron spectroscopy (XPS), infrared spectroscopy (FTIR), thermogravimetric analysis (TGA), contact angle and impedance spectroscopy to obtain information on the material properties of both the surface and bulk membranes. The IL counter-anion affects the membrane’s electrical parameters (dielectric constant and conductivity) as well as its hydrophobic character, which also depends on the IL concentration in the PIM formulation. Passive transport across the different PIMs using HCl and NaCl aqueous solutions was also considered, and the results obtained seem to be directly related to the hydrophilic/hydrophobic character of the studied membranes
The financial support of the Spanish government through research project CTM2013-48967-C2-2-P is acknowledged. R. Vera acknowledges a grant from the Spanish Ministerio de Economía y Competitividad (ref. BES-2014-068314)
Format: application/pdf
Citation: https://doi.org/10.1016/j.memsci.2017.01.055
ISSN: 0376-7388
Document access: http://hdl.handle.net/10256/14470
Language: eng
Publisher: Elsevier
Collection: MINECO/PE 2014-2016/CTM2013-48967-C2-2-P
Reproducció digital del document publicat a: https://doi.org/10.1016/j.memsci.2017.01.055
Articles publicats (D-Q)
Is part of: © Journal of Membrane Science, 2017, vol. 529, p. 87-94
Rights: Tots els drets reservats
Subject: Membranes (Tecnologia)
Membranes (Tecnologia)
Espectroscòpia d’impedància
Impedance spectroscopy
Anàlisi electroquímica
Electrochemical analysis
Title: Tuning physicochemical, electrochemical and transport characteristics of polymer inclusion membrane by varying the counter-anion of the ionic liquid Aliquat 336
Type: info:eu-repo/semantics/article
Repository: DUGiDocs

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