膜
分子筛
气体分离
丁烷
聚合物
材料科学
化学工程
吸附
纳米技术
化学
有机化学
复合材料
催化作用
生物化学
工程类
作者
Gongping Liu,Valeriya Chernikova,Yang Liu,Kuang Zhang,Youssef Belmabkhout,Osama Shekhah,Chen Zhang,Shouliang Yi,Mohamed Eddaoudi,William J. Koros
出处
期刊:Nature Materials
[Springer Nature]
日期:2018-02-12
卷期号:17 (3): 283-289
被引量:467
标识
DOI:10.1038/s41563-017-0013-1
摘要
Membrane-based separations can improve energy efficiency and reduce the environmental impacts associated with traditional approaches. Nevertheless, many challenges must be overcome to design membranes that can replace conventional gas separation processes. Here, we report on the incorporation of engineered submicrometre-sized metal-organic framework (MOF) crystals into polymers to form hybrid materials that successfully translate the excellent molecular sieving properties of face-centred cubic (fcu)-MOFs into the resultant membranes. We demonstrate, simultaneously, exceptionally enhanced separation performance in hybrid membranes for two challenging and economically important applications: the removal of CO2 and H2S from natural gas and the separation of butane isomers. Notably, the membrane molecular sieving properties demonstrate that the deliberately regulated and contracted MOF pore-aperture size can discriminate between molecular pairs. The improved performance results from precise control of the linkers delimiting the triangular window, which is the sole entrance to the fcu-MOF pore. This rational-design hybrid approach provides a general toolbox for enhancing the transport properties of advanced membranes bearing molecular sieve fillers with sub-nanometre-sized pore-apertures. Sub-micrometre MOF particles are incorporated into polymers to form mixed matrix membranes. Molecular sieving enables performance far beyond current limits for two applications, butane isomer separation and combined CO2/H2S removal from natural gas.
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