Modification of polyamide TFC nanofiltration membrane for improving separation and antifouling properties.
Modification of polyamide TFC nanofiltration membrane for improving separation and antifouling properties.
复制标题
聚酰胺TFC纳滤膜的改性提高分离性能和防污性能
DOI：
10.1039/c8ra01374h
复制
发表时间：
2018-04-18
期刊：
影响因子：
3.9
通讯作者：
Gao, Cong-Jie
中科院分区：
文献类型：
--
作者：
Liu, Li-Fen;Huang, Xiang;Zhang, Xiao;Li, Ke;Ji, Yan-Li;Yu, Chun-yang;Gao, Cong-Jie
本文提出以树枝状大分子三甲基酰胺胺(TMAAM)单体作为关键功能单体对传统的芳香族聚酰胺薄膜复合纳滤膜(TFC)进行改性，通过界面聚合制备了一种新型的TMAAM基半芳香族聚酰胺复合纳滤膜。系统研究了PIP/TMAAM比例(PIP=哌嗪)对膜的化学结构、表面性质和分离性能的影响。随着膜中TMAAM负荷量的增加，膜的水通量显著增加，但截盐率仅略有下降。当PIP/TMAAM的摩尔比为1时，膜的表面更加光滑，亲水性更强，对不同价态的盐表现出最佳的分离性能。此外，TMAAM改性的TFC膜对带负电荷的染料分子具有极高的截留率，对单价盐具有很高的渗透率，具有良好的染料/盐分离应用前景。此外，TMAAM基膜在长期运行过程中水通量和盐截留率稳定，具有良好的抗污染性能和高效的清洗恢复能力。因此，本工作提供了一种新型的半芳香族聚酰胺复合纳滤膜，它是一种简单、直接的界面聚合方法，具有高亲水性、良好的稳定性和较强的抗污染性能。
In this work, a dendrimer trimesoyl amide amine (TMAAM) monomer was proposed to be used as a key functional monomer to modify the conventional aromatic polyamide thin-film composite (TFC) nanofiltration (NF) membrane, and a new kind of TMAAM-based semi-aromatic polyamide composite NF membrane was thus prepared by interfacial polymerization. The effects of the PIP/TMAAM ratio (PIP = piperazine) on the membrane chemical structure, surface properties and separation performances were investigated systematically. With the increase in TMAAM content loaded in the membrane, the water flux strongly increased but the salt rejection decreased only slightly. When the PIP/TMAAM ratio was 1, the membrane NF-2 exhibited a smoother and more hydrophilic surface, as a result of which it displayed an optimum separation performance for different valent salts. In addition, the TMAAM modified TFC membrane presented an extremely high rejection to negatively charged dye molecules and high permeation for monovalent salts, leading to good prospects for dye/salt separation application. Moreover, both the water flux and salt rejection of the TMAAM-based membrane were stable in a long-term running process, and the membrane showed a favourable anti-fouling property and efficient cleaning recovery. Therefore, this work provides a new type of semi-aromatic polyamide composite NF membrane fabricated by a facile and straightforward method via interfacial polymerization with high hydrophilicity, good stability and strong anti-fouling property.
登录
查看更多内容
影响因子：
9.9
作者：
Sayed, S.;Tarek, S.;Moerman, C.
通讯作者：
Moerman, C.
影响因子：
4.6
作者：
Paul, Mou;Jons, Steven D.
通讯作者：
Jons, Steven D.
影响因子：
10.9
作者：
Chen, Long;Moon, Jung-Hyeon;Ci, Lijie
通讯作者：
Ci, Lijie
影响因子：
9.9
作者：
Chen, Pengli;Ma, Xiao;Fan, Yiqun
通讯作者：
Fan, Yiqun
影响因子：
9.5
作者：
Lee, Kah P.;Bargeman, Gerrald;Benes, Nieck E.
通讯作者：
Benes, Nieck E.