Improved performance of composite nanofiltration membranes by adding calcium chloride in aqueous phase during interfacial polymerization process

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• 作者：Xiaochen Fan ; Yanan Dong ; Yanlei Su ; Xueting Zhao ; Yafei Li ; Jiazhen Liu ; Zhongyi Jiang
• 关键词：Interfacial polymerization ; Calcium chloride ; Nanofiltration ; Separation performance ; Chlorine resistance
• 刊名：Journal of Membrane Science
• 出版年：15 February, 2014
• 年：2014
• 卷：452
• 期：Complete
• 页码：90-96
• 全文大小：713 K

文摘

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Abstracts

The composite nanofiltration membranes were prepared via interfacial polymerization of tetraethylenepentamine (TEPA) and 1,3,5-benzenetricarbonyl trichloride (TMC). The improved performance of the composite nanofiltratiom membranes by adding calcium chloride in aqueous phase during the interfacial polymerization was verified in terms of pure water permeability, rejection of different solutes including dyes and inorganic salts and chlorine resistance. The results showed that the pure water permeability of composite nanofiltration membranes would acquire a remarkable increase with a slight decrease in solute rejections under the optimized addition of CaCl₂. The addition of CaCl₂ also dramatically enhanced the chloride resistance of composite nanofiltration membranes in comparison with the control membranes prepared without CaCl₂ added. Therefore, inorganic salts like CaCl₂ could be considered as a potential additive to enhance the performance of composite nanofiltration membranes.