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플라즈마 처리된 폴리설폰 막의 CO2/N2 혼합가스의 투과분리에 대한 연구
Studies on CO2/N2 Mixture Gas Permeation and Separation through Polysulfone Membrane Treated by Plasma Treatment
한양대학교 화학공학과, 안산 425-791
Department of Chemical Engineering, College of Engineering Science, Hanyang University, Ansan, Kyunggido 425-791, Korea
HWAHAK KONGHAK, April 2002, 40(2), 188-195(8), NONE
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Abstract
폴리셀폰 막을 Ar, NH3 플라즈마로 표면 처리하고, 처리 전후의 변화를 관찰하였다. Ar 플라즈마로 처리하였을 때 O/C의 비율이 증가하며 친수성기의 도입이 확인되었고 NH3 플라즈마로 처리하였을 때 아민, 아미노기가 도입되었다. 플라즈마 처리된 폴리셀폰 막에서 CO2의 투과도와 ideal separation factor에 대한 최적조건은 Ar 플라즈마의 경우 10 W-6 min에서 각각 8.6744×10(-10)cm(3)(STP)cm/cm(2)ㆍsㆍcmHg와 14.401이며, NH3 플라즈마의 경우 50 W-8 min에서 7.5922×10(-10)cm(3)(STP)cm/cm(2)ㆍsㆍcmHg와 17.644를 얻었다. 또한 폴리셀폰 막의 흡습성이 유지될 경우, 플라즈마 처리에 의해 표면에 형성된 극성 작용기들과 CO2와의 내부 반응이 증가하고, N2에 비하여 CO2의 용해 선택성이 증가하여 선택도와 투과도가 동시에 향상되는 효과를 나타내었다.
The surface of polysulfone(PSf) membrane modified by Ar, NH3 plasma treatment is measured before and after the treatment. The membrane modified by Ar plasma treatment is increased the O/C ratio and the hydrophilic group, by NH3 plasma treatment is increased the amine group and the amino group. The CO2 permeation and ideal separation factor of the treated membrane measured good condition. The measurance of Ar-10 W-6 min plasma treatment is 8.6744×10(-10) cm(3)(STP)cm/cm(2)ㆍsㆍcmHg and 14.401, it of NH3-50 W-8 min plasma treatment is 7.5922×10 (-10)cm(3)(STP)cm/cm(2)ㆍsㆍcmHg and 17.644. Having the wettability of polysulfone membrane, the polar functional groups of its surface interacted with CO2 increasingly. Because of the soluble selectivity of membrane increased of CO2 than N2, polysulfone membrane improved both the permeability and the selectivity of CO2.
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References
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Chang FY, J. Appl. Polym. Sci., 17, 2915 (1973)
Okamoto KI, Yasugi N, Kawabata T, Tanaka K, Kita H, Chem. Lett., 328 (1996)
