聚酰胺
纳滤
膜
渗透
化学工程
单宁酸
材料科学
纳米颗粒
纳米复合材料
界面聚合
咪唑酯
沸石咪唑盐骨架
化学
纳米技术
高分子化学
复合材料
吸附
聚合物
有机化学
工程类
单体
金属有机骨架
生物化学
渗透
作者
Mengjiao Xia,Wentian Zhang,Yanchao Xu,Hongjun Lin,Yang Jiao,Liguo Shen,Renjie Li,Meijia Zhang,Huachang Hong
出处
期刊:Desalination
[Elsevier]
日期:2022-11-01
卷期号:541: 116042-116042
被引量:26
标识
DOI:10.1016/j.desal.2022.116042
摘要
Polyamide nanofiltration membranes with an interlayer of either a plant polyphenol tannic acid (TA) coating to improve polyamide formation or zeolitic imidazolate framework-8 (ZIF-8) nanoparticles (NPs) as a sacrificial template have been recently attracting great interest, although none has reported such a dual-functional interlayer. In this study, we demonstrated a facile and controllable one-pot synthesis of novel [email protected] core-shell NPs. Mixing Zn2+, Hmim, and TA in an aqueous solution could readily give rise to these NPs. Microscopy characterizations showed that composition and morphology of NPs could be easily controlled by the amount of TA used. Comparing with the thin film nanocomposite (TFN) membrane prepared with ZIF-8 NPs as an interlayer, which had significant defects in its polyamide layer due to the aggregation of hydrophobic ZIF-8 NPs, the homogeneous and hydrophilic [email protected] NPs interlayered TFN membranes demonstrated intact polyamide layers. It was found that when 0.5 mg [email protected] NPs were used, the obtained TFN membrane showed a high water permeance of 20.7 L m−2 h−1 bar−1 and Na2SO4 rejection of 96.6 %, typically outperforming other interlayer-based PA membranes reported elsewhere. This work provided not only a novel interlayer material but also deep insights into design of high-performance polyamide membranes.
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