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Ionic Transport Properties of Cation-Exchange Membranes Prepared from Poly(vinyl alcohol-b-sodium Styrene Sulfonate)
- Source :
- Membranes, Membranes, Vol 11, Iss 452, p 452 (2021), Volume 11, Issue 6
- Publication Year :
- 2021
- Publisher :
- MDPI AG, 2021.
-
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 CCEG 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 CGA. 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 CCEG increased, and reached a maximum value, which increased with increasing CGA. A maximum charge density of 1.47 mol/dm3 was obtained for a B-CEM with CCEG = 2.9 mol% and CGA = 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 CCEG = 8.3 mol% and CGA = 0.10 vol.% were 0.99 and 1.6 Ωcm2, respectively. The B-CEM showed higher dynamic transport numbers than those of the R-CEMs with similar membrane resistances.
- Subjects :
- Vinyl alcohol
viruses
Sodium
chemistry.chemical_element
block copolymer
Filtration and Separation
TP1-1185
02 engineering and technology
Sulfonic acid
010402 general chemistry
01 natural sciences
Article
membrane resistance
Styrene
chemistry.chemical_compound
Chemical engineering
immune system diseases
hemic and lymphatic diseases
Copolymer
Chemical Engineering (miscellaneous)
chemistry.chemical_classification
Chemical technology
Process Chemistry and Technology
transport number
hemic and immune systems
cation-exchange membrane
021001 nanoscience & nanotechnology
poly(vinyl alcohol)
0104 chemical sciences
Sulfonate
Membrane
chemistry
TP155-156
Glutaraldehyde
0210 nano-technology
Nuclear chemistry
Subjects
Details
- ISSN :
- 20770375
- Volume :
- 11
- Database :
- OpenAIRE
- Journal :
- Membranes
- Accession number :
- edsair.doi.dedup.....4f1885b880baa9c259e322a6590cb001