Membrane Journal (멤브레인)

The Membrane Society of Korea (한국막학회)
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Preparation of Hydrophobic Porous PVDF Membrane and Application for Membrane Distillation

소수성 다공질 PVDF 중공사 분리막 제조 및 막증류 적용

  • Received : 2014.05.19
  • Accepted : 2014.06.19
  • Published : 2014.06.30
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Abstract

Porous PVDF hollow fiber membranes were prepared by hybrid process of TIPS(thermally induced phase separation) and stretching for membrane distillation. The tests were conducted to investigate that permeability of the membrane could be enhanced by reducing membrane wall thickness. During fiber spinning, dope discharge rate from nozzle was reduced and flow rate of bore fluid increased to make the wall thickness thinner. As dope discharge rate from nozzle was reduced and flow rate of bore fluid increased, the membrane wall thickness was reduced. As a result, air permeability, water permeability and vapor permeability of the membranes increased.

열유도상분리법(TIPS) 및 연신의 복합공정을 적용하여 막증류(Membrane distillation, MD)용 다공성 PVDF 중공사 분리막을 제조하였다. 분리막의 투과도를 증가시키기 위하여 분리막 투과도를 향상시킬 수 있는 성능인자들 중 분리막의 벽두께를 감소시키고자 하였다. 분리막의 두께를 감소시키기 위하여 분리막 제조 시 토출량을 감소시키고 중공 형성 시 주입하는 bore fluid 주입량을 증대시켰다. 토출량의 감소 및 bore fluid의 증가에 따라 벽두께는 감소하였고, 공기투과도와 수투과도는 크게 증가하였으며, 결과적으로 막증류 공정에 적용 시 투과플럭스도 증가하는 경향을 보여 주었다.

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References

  1. M. Khayet, P. Godino, and J. I. Mengual, "Nature of flow on sweeping gas membrane distillation", J. Membr. Sci., 170, 243 (2000). https://doi.org/10.1016/S0376-7388(99)00369-5
  2. S. H. Eum, A. S. Kim, and Y. T. Lee, "Permeate flux analysis of direct contact membrane distillation and sweep gas membrane distillation", Membrane Journal, 21, 236 (2011).
  3. L. Song, B. Li, K. K. Sirkar, and J. L. Gilron, "Direct contact membrane distillation-based desalination : novel membranes, devices, larger-scale studies, and a model", Ind. Eng. Chem. Res., 46, 2307 (2007). https://doi.org/10.1021/ie0609968
  4. M. S. El-Bourawi, Z. Ding, R. Ma, and M. Khayet, "A framework for better understanding membrane distillation separation process", J. Membr. Sci., 285, 4 (2006). https://doi.org/10.1016/j.memsci.2006.08.002
  5. K. W. Lawson and D. R. Lloyd, "Membrane distillation", J. Membr. Sci., 124, 1 (1997). https://doi.org/10.1016/S0376-7388(96)00236-0
  6. D. Wang, K. Li, and W. K. Teo, "Porous PVDF asymmetric hollow fiber membranes prepared with the use of small molecular additives", J. Membr. Sci., 178, 13 (2000). https://doi.org/10.1016/S0376-7388(00)00460-9
  7. M. Tomaszewsk, "Membrane distillation-examples of applications in technology and environmental protection", Pol. J. Environ. Stud., 9, 27-36 (2000).
  8. M. Tomaszwska, "Preparation and properties of flat-sheet membranes from poly (vinylidene fluoride) for membrane distillation", Desalination, 104, 1 (1996). https://doi.org/10.1016/0011-9164(96)00020-3
  9. R. Schneider, W. Holz, R. Wollbeck, and S. Ripperger, "Membranes and modules for transmembrane distillation", J. Membr. Sci., 39, 25 (1988). https://doi.org/10.1016/S0376-7388(00)80992-8
  10. P. Hogan, A. Sudjito, A. G. Fane, and G. Morrison, "Desalination by solar heated membrane distillation", Desalination, 81, 81 (1991). https://doi.org/10.1016/0011-9164(91)85047-X
  11. F. Lagana, G. Barbieri, and E. Drioli, "Direct contact membrane distillation: modelling and concentration experiments", J. Membr. Sci., 166, 1 (2000). https://doi.org/10.1016/S0376-7388(99)00234-3
  12. R. W. Schofield, A. G. Fane, and C. J. Fell, "Heat and mass transfer in membrane distillation", J. Membr. Sci., 33, 299 (1987). https://doi.org/10.1016/S0376-7388(00)80287-2
  13. M. S. El-Bourawi, Z. Ding, R. Ma, and M. Khayet, "A framework for better understanding membrane distillation separation process", J. Membr. Sci., 285, 14 (2006).
  14. D. H. Yu, M. A. Jeoung, J. W. Rhim, H. S. Byun, C. H. Jeong, Y. M. Lee, M. W. Seo, and S. Y. Nam, "Preparation and characterization of microporous PVDF membrane for Li-ion rechargeable battery", Membrane Journal, 17, 235 (2007).