Next Article in Journal
Bioglass-Incorporated Methacrylated Gelatin Cryogel for Regeneration of Bone Defects
Previous Article in Journal
New Pyridinium Type Poly(Ionic Liquids) as Membranes for CO2 Separation
Article Menu
Issue 8 (August) cover image

Export Article

Open AccessArticle
Polymers 2018, 10(8), 913; https://doi.org/10.3390/polym10080913

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

1
Department of Chemical and Biomolecular Engineering, Universidad de Cantabria, 39005 Santander, Spain
2
Department of Physical Chemistry and Institute of Electrochemistry, University of Alicante, 03080 Alicante, Spain
3
CELLS—ALBA Synchrotron Radiation Facility, Carrer de la Llum 2-26, 08290 Cerdanyola del Vallès, Barcelona, Spain
4
Department of Chemical and Environmental Engineering, Instituto de Nanociencia de Aragón, Universidad de Zaragoza, 50018 Zaragoza, Spain
5
Networking Research Center on Bioengineering, Biomaterials and Nanomedicine, CIBER-BBN, 28029 Madrid, Spain
*
Author to whom correspondence should be addressed.
Received: 6 July 2018 / Revised: 3 August 2018 / Accepted: 9 August 2018 / Published: 13 August 2018
Full-Text   |   PDF [4122 KB, uploaded 13 August 2018]   |  

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. View Full-Text
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) 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)
Figures

Graphical abstract

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).

Supplementary material

SciFeed

Share & Cite This Article

MDPI and ACS Style

Marcos-Madrazo, A.; Casado-Coterillo, C.; García-Cruz, L.; Iniesta, J.; Simonelli, L.; Sebastián, V.; Encabo-Berzosa, M.M.; Arruebo, M.; Irabien, Á. Preparation and Identification of Optimal Synthesis Conditions for a Novel Alkaline Anion-Exchange Membrane. Polymers 2018, 10, 913.

Show more citation formats Show less citations formats

Note that from the first issue of 2016, MDPI journals use article numbers instead of page numbers. See further details here.

Related Articles

Article Metrics

Article Access Statistics

1

Comments

[Return to top]
Polymers EISSN 2073-4360 Published by MDPI AG, Basel, Switzerland RSS E-Mail Table of Contents Alert
Back to Top