Preparation and Identification of Optimal Synthesis Conditions for a Novel Alkaline Anion-Exchange Membrane

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Title: Preparation and Identification of Optimal Synthesis Conditions for a Novel Alkaline Anion-Exchange Membrane
Authors: Marcos-Madrazo, Aitor | Casado-Coterillo, Clara | García Cruz, Leticia | Iniesta, Jesus | Simonelli, Laura | Sebastián, Víctor | Encabo-Berzosa, María del Mar | Arruebo, Manuel | Irabien, Ángel
Research Group/s: Electroquímica Aplicada y Electrocatálisis
Center, Department or Service: Universidad de Alicante. Departamento de Química Física | Universidad de Alicante. Instituto Universitario de Electroquímica
Keywords: Ion exchange membranes | Renewable and economic polymers | Copper based fillers | ANOVA | Regression analysis | Water vapor permeability (WVP) | Anion conductivity | X-ray absorption near edge structure (XANES)
Knowledge Area: Química Física
Issue Date: 13-Aug-2018
Publisher: MDPI
Citation: Marcos-Madrazo A, Casado-Coterillo C, García-Cruz L, Iniesta J, Simonelli L, Sebastián V, Encabo-Berzosa MM, Arruebo M, Irabien Á. Preparation and Identification of Optimal Synthesis Conditions for a Novel Alkaline Anion-Exchange Membrane. Polymers. 2018; 10(8):913. doi:10.3390/polym10080913
Abstract: The physicochemical and mechanical properties of new alkaline anion-exchange membranes (AAEMs) based on chitosan (CS) and poly(vinyl alcohol) (PVA) polymers doped with unsupported copper nanoparticles (NPs) and copper exchanged over different porous materials were investigated regarding ion-exchange capacity (IEC), OH− conductivity, water uptake (WU), water vapor permeability (WVP), and thermal and mechanical resistance. The influence of the type of filler included in different morphologies and filler loading has been explored using copper exchanged materials such as the layered porous titanosilicate AM-4, layered stannosilicate UZAR-S3, and zeolites Y, MOR, and BEA. Compared to commercially available anion-exchange membranes, the best performing membranes in terms of WU, IEC, OH− conductivity and WVP in this study were those containing 10 wt % of Cu-AM-4 and Cu-UZAR-S3, although 10 wt % Cu-MOR provided better mechanical strength at close values of WVP and anion conductivity. It was also observed that when Cu was exchanged in a porous silicate matrix, its oxidation state was lower than when embedded as unsupported metal NPs. In addition, the statistical analysis of variance determined that the electrochemical properties of the membranes were noticeably affected by both the type and filler loading, and influenced also by the copper oxidation state and content in the membrane, but their hydrophilic properties were more affected by the polymers. The largest significant effects were noticed on the water sorption and transport properties, which gives scope for the design of AAEMs for electrochemical and water treatment applications.
Sponsor: This research was funded by Spanish Ministry of Science, Innovation, and Universities under project number CTQ2016-76231-C2-1-R at the Universidad de Cantabria.
URI: http://hdl.handle.net/10045/78431
ISSN: 2073-4360
DOI: 10.3390/polym10080913
Language: eng
Type: info:eu-repo/semantics/article
Rights: © 2018 by the authors. Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (http://creativecommons.org/licenses/by/4.0/).
Peer Review: si
Publisher version: https://doi.org/10.3390/polym10080913
Appears in Collections:INV - LEQA - Artículos de Revistas

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