Gas permeability of polyphosphazene membranes
Identifieur interne : 003646 ( Main/Merge ); précédent : 003645; suivant : 003647Gas permeability of polyphosphazene membranes
Auteurs : E. Drioli ; S.-M. Zhang ; A. Basile [Italie] ; G. Golemme ; S. N. Gaeta [Italie] ; H.-C. Zhang [Italie]Source :
- Gas Separation and Purification [ 0950-4214 ] ; 1991.
Abstract
A series of dense membranes for gas separation based on poly[bis(phenoxy)phosphazene] (PPOP) were prepared in flat sheet configurations. They were characterized by viscosimetry, differential scanning calorimetry (DSC), thermogravimetry (TG), X-ray diffraction (XRD) and scanning electron microscopy (SEM). Permeation tests of O2, N2, He and CO2 were made at five different temperatures below the T(1) transition of PPOP, which gave results that proved to be stable and reversible with temperature. The Arrhenius plots of permeabilities were linear, and showed that the faster permeability of CO2 with respect to He was due to a larger solubility. Interesting O2 to N2 selectivity ratios were obtained.
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DOI: 10.1016/0950-4214(91)80033-2
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