| 학회 | 한국고분자학회 |
| 학술대회 | 2004년 가을 (10/08 ~ 10/09, 경북대학교) |
| 권호 | 29권 2호, p.475 |
| 발표분야 | 고분자 합성 |
| 제목 | Preparation of Crosslinked Sulfonated copolyimide membranes with high temperature stability for Fuel Cell |
| 초록 | Fuel cells are emerging as the first choice alternative energy source due to its high and efficient energy conversion compared to internal combustion engine. Polymer electrolyte membrane fuel cells are considered best among the other fuel cell system for transport applications. Electrolyte membrane is an important component of PEMFC and various polymer membranes are considered for that purpose. Polyimides characterized by high thermal and thermo oxidative stability are expected to with stand the cruel fuel cell operating conditions. The sensitivity to hydrolysis is a handicap for polyimides and various approaches to improve the hydrolytic stability are under active research. Crosslinking is expected to render improved hydrolytic stability since crosslinked membranes can effectively resist swelling in water. Moreover crosslinking can reduce the methanolcross over which is a major problem faced in DMFC. Hence crosslinked membranes can serve better in both PEMFC and DMFC. In this study 6 membered polyimides are used since 5 membered ring polyimides are highly susceptible to hydrolysis at high temperatures. The chemical structure ofcrosslinked polyimides is analyzedby FT-IR. The thermal stability of the crosslinked polyimides are analyzed by TGA. The electrochemical properties are analyzedby Water uptake Ion exchange capacity (IEC) and Conductivity and are compared with Nafion 115. These crosslinked polyimides with various back bone structure, synthesized from sulfonated diamine and non-sulfonated diamine exhibitedimproved properties and hence it can be used in fuel cell application as polymer electrolyte membrane This work was supported by the Ministry of Science and Technology of Korea through the National Research Laboratory Program. |
| 저자 | 김도완, 장원봉, 권진욱, 서민범, S. Sundar, 설용건, 한학수 |
| 소속 | 연세대 |
| 키워드 | polyimide; fuel cell; ionomer; polymer electrolyte membrane |
