Poly(alkyl-biphenyl pyridinium)-Based Anion Exchange Membranes with Alkyl Side Chains Enable High Anion Permselectivity and Monovalent Ion Flux
Poly(alkyl-biphenyl pyridinium)-based anion exchange membranes with alkyl side chains were synthesized for permselective anion separation. By altering the length of the grafted side chain, the hydrophilicity and other attributes of the membranes could be controlled. The QDPAB-C5 membrane with the be...
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| Format: | Article |
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MDPI AG
2023-02-01
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| Series: | Membranes |
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| Online Access: | https://www.mdpi.com/2077-0375/13/2/188 |
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| author | Jin Yang Qian Chen Noor Ul Afsar Liang Ge Tongwen Xu |
| author_facet | Jin Yang Qian Chen Noor Ul Afsar Liang Ge Tongwen Xu |
| author_sort | Jin Yang |
| collection | DOAJ |
| description | Poly(alkyl-biphenyl pyridinium)-based anion exchange membranes with alkyl side chains were synthesized for permselective anion separation. By altering the length of the grafted side chain, the hydrophilicity and other attributes of the membranes could be controlled. The QDPAB-C5 membrane with the best comprehensive performance exhibited a Cl<sup>−</sup> ion flux of 3.72 mol m<sup>−2</sup> h<sup>−1</sup> and a Cl<sup>−</sup>/SO<sub>4</sub><sup>2−</sup> permselectivity of 15, which are significantly better than the commercial Neosepta ACS membrane. The QDPAB-C5 membranes with distinct microscopic phase separation structures formed interconnected hydrophilic/hydrophobic ion channels and exhibited excellent ion flux and permselectivity for other anionic systems (NO<sub>3</sub><sup>−</sup>/SO<sub>4</sub><sup>2−</sup>, Br<sup>−</sup>/SO<sub>4</sub><sup>2−</sup>, F<sup>−</sup>/SO<sub>4</sub><sup>2−</sup>, NO<sub>3</sub><sup>−</sup>/Cl<sup>−</sup>, Br<sup>−</sup>/Cl<sup>−</sup>, and F<sup>−</sup>/Cl<sup>−</sup>) as well. Furthermore, the influence of alkyl side chain length on the membranes’ ion flux and permselectivity in electrodialysis was investigated, which may be attributed to the alterations in ion channels and hydrophobic regions of the membranes. This work provides an effective strategy for the development of monovalent anion permselective membranes. |
| first_indexed | 2024-03-11T08:26:45Z |
| format | Article |
| id | doaj.art-ec28abb4dcce4790aca6d0f6b4ad7403 |
| institution | Directory Open Access Journal |
| issn | 2077-0375 |
| language | English |
| last_indexed | 2024-03-11T08:26:45Z |
| publishDate | 2023-02-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Membranes |
| spelling | doaj.art-ec28abb4dcce4790aca6d0f6b4ad74032023-11-16T22:02:32ZengMDPI AGMembranes2077-03752023-02-0113218810.3390/membranes13020188Poly(alkyl-biphenyl pyridinium)-Based Anion Exchange Membranes with Alkyl Side Chains Enable High Anion Permselectivity and Monovalent Ion FluxJin Yang0Qian Chen1Noor Ul Afsar2Liang Ge3Tongwen Xu4Anhui Provincial Engineering Laboratory of Functional Membrane Materials and Technology, Department of Applied Chemistry, School of Chemistry and Materials Science, University of Science and Technology of China, Hefei 230026, ChinaAnhui Provincial Engineering Laboratory of Functional Membrane Materials and Technology, Department of Applied Chemistry, School of Chemistry and Materials Science, University of Science and Technology of China, Hefei 230026, ChinaAnhui Provincial Engineering Laboratory of Functional Membrane Materials and Technology, Department of Applied Chemistry, School of Chemistry and Materials Science, University of Science and Technology of China, Hefei 230026, ChinaAnhui Provincial Engineering Laboratory of Functional Membrane Materials and Technology, Department of Applied Chemistry, School of Chemistry and Materials Science, University of Science and Technology of China, Hefei 230026, ChinaAnhui Provincial Engineering Laboratory of Functional Membrane Materials and Technology, Department of Applied Chemistry, School of Chemistry and Materials Science, University of Science and Technology of China, Hefei 230026, ChinaPoly(alkyl-biphenyl pyridinium)-based anion exchange membranes with alkyl side chains were synthesized for permselective anion separation. By altering the length of the grafted side chain, the hydrophilicity and other attributes of the membranes could be controlled. The QDPAB-C5 membrane with the best comprehensive performance exhibited a Cl<sup>−</sup> ion flux of 3.72 mol m<sup>−2</sup> h<sup>−1</sup> and a Cl<sup>−</sup>/SO<sub>4</sub><sup>2−</sup> permselectivity of 15, which are significantly better than the commercial Neosepta ACS membrane. The QDPAB-C5 membranes with distinct microscopic phase separation structures formed interconnected hydrophilic/hydrophobic ion channels and exhibited excellent ion flux and permselectivity for other anionic systems (NO<sub>3</sub><sup>−</sup>/SO<sub>4</sub><sup>2−</sup>, Br<sup>−</sup>/SO<sub>4</sub><sup>2−</sup>, F<sup>−</sup>/SO<sub>4</sub><sup>2−</sup>, NO<sub>3</sub><sup>−</sup>/Cl<sup>−</sup>, Br<sup>−</sup>/Cl<sup>−</sup>, and F<sup>−</sup>/Cl<sup>−</sup>) as well. Furthermore, the influence of alkyl side chain length on the membranes’ ion flux and permselectivity in electrodialysis was investigated, which may be attributed to the alterations in ion channels and hydrophobic regions of the membranes. This work provides an effective strategy for the development of monovalent anion permselective membranes.https://www.mdpi.com/2077-0375/13/2/188anion exchange membranemonovalent anion permselective membranehydrophobicityelectrodialysispermselectivity |
| spellingShingle | Jin Yang Qian Chen Noor Ul Afsar Liang Ge Tongwen Xu Poly(alkyl-biphenyl pyridinium)-Based Anion Exchange Membranes with Alkyl Side Chains Enable High Anion Permselectivity and Monovalent Ion Flux Membranes anion exchange membrane monovalent anion permselective membrane hydrophobicity electrodialysis permselectivity |
| title | Poly(alkyl-biphenyl pyridinium)-Based Anion Exchange Membranes with Alkyl Side Chains Enable High Anion Permselectivity and Monovalent Ion Flux |
| title_full | Poly(alkyl-biphenyl pyridinium)-Based Anion Exchange Membranes with Alkyl Side Chains Enable High Anion Permselectivity and Monovalent Ion Flux |
| title_fullStr | Poly(alkyl-biphenyl pyridinium)-Based Anion Exchange Membranes with Alkyl Side Chains Enable High Anion Permselectivity and Monovalent Ion Flux |
| title_full_unstemmed | Poly(alkyl-biphenyl pyridinium)-Based Anion Exchange Membranes with Alkyl Side Chains Enable High Anion Permselectivity and Monovalent Ion Flux |
| title_short | Poly(alkyl-biphenyl pyridinium)-Based Anion Exchange Membranes with Alkyl Side Chains Enable High Anion Permselectivity and Monovalent Ion Flux |
| title_sort | poly alkyl biphenyl pyridinium based anion exchange membranes with alkyl side chains enable high anion permselectivity and monovalent ion flux |
| topic | anion exchange membrane monovalent anion permselective membrane hydrophobicity electrodialysis permselectivity |
| url | https://www.mdpi.com/2077-0375/13/2/188 |
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