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Optimization analysis of polyurethane based mixed matrix gas separation membranes by incorporation of gamma-cyclodextrin metal organic frame work

Ovaid Mehmood, Sarah Farrukh, Arshad Hussain, Ayesha Rehman, Yangxian Liu, Sajid Butt, and Erum Pervaiz

Department of Chemical Engineering, School of Chemical and Materials Engineering (SCME), National University of Sciences and Technology (NUST), Islamabad, Pakistan



Received: 14 February 2020  Accepted: 28 April 2020


In this article, a polyurethane-based mixed matrix membrane employed for the separation of carbon dioxide from methane (CO2/CH4) and permeability as well as selectivities of both the gases were determined. Gamma-cyclodextrin metal–organic framework (γ-CD-MOF) was used as a filler and incorporated (0.2–1 wt%) weight percentage into the polyurethane matrix for the fabrication of dense gas separation membrane through the solution casting method. These membrane samples were undergone following characterization techniques, i.e., FTIR, SEM, XRD and UTS for qualitative analysis. Gamma-CD-MOF equipped with an ideal cavity of 17 Å diameter and an abundance of the hydroxyl group in a single molecular structure. This unique characteristic stands out Gamma-CD-MOF as the most preferential filler that can adsorb carbon dioxide from mixture of gases. Membrane samples were tested using single and mixed gases and results reflected the enhancement in carbon dioxide (CO2) permeability. The best CO2/CH4 selectivity of 28.56 is achieved by PU/γ-CD-MOF 0.2 wt%.

Keywords: Polymeric dense gas separation membrane; Gamma-CD-MOF; Polyurethane

Full paper is available at

DOI: 10.1007/s11696-020-01179-1


Chemical Papers 74 (10) 3527–3543 (2020)

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