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P. A. Konik, M. Yu. Yablokova, N. A. Yankova, E. A. Berdonosova, L. G. Gasanova, E. V. Meshcheryakova, S. N. Klyamkin
The influence of polymer concentration and
production technique on gas transport and gas sorption properties of
copolyetherimide-based composite membranes containing MIL-101 filler
Abstract
Composite mixed-matrix membranes for gas
separation containing copolyetherimide Siltem® as the polymer matrix
and metal-organic framework MIL-101 (10% wt.) as the active filler, were
obtained using dry and wet-dry formation techniques. It has been determined
that the polymer concentration in the initial solution does not significantly
affect the permeability of the membrane films produced by the dry technique.
The CO2/CH4 selectivity of the membranes containing
MIL-101 is ~2 times higher than the selectivity of the initial polymer
membranes. The materials synthesized using the wet-dry formation possess
increased permeability and inverted CO2/CH4 selectivity
which indicates the changes of gas transport mechanism. With the increase of
polymer concentration, the selectivity of the membranes obtained by the wet-dry
technique, increases significantly due to the formation of the dense selective
layer.
Key words: mixed-matrix membranes, gas
separation, morphology, gas transport properties, gas sorption properties,
permeability.
Copyright (C) Chemistry Dept., Moscow State University, 2002
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