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http://dx.doi.org/10.14579/MEMBRANE_JOURNAL.2015.25.4.343

Characterization and Preparation of Polyimide Copolymer Membranes by Non-Solvent Induced Phase Separation Method  

Lee, Jung Moo (Department of Materials Engineering and Convergence Technology, Gyeongsang National University)
Park, Jeong Ho (Department of Materials Engineering and Convergence Technology, Gyeongsang National University)
Kim, Deuk Ju (Department of Materials Engineering and Convergence Technology, Gyeongsang National University)
Lee, Myung Gun (Aekyung Petrochemical Co., LTD.)
Nam, Sang Yong (Department of Materials Engineering and Convergence Technology, Gyeongsang National University)
Publication Information
Membrane Journal / v.25, no.4, 2015 , pp. 343-351 More about this Journal
Abstract
In this study, we synthesis polyimide with high gas selectivity using 2,2-bis(3,4-carboxylphenyl) hexafluoropropane, 2,4,6-Trimethyl-1,3-phenylenediamine (DAM) and 4,4-Methylenedianiline (p-MDA), and then the asymmetric membrane was fabricated by non-solvent phase separation method. To confirm the property change of the membrane using different solvent, we measured and compared the viscosity of the polymer solution, cloud point and non-solvent phase separation coefficient. The morphology and gas separation property of membrane prepared by phase separation method was confirmed using Field Emission Scanning Electron Microsope and the single gas permeation measurement apparatus. The single gas ($CH_4$, $N_2$, $O_2$, $CO_2$) permeation property and selectivity value of the membrane prepared with NMP was higher than the membrane prepared with DMAc. We confirmed that the gas selectivity of the membrane increased and the permeation property decreased with increasing of the solvent evaporation time.
Keywords
Polyimide; nonsolvent induced phase separation; asymmetric membrane; gas separation;
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Times Cited By KSCI : 4  (Citation Analysis)
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