The effect of self-assembled multilayer formation via LbL technique on thermomechanical and transport properties of Nafion (R) 112 based composite membranes for PEM fuel cells


Deligoez H. , Yilmaztuerk S., Yilmazoglu M., Damyan H.

JOURNAL OF MEMBRANE SCIENCE, cilt.351, ss.131-140, 2010 (SCI İndekslerine Giren Dergi) identifier identifier

  • Cilt numarası: 351
  • Basım Tarihi: 2010
  • Doi Numarası: 10.1016/j.memsci.2010.01.041
  • Dergi Adı: JOURNAL OF MEMBRANE SCIENCE
  • Sayfa Sayısı: ss.131-140

Özet

Highly proton conductive and mechanically stable Nafion 112 based composite membranes with suppressed methanol permeability were prepared via Layer-by-Layer (LbL) technique for fuel cell applications. It was observed from UV-vis results that the polyelectrolyte layers growth on Nafion membrane surface regularly. (PAH/PSS)(20)-H+ with 0.01 M NaCl exhibited 39.9% reduction in methanol permittivity and nearly 2 times higher proton conductivity (0.152 S cm(-1)) than that of untreated Nafion (R) 112. Promisingly, it was found that the membrane selectivity (Phi) values of all multilayered composite membranes in proton form prepared from polyelectrolytes comprising NaCl were higher than that of both untreated and chemically treated Nafion (R) 112. Furthermore, the mechanical and thermal properties of the composite membrane obtained from polyelectrolytes free salt were enhanced due to the interaction between the polar phase of Nafion and anionic/cationic charges of polyions. (C) 2010 Elsevier B.V. All rights reserved.

Highly proton conductive and mechanically stable Nafion®112 based composite membranes with suppressed methanol permeability were prepared via Layer-by-Layer (LbL) technique for fuel cell applications. It was observed from UV–vis results that the polyelectrolyte layers growth on Nafion membrane surface regularly. (PAH/PSS)20–H+ with 0.01 M NaCl exhibited 39.9% reduction in methanol permittivity and nearly 2 times higher proton conductivity (0.152 S cm−1) than that of untreated Nafion®112. Promisingly, it was found that the membrane selectivity (Φ) values of all multilayered composite membranes in proton form prepared from polyelectrolytes comprising NaCl were higher than that of both untreated and chemically treated Nafion®112. Furthermore, the mechanical and thermal properties of the composite membrane obtained from polyelectrolytes free salt were enhanced due to the interaction between the polar phase of Nafion and anionic/cationic charges of polyions