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UNIVERSITY OF BUCHAREST
FACULTY OF PHYSICS Guest
2024-11-22 2:36 |
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Conference: Bucharest University Faculty of Physics 2013 Meeting
Section: Polymer Physics
Title:
Synthesis and characterization of hybrid Anionic Exchange Membranes (AEMs) based on PVA
Authors:
Cristina E. Serban, Adriana Balan, Adrian C. Marinescu, Alexandra M. I. Trefilov, Ioan Stamatin
Affiliation:
University of Bucharest, Faculty of Physics, 3Nano-SAE Research Center, 405 Atomistilor str., Bucharest-Magurele, 077125.
E-mail
andronie@3nanosae.org
Keywords:
PVA, AEM, Purolite, ionic exchange resin.
Abstract:
The present study is focused on the synthesis of new types of anionic exchange hybrid membranes based on PVAfor alkaline fuel cells applications.Poly vinyl alcohol is a low cost polymer and has the unique characterizations of very good resistance of organic solvent, excellent flexibility and high adhesion to various surfaces. The premier type of anionic membrane has been prepared from a mixture of 75% PAN (polyacrylonitrile) and 25% PVA in dimethyl sulfoxide(DMSO). The desired mixture has been obtained by dissolving the both polymers in the presence of three different ratio (5%, 20%, 50%) of anionic exchange resin (Purolite A 400 MB OH-), these percentages were calculated as ratios to the weight of both polymer used. The resulted solution was deposited in thin films onto three glass plates using a Dr. Blade device and then immersed in isopropanol solution90% in water for coagulation. The characteristic properties of these composites membranes were investigated using DSC, TGA and EIS using as reference an anionic membrane AMI 7001s. The maximum of anionic conductivity of the membranes composites was about 1.39 mS∙cm-1at room temperature when the blended ration of AER was 5%from polymeric mixture. The experimental results showed that the PVA-PAN-Resin membrane has an excellent mechanical strength and a good electrochemical stability.
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