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Chemical Sensors 2011, 1: 4
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Research Article
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Effect of nano hydroxyapatite on the selectivity of
CO2, CH4, N2 and O2 in polyurethane membranes
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Ali Poorkhalilb, Hassan Farrokhzada, Alireza Aslania,*
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a Department of Chemistry, Faculty of Science, Vali-E-Asr University, Rafsanjan, Islamic Republic of Iran
b Department of Polymer, Faculty of Engineering, Tarbiat Modares University of Tehran, Tehran, Islamic Republic of Iran
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Abstract |
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Shape memory polyurethane
membranes containing multiblock segments of polycaprolactone with 4, 4′-methylenebis (phenyl isocyanate) (MDI) and diol were
investigated to separate CO2 from CH4. The permeability
and selectivity of membranes for nitrogen, oxygen, methane, and carbon dioxide
were studied. This study indicated that permeability of CO2
increased over 2.4 times by the addition of nano hydroxyapatite
(NHA) but the selectivity of CO2/CH4
and CO2/O2 were facilitated over 108 and 68 times respectively
upon the addition of nano hydroxyapatite. The permselectivity of CO2/N2 improved
34.6 times with nano hydroxyapatite in polyurethane membranes. Characterizations were
carried out by X-Ray Diffraction (XRD), Scanning Electron Microscopy (SEM) and Fourier
Transform Infrared Spectroscopy (FT-IR).
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Keywords |
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Membranes; Polyurethane; Permeability; Nano hydroxyapatite
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