Kakihana, Yuriko and Hashim, N. Awanis and Mizuno, Taiko and Anno, Marika and Higa, Mitsuru (2021) Ionic transport properties of cation-exchange membranes prepared from Poly(vinyl alcohol-b-sodium Styrene Sulfonate). Membranes, 11 (6). ISSN 2077-0375, DOI https://doi.org/10.3390/membranes11060452.
Full text not available from this repository.Abstract
Membrane resistance and permselectivity for counter-ions have important roles in determining the performance of cation-exchange membranes (CEMs). In this study, PVA-based polyanions-poly(vinyl alcohol-b-sodium styrene sulfonate)-were synthesized, changing the molar percentages C-CEG of the cation-exchange groups with respect to the vinyl alcohol groups. From the block copolymer, poly(vinyl alcohol) (PVA)-based CEMs, hereafter called ``B-CEMs'', were prepared by crosslinking the PVA chains with glutaraldehyde (GA) solution at various GA concentrations C-GA. The ionic transport properties of the B-CEMs were compared with those previously reported for the CEMs prepared using a random copolymer-poly(vinyl alcohol-co-2-acrylamido-2-methylpropane sulfonic acid)-hereafter called ``R-CEMs''. The B-CEMs had lower water content than the R-CEMs at equal molar percentages of the cation-exchange groups. The charge density of the B-CEMs increased as C-CEG increased, and reached a maximum value, which increased with increasing C-GA. A maximum charge density of 1.47 mol/dm(3) was obtained for a B-CEM with C-CEG = 2.9 mol% and C-GA = 0.10 vol.%, indicating that the B-CEM had almost two-thirds of the permselectivity of a commercial CEM (CMX: ASTOM Corp. Japan). The dynamic transport number and membrane resistance of a B-CEM with C-CEG = 8.3 mol% and C-GA = 0.10 vol.% were 0.99 and 1.6 omega cm(2), respectively. The B-CEM showed higher dynamic transport numbers than those of the R-CEMs with similar membrane resistances.
| Item Type: | Article |
|---|---|
| Funders: | Ministry of Education, Culture, Sports, Science and Technology, Japan (MEXT) Japan Society for the Promotion of Science Grants-in-Aid for Scientific Research (KAKENHI) (JP16H01796), Ministry of Education, Culture, Sports, Science and Technology, Japan (MEXT) Japan Society for the Promotion of Science Grants-in-Aid for Scientific Research (KAKENHI) (JP21H04942), Salt Science Research Foundation (0612), Salt Science Research Foundation (0709), Salt Science Research Foundation (0810) |
| Uncontrolled Keywords: | Poly(vinyl alcohol); Block copolymer; Membrane resistance; Transport number; Cation-exchange membrane |
| Subjects: | T Technology > TP Chemical technology |
| Divisions: | Faculty of Engineering > Department of Chemical Engineering |
| Depositing User: | Ms Zaharah Ramly |
| Date Deposited: | 24 Jun 2022 08:22 |
| Last Modified: | 24 Jun 2022 08:22 |
| URI: | http://eprints.um.edu.my/id/eprint/27982 |
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