Preparation of Antifouling Nanofiltration Membrane via Interfacial Polymerization of Fluorinated Polyamine and Trimesoyl Chloride

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• 作者：Yafei Li ; Yanlei Su ; Xueting Zhao ; Runnan Zhang ; Yanan Liu ; Xiaochen Fan ; Junao Zhu ; Yanyan Ma ; Yuan Liu ; Zhongyi Jiang
• 刊名：Industrial & Engineering Chemistry Research
• 出版年：2015
• 出版时间：August 26, 2015
• 年：2015
• 卷：54
• 期：33
• 页码：8302-8310
• 全文大小：539K
• ISSN：1520-5045

文摘

A novel fluorinated amine monomer (CF₃(CF₂)₆CONH(CH₂CH₂NH)₂CH₂CH₂NH₂, fluorinated polyamine) was synthesized and utilized to perform interfacial polymerization with trimesoyl chloride, producing thin-film composite nanofiltration membranes with low surface free energy. Filtration experiments were performed using simulated brackish water (1.0 g/L of salt) and simulated dye wastewater (0.1 g/L of dyes). The membrane prepared under optimal conditions exhibited a flux of 12.9 L/(m² h), while the rejection of Orange GII reached 94.7% under 0.2 MPa. The antifouling experiment results verified that the resultant membrane (surface free energy as low as 23.0 mJ/m²) could effectively resist and drive off foulants such as bovine serum albumin, humic acid, and oil due to the lower adhesion force between foulants and membrane. The excellent antifouling property of the resultant membrane (minimal value of total flux decline ratio 鈭?.1%, maximum value of flux recovery ratio 99.8%) would promote the application of nanofiltration in wastewater treatment.