| 초록 |
Fluorine containing polymer membranes such as Nafion® membranes have been widely applied in PEMFCs because of their good stability and high proton conductivity. However, these polymers have limitation as proton exchange membranes, due to high cost and reduced proton conductivity at high temperature. Among the alternative polymer electrolytes such as sulfonated poly(ether ether ketone) (SPEEK) shows good thermal and chemical stability. However, SPEEK has serious problems such as poor mechanical property and dimensional stability due to excessive water uptake. Crosslinking is one of efficient ways to overcome these problems. In this study, SPEEK membranes were prepared and crosslinked using in chemically modified nano-silica and 4,4’-diacrloylphenyl ether via electron beam irradiation. The resulting crosslinked membranes were characterized with respect to proton conductivity, water uptake, thermal stability, etc. |
