Fabrication of cation exchange membrane from polyvinyl alcohol using lignin sulfonic acid: Applications in diffusion dialysis process for alkali recovery |
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| Authors: | Noor Ul Afsar Dongbo Yu Congliang Cheng Kamana Emmanuel Liang Ge Bin Wu |
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| Affiliation: | CAS Key Laboratory of Soft Matter Chemistry, Collaborative Innovation Center of Chemistry for Energy Materials, School of Chemistry and Material Science, University of Science and Technology of China, Hefei, P.R. China |
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| Abstract: | We report polyvinyl alcohol (PVA)-based hybrid membranes composed of salt of lignin sulfonic acid (LSA) and tetraethyl orthosilicate. The concentration of LSA with respect to PVA varied from 10% to 40%. The hybrid membranes showed water uptake (WU) in the range of 122–210%, ion exchange capacities in the range of 0.32–0.75 mmol g?1, dialysis coefficient (UOH) from 0.0068 to 0.0119 m h?1, and selectivity (S) from 15 to 26. The hybrid membranes also showed thermal and mechanical stability. |
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| Keywords: | Base recovery cation exchange membrane diffusion dialysis lignin sulfonic acid polyvinyl alcohol |
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