Preparation of anion exchange membrane based on block copolymers. Part II: the effect of the formation of macroreticular structure on the membrane properties |
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| Affiliation: | 1. Japan Atomic Energy Research Institute, Shirakata Shirane 2-4, Tokai-mura,naka-gunIbaraki-ken, 319-1195Japan;2. Department of Material Science and Chemical Engineering, Yokohama National University, 79-5 Tokiwadai, Hodogaya-kuYokohama, 240-8501Japan;1. Electrochemical Innovation Lab, Department of Chemical Engineering, University College London, London, WC1E 7JE, United Kingdom;2. EPSRC “Frontier Engineering” Centre for Nature Inspired Engineering, Department of Chemical Engineering, University College London, London, WC1E 7JE, United Kingdom;3. Helmholtz-Zentrum Berlin (HZB), Hahn-Meitner-Platz 1, 14109 Berlin, Germany;1. Institute of Molecular Genetics, The Czech Academy of Sciences, Prague CZ – 142 20, Czech Republic;2. Institute of Parasitology, Biology Center, The Czech Academy of Sciences, České Budějovice CZ – 370 05, Czech Republic;3. Institute of Organic Chemistry and Biochemistry, The Czech Academy of Sciences, Prague CZ – 166 10, Czech Republic;4. First Faculty of Medicine, Charles University in Prague, Prague CZ – 121 08, Czech Republic;5. Dept. of Parasitology, Faculty of Science, Charles University in Prague, Prague CZ – 128 44, Czech Republic;6. Center for Discovery and Innovation in Parasitic Diseases and the Department of Pathology, University of California San Francisco, San Francisco, CA 94158, USA;7. Dept. of Pharmaceutical Chemistry, University of California San Francisco, San Francisco, CA 94158, USA |
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| Abstract: | The anion exchange membrane was prepared by conducting the formation of macroreticular structure and the introduction of ion exchange groups to the chloromethylated copolymers simultaneously. The membrane properties are summarized below; 0.9–1.4 Ω cm2 for area resistivity in 2 M KCl aqueous solution, 1.46–3.7 meq/g-dry-resin for the ion exchange capacity and 0.68–0.87 for the static transport number. The membrane properties of the membrane prepared by forming the macroreticular structure and the introduction of the ion exchange groups to the chloromethylated copolymers simultaneously (B membrane) had higher performance than that of the membrane prepared by the amination of the chloromethylated copolymers (A membrane). It would be expected that the formation of macroreticular structure in the membrane has an effect on the membrane properties. The chemical stability of B membrane which was determined by the oxidative degradation in 2 M nitric acid, had long lifetime with almost the same value of the area resistivity and ion exchange capacity as before durability test. |
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