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Carbon Molecular Sieve Membranes Derived from Thermally Labile Polymer Containing Polyimide and Their Gas Separation Properties  

Young Moo Lee (National Research Laboratory for Membranes, School of Chemical Engineering, College of Engineering, Hanyang University)
Youn Kook Kim (National Research Laboratory for Membranes, School of Chemical Engineering, College of Engineering, Hanyang University)
Ji Min Lee (National Research Laboratory for Membranes, School of Chemical Engineering, College of Engineering, Hanyang University)
Ho Bum Park (National Research Laboratory for Membranes, School of Chemical Engineering, College of Engineering, Hanyang University)
Publication Information
Membrane Journal / v.13, no.3, 2003 , pp. 182-190 More about this Journal
Abstract
Carbon molecular sieve (CMS) membranes were prepared by the pyrolysis of polyvinylpyrrolidone containing polyimide precursors. We have prepared the polymer precursors, pyrolyzed polymer and investigated the effect of pyrolyzing polymer on the characteristics of carbon structures and gas separation properties of the CMS membranes. Thermogravimetric analysis (TGA) showed the two-step decomposition of polymer precursor. First decomposition of the pyrolyzing polymer began around $400^{\circ}C$ while carbonizing polymer showed the decomposition around $550^{\circ}C$. The gas permeabilities through the CMS membranes were enhanced by the introduction of the pyrolyzing polymer and decreased with increased final pyrolysis temperature. The CMS membrane pyrolyzed at $550^{\circ}C$. derived from precursor containing 5wt% PVP as a pyrolyzing polymer showed gas permeability for $O_2$ of 808 Barrers [$10^{-10}cm^3 (STP)cm/cm^2scmHg]$ and $O_2/N_2$ selectivity of 7.
Keywords
carbon molecular sieve membrane; pyrolyzing polymer; polyimide; polyvinylpyrrolidone; gas separation;
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Times Cited By KSCI : 2  (Citation Analysis)
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