| 학회 |
한국고분자학회 |
| 학술대회 |
2004년 봄 (04/09 ~ 04/10, 고려대학교) |
| 권호 |
29권 1호, p.153 |
| 발표분야 |
기능성 고분자 |
| 제목 |
Fabrication of C-SiO2 membranes using polymer-blending method and their gas separation performances |
| 초록 |
The novel pyrolytic carbon-silica membranes and the carbon membranes prepared by the polymer-blending method consisting of two polymers (polyimide and polyvinylpyrrolidone) were prepared in our previous studies, which showed the high permeation performance. In this study, we introduced the polymer-blending method to the carbon-silica membranes to improve the gas permeation performances. As a result, the carbon-silica membrane prepared by the polymer-blending method showed each intrinsic properties of carbon-silica and carbon membranes. The thermogravimetric analysis (TGA) showed the three-step decomposition of polymer precursor. The first decomposition was observed around 400-450 oC due to the thermal exclusion of PVP. The second decomposition began at 500 oC by the cleavage of imide ring in the siloxane domain. Finally, the degradation of imide ring was observed at 550 oC. The carbon-silica membranes prepared by the polymer-blending method showed higher gas permeabilities as compared with the carbon-silica membranes derived from Si-polyimide. In summary, the carbon-silica membranes pyrolyzed at 500 oC showed the gas permeability for O2 of 38 Barrers [10-10cm3(STP)cm/cm2•s•cmHg] and the O2/N2 selectivity of 5 whereas the carbon-silica membranes prepared by the polymer-blending method showed the gas permeability for O2 of 637 Barrers and O2/N2 selectivity of 8. |
| 저자 |
이지민1, 김연국1, 박호범1, 남상용2, 이영무1
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| 소속 |
1한양대, 2경상대 |
| 키워드 |
carbon-silica; carbon membrane; gas separation
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| E-Mail |
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