Ultem®/ZIF-8 mixed matrix hollow fiber membranes for CO2/N2 separations

• Published in: Journal of membrane science Vol. 401-402; pp. 76 - 82
• Main Authors: Dai, Ying, Johnson, J.R., Karvan, Oğuz, Sholl, David S., Koros, W.J.
• Format: Journal Article
• Language: English
• Published: Amsterdam Elsevier B.V 01.05.2012; Elsevier
• Subjects: artificial membranes; carbon dioxide; Chemistry; CO2/N2 separation; Colloidal state and disperse state; Exact sciences and technology; Flue gas; General and physical chemistry; Hollow fibers; Membranes; Mixed matrix membranes; MOF; nitrogen; polymers; temperature; ZIF; CO2/N2 separation; Hollow fibers; MOF; ZIF; Flue gas; Mixed matrix membranes; Metal organic framework; Separation; Film; Hybrid material; Method; CO; Pressure; Composite material; N; Test; Hollow fiber; Asymmetric membrane; Production; Jet; Membrane; Performance
• ISSN: 0376-7388; 1873-3123
• DOI: 10.1016/j.memsci.2012.01.044

► Formation of mixed matrix hollow fiber membranes containing metal organic framework (MOF) fillers. ► Incorporation of a MOF sub-class, zeolitic imidazolate framework (ZIF) fillers, into polymer matrices. ► Improved separation performance compared to pure polymer membranes for CO2/N2 separations. ► Platform development for future polymer/MOF mixed matrix membranes. Organic–inorganic hybrid (mixed matrix) membranes can potentially extend the separation performance of traditional polymeric materials while maintaining processing convenience. Although many dense films studies have been reported, there have been few reported cases of these materials being successfully extended to asymmetric hollow fibers. In this work we report the first successful production of mixed matrix asymmetric hollow fiber membranes containing metal-organic-framework (MOF) ZIF-8 fillers. Specifically, we have incorporated ZIF-8 into a polyetherimide (Ultem® 1000) matrix and produced dual-layer asymmetric hollow fiber membranes via the dry jet-wet quench method. The outer separating layer of these composite fibers contains 13wt% (17vol%) of ZIF-8 filler. These membranes have been tested over a range of temperatures and pressures for a variety of gas pairs. An increase in separation performance for the CO2/N2 gas pairs was observed for both pure gas and mixed gas feeds.