화학공학소재연구정보센터
홈 로그인 로그아웃 연락처 사이트맵
Korea Polymer Journal, Vol.9, No.5, 285-291, October, 2001
Export Citation
Morphology of Membranes Formed from Polysulfone/Polyethersulfone/N-methyl-2-pyrrolidone/Water System by Immersion Precipitation
Ki Jun Baik, Je Young Kim1, Jae Sung Lee2, Sung Chul Kim2, †, and Hwan Kwang Lee3
  • Mobile Electronic Commerce Corp., 104, Commencement of an Enterprise Center, Busan Information and Technology College, Gupo-Dong, Buk-Gu, Busan 616-737, Korea
  • 1Battery Research Institute, LG Chem Research Park, P.O. Box 108, Yusong Science Town, Taejon 305-343, Korea
  • 2Center for Advanced Functional Polymers, Korea Advanced Institute of Science and Technology, 373-1, Kusung-Dong, Yusung-Gu, Taejon 305-701, Korea
  • 3Department of Industrial Chemistry, Chungwoon University, #29, Namjang-Ri, Hongsung-Eub, Hongsung-Gun, Chungnam 350-800, Korea
E-mail:
The polysulfone(PSf)/polyethersulfone(PES) blend membranes were prepared by an immersion precipitation method. N-methyl-2-pyrrolidone(NMP) was used as a solvent and water as a nonsolvent. The composition of the coagulation bath and the dope polymer concentration as well as the blend ratio of two polymers were varied. The membrane morphologies were interpreted on the basis of the phase diagram of the PSf/PES/NMP/water system. As the solvent content in the coagulation bath increased in the single polymer system, the number of macrovoids decreased and the morphology was changed from finger-like to cellular structure. In the given bath condition phase separation occurs earlier for the solutions of PSf/PES blend than for those of single polymer. A horizontally layered structure and horizontal protuberances inside the macrovoid were observed for the membranes formed from PSf/PES blend solutions. This peculiar structure formation can be interpreted by a PSf-rich/PES-rich phase separation followed by a polymer-rich/polymer-lean phase separation during the exchange of solvent and nonsolvent.
  1. Baik KJ, Kim JY, Lee HK, Kim SC, J. Appl. Polym. Sci., 74(9), 2113 (1999) 
  2. Tweddle TA, Kutowy O, Thayer WL, Sourirajan S, Ind. Eng. Chem. Prod. Res. Dev., 22, 320 (1983) 
  3. Swinyard BT, Barrie JA, Br. Polym. J., 20, 317 (1988)
  4. Allen G, McAinsh J, Strazielle C, Eur. Polym. J., 5, 319 (1969) 
  5. Allen G, McAinsh J, Eur. Polym. J., 6, 1635 (1970) 
  6. Staude E, Breitbach L, J. Appl. Polym. Sci., 43, 559 (1991) 
  7. Lee HK, Levon K, Polym.(Korea), 21(2), 241 (1997)
  8. Kim JY, Lee HK, Kim SC, Korean J. Chem. Eng., 17(5), 564 (2000)
  9. Mulder MHV, Hendrikman JO, Wijmans JG, Smolders CA, J. Appl. Polym. Sci., 30, 2805 (1985) 
  10. Doi S, Hamanaka K, Desalination, 80, 167 (1991) 
  11. Radovanovic P, Thiel SW, Hwang ST, J. Membr. Sci., 65, 231 (1992) 
  12. Pinnau I, Wind J, Peinemann KV, Ind. Eng. Chem. Res., 29, 2028 (1990) 
  13. Liu T, Zhang D, Xu S, Sourirajan S, Sep. Sci. Technol., 27, 161 (1992)
  14. Pesek SC, Koros WJ, J. Membr. Sci., 81, 71 (1993) 
  15. Pinnau I, Koros WJ, J. Membr. Sci., 71, 81 (1992) 
  16. Pfromm PH, Pinnau I, Koros WJ, J. Appl. Polym. Sci., 48, 2161 (1993) 
  17. Pinnau I, Koros WJ, J. Appl. Polym. Sci., 43, 1491 (1991) 
  18. Han MJ, Bummer PM, Jay M, Bhattacharyya D, Polymer, 36(24), 4711 (1995) 
  19. vant Hof JA, Reuvers AJ, Boom RM, Rolevink HHM, Smolders CA, J. Membr. Sci., 70, 17 (1992) 
  20. Boom RM, Wienk IM, van den Boomgaard T, Smolders CA, J. Membr. Sci., 73, 277 (1992) 
  21. Tam CM, Dal-Cin M, Guiver MD, J. Membr. Sci., 78, 123 (1993) 
  22. Kapantaidakis GC, Kaldis SP, Dabou XS, Sakellaropoulos GP, J. Membr. Sci., 110(2), 239 (1996) 
  23. Wang Q, Chen X, Zhang J, Pei Y, Polym. Adv. Technol., 8, 712 (1997) 
  24. Smolders CA, Reuvers AJ, Boom RM, Wienk IM, J. Membr. Sci., 73, 259 (1992) 
  25. Mckelvey SA, Koros WJ, J. Membr. Sci., 112(1), 29 (1996) 
  26. Kim YD, Kim JY, Lee HK, Kim SC, J. Appl. Polym. Sci., 74(9), 2124 (1999) 
  27. Kim JY, Lee HK, Baik KJ, Kim SC, J. Appl. Polym. Sci., 65(13), 2643 (1997)