| 초록 |
Currently wide-used hydrocarbon proton exchange membranes have some disadvantages, such as low mechanical strength under fully swollen conditions and relatively low conductivity under low humidified operating conditions.To supplement these disadvantages about normal hydrocarbon base cast polymer membranes, we employed the pore-filling membranes exhibiting higher stability compared with that. However, polymer electrolytes having high IEC and which are not crosslinked result in being dissolved easily in water. For this reason, the crosslinking agent is employed to prevent the polymer electrolyte from being dissolved in the substrate. The higher crosslinking density is, the higher mechanical strength is, but ion exchange capacity (IEC) decreases. To solve this problem, we used a crosslinking agent consisting of three crosslinkable sites in a molecule, which might be able to improve membane properties without decrease in IEC. |
