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Autoren:
Thür, Raymond; Velthoven, Niels Van; Slootmaekers, Sam; Didden, Jeroen; Verbeke, Rhea; Smolders, Simon; Dickmann, Marcel; Egger, Werner; Vos, Dirk De; Vankelecom, Ivo F. J. 
Dokumenttyp:
Zeitschriftenartikel / Journal Article 
Titel:
Bipyridine-based UiO-67 as novel filler in mixed-matrix membranes for CO2-selective gas separation 
Zeitschrift:
Journal of Membrane Science 
Jahrgang:
576 
Jahr:
2019 
Seiten von - bis:
78-87 
Sprache:
Englisch 
Stichwörter:
CO2/CH4 gas separation; Bipyridine based UiO-67; Mixed-matrix membranes; Zirconium metal-organic frameworks 
Abstract:
Bipyridine-based UiO-67 Metal-Organic Frameworks (MOFs) are for the first time successfully applied as filler material in Matrimid mixed-matrix membranes (MMMs). Extensive characterization of fillers (via XRD, NMR, SEM, ATR-FTIR, CO2 and N2 physisorption) and membranes (via XRD, SEM, ATR-FTIR, DSC, TGA and PALS) were performed to gain insight in the MMM separation behavior. Lewis basic sites in the MMMs function as CO2-carriers, doubling CO2/CH4 selectivity (from 38 for pristine Matrimid to 75 for the MMM with 10 wt% UiO-67-33), while the CO2 permeability was simultaneously improved from 16 Barrer (Matrimid) up till 26 Barrer for the MMM with 10 wt% UiO-67-33 (+63%). Gas permeation experiments suggested a facilitated transport mechanism to be responsible for these high mixed-gas selectivities. The concentration of the filler inside the membrane could be increased to 30 wt%, resulting in a permeability increase of 350% without losing selectivity compared to the Matrimid membrane. Use of N-heterocyclic ligands proved to be an interesting strategy and good alternative for functionalization of MOF surfaces to obtain improved membrane performance. 
ISSN:
0376-7388 
Fakultät:
Fakultät für Luft- und Raumfahrttechnik 
Institut:
LRT 2 - Institut für Angewandte Physik und Messtechnik 
Professur:
Dollinger, Günther 
Open Access ja oder nein?:
Nein / No