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UNIVERSITY OF BUCHAREST
FACULTY OF PHYSICS Guest
2024-11-24 23:59 |
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Conference: Bucharest University Faculty of Physics 2015 Meeting
Section: Physics and Technology of Renewable and Alternative Energy Sources
Title:
Composites polimeric membranes based on cross-linked PVA-anionic exchange resin
Authors:
Cristina E. SERBAN (1), Adriana E. BALAN (1), Alexandra M. I. TREFILOV (1), Sanda VOINEA(1,2)
Affiliation:
1)University of Bucharest, Faculty of Physics, 3Nano-SAE Research Centre, Bucharest-Magurele, Romania
2)University of Bucharest, Faculty of Physics, Bucharest-Magurele, Romania
E-mail
sanda.voinea@3nanosae.org
Keywords:
poly-vinyl alcohol (PVA), poly-acrylonitrile (PAN), anion exchange resin (AER), Dr. Blade method
Abstract:
Recently, polymer electrolytes are consider to present excellent physico-chemical properties for electrochemical energy systems. Polyvinyl alcohol (PVA) is a low cost polymer with very good resistance in organic solvent, excellent flexibility and high adhesion to various surfaces. Due to the intrinsic complexity, its biocompatibility, non-toxicity, hydrophilic behaviour and mechanical properties, the PVA and its derivates have been intensively used as polymer electrolytes. The present study is focused on the synthesis of new types of anionic exchange membranes based on anionic exchange resin (Purolite A 400 MB OH-) for fuel cells applications. The first type of anionic membrane has been prepared from a mixture of 75% PAN (polyacrylonitrile) and 25% PVA in dimethyl sulfoxide (DMSO). The membranes have been obtained by dissolving both polymers in the presence of three anionic exchange resin with different ratio (5%, 20%, 50%). The resulted solution was casted in thin films onto three glass plates using a Dr. Blade device and then immersed in isopropyl alcohol solution 90% in water for coagulation. The characteristic properties of these composites membranes were investigated using DSC, TGA, IEC 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 at room temperature when the blended ration of AER was 5% from polymeric mixture.
Acknowledgement:
Serban Elena Cristina was supported by the strategic grant POSDRU/159/1.5/S/133652, ”Integrated system to improve the quality of doctoral and postdoctoral research in Romania and promotion of the role of science in society” cofinanced by the European Social Found within the Sectorial Operational Program Human Resources Development 2007 – 2013. This work was supported by a grant of the Romanian National Authority for Scientific Research, Program for research- Space Technology and Advanced Research - STAR, project number 15/2012 and PNCDI-II- project number 64/2011, PNCDI-II- project number 46/2014.
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