氯化聚氯乙烯复合纳滤膜的制备及其在模拟RB5染料废水处理中的应用  

Preparation of CPVC composite nanofiltration membrane and its application in simulated RB5 dye wastewater treatment

作　　者：李泽辉 崔恒 王军[1] LI Zehui;CUI Heng;WANG Jun(College of Environmental Science and Engineering,Donghua University,Shanghai 201620,China)

机构地区：[1]东华大学环境科学与工程学院,上海201620

出　　处：《化工进展》2021年第S01期456-465,共10页Chemical Industry and Engineering Progress

摘　　要：以氯化聚氯乙烯(CPVC)超滤膜为基膜,采用单宁酸(TA)和哌嗪(PIP)在CPVC膜表面共沉积后与交联剂均苯三甲酰氯(TMC)进行界面聚合得到PA/TA/CPVC复合纳滤膜,采用扫描电镜(SEM)、原子力显微镜(AFM)、红外光谱及接触角对PA/TA/CPVC复合纳滤膜进行了表征,并探讨了干燥时间、TA/PIP浓度比、TA+PIP总浓度、TMC浓度对PA/TA/CPVC复合纳滤膜微观结构与性能的影响。结果表明,TA/PIP浓度比最佳为7/3,TA/PIP层的最佳干燥时间为20min,PA/TA/CPVC复合纳滤膜的纯水通量随着TA+PIP总浓度的增加和TMC浓度的增加而减少,对PEG1000的截留率均在90%以上。PA/TA/CPVC复合纳滤膜纯水通量最大值为4.5L/(m^(2)·h·bar),此时PEG1000的截留率达到95.8%。对模拟RB5染料废水的最大通量为4.3L/(m^(2)·h·bar),此时RB5的截留率为95.4%,对模拟RB5染料废水的稳定性较好。Using CPVC(chlorinated polyvinyl chloride)ultrafiltration membrane as the base membrane,after co-deposition of TA(tannic acid)and PIP(piperazine)on the surface of the CPVC membrane,interfacial polymerization is carried out with the crosslinking agent TMC(trimesoyl chloride)to obtain a PA/TA/CPVC composite nanofiltration membrane,the PA/TA/CPVC composite nanofiltration membrane was characterized by SEM,AFM,FTIR and contact angle,the effects of drying time,TA/PIP concentration ratio,TA+PIP total concentration,and TMC concentration on the microstructure and performance of PA/TA/CPVC composite nanofiltration membranes were discussed.The research results show that the best TA/PIP concentration ratio is 7/3,the best drying time of the TA/PIP layer is 20min,and the pure water flux of the PA/TA/CPVC composite nanofiltration membrane increases with the increase of TA+PIP total concentration and the concentration of TMC The rejection rate of PEG1000 is above 90%.The maximum pure water flux of PA/TA/CPVC composite nanofiltration membrane is 4.5 L/(m^(2)·h·bar),and the rejection rate of PEG1000 reaches 95.8%.The maximum flux to the simulated RB5 dye wastewater is 4.3 L/(m^(2)·h·bar),and the rejection rate of RB5 at this time is 95.4%,which shows good stability to the simulated RB5 dye wastewater.

关 键 词：氯化聚氯乙烯复合纳滤膜 单宁酸/哌嗪 共沉积和界面聚合组合法 模拟RB5染料废水 

分 类 号：X703[环境科学与工程—环境工程]