Cross-linked anion exchange membranes with hydrophobic side-chains for anion separation
| Autor: | Tingting Xu, Guanghan Wang, Tianyi He, Chuanrun Li, Bin Wu, Fangmeng Sheng, Liang Ge, Xuemei Ren, Dongbo Yu, Cao Ming, Muhmmad Aamir Shehzad |
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| Rok vydání: | 2019 |
| Předmět: |
Ion exchange
Chemistry Small-angle X-ray scattering Membrane structure Filtration and Separation 02 engineering and technology 010402 general chemistry 021001 nanoscience & nanotechnology 01 natural sciences Biochemistry 0104 chemical sciences Ion Membrane X-ray photoelectron spectroscopy Chemical engineering Side chain Molecule General Materials Science Physical and Theoretical Chemistry 0210 nano-technology |
| Zdroj: | Journal of Membrane Science. 581:150-157 |
| ISSN: | 0376-7388 |
| DOI: | 10.1016/j.memsci.2019.03.059 |
| Popis: | In this work, high performance cross-linked anion exchange membranes with hydrophobic side-chains were prepared via quaternization reaction and a simple heat treatment. The cross-linked membrane structure, the hydrophobic side-chain and the micro-phase separated morphology of membranes have synergistic effect on ion selective separation. Accordingly, the obtained membranes possess excellent ion perm-selectivity and considerable OH− flux. Especially, QPPO-C6-120 membrane exhibits the superior perm-selectivity of 76 for OH−/ W O 4 2 − system and high OH− flux of 2.72 × 10−7 mol cm−2 s−1 at a current density of 30 mA cm−2. XPS and 1H NMR confirmed the introduction of long side-chain and the thermo-crosslinking reaction. Meanwhile, the microstructure of membranes was investigated by XRD and SAXS. More importantly, a new perspective of mesoscales by combining the molecule structure with the microstructure of membranes is innovatively used to explore the ion separation mechanism. |
| Databáze: | OpenAIRE |
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