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Open AccessFeature PaperArticle
Membranes 2017, 7(2), 32; doi:10.3390/membranes7020032

Poly(vinylbenzylchloride) Based Anion-Exchange Blend Membranes (AEBMs): Influence of PEG Additive on Conductivity and Stability

1
Institute of Chemical Process Engineering, University of Stuttgart, 70199 Stuttgart, Germany
2
Faculty of Natural Science, North-West University, Focus Area: Chemical Resource Beneficiation, Potchefstroom 2520, South Africa
*
Author to whom correspondence should be addressed.
Academic Editor: Tongwen Xu
Received: 4 May 2017 / Revised: 31 May 2017 / Accepted: 7 June 2017 / Published: 16 June 2017
(This article belongs to the Special Issue Seven Years of Membranes: Feature Paper 2017)

Abstract

In view of the many possible applications such as fuel cells and electrolysers, recent interest in novel anion exchange membranes (AEMs) has increased significantly. However, their low conductivity and chemical stability limits their current suitability. In this study, the synthesis and characterization of several three- and four-component anion exchange blend membranes (AEBMs) is described, where the compositions have been systematically varied to study the influence of the AEBM’s composition on the anion conductivities as well as chemical and thermal stabilities under strongly alkaline conditions. It was shown that the epoxide-functionalized poly(ethylene glycol)s that were introduced into the four-component AEBMs resulted in increased conductivity as well as a marked improvement in the stability of the AEBMs in an alkaline environment. In addition, the thermal stability of the novel AEBMs was excellent showing the suitability of these membranes for several electrochemical applications. View Full-Text
Keywords: anion-exchange blend membrane; poly(vinylbenzylchloride); polybenzimidazole; ionic cross-link; Cl conductivity; impedance spectroscopy; TGA-FTIR coupling anion-exchange blend membrane; poly(vinylbenzylchloride); polybenzimidazole; ionic cross-link; Cl conductivity; impedance spectroscopy; TGA-FTIR coupling
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This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. (CC BY 4.0).

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MDPI and ACS Style

Kerres, J.A.; Krieg, H.M. Poly(vinylbenzylchloride) Based Anion-Exchange Blend Membranes (AEBMs): Influence of PEG Additive on Conductivity and Stability. Membranes 2017, 7, 32.

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