期刊
JOURNAL OF MEMBRANE SCIENCE
卷 636, 期 -, 页码 -出版社
ELSEVIER
DOI: 10.1016/j.memsci.2021.119581
关键词
PIM-1; Mixed-matrix membranes; MOF-801; Ionic liquid; CO2 separation
资金
- National Natural Science Foundation of China [22075031, 51603017]
- Jilin Provincial Science & Technology Department [s 20200801011 GH]
By incorporating MOF-801/ionic liquid nanocomposites into PIM-based mixed matrix membranes, the CO2 separation performance can be significantly enhanced, with improved gas adsorption and diffusion due to optimized porous structure and exposed active sites, showing excellent gas separation performance and working stability exceeding the 2008 Robeson upper bound.
In this work, we fabricated PIM-based mixed matrix membranes (MMMs) containing MOF-801/ionic liquid nanocomposites to enhance CO2 separation performance of pure polymer membranes. All membranes and MOF801/ionic liquid nanocomposites were prepared by solution casting method and wet impregnation, respectively. The samples were analyzed by SEM, XRD, FTIR, TGA and Nitrogen adsorption-desorption measurements. The nanocomposites are composed of metal-organic framework (MOF) MOF-801 and ionic liquid (IL) adsorption capacity. MOF-801 can well control the dispersion of IL in the polymer matrix, which is conducive to exposing more active sites in the nanocomposites to improve the CO2 adsorption selectivity of MOF-801/ionic liquid nanocomposites. At the same time, the porous structure of nanocomposites also enhances the gas adsorption and diffusion, thereby improving the gas separation performance. Compared with pure PIM-1 membranes, the CO2 permeability and CO2/N2 selectivity of IL@MOF/PIM-5% MMMs was increased by 129% and 45% (CO2 = 9420 Barrer, CO2/N2 = 29), respectively. Compared with MOF-801/PIM-1 MMMs, the permeability of CO2 decreased slightly but the selectivity of CO2/N2 increased from 27 to 29. The aging test showed that the CO2 permeability of MMMs could remain above 70% after 90 days. The anti-plasticization performance of MMMs has also been significantly improved. The CO2 separation performance of IL@MOF/PIM-5% MMMs significantly exceeded the 2008 Robeson upper bound, showing excellent gas separation performance and working stability.
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