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Effect of Support Resistance ＆ Coating Thickness on Ethylene/Nitrogen Separation of PDMS Composite Membranes  

김정훈 (한국화학연구원 화학기술연구부)
최승학 (한국화학연구원 화학기술연구부)
박인준 (한국화학연구원 화학기술연구부)
이수복 (한국화학연구원 화학기술연구부)
강득주 (㈜제이오)
Publication Information
Membrane Journal / v.14, no.1, 2004 , pp. 57-65 More about this Journal
Abstract
The effect of porous support layer resistance and PDMS (polydimethylsiloxane) coating thickness on ethylene/nitrogen separation of composite membranes was studied with the model of Pinnau and Wijmans〔1〕. To control the support resistance (or permeance), PES porous membranes were prepared by phase inversion process with various PES/NMP dope concentrations. The thickness of selective PDMS top layer was controlled by using a spin coater. Its cross-section and coating thickness were observed by scanning electron microscope (SEM). Pure gas permeation test was done with ethylene and nitrogen, respectively. The experimental result for olefin/nitrogen separation process matched well with theoretical result from the model used. The result shows that optimization between PDMS coating thickness and support resistance is important to get PDMS composite membranes with best performance.
Keywords
polydimethylsiloxane; composite Membrane; resistance model; membrane thickness; ethylene;
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Times Cited By KSCI : 1  (Citation Analysis)
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