| 초록 |
Fluorine-containing polymer membranes such as DuPont™ Nafion® have been most frequently employed in fabrication of PEMFCs, which have good mechanical and chemical properties, excellent proton conductivity, and long-term durability. However, some problems associated with such membranes include the complexity of manufacturing process, high cost, and performance degradation at high temperature. Thus alternative materials that can replace those current commercial ones need to be developed. In this study, poly(ether ether ketone) (PEEK) was used as a model compolymer because of its good thermal stability, excellent chemical resistance, and good mechanical properties. The corresponding sulfonated polymer (SPEEK) membranes were crosslinked with dibromoalkanes via Friedel-Crafts reaction. The crosslinked membranes were characterized with respect to dimensional stability, chemical stability, proton conductivity, mechanical strength, methanol crossover. etc. |
