【摘要】 主要研究以聚乙烯亚胺(PEI)和均苯三甲酰氯(TMC)为反应单体,采用界面聚合法来制备荷正电纳滤膜。通过均匀实验设计,得出的优化条件为:PEI浓度为1.75%,十二烷基硫酸钠(SDS)浓度为0.1%,酸接受剂(Na2CO3∶NaOH=2∶1)浓度为0.3%(均为质量浓度),界面聚合反应时间(IPT)为2 m in,膜对一价盐的截留率均在30%左右,对二价盐的截留率接近70%,对低分子有机染料的截留率达90%以上。更多还原

【Abstract】 A positively charged nanofiltration(NF) membrane is prepared by interfacial polymerization method,with polyethylenimine(PEI) and trimesoyl chloride(TMC) as reaction monomers.From uniform experimental design,the optimization condition is obtained that the feasible concentration of PEI is 1.75%(wt);the concentration of SDS is 0.1%(wt);the concentration of acid accepters(Na) is 0.3%(wt)and reaction time is 2 min.The retention of this membrane to CaCl2 and MgCl2 is about 70% and the retention to NaCl and KCl is about 30%.Moreover,the retention of this membrane to dyes with small molecule weight is more than 90%.更多还原