膜科学与技术

磺化多巴胺-聚乙烯亚胺共沉积制备聚砜基复合纳滤膜的研究

作者：侯斌，赵晨辉，张健，苏婉，张文娟，程方，常高峰，张宇峰

单位： 1.天津城建大学水质科学与技术天津市重点实验室，天津300384； 2. 天津工业大学省部共建分离膜与膜过程国家重点实验室，天津300387； 3. 天津市生态环境科学研究院，天津300191

关键词：纳滤；磺化多巴胺；聚乙烯亚胺；共沉积

出版年,卷(期):页码： 2022,42(3):91-96

摘要：

先将聚多巴胺（PDA）磺化，再将磺化多巴胺（SDA）与聚乙烯亚胺（PEI）一起溶解于Tris缓冲液中，最后在聚砜（PSf）基膜上进行共沉积获得SDA-PEI/PSf复合纳滤膜。通过傅利叶红外光谱、X光电子能谱XPS、扫描电镜、原子力显微镜、膜表面Zeta电位、水接触角、水脱盐等表征膜结构与性能。结果表明，其对硫酸镁的脱盐率随着沉积时间延长和SDA的浓度增加而增加；SDA-PEI的共沉积层均匀附着在膜表面，膜表面电负性亦随SDA增加而增强。

Firstly, polydopamine (PDA) was sulfonated, then sulfonated dopamine (SDA) and polyethylene imine (PEI) were dissolved in Tris buffer, and finally, SDA-PEI/PSf composite nanofiltration membranes were obtained by co-deposition on the polysulfone (PSf) substrate membrane. The structure and properties of the membrane were characterized by Fourier transform infrared spectroscopy, scanning electron microscopy, atomic force microscopy, X-ray photoelectron spectroscopy, zeta potential on the membrane surface, water contact Angle, and water desalination. The results show that the desalting rate of magnesium sulfate increases with the increase of deposition time and SDA concentration. The co-deposition layer of SDA-PEI was uniformly attached to the membrane surface, and the electronegativity of the membrane surface increased with the increase of SDA.

侯斌（1996-），男，山西吕梁人，从事膜改性与水处理技术的方向研究

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