DOI QR코드

DOI QR Code

Influence of Hot Pressing on the Pore Structure of Nafion Electrolyte Membrane Investigated by 1H NMR

  • 발행 : 2009.07.20

초록

The influence of hot pressing on the pore structures of Nafion membranes was investigated by observing the Nafion before and after hot pressing with $^1H$ nuclear magnetic resonance (NMR) spectroscopy. The freezing point depression and chemical shift data of water in the Nafion indicated the presence of two different pore size ranges in Nafion. Hot pressing mainly reduced the sizes and number of the big pores. The reduction of water uptake and proton conductivity after hot pressing was explained by this variation of pore size and number. We demonstrated the potential application of chemical shift data and NMR cryoporometry experiments to measure the relative pore sizes, on a nano scale, and numbers.

키워드

참고문헌

  1. Mauritz, K. A.; Moore, R. B. Chem. Rev. 2004, 104, 4535 https://doi.org/10.1021/cr0207123
  2. Cappadonia, M.; Erning, J. W.; Saberi Niaki, S. M.; Stimming, U. Solid State Ionics 1995, 77, 65 https://doi.org/10.1016/0167-2738(94)00289-5
  3. Hansen, E. W.; Schmidt, R.; Stöcker, M. J. Phys. Chem. 1996, 100, 11396 https://doi.org/10.1021/jp960305t
  4. Strange, J. H.; Rahman, M.; Smith, E. G. Phys. Rev. Lett. 1993, 71, 3589 https://doi.org/10.1103/PhysRevLett.71.3589
  5. Hansen, E. W.; Fonnum, G.; Weng, E. J. Phys. Chem. 2005, 109, 24295 https://doi.org/10.1021/jp055175f
  6. Jeon, J. D.; Kwak, S.-Y. J. Phys. Chem. B 2007, 111, 9437 https://doi.org/10.1021/jp070980a
  7. Bunce, N. J.; Sondheimer, S. J.; Fyfe, C. A. Macromolecules 1986, 19, 333 https://doi.org/10.1021/ma00156a015

피인용 문헌

  1. H NMR Spectroscopy vol.34, pp.2, 2013, https://doi.org/10.5012/bkcs.2013.34.2.510
  2. H nuclear magnetic resonance study of hydrated water dynamics in perfluorosulfonic acid ionomer Nafion vol.106, pp.2, 2015, https://doi.org/10.1063/1.4905602
  3. Mobility of Cations and Water Molecules in Sulfocation-Exchange Membranes Based on Polyethylene and Sulfonated Grafted Polystyrene vol.2, pp.1, 2009, https://doi.org/10.1134/s2517751620010096