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Preparation and Permeation Characteristics of PTMSP-PDMS-Silica/PEI Composite Membranes  

Lee, Hyun-Kyung (Department of Industrical Chemistry, Sang Myung University)
Hong, Se-Lyung (Department of Chemistry, Sang Myung University)
Publication Information
Membrane Journal / v.18, no.2, 2008 , pp. 146-156 More about this Journal
Abstract
In this study, PTMSP of high permeability and high molecular weight was synthesized, and PTMSP-PDMS graft copolymer was synthesized from poly [1-(trimethylsily)propyne] (PTMSP) and hydroxy-terminated poly(dimethylsiloxane) (PDMS). The PTMSP-PDMS-silica composites were prepared by the addition of 15, 30, or 50 wt% tetraethoxysilane (TEOS) to PTMSP-PDMS graft copolymer by sol-gel process. To investigate the physico-chemical characteristics of PTMSP-PDMS-silica/PEI composite membranes, the analytical methods such as $^1H$-NMR, FT-IR, TGA, XPS, GPC, and SEM have been utilized. The gas permeability and selectivity properties of $H_2,\;O_2,\;N_2,\;CO_2,\;CH_4,\;n-C_4H_{10}$, were evaluated. Permeability of the composite membranes increased as TEOS content and pressure increased. Selectivity of $H_2,\;O_2,\;N_2,\;CO_2,\;CH_4,\;and\;n-C_4H_{10}$, showed the maximum value at 30 wt% of TEOS content and decreased thereafter.
Keywords
PTMSP-PDMS-silica/PEI; composite membrane; sol-gel process;
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