Preparation and characterization of novel chitosan-based mixed matrix membranes resistant in alkaline media
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http://hdl.handle.net/10045/53158
Títol: | Preparation and characterization of novel chitosan-based mixed matrix membranes resistant in alkaline media |
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Autors: | García Cruz, Leticia | Casado-Coterillo, Clara | Iniesta, Jesus | Montiel, Vicente | Irabien, Ángel |
Grups d'investigació o GITE: | Electroquímica Aplicada y Electrocatálisis |
Centre, Departament o Servei: | Universidad de Alicante. Departamento de Química Física | Universidad de Alicante. Instituto Universitario de Electroquímica |
Paraules clau: | Batteries and fuel cells | Composites | Electrochemistry | Membranes | Porous materials |
Àrees de coneixement: | Química Física |
Data de publicació: | 5-d’agost-2015 |
Editor: | Wiley Periodicals |
Citació bibliogràfica: | Journal of Applied Polymer Science. 2015, 132(29): 42240. doi:10.1002/app.42240 |
Resum: | In this work, mixed matrix membranes (MMMs) based on chitosan (CS) and different fillers (room temperature ionic liquid [emim][OAc] (IL), metallic Sn powder, layered titanosilicate AM-4 and layered stannosilicate UZAR-S3) were prepared by solution casting. The room temperature electrical conductivity and electrochemical response in strong alkaline medium were measured by electrochemical impedance spectroscopy and cyclic voltammetry (CV). The ionic conductivity of pure CS membranes was enhanced, from 0.070 to 0.126 mS cm−1, for the pristine CS and Sn/CS membranes, respectively, as a function of the hydrophilic nature of the membrane and the coordination state of Sn. This hydrophilic and charge nature was corroborated by water uptake measurements, where only the introduction of IL in the CS membrane led to a water uptake of 3.96 wt %, 20 or 30 times lower than the other membranes. Good thermal and chemical stability in alkaline media were observed by thermogravimetric analyses and X-ray photoelectron spectroscopy analyses, respectively, and good interaction between CS and the fillers observed by X-ray diffraction, scanning electron microscopy and CV. Thus, thin CS-based MMMs (40–139 µm), resistant in high alkaline media, show higher conductivity than pure CS membranes, especially those fillers containing tin, and although the electrochemical performance is lower than commercially available anion-exchange membranes they have potential in pervaporation. |
Patrocinadors: | This work has been funded by the Spanish MINECO through grants CTQ2010-20347, at the University of Alicante, and CTQ2012-31229 and RYC2011-08550, at the University of Cantabria. |
URI: | http://hdl.handle.net/10045/53158 |
ISSN: | 0021-8995 (Print) | 1097-4628 (Online) |
DOI: | 10.1002/app.42240 |
Idioma: | eng |
Tipus: | info:eu-repo/semantics/article |
Drets: | © 2015 Wiley Periodicals, Inc. |
Revisió científica: | si |
Versió de l'editor: | http://dx.doi.org/10.1002/app.42240 |
Apareix a la col·lecció: | INV - LEQA - Artículos de Revistas |
Arxius per aquest ítem:
Arxiu | Descripció | Tamany | Format | |
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2015_Garcia-Cruz_etal_JAPS_final.pdf | Versión final (acceso restringido) | 671,82 kB | Adobe PDF | Obrir Sol·licitar una còpia |
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