TA对基于DA/PEI的PVDF复合疏松纳滤膜的结构与性能影响的研究  

Study on the effect of TA on the structure and properties of DA/PEI-based PVDF composite loose nanofiltration membranes

作　　者：张琪 陈淑怡 张晨[1] 蒋淑红 陈红[1] 王军[1] ZHANG Qi;CHEN Shu-yi;ZHANG Chen;JIANG Shu-hong;CHEN Hong;WANG Jun(College of Environmental Science and Engineering,Donghua University,Shanghai 201620,China;National Engineering Center for Shanghai Urban Water Resources Development and Utilization Co.,Ltd.,Shanghai 200000,China)

机构地区：[1]东华大学环境科学与工程学院,上海201620 [2]上海城市水资源开发利用国家工程中心有限公司,上海200000

出　　处：《现代化工》2024年第7期116-123,共8页Modern Chemical Industry

基　　金：国家自然科学基金面上项目(52070040);中国博士后科学基金资助项目(2023M732171);上海市“超级博士后”资助项目(2022243)。

摘　　要：为了对染料废水中染料和盐进行有效地分离与回收,以聚偏氟乙烯(PVDF)超滤膜为基膜,以多巴胺(DA)、单宁酸(TA)及聚乙烯亚胺(PEI)为共沉积物,以均苯三甲酰氯(TMC)为有机相,采用界面聚合法制备了PVDF复合疏松纳滤膜,探讨了DA与TA及PEI与TA的质量浓度比对PVDF复合疏松纳滤膜结构与性能及处理模拟RB5染料废水效果的影响。结果表明,当ρ(DA)/ρ(TA)与ρ(PEI)/ρ(TA)分别为2/8和4/6时,膜性能最佳,此时纯水通量较不添加TA时分别提高36%和114%;模拟RB5染料废水通量较不添加TA时分别提高37%和87%;染料截留率分别为95.5%、95.4%,盐(NaCl)的截留率分别为3.95%、3.15%。PVDF复合疏松纳滤膜在处理模拟RB5染料废水中运行稳定性良好。In order to effectively separate and recover dyes and salts from dye-containing wastewater,PVDF composite loose nanofiltration membrane is prepared via interfacial polymerization method with polyvinylidene fluoride(PVDF)ultrafiltration membrane as the matrix membrane,dopamine(DA),tannic acid(TA)and polyethyleneimine(PEI)as the co-deposit substances,and trimesoyl chloride(TMC)as the organic phase.The influences of the mass concentration ratios of DA to TA and PEI to TA on the structure and performance of PVDF composite loose nanofiltration membrane and the effect of treating simulated RB5 dye-containing wastewater by the membrane are evaluated.The membrane shows the best performance whenρ(DA)/ρ(TA)andρ(PEI)/ρ(TA)are 2/8 and 4/6,respectively,over which the pure water flux is 36%and 113%,respectively higher than that over the membrane without TA.The flux of the simulated RB5 dye-containing wastewater is also 37%and 87%,respectively higher.The retention rates of dye are 95.5%and 95.4%,respectively,and those of salt(NaCl)are 3.95%and 3.15%,respectively.It is identified that PVDF composite loose nanofiltration membrane has good stability in the treatment of simulated RB5 dye-containing wastewater.

关 键 词：多巴胺 单宁酸 聚乙烯亚胺 PVDF复合疏松纳滤膜 染料/盐 

分 类 号：X703[环境科学与工程—环境工程]