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1610135 
Journal Article 
Mixed matrix membranes of aminosilanes grafted FAU/EMT zeolite and cross-linked polyimide for CO2/CH4 separation 
Chen, XY; Nik, OG; Rodrigue, D; Kaliaguine, S 
2012 
1 
Polymer
ISSN: 0032-3861 
53 
15 
3269-3280 
WOS:000306151100025 
Intergrowth Faujasite and EMC-2 zeolites (FAU/EMT) were
grafted with 3-aminopropyltriethoxysilane (AFTES), 3-aminopropylmethyldiethoxysilane (APMDES),
and 3-aminopropyldimethylethoxysilane (APDMES) containing respectively trihydrolyzable ethoxy
groups (3E), di-hydrolyzable ethoxy groups (2E), and monohydrolyzable ethoxy group (1E) in
different polarities solvent of isopropanol (IPA), isopropanol/water mixture, 95/5 V/V (IPAW) and
toluene (TOL) to prepare mixed matrix membranes with 6FDA-ODA polyimide cross-linked by APTMDS
(Bis(3-aminopropyl)-tetramethyldisiloxane) as the organic phase. Membrane comprising amine-
grafted zeolite with a commercial polyimide (Matrimid 5218 US) was also fabricated for
comparison. The gas transport properties of these mixed matrix membranes (MMM) for pure gas and
blends of CO2 and CH4 were investigated at 35 degrees C and 150 psi. The results showed that the
performance of MMM with 6FDA-ODA at 25 wt.% zeolite is excellent for CO2/CH4 separation. A
detailed study of the relation between MMM properties and their morphology as affected by their
interactions with the amine-grafted inorganic phase and the cross-linking agent is reported.
Crown Copyright (C) 2012 Published by Elsevier Ltd. All rights reserved. 
Mixed matrix membrane; Amine-grafted zeolite; Cross-linked polyimide