Engineering amphiphilic nanofiltration membrane surfaces with multi-defense mechanism for improved antifouling performances
Antifouling nanofiltration (NF) membrane surfaces capable of combating membrane fouling caused by different foulants are highly desirable for their broad applications.In this study, amphiphilic NF membranes with both hydrophilic domains and low surface energy domains were prepared to optimally integrate fouling-resistant defense mechanism and fouling-release defense mechanism for enhanced antifouling performance.The construction of amphiphilic surfaces involved two-step surface modification of hydrophilic polyamide NF membrane: (1) the introduction of primary amine groups as active sites by grafting triethylenetetramine (TETA) onto the carboxyl groups of polyamide membrane;(2) the subsequent grafting of 2, 2, 3, 4, 4, 4-hexafluorobutyl methacrylate (HFBM) through Michael addition reaction.The amphiphilic membranes had better antifouling properties compared with the hydrophilic polyamide membrane during the filtration of bovine serum albumin (BSA) protein solution, humic acid solution and oil/water emulsion, which exhibited lower flux decline during utilization and higher flux recovery after water cleaning.Hopefully, this study is applicable to prepare a broad spectrum ofantifouling NF membrane.
nanofiltration membrane surface grafting Michael addition reaction antifouling amphiphilic surface
张润楠 苏延磊 姜忠义
天津大学 天津300072
国内会议
江西上饶
英文
183-188
2016-08-01（万方平台首次上网日期，不代表论文的发表时间）