@article{10902/9831,
year = {2015},
url = {http://hdl.handle.net/10902/9831},
abstract = {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 cm21, 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 mm), 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.},
organization = {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. The authors gratefully thank Prof. Frank Marken, from the University of Bath (UK), for his advice on the electrochemical impedance characterization, and Dr. César Rubio, Dr. Carlos Téllez, and Prof. Joaquín Coronas, from the University of Zaragoza and the Instituto de Nanociencia de Aragón, Spain, for the UZAR-S3 sample and fruitful discussions.},
publisher = {John Wiley and Sons Inc.},
publisher = {Journal of Applied Polymer Science, 2015, 132, 42240},
title = {Preparation and characterization of novel chitosan-based mixed matrix membranes resistant in alkaline media},
author = {García-Cruz, Leticia and Casado Coterillo, Clara and Iniesta Valcárcel, Jesús and Montiel Leguey, Vicente and Irabien Gulías, Ángel},
}