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.通过傅里叶红外光谱、X光电子能谱、扫描电镜、原子力显微镜、膜表面Zeta电位、水接触角、脱盐率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.
作者
侯斌
赵晨辉
张健
苏婉
张文娟
程方
常高峰
张宇峰
HOU Bin;ZHAO Chenhui;ZHANG Jian;SU Wan;ZHANG Wenjuan;CHENG Fang;CHANG Gaofeng;ZHANG Yufeng(Tianjin Key Laboratory of Water Quality Science and Technology,Tianjin Chengjian University,Tianjin 300384,China;State Key Laboratory of Membrane Separation and Membrane Process,Tiangong University,Tianjin 300387,China;Tianjin Academy of Eco-Environmental Sciences,Tianjin 300191,China)
出处
《膜科学与技术》
CAS
CSCD
北大核心
2022年第3期91-96,105,共7页
Membrane Science and Technology
基金
国家科技重大专项课题(2017ZX07107-001-003)
国家重点研发计划(2017YFE0114200)
天津市科技重大专项与工程计划(17ZXSTSF00040)。
关键词
纳滤
磺化多巴胺
聚乙烯亚胺
共沉积
nanofiltration
sulfonated dopamine
polyethylene imine
co-deposition
