폴리실록산이미드 막의 제조와 투과증발특성

장연희; 김정훈; 이수복; 이희우

Journal of the Korean Industrial and Engineering Chemistry, Vol.10, No.7, 1041-1045, November, 1999

Export Citation

폴리실록산이미드 막의 제조와 투과증발특성

The Preparation of Polysiloxaneimide Membranes and their Pervaporation Properties

장연희, 김정훈, 이수복, 이희우

초록

세 가지 종류의 방향족 다이안하이드라이드(6FDA, BTDA, PMDA)와 polydimethysiloxane(DIDA, 평균 분자량 800)을 단독 다이아민으로 하여 축충합반응에 의하여 폴리실록산이미드(PSI) 막을 제조하였다. 이들은 모두 실록산 30~40 wt % 함유하고 있는 고무상의 고분자로서 낮은 밀도, 높은 비자유부피, 그리고 낮은 표면에너지를 가지고 있었다. 제조된 PSI막을 0.05 wt %의 4가지 혼합용매(ethyl acetate, methylene chloride, trichloroethylene, toluene)에 대해 투과증발 특성을 알아본 결과 이들은 유기용매의 소수성 경향이 증가할수록 높은 선택도와 투과도를 보였다.

Three polysiloxaneimide(PSI) as membrane material were prepared by polycondensation of three aromatic dianhydrides(6FDA, BTDA, PMDA) with one siloxane-containing diamine(SIDA, aver. MW. 800). The PSIs were rubbery polymers containing 30~40 wt % of flexible siloxane chains and exhibited low density, high fractional free volume and low surface energy. They were used for pervaporation experiments with 0.05 wt % of four organic aqueous solutions containing ethyl acetatte, methylene chloride, trichloroethylene, and toluene, respectively. With increasing hydrophobicity of organic solvents, both pervaporation selectivity and pemeation flux increase.

Keywords:polysiloxaneimide;organics;pervaporation;surface energy;fractional free volume

[References]

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[1] Powell DM, Chem. Eng. Prog., 90(5), 33 (1994)

[2] Venkatesh M, Chem. Eng. Prog., 93(5), 33 (1997)

[3] Zhu CL, Yuang CW, Fried JR, Greenberg DB, Environ. Prog., 2, 132 (1983)

[4] Semenova SI, "Polyimide Membranes-Application, Fabrication, and Properties," Ed. H. Ohya, p. 83, Kodansha and Gordon & Breach Publishers, Tokyo (1996)

[5] Mittal KL, "Polyimides: Synthesis, Characterization, and Application," Vol. 1 & 2, Plenum Press, New York (1984)

[6] Lupinski JH, Policastro PP, Polym. News, 15, 71 (1990)

[7] Arnold CA, Summers JD, McGrath JE, Polym. Eng. Sci., 29, 1413 (1989)

[8] Babu GN, "Polyimides: Synthesis, Characterization and Application," Ed. K.L. Mittal, p. 51, Plenum Press, New York (1984)

[9] Arnold CA, Chen D, McGrath BE, McGrath JE, Proc. Polym. Mat. Sci. Eng., 59, 934 (1988)

[10] Furukawa N, Yamada Y, Kimura Y, High Perform. Polym., 8, 617 (1996)

[11] Berger A, "Polyimides: Synthesis, Characterization and Application," Ed. K.L. Mittal, p. 67, Plenum Press, New York (1984)

[12] Nagase Y, Mori S, Egawa M, Matsui K, Makromol. Chem., 191, 2413 (1990)

[13] van Krevelen DW, "Properties of Polymers," Ch. 4, p. 189, Elsevier Scientific Publishing Company, Amsterdam, the Netherlands (1990)

[14] Adamson AW, "Physical Chemistry of Surfaces," Ch. 10, p. 379, A Wiley-Interscience Publication, New York (1990)

[15] Chowdhury B, "Polyimides: Synthesis, Characterization and Application," ed. K.L. Mittal, p. 401, Plenum Press, New York (1984)

[16] Boddeker KW, Bengtson G, "Selective Pervaporation of Organics from Water in Pervaporation Membrane Separation Process," Ed. R.Y.M. Huang, p. 437, Elsevier Scientific Publishing Company, Amsterdam (1991)

[17] Nijhuis HH, Mulder MHV, Smolders CA, J. Appl. Polym. Sci., 47, 2227 (1993)

[18] Favre E, Schaetzel P, Nguygen QT, Clement R, Neel J, J. Membr. Sci., 92(2), 169 (1994)