Title of article :
Molecular engineering of PIM-1/Matrimid blend membranes for gas separation
Author/Authors :
W.F. Yong، نويسنده , , Sam F.Y. Li، نويسنده , , Y.C. Xiao، نويسنده , , P. Li، نويسنده , , K.P. Pramoda، نويسنده , , Y.W. Tong، نويسنده , , T.S. Chung، نويسنده ,
Issue Information :
روزنامه با شماره پیاپی سال 2012
Pages :
11
From page :
47
To page :
57
Abstract :
The polymers of intrinsic microporosity have gained the attention as one of the potential materials for membrane gas separation. The contorted ladder-like structure in polymers of intrinsic microporosity, specifically PIM-1 possesses high permeability but with moderate selectivity for O2/N2, CO2/N2 and CO2/CH4 separation. We report here the most convenient and time efficient strategy of tuning the permeability and selectivity by blending PIM-1 with different compositions of Matrimid. In this work, the physical properties, phase behavior and gas transport properties of PIM-1/Matrimid blends have been explored. The polarized light microscope (PLM) analyses evidence that most of the PIM-1/Matrimid blends reveal partially miscible behavior. The inclusion of PIM-1 in the Matrimid matrix results in a substantial increase in gas permeability and a slight decrease in selectivity. The additions of 5 and 10 wt% PIM-1 into Matrimid induce the permeability increments of 25% and 77%, respectively from the original 9.6 to 12 and 17 Barrer without compromising its CO2/CH4 selectivity. For O2/N2 separation, the incorporation of a small amount of Matrimid (e.g., 5–30 wt%) into PIM-1 promotes a fair increase in selectivity and drives the overall gas separation performance surpassing or close to the upper bound. At binary gas tests of CO2/CH4 (50%/50%), the 30 wt% PIM-1 in Matrimid membrane has a CO2 permeability of 50 Barrer and a CO2/CH4 selectivity of 31.
Keywords :
Partially miscible , Pim-1 , Matrimid , Gas separation , Polymer blend
Journal title :
Journal of Membrane Science
Serial Year :
2012
Journal title :
Journal of Membrane Science
Record number :
1357675
Link To Document :
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