Gas Separation Properties of Microporous Carbon Membranes Containing Mesopores

서지정보

· 발행기관 : 한국막학회
· 수록지 정보 : 멤브레인 / 28권 / 4호 / 221 ~ 232페이지
· 저자명 : 박호범, 신재은

초록

The silica containing carbon (C-SiO2) membranes were fabricated using poly(imide siloxane)(Si-PI) and polyvinylpyrrolidone (PVP) blended polymer. The characteristics of porous carbon structures prepared by the pyrolysis of polymer blends were related with the micro-phase separation behaviors of the two polymers. The glass transition temperatures (Tg) of the mixed polymer blends of Si-PI and PVP were observed with a single Tg using differential scanning calorimetry. Furthermore, the nitrogen adsorption isotherms of the C-SiO2 membranes were investigated to define the characteristics of porous carbon structures. The C-SiO2 membranes derived from Si-PI/PVP showed the type IV isotherm and possessed the hysteresis loop, which was associated with the mesoporous carbon structures. For the molecular sieving probe, the C-SiO2 membranes were prepared with the ratio of Si-PI/PVP and the pyrolysis conditions, such as the pyrolysis temperature and the isothermal times. Consequently, the C-SiO2 membranes prepared by the pyrolysis of Si-PI/PVP at 550°C with the isothermal time of 120 min showed the O2 permeability of 820 Barrer (1 × 10-10 cm3(STP)cm/cm2⋅s⋅cmHg) and O2/N2 selectivity of 14.

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