期刊
JOURNAL OF MEMBRANE SCIENCE
卷 520, 期 -, 页码 262-271出版社
ELSEVIER
DOI: 10.1016/j.memsci.2016.07.026
关键词
Electrodialysis; Anion exchange membrane; Electro-deposition; Monovalent anion permselectivity; Polystyrene sulfonate
资金
- National High Technology Research and Development Program 863 [2015AA030502]
- Public Welfare Project of the Science and Technology Committee of Zhejiang Province [201301038]
- Natural Science Foundation of Zhejiang Province [Y168060039]
A novel anion exchange membrane (AEM) is developed through poly (sodium 4-styrene sulfonate) (PSS) and hydroxypropyltrimethyl ammonium chloride chitosan (HACC) alternate electro-deposition to enhance the monovalent selectivity. Compared to the commercial original AEM, coating of the (PSS/HACC)(N) alternate electro-deposition multilayer on the membrane surface dramatically enhance the selectivity of anions. In addition, the permselectivity for monovalent anions of the membranes was investigated by electrodialysis experiments. For comparison, the corresponding Cl-/SO42- were chosen and the average values of permselectivity and separation efficiency of commercial AEM are 0.66 and -0.19 respectively. As result of alternate electro-deposition of PSS/HACC layers, the permselectivity raised up to 2.90 and the separation efficiency also increased up to 0.28 for nine PSS/HACC bilayers needed. Under the optimal fabricating conditions, the area resistance of membrane arrived at 4.52 Omega cm(2) with nine PSS/HACC bilayers. Meanwhile, the polarization current-voltage curves and zeta-potential of membranes were also tested to characterize the electrochemical behavior of the modified membrane. The high selectivities of these membranes may enable electrodialysis applications in separation of monovalent and divalent anions. (C) 2016 Elsevier B.V. All rights reserved.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据