화학공학소재연구정보센터
홈 로그인 로그아웃 연락처 사이트맵
Journal of the Korean Industrial and Engineering Chemistry, Vol.13, No.3, 262-267, May, 2002
Export Citation
폴리실록산-이미드 공중합체의 기체 투과 특성
Gas Permeation Properties of Poly(siloxane-imide) Copolymers
김영현, 김선일1, 김진환†
  • 전남대학교 화학공학과, 광주 500-757
  • 1조선대학교 화학공학과, 광주 501-759
Young Hyun Kim, Sun Il Kim1, and Jin Hwan Kim†
  • Department of Chemical Engineering, Chonnam National University, Kwangju 500-757, Korea
  • 1Department of Chemical Engineering, Chosun University, Kwangju 501-759, Korea
E-mail:
초록
Polysiloxane(PSX)의 함량이 다른 poly(siloxane-imide)(PSI) 공중합체막을 제조하고 막의 구조적인 특성과 기체의 투과특성을 연구하였다. PSI막은 1,2,4,5-benzenetetracarboxylic dianhydride(PMDA)와 4,4'-oxydianiline(ODA) 및 PSX를 반응시켜 제조하였다. PSI 막은 우수한 열적 안정성을 가졌으며, PSX의 함량이 증가할수록 사슬간의 평균거리인 d-spacing값이 증가하였다. 기체의 투과도는 PSX함량이 증가할수록 증가하였으며, H2>CO2>O2>N2>CH4의 순서로 감소하였다. 투과도의 증가에도 불구하고 H2>CH4, O2>N2 및 N2/CH4에 대한 선택도는 거의 일정하였으며, CO2/CH4의 선택도는 오히려 증가하였다.
Poly(siloxane-imide)(PSI) copolymer membranes with various poly siloxane(PSX) contents were prepared and their structural characteristics and gas permeation properties of H2, CO2, O2, N2 and CH4 were studied. PSI membranes were obtained by the reaction of 1,2,4,5-benzenetetracarboxylic dianhydride(PMDA), 4,4'-oxydianiline(ODA) and amine-terminated PSX. The PSI membranes showed high thermal stability and their d-spacing value increased with increasing PSX content. The gas permeability coefficients through PSI membranes increased with increasing PSX content and decreased in the order of H2>CO2>O2>N2>CH4. In spite of the permeability enhancement, the permselectivity of CO2/CH4 increased and even those of H2/CH4, O2/N2, N2/CH4 were nearly constant. It was found that the permeability and permselectivity could be controlled by the PSX content.
Keywords:poly(siloxane-imide);polysiloxane;copolymer;permeability;permselectivity
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