期刊
JOURNAL OF MEMBRANE SCIENCE
卷 467, 期 -, 页码 67-72出版社
ELSEVIER SCIENCE BV
DOI: 10.1016/j.memsci.2014.05.014
关键词
Mixed-matrix membranes; Metal-organic framework; CO2 separation; Polyoxazoline
资金
- Korea Center for Artificial Photosynthesis (KCAP) - Ministry of Education, Republic of Korea through the National Research Foundation of Korea [2012M1A2A2671781]
- Energy Efficiency & Resources Core Technology Program of the Korea Institute of Energy Technology Evaluation and Planning (KETEP) grant from the Ministry of Trade, Industry and Energy, Republic of Korea [20130389]
- National Research Foundation of Korea [2012M1A2A2671781] Funding Source: Korea Institute of Science & Technology Information (KISTI), National Science & Technology Information Service (NTIS)
We examined the challenge of preparing CO2-selective bifunctional three-dimensional Cu-metal-organic frameworks (Cu-MOFs) for use in mixed-matrix membranes (MMMs) fabricated on an asymmetric polymer support. Two different gas-selective micro-sized frameworks, [{Cu-2(Glu)(2)(mu-bPa)}center dot(CH3CN)](n) (Cu-MOF1) and [{Cu-2(Glu)(2)(mu-bPP)}center dot(C3H6O)](n) (Cu-MOF2) (Glu = glutarate, bpa=1,2-bis(4-pyridyl) ethane, bpp=1,3-bis(4-pyridyl)propane), were synthesised and dispersed in polyoxazoline (POZ), as a matrix for the fabrication of the MMMs. SEM imaging indicated relatively good adhesion between the Cu-MOFs and POZ, without any surface treatment. The ideal selectivity of CO2/N-2 was enhanced significantly in the Cu-MOF/POZ MMM, compared to that in a pristine POZ asymmetric membrane. Improvement in the CO2/N-2 selectivity of the membranes was achieved via both high adsorption selectivity of CO2 over N-2 by the Cu-MOFs, and the difference in pore sizes. The fabrication methods that use gas-selective MOFs may create new opportunities for gas-selective MOF/polymer combinations for MMMs with useful properties for large volume separations. (C) 2014 Elsevier B.V. All rights reserved.
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