KMS of Research Center for Eco-Environmental Sciences， CAS
| Tuneable ion transport by electrically responsive membranes under electrical assistance | |
Xu, Lili ; Liu, Shuai; Yu, Ling; Li, Kuiling; Zhang, Yong; Wang, Jianbing; Wang, Jun
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| 2022 | |
| Source Publication | JOURNAL OF MEMBRANE SCIENCE
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| ISSN | 0376-7388 |
| Volume | 663Pages:121046-1-11 |
| Abstract | The conventional membrane technology provides an effective solution for ion separation. However, the tradi-tional membrane is not able to tune the permselectivity during operation, and has inherent drawbacks of per-meance and selectivity trade-off. In view of this, the purpose of this project is to realize controllable ion transport without impeding water filtration through electrically responsive membrane (ERMs) under electrical assistance. To achieve this, we developed electrically responsive membranes with different electrical conductivities and surface charge properties by incorporating multi-walled carbon nanotubes (CNTs) and different acids doped polyaniline (PANI). The external potential was supplied to create tuneable electrostatic interactions between surface charged ERMs and ions, which was expected to regulate and control ion transport. It was found that the developed ERMs exhibited improved rejection without decreasing the water permeance under applied potential. The responsiveness of ion rejection to the electrical potential was affected by the combined effect of charge density and electrical conductivity. The calculations based on the Derjaguin-Landau-Verwey-Overbeek (DLVO) theory suggested that imposing an external voltage increased the surface potential of ERMs and thus improved the electrostatic repulsive force between ERMs and ions, resulting in improved ion rejection. It is believed that this simple and feasible strategy for fabrication of ERMs has a potential for practical applications in tunable ion separation. |
| Department | 中国科学院饮用水科学与技术重点实验室 |
| Keyword | Tuneable ion rejection Electrically responsive membrane Electrostatic repulsion Trade-off effect Electrical assistance |
| Document Type | 期刊论文 |
| Identifier | https://ir.rcees.ac.cn/handle/311016/48579 |
| Collection | 中国科学院饮用水科学与技术重点实验室 |
| Affiliation | 1.Chinese Academy of Sciences 2.Research Center for Eco-Environmental Sciences (RCEES) 3.China University of Mining & Technology 4.Zhejiang University of Technology 5.University of Chinese Academy of Sciences, CAS |
| Recommended Citation GB/T 7714 | Xu, Lili,Liu, Shuai,Yu, Ling,et al. Tuneable ion transport by electrically responsive membranes under electrical assistance[J]. JOURNAL OF MEMBRANE SCIENCE,2022,663:121046-1-11. |
| APA | Xu, Lili.,Liu, Shuai.,Yu, Ling.,Li, Kuiling.,Zhang, Yong.,...&Wang, Jun.(2022).Tuneable ion transport by electrically responsive membranes under electrical assistance.JOURNAL OF MEMBRANE SCIENCE,663,121046-1-11. |
| MLA | Xu, Lili,et al."Tuneable ion transport by electrically responsive membranes under electrical assistance".JOURNAL OF MEMBRANE SCIENCE 663(2022):121046-1-11. |
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| Tuneable ion transpo（9288KB） | 期刊论文 | 出版稿 | 开放获取 | CC BY-NC-SA | View Download | |
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