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Membranes 2013, 3(1), 1-15; doi:10.3390/membranes3010001
Article

Electrodialytic Transport Properties of Anion-Exchange Membranes Prepared from Poly(vinyl alcohol) and Poly(vinyl alcohol-co-methacryloyl aminopropyl trimethyl ammonium chloride)

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1,*  and 2
1 Graduate School of Science and Engineering, Yamaguchi University, 2-16-1 Tokiwadai, Ube, Yamaguchi 755-8611, Japan 2 VA-related Polymers Research Laboratory, Kurashiki Research Center, Kuraray, 2045-1 Sakazu, Kurashiki, Okayama 710-0801, Japan
* Author to whom correspondence should be addressed.
Received: 24 October 2012 / Revised: 18 December 2012 / Accepted: 19 December 2012 / Published: 2 January 2013
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Abstract

Random-type anion-exchange membranes (AEMs) have been prepared by blending poly(vinyl alcohol) (PVA) and the random copolymer-type polycation, poly(vinyl alcohol-co-methacryloyl aminopropyl trimethyl ammonium chloride) at various molar percentages of anion-exchange groups to vinyl alcohol groups, Cpc, and by cross-linking the PVA chains with glutaraldehyde (GA) solution at various GA concentrations, CGA. The characteristics of the random-type AEMs were compared with blend-type AEMs prepared in our previous study. At equal molar percentages of the anion exchange groups, the water content of the random-type AEMs was lower than that of the blend-type AEMs. The effective charge density of the random-type AEMs increased with increasing Cpc and reached a maximum value. Further, the maximum value of the effective charge density increased with increasing CGA. The maximum value of the effective charge density, 0.42 mol/dm3, was obtained for the random-type AEM with Cpc = 4.2 mol % and CGA = 0.15 vol %. A comparison of the random-type and blend-type AEMs with almost the same Cpc showed that the random-type AEMs had lower membrane resistance than the blend-type ones. The membrane resistance and dynamic transport number of the random-type AEM with Cpc = 6.0 mol % and CGA = 0.15 vol % were 4.8 Ω cm2 and 0.83, respectively.
Keywords: anion-exchange membrane; poly(vinyl alcohol-co-methacryloyl aminopropyl trimethyl ammonium chloride); poly(vinyl alcohol); water content; charge density; membrane resistance anion-exchange membrane; poly(vinyl alcohol-co-methacryloyl aminopropyl trimethyl ammonium chloride); poly(vinyl alcohol); water content; charge density; membrane resistance
This is an open access article distributed under the Creative Commons Attribution License (CC BY 3.0).
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Jikihara, A.; Ohashi, R.; Kakihana, Y.; Higa, M.; Kobayashi, K. Electrodialytic Transport Properties of Anion-Exchange Membranes Prepared from Poly(vinyl alcohol) and Poly(vinyl alcohol-co-methacryloyl aminopropyl trimethyl ammonium chloride). Membranes 2013, 3, 1-15.

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