멤브레인 (Membrane Journal)

  • 제21권3호
  • /
  • Pages.247-255
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  • 2011
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  • 1226-0088(pISSN)
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  • 2288-7253(eISSN)
한국막학회 (The Membrane Society of Korea)
권호 표지

술폰화 폴리아릴렌에테르술폰/개질된 그라핀 복합막의 이온전도도 및 메탄올 투과도

Proton Conductivity and Methanol Permeability of Sulfonated Poly(aryl ether sulfone)/Modified Graphene Hybrid Membranes

  • 허훈 (한국생산기술연구원) ;
  • 김득주 (경상대학교 나노신소재공학과, 아이큐브 사업단) ;
  • 남상용 (경상대학교 나노신소재공학과, 아이큐브 사업단)
  • Huh, Hoon (Korea Institute of Industrial Technology (KITECH)) ;
  • Kim, Deuk-Ju (School of Materials Science and Engineering, i-Cube Center, Gyeongsang National University) ;
  • Nam, Sang-Yong (School of Materials Science and Engineering, i-Cube Center, Gyeongsang National University)
  • 투고 : 2011.08.25
  • 심사 : 2011.09.22
  • 발행 : 2011.09.30
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초록

본 연구에서는 뛰어난 전도도와 물리적 강도를 가지는 그라핀의 고른 분산성을 얻기 위하여 두 가지 다른 방법으로 그라핀을 개질시켰다. 그리고 SPAES/그라핀 복합막은 각기 다른 함량을 첨가하여 제조되었으며 그라핀의 제조방법과 첨가된 그라핀의 함량에 따른 성능을 비교하였다. 복합막의 모폴로지는 SEM을 이용하여 관찰하였으며 개질된 그라핀의 화학적 구조는 FT-IR과 TGA를 사용하여 분석되었다. 그라핀의 함량변화가 0.5~3.0 wt% 일 때 복합막의 이온전도도와 메탄올 투과도를 측정하였으며 $80^{\circ}C$, 100% 가습상태에서 SPAES/그라핀 복합막의 이온전도도(0.216 S/cm)는 순수한 SPAES 전해질 막보다 높은 이온전도도(0.098 S/cm)를 나타내었으며 그라핀의 함량이 1.5 wt%까지 증가될 때 메탄올 투과도는 감소되었다.

In this study, to obtain good dispersity of graphene which has excellent conductivity and mechanical strength, the graphene was modified by two different methods. Then the SPAES/graphene hybrid membranes were fabricated from different graphene contents. We compared performance of composite membrane with different preparing method of graphene and content of modified graphene. The morphology of the composite membranes has been investigated using SEM. Chemical structure of modified graphene was analyzed using by FT-IR and EDX. The proton conductivity and methanol permeability of the hybrid membranes were studied with changing graphene content from 0.5 to 3.0 wt.%. The SPAES/modified graphene composite membranes showed high proton conductivity (0.21 S/cm) compared with the SPAES membrane (0.09 S/cm) at $80^{\circ}C$ and 100% relative humidity condition. And the methanol permeability was decreased linearly as the content of modified graphene increased from 0 to 1.5 wt%.

키워드

참고문헌

  1. H. Wu, D. Wexler, H. Liu, "Durability investigation of graphene-supported Pt nanocatalysts for PEM fuel cells", J. Solid State Electrochem., 15, 1057 (2011). https://doi.org/10.1007/s10008-011-1317-8
  2. N. Jha, R. I. Jafri, N. Rajalakshmi, and S. Ramaprabhu, "Graphene-multi walled carbon nanotube hybrid electrocatalyst support material for direct methanol fuel cell", Int. J. Hydrogen. Energy, 36, 7284 (2011). https://doi.org/10.1016/j.ijhydene.2011.03.008
  3. J. Y. Park, J. K. Choi, K. J. Choi, T. S. Hwang, H. J. Kim, and Y. T. Hong, "Effects of mixed casting solvents on morphology and characteristics of sulfonated poly(aryl ether sulfone) membranes for DMFC Applications", Membrane Journal, 18, 282 (2008).
  4. Y. Lin, H. Li, C. Liu, W. Xing, and X. Ji, "Surface-modified Nafion membranes with mesoporous $SiO_2$ layers via a facile dip-coating approach for direct methanol fuel cells", J. Power Sources, 185, 904 (2008). https://doi.org/10.1016/j.jpowsour.2008.08.067
  5. J. J. Jeong, K. S. Yoon, J. K. Choi, Y. J. Kim, and Y. T. Hong, "Preparation and characterization of the $H_3PO_4$-doped sulfonated poly(aryl ether benzimidazole) membrane for polymer electrolyte membrane fuel cell", Membrane Journal, 16, 276 (2006).
  6. K. S. Yoon, J. H. Choi, J. K. Choi, S. K. Hong, Y. T. Hong, and H. S. Byun, "Fabrication and characteristic of partially covalent-crosslinked poly (arylene ether sulfone)s for use in a fuel cell", Membrane Journal, 18, 274 (2004).
  7. H. Dai, R. Guan, C. Li, and J. Liu, "Development and characterization of sulfonated poly(ether sulfone) forproton exchange membrane materials", Solid State Ionics, 178, 339 (2007). https://doi.org/10.1016/j.ssi.2006.09.013
  8. M. S. subramanian and G. Sasikumar, "Sulfonated Polyether Sulfone-Poly(vinylidene fluoride) Blend Membrane for DMFC Applications", J. Appl. Polym. Sci., 117, 801 (2010). https://doi.org/10.1002/app.31087
  9. H. Tang, Z. Wan, M. Pan, and S. P. Jiang, "Self-assembled Nafion-silica nanoparticles for elevated- high temperature polymer electrolyte membrane fuel cells", Electrochem. Commun., 9, 2003 (2007). https://doi.org/10.1016/j.elecom.2007.05.024
  10. P. Bebin, M. Caravanier, and H. Galiano, "Nafion${\circledR}$/ clay-$SO_3H$ membrane for proton exchange membrane fuel cell application", J. Membr. Sci., 278, 35 (2006). https://doi.org/10.1016/j.memsci.2005.10.042
  11. T. Fu, Z. Cui, S. Zhong, Y. Shi, C. Zhao, G. Zhang, K. Shao, H. Na, and W. Xing, "Sulfonated poly(ether ether ketone)/clay-$SO_3H$ hybrid proton exchange membranes for direct methanol fuel cells", J. Power Sources, 185, 32 (2008). https://doi.org/10.1016/j.jpowsour.2008.07.004
  12. Z. Cui, W. Xing, C. Liu, J. Liao, and Hong Zhang, "Chitosan/heteropolyacid composite membranes for direct methanol fuel cell", J. Power Sources, 188, 24 (2009). https://doi.org/10.1016/j.jpowsour.2008.11.108
  13. A. Mahreni, A. B. Mohamad, A. A. H. Kadhum, W. R. W. Daud, and S. E. Iyuke, "Nafion/silicon oxide/phosphotungstic acid nanocomposite membrane with enhanced proton conductivity", J. Membr. Sci., 327, 32, (2009). https://doi.org/10.1016/j.memsci.2008.10.048
  14. Y. Kozawa, S. Suzuki, M. Miyayama, T. Okumiya, and E. Traversa, "Proton conducting membranes composed of sulfonated poly(etheretherketone) and zirconium phosphate nanosheets for fuel cell applications", Solid State Ionics, 181, 348 (2010). https://doi.org/10.1016/j.ssi.2009.12.017
  15. H. Hou, G. Sun, Z. Wu, W. Jin, and Q. Xin, "Zirconium phosphate/Nafion115 composite membrane for high-concentration DMFC", Int. J. Hydrogen Energy, 33, 3402 (2008). https://doi.org/10.1016/j.ijhydene.2008.03.060
  16. M. J. McAllister, J. L. Li, D. H. Adamson, H. C. Schniepp, A. A. Abdala, J. Liu, M. H. Alonso, D. L. Milius, R. Car, R. K. Prud'homme, and I. A. Aksay, "Single Sheet Functionalized Graphene by Oxidation and Thermal Expansion of Graphite", Chem. Mater., 19, 4396 (2007). https://doi.org/10.1021/cm0630800
  17. S. Watcharotone, D. A. Dikin, S. Stankovich, R. Piner, I. H. Jung, G. H. B. Dommett, G. Evmenenko, S. E. Wu, S. F. Chen, C. P. Liu, S. T. Nguyen, and R. S. Ruoff, "Graphene-Silica Composite Thin Films as Transparent Conductors", Nano Lett., 7, 1888, (2007). https://doi.org/10.1021/nl070477+
  18. Y. R. Lee, A. V. Raghu, H. M. Jeong, and B. K. Kim, "Properties of Waterborne Polyurethane/ Functionalized Graphene Sheet Nanocomposites Prepared by an in situ Method", Macromol. Chem. Phys., 210, 1247 (2009). https://doi.org/10.1002/macp.200900157
  19. Y. T. Hong, C. H. Lee, H. S. Park, K. A. Min, H. J. Kim, S. Y. Nam, and Y. M. Lee, "Improvement of electrochemical performances of sulfonated poly(arylene ether sulfone) via incorporation of sulfonated poly(arylene ether benzimidazole)", J. Power Sources, 175, 724 (2008). https://doi.org/10.1016/j.jpowsour.2007.09.068
  20. S. L. Chou, J. Z. Wang, M. Choucair, H. K. Liu, J. A. Stride, and S. X. Dou, "Enhanced reversible lithium storage in a nanosize silicon/graphene composite", Electrochem. Commun., 12, 303 (2010). https://doi.org/10.1016/j.elecom.2009.12.024
  21. J. Ji, G. Zhang, H. Chen, S. Wang, G. Zhang, F. Zhang, and X. Fan, "Sulfonated graphene as water- tolerant solid acid catalyst", Chem. Sci., 2, 484 (2011). https://doi.org/10.1039/c0sc00484g
  22. Y. Si and E. T. Samulski, "Synthesis of Water Soluble Graphene", Nano Lett., 8, 1679 (2008). https://doi.org/10.1021/nl080604h
  23. Y. Xu, Y. Wang, J. Liang, Y. Huang, Y. Ma, X. Wan, and Y. Chen, "A Hybrid Material of Graphene and Poly(3,4-ethyldioxythiophene) with High Conductivity, Flexibility, and Transparency", Nano Res., 2, 343 (2009). https://doi.org/10.1007/s12274-009-9032-9
  24. J. H. Jung, J. H. Jeon, V. Sridhar, and I. K. Oh, "Electro-active graphene-Nafion actuators", Carbon, 49, 1279 (2011). https://doi.org/10.1016/j.carbon.2010.11.047
  25. Z. Gaowen, and Z. Zhentao, "Organic/inorganic composite membranes for application in DMFC", J. Membr. Sci., 261, 107 (2005). https://doi.org/10.1016/j.memsci.2005.03.036
  26. T. Fu, Z. Cui, S. Zhong, Y. Shi, C. Zhao, G. Zhang, K. Shao, H. Na, and W. Xing, "Sulfonated poly(ether ether ketone)/clay-$SO_3H$ hybrid proton exchange membranes for direct methanol fuel cells", J. Power Sources, 185, 32 (2008). https://doi.org/10.1016/j.jpowsour.2008.07.004
  27. K. S. Choi, F. Liu, J. S. Choi, and T. S. Seo, "Fabrication of Free-Standing Multilayered Graphene and Poly(3,4-ethylenedioxythiophene) Composite Films with Enhanced Conductive and Mechanical Properties", Langmuir, 26, 12902 (2010). https://doi.org/10.1021/la101698j
  28. G. Choudalakis and A. D. Gotsis, "Permeability of polymer/clay nanocomposites: A review", Eur. Polym. J., 45, 967 (2009). https://doi.org/10.1016/j.eurpolymj.2009.01.027