摘要
以不同分子量的聚乙烯亚胺(PEI)和小分子二元胺作为交联剂,对聚酰亚胺(PI)中空纤维膜进行化学交联来制备耐溶剂纳滤膜.考察了PEI分子量和交联时间对膜分离性能的影响.结果表明,膜分离性能随PEI分子量的增加变差,随交联时间的增加变好.用PEI600作为交联剂,交联时间为4h时,膜的纯水通量为8.3L/(m^2·h·MPa),对PEG1000的截留率为97.0%.3种小分子交联剂中,用乙二胺交联膜的分离性能较好,纯水通量为25.8L/(m^2·h·MPa),对PEG1000的截留率为82.6%.纳滤膜对药物三七总皂苷体系有良好的分离性能.
Polyimide hollow fiber membranes have been chemically crosslinked by polyethyleneimine(PEI)with different molecular weights and small molecule diamines in order to prepare nanofiltration(NF)membranes.The effects of the molecular weight of PEI and crosslinking time on the membrane separation performance were studied.It was found that membrane separation performance deteriorated with increasing molecular weight of PEI,while it improved with increasing crosslinking time.When PEI600 was used as the crosslinking agent and the crosslinking time was 4 h,the pure water permeance(PWP)and rejection of the membrane were 8.3 L/(m^2·h·MPa)and 97.0%respectively.When the separation performance of membranes crosslinked by small molecule diamines was compared,membranes crosslinked by ethylenediamine afforded the best separation performance with PWPof 25.8 L/(m^2·h·MPa)and rejection of 82.6%.In addition,the NF membranes showed good performance in the separation of total saponins in the panax notoginseng saponins(PNS)system.
作者
董香灵
于海军
张靖昱
邹彤
金焱
王丽娜
曹义鸣
DONG Xiangling;YU Haijun;ZHANG Jingyu;ZOU Tong;JIN Yan;WANG Lina;CAO Yiming(Dalian National Laboratory for Clean Energy (DNL),Dalian Institute of Chemical Physics,Chinese Academy of Sciences,Dalian 116023,China;University of Chinese Academy of Sciences,Beijing 100049,China;Vontron Technology Co.Ltd.,Guiyang 550018,China)
出处
《膜科学与技术》
CAS
CSCD
北大核心
2018年第6期69-75,共7页
Membrane Science and Technology
基金
辽宁省自然科学基金面上项目(2015020579)
国家重点研发计划(2016YFE0118800)
关键词
聚酰亚胺
耐溶剂纳滤膜
化学交联
三七总皂苷
polyimide
solvent resistant nanofiltration (SRNF)membrane
chemical crosslinking
panax notoginseng saponins