| 학회 | 한국고분자학회 |
| 학술대회 | 2005년 가을 (10/13 ~ 10/14, 제주 ICC) |
| 권호 | 30권 2호 |
| 발표분야 | 기능성 고분자 |
| 제목 | Highly Proton-Conductive and Hydrolytically Durable Cross-linked Sulfonated Polyimide-Silica Nanocomposite Membranes and Their Fuel Cell Application |
| 초록 | The development of proton exchange membranes (PEMs) for high-temperature PEMFC system can minimize most of shortcoming related with low-temperature PEMFC. This includes the kinetics for electrode reaction, high energy efficiency, and high CO tolerance. Accordingly, there have been great efforts being spent to develop high performance-PEMs for high temperature fuel cell. Among them, organic-inorganic composite membranes have been considered as one of promising materials owing to excellent thermal, mechanical, and chemical stability. Especially, inorganic oxides such as silicon oxide, aluminum oxide, and clay significantly contributed high water retention level in the corresponding composite membranes, and consequently maintained high proton conductivity at high temperature (＞ 80 oC). In the present study, cross-linked sulfonated polyimide-silica nanocomposite membranes were fabricated using different types of fumed silica with the same average particle size. Furthermore, oligomeric compatibilizers were added into the composite membranes to avoid unfavorable self-aggregation of nanosized silica. To prevent the leaching-out problem associated with fumed silica, the oligomeric compatibilizers were chemically bonded with the polyimide matrix. The ultimate goal of this study is to investigate the relationship of membrane performances including current-voltage polarization curve with types of silica. Another goal is to optimize silica content and chain length of the compatibilizers considering physico-chemical properties as well as electrochemical properties. |
| 저자 | 박치훈1, 이창현1, 황신영1, 이영무1, 김주영2, 남상용3 |
| 소속 | 1한양대, 2삼척대, 3경상대 |
| 키워드 | PEMFC; Polyimide; Silica nanocomposite |
