期刊
JOURNAL OF MEMBRANE SCIENCE
卷 572, 期 -, 页码 520-531出版社
ELSEVIER
DOI: 10.1016/j.memsci.2018.11.005
关键词
Covalent organic frameworks (COFs); Organic solvent nanofiltration (OSN); Thin film nanocomposite (TFN); Interfacial polymerization (IP)
资金
- National Natural Science Foundation of China [21476218]
- Fundamental Research Funds for the Central Universities of China [201822012]
- U.S. Department of Energy, Bioenergy Technologies Office [WBS 2.5.5.507]
This paper reports a new class of thin film nanocomposite (TFN) membranes incorporated with covalent organic frameworks (COFs) nanoparticles in the polyamide skin layer and having enhanced solvent (ethanol) permeation flux and high solute rejection for organic solvent nanofiltration (OSN). These OSN membranes were prepared via interfacial polymerization of m-phenylenediamine (MPD) and trimesoyl chloride with the presence of COFs nanoparticles in the MPD aqueous solution, followed by chemical crosslinking and solvent activation. The prepared TFN membranes exhibited an improved surface hydrophilicity and a decreased skin layer thickness, which leading to a 46.7% increment in the ethanol permeance (up to 79.8 Lm(-2) h(-1) MPa-1) compared to those COFs-free membranes, as well as an increased Rhodamine B (479 Da) rejection (up to 99.4%). Moreover, our prepared TFN OSN membranes exhibited an excellent solvent resistance after being statically immersed in N, N-dimethylformamide (DMF) at ambient temperature over 100 days, and after being consecutively cross-flow filtrated using Rose Bengal/DMF solution at ambient temperature over 7 days, both with no significant changes in the separation performance. Furthermore, they showed only minor decrease in flux and rejection after being statically immersed in DMF at 80 degrees C over 14 days, which provides a strong potential in OSN applications.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据