| 초록 |
Ionomers are defined as polymers composed of both electrically neutral segments and ionized segments. Anion-conducting ionomers contain cationic groups such as ammonium, sulfonium, and phosphonium, which can transport anion molecules including hydroxide ions in aqueous medium. Unfortunately, the former ionomers have been suffering from low durability to dimensional changes in repeated wet and dry states and radical attack. Even the second ionomers show easy chemical decomposition under alkaline condition at the elevated temperatures and low processability in preparing both membrane and electrode formation. In this study, anion-conducting perfluorinated ionomers were synthesized via stepwise substitution reactions of sulfonic acid groups located at the end of the side chains in commercially available cation-conducting ionomers. The resulting ionomers were dispersed in nanoscale under a supercritical condition and used as membrane and electrode materials. |
