Bulletin of the Society of Sea Water Science, Japan
Online ISSN : 2185-9213
Print ISSN : 0369-4550
ISSN-L : 0369-4550
Short Paper
Ion Exchange Membranes Prepared from Poly(vinyl alcohol)-based Block copolymer: Temperature Dependence of Membrane Properties
Wu YANGMasahiro YASUKAWAMitsuru HIGA
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2017 Volume 71 Issue 6 Pages 348-349

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Abstract
We investigated the temperature dependence of the membrane properties of poly(vinyl alcohol)(PVA)-based ion-exchange membranes(IEMs): an anion-exchange membrane(PVA-AEM)and a cation-exchange membrane(PVA-CEM)to measure the water content, transport number and membrane resistance of the IEMs at various temperatures(from 10 to 50 ℃). The water content of the IEMs was higher than that of commercial IEMs: Neosepta® CMX and AMX, especially at high temperatures. The transport numbers of PVA-CEM and PVA-AEM at 10 ℃ were 0.97 and 0.98, respectively, almost the same as that of the commercial IEMs. The transport numbers of the IEMs as well as the commercial IEMs decreased with increasing temperature; however, PVA-CEM and PVA-AEM still had relative high transport numbers, 0.90 and 0.92, respectively, at 50 ℃. The membrane resistance of PVA-CEM and PVA-AEM were lower than that of CMX and AMX, respectively, at all the measured temperatures.
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© 2017 The Society of Sea Water Science, Japan
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