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一种表面荷正电纳滤膜的制备与性能研究

Preparation and Performance of A Positively Charged Nanofiltration Membrane
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摘要 以三(2-氨基乙基)胺为水相单体、均苯三甲酰氯为有机相单体,在聚醚砜超滤基膜上运用界面聚合的方法,制备复合纳滤膜。膜表面XPS和红外的分析表明了聚合反应的发生。复合膜性能测试显示最佳制备条件为三(2-氨基乙基)胺的质量分数为1.5%、均苯三甲酰氯的质量分数为0.1%,界面聚合反应时间为60s。复合纳滤膜表面等电点为pH=8,在中性、酸性溶液中膜表面呈正电性。复合膜在0.6Mpa下水通量约9.5L/(m^(2)·h),对盐的截留情况为:Na_(2)SO_(4)(95.54%)>MgSO_(4)(91.5%)>MgCl_(2)(90.57%)>Na为Cl(69.05%)。 A positively charged composite nanofiltration membrane was formed though interfacial polymerization on the surface of the polyethersulfone ultrafiltration membrane substrate with tris(2-aminoethyl)amine and(TMC) as the monomers in aqueous and organic phases,respectively.XPS and IR analysis of the membrane surface indicated the occurrence of polymerization.The performance test of the composite membrane showed that the prepared conditions should be controlled as tris(2-aminoethyl)amine concentration 1.5%(wt.),TMC 0.1%(wt.) and the interfacial polymerization time nearly 60 s.The isoelectric point(IEP) of the composite nanofiltration membrane surface at pH about 8.0,so the surface charge is positive in neutral and acidic solutions.The water permeability of about 9.5 L/(m2.h) at the pressure of 0.6 MPa,and the order of salts rejection rate is Na_(2)SO_(4)(95.54%)>MgSO_(4)(91.5%) >MgCl_(2)(90.57%)>NaCl(69.05%).
作者 苏光 苏文静 程明星 张倩 李峰辉 SU Guang;SU Wenjing;CHENG Mingxing;ZHANG Qian;LI Fenghui(College of Materials Science and Engineering,Henan Institute of Technology,Xinxiang 453003,China)
出处 《河南工学院学报》 CAS 2021年第5期25-29,共5页 Journal of Henan Institute of Technology
基金 河南省自然科学青年基金(212300410130) 河南省科技厅科技攻关项目(202102310549,192102310499) 河南省教育厅高等学校重点项目(20B150004,19B450001)。
关键词 三(2-氨基乙基)胺 纳滤 复合膜 界面聚合 tri(2-aminoethyl)amine nanofiltration composite membrane interfacial polymerization
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