Membrane Journal (멤브레인)

The Membrane Society of Korea (한국막학회)
권호 표지

Preparation of Crack-free ZIF-7 Thin Films by Electrospray Deposition

정전분무법에 의한 결함없는 ZIF-7 박막의 제조

  • ;
  • 김진수 (경희대학교 화학공학과)
  • Received : 2013.06.16
  • Accepted : 2013.08.26
  • Published : 2013.08.30
Download PDF
⟨ Previous Next ⟩

Abstract

Zeolitic imidazolate frameworks (ZIFs) have been the focus of interest for their physical and chemical properties, especially, for their extraordinary gas separation properties. In this study, a novel and efficient method for the fabrication of continuous ZIF-7 film on ${\alpha}$-alumina substrate has been investigated. The electrospray deposition method was tried for the first time to prepare ZIF films directly without the necessity of prior substrate seeding. It has the advantage of depositing thin ZIF-7 films directly on the ${\alpha}$-alumina substrate by electrospraying the precursor solution. The ZIF-7 films have been characterized through XRD, FE-SEM, and single gas permeation tests.

ZIF 재료는 독특한 기체 분리 특성을 포함한 물리적, 화학적 특성 때문에 큰 관심을 받아왔다. 본 연구에서는 ${\alpha}$-alumina 지지체 위에 결함 없고 연속적인 ZIF-7 막을 형성하는 새롭고 효율적인 방법이 연구되었다. 지지체 위에 시딩(seeding)을 하지 않고 직접 ZIF-7 박막을 합성하는데 정전분무법이 처음으로 적용되었다. 이 방법은 전구체 용액을 직접 정전분무함으로 ${\alpha}$-alumina 지지체에 ZIF-7 박막을 형성할 수 있었다. ZIF-7 박막은 XRD, FE-SEM, 단일 기체 투과 장치 등을 이용해 분석하였다.

Keywords

References

  1. N. E. Kim, T. B. Kang, and S. L. Hong, "Preparation and characterization of PTMSP/PDMSzeolite composite membranes for gas separation", Membrane Journal, 22, 342 (2012).
  2. S. J. Noh and J. Kim, "Solvothermal synthesis and gas permeation properties of nanoporous HKUST-1 membranes", Membrane Journal, 22, 435 (2012).
  3. M. Shah, M. C. McCarthy, S. Sachdeva, A. Lee, and H. K. Jeong, "Current status of metal-organic framework membranes for gas separations : Promises and challenges", Ind. Eng. Chem. Res., 51, 2179 (2012). https://doi.org/10.1021/ie202038m
  4. B. R. Jung, Y. Son, Y. T. Lee, and N. Kim, "Preparation of organic-inorganic hybrid PES membranes using Fe(II) clathrochelate", Membrane Journal, 23, 80 (2013).
  5. K. K. Lee, T. H. Kim, T. S. Hwang, and Y. T. Hong, "Novel sulfornated poly(arylene ether sulfone) composite membranes containing tetraethyl orthosilicate (TEOS) for PEMFC applications", Membrane Journal, 20, 278 (2010).
  6. B. Kwon, J. Kim, and J. H. Park, "Preparation of thin YSZ film by electrostatic spray deposition", J. Korean Ind. Eng. Chem., 19, 117 (2008).
  7. Y. Li, F. Liang, H. Bux, A. Feldhoff, W. Yang, and J. Caro, "Molecular sieve membrane : supported metal-organic framework with high hydrogen selectivity", Angew. Chem. Int. Ed., 49, 548 (2010). https://doi.org/10.1002/anie.200905645
  8. M. C. McCarthy, V. V. Guerrero, G. V. Barnett, and H.-K. Jeong, "Synthesis of zeolitic imidazolate framework films and membranes with controlled microstructures", Langmuir, 26, 14636 (2010). https://doi.org/10.1021/la102409e
  9. H. T. Kwon and J. Kim, "Synthesis and characterization of sol-gel derived mesoporous titania/alumina membranes", Membrane Journal, 21, 229 (2011).
  10. K. Park, Z. Ni, A. P. Cote, J. Y. Choi, R. Huang, F. J. Uribe-Romo, H. K. Chae, M. O'Keeffe, and O. M. Yaghi, "Exceptional chemical and thermal stability of zeolitic imidazolate frameworks", PNAS, 103, 10186 (2006). https://doi.org/10.1073/pnas.0602439103
  11. Y. Li, F. Liang, H. Bux, W. Yang, and J. Caro, "Zeolitic imidazolate framework ZIF-7 based molecular sieve membrane for hydrogen separation", J. Membr. Sci., 354, 48 (2010). https://doi.org/10.1016/j.memsci.2010.02.074
  12. L. M. Robeson, "The upper bound revisited", J. Membr. Sci., 320, 390 (2008). https://doi.org/10.1016/j.memsci.2008.04.030
  13. D. H. Weinkauf and D. R. Paul, Gas transport properties of thermotropic liquid-crystaline copolyesters. II. The effects of copolymer composition, J. Polym. Sci.: Part B: Polym. Phys. 30, 837 (1992). https://doi.org/10.1002/polb.1992.090300805
  14. G. Illing, K. Hellgardt, M. Schonert, R. J. Wakeman, and A. Jungbauer, "Towards ultra-thin polyaniline films for gas separation", J. Membr. Sci., 253, 199 (2005). https://doi.org/10.1016/j.memsci.2004.12.031
  15. M. E. Rezac and B. Schoberl, "Transport and thermal properties of poly(ether imide)/acetylene- terminated monomer blends", J. Membr. Sci., 156, 211 (1999). https://doi.org/10.1016/S0376-7388(98)00346-9