The solubility and swelling of n-C4 and n-C5 vapors in mixed matrix membranes based on amorphous Teflon® AF 2400 and nanoscale fumed silica (FS) have been studied at 25°C. Previous works have indicated that in such systems filler addition induces density variations that do not obey volume additivity, as well as a variation of the swelling capacity.[1] Modeling the experimental solubility isotherms at various filler weight fractions with NELF model [2] allows to evaluate quantitatively the effect that filler addition has on the density of the polymer phase, pol, on the swelling induced by the penetrant in the polymer matrix, and on the penetrant solubility; all quantities are then compared to the behavior of the corresponding experimental values.

SORPTION AND SWELLING BEHAVIOR OF ORGANIC VAPORS IN MIXED MATRIX MEMBRANES BASED ON TEFLON AF 2400 AND FUMED SILICA

FERRARI, MARIA CHIARA;DE ANGELIS, MARIA GRAZIA;GALIZIA, MICHELE;SARTI, GIULIO CESARE
2008

Abstract

The solubility and swelling of n-C4 and n-C5 vapors in mixed matrix membranes based on amorphous Teflon® AF 2400 and nanoscale fumed silica (FS) have been studied at 25°C. Previous works have indicated that in such systems filler addition induces density variations that do not obey volume additivity, as well as a variation of the swelling capacity.[1] Modeling the experimental solubility isotherms at various filler weight fractions with NELF model [2] allows to evaluate quantitatively the effect that filler addition has on the density of the polymer phase, pol, on the swelling induced by the penetrant in the polymer matrix, and on the penetrant solubility; all quantities are then compared to the behavior of the corresponding experimental values.
Proceedings of ENGINEERING WITH MEMBRANES 2008 Membrane processes: Development, Monitoring and Modelling -from the micro to the macro scale-
65
66
M.C. Ferrari; M.G. De Angelis; M. Galizia; G.C. Sarti
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Utilizza questo identificativo per citare o creare un link a questo documento: http://hdl.handle.net/11585/61091
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