| 초록 |
In this study, sulfonated graphene oxide (sGO) was prepared from GO, then the product was reacted with phenyl isocyanate to prepare isocyante modified sGO (isGO) in order to increase some hydrophobicity for a better miscibility with Nafion. Also fluorinated GO (FGO) was prepared from GO and HF in order to prepare a GO derivative which is expected to have a better miscibility with fluorocarbon containing Nafion polymer. The GO derivatives were characterized by FTIR and X-ray photoelectron spectroscopy. Composite membranes of Nafion with GO, isGO, and FGO were prepared, and their adaptability as membranes for direct methanol fuel cell (DMFC) was investigated in terms of proton conductivity, water uptake, and methanol permeability. For all these membranes pristine Nafion membrane was used as a reference. |
