Journal
ASIA-PACIFIC JOURNAL OF CHEMICAL ENGINEERING
Volume 12, Issue 1, Pages 110-120Publisher
WILEY
DOI: 10.1002/apj.2058
Keywords
mixed matrix membranes; ZIF-8; hydrophobic functionalization; shell ligand exchange (SLE) reaction; hydrocarbon recovery
Categories
Funding
- National Natural Science Foundation of China [21406107, 21490585, 21301148]
- Ministry of Education of China [IRT13070]
- Natural Science Foundation of Jiangsu Province [BK20140930]
- Topnotch Academic Programs Project of Jiangsu Higher Education Institutions (TAPP)
- Innovation Project of Graduate Research by Jiangsu Province [KYLX_0764]
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It is still a great challenge to prepare high performance mixed matrix membranes (MMMs) because of the difficulty in finely tuning the compatibility between filler and organic phases. In this work, ZIF-8 nanoparticles hydrophobically functionalized by 5,6-dimethylbenzimidazole (DMBIM) via shell ligand exchange (SLE) reaction were incorporated into polydimethylsiloxane (PDMS) matrix to fabricate defect-free MMMs. Organic--inorganic interface compatibility was realized because of more abundant organic ligands from DMBIM. The effects of different loadings on membrane microstructure and gas separation performance were investigated systematically. A significantly enhanced C3H8/N-2 separation performance with C3H8 permeability over 2.10 x 10(4) Barrer (91 % higher than that of pure PDMS membrane) and C3H8/N-2 selectivity of 99.5 (116 % higher than that of pure PDMS membrane) were achieved. Additionally, the as-prepared membrane also exhibited excellent stability during long term operation. (C) 2016 Curtin University of Technology and John Wiley & Sons, Ltd.
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