Physical modification of poly [1(trimethylsilyl)-1-propyne] membranes for gas separation

Tsutomu Nakagawa, Shinji Fujisaki, Hiroyuki Nakano, Akon Higuchi

研究成果: 雜誌貢獻期刊論文同行評審

47 引文 斯高帕斯(Scopus)

摘要

Poly[1-(trimethylsilyl)-1-propyne], PMSP, has the highest gas permeability of any synthetic polymer but exhibits a deterioration of these gas permeability properties with time. A technique of blending PMSP with liquid poly (dimethylsiloxanes), PDMS, of different molecular weights was used to alter the decay in gas permeability properties of PMSP. Sorption isotherms and permeability coefficient of CO2 were measured. The Langmuir capacity constant, C′H, decreased with increasing content of PDMS in the membrane. Both soprtion and the permeability behavior showed that modified membranes changed from a glassy state to a rubbery state where the PDMS content of the lower viscosity liquids was larger than 40 wt%. PDMS of higher viscosity was more effective for decreasing of C′H. These results suggest that the filling of larger PDMS molecules occurred selectively in the larger microvoids rather than the smaller ones and the filling of smaller PDMS molecules occured in both the small and large microvoids in the PMSP membrane.

原文???core.languages.en_GB???
頁(從 - 到)183-193
頁數11
期刊Journal of Membrane Science
94
發行號1
DOIs
出版狀態已出版 - 19 9月 1994

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