| 학회 | 한국고분자학회 |
| 학술대회 | 2005년 가을 (10/13 ~ 10/14, 제주 ICC) |
| 권호 | 30권 2호 |
| 발표분야 | 고분자 구조 및 물성 |
| 제목 | Characterizations of Polyimide – Phospo tungstic acid Composite Membranes for High Temperature Fuel Cell Membranes |
| 초록 | Organic-inorganic composite membranes from partially aliphatic sulfonated polyimides and heteropolyacid (HPA)s were synthesized. A series of composite membranes with varying amount of heteropolyacid were prepared by altering the weight ratio of polyimide and HPA. The partially aliphatic sulfonated polyimides are synthesized from 1,4,5,8-naphthalenetetracarboxylic dianhydride, 4,4’-diaminobiphenyl 2,2’-disulfonic acid as the sulfonated diamine, and decamethylene diamine as the aliphatic diamine. The incorporation of HPA is confirmed by FT-IR analyses. When appropriately embedded in a hydrophilic polymer matrix, the hydrated HPAs are expected to endow the composite membrane with their high proton conductivity, while retaining the desirable mechanical properties of the polymer film. These composite membranes were evaluated for thermal stability, ion exchange capacity, water uptake and proton conductivity. Also the extraction of HPA from the polyimide membranes was determined. Though water uptake and IEC decreased with increase in HPA content, the proton conductivity of the composite membranes increased with increase in HPA weight content. This study shows that partially aliphatic sulfonated polyimide composite membranes with HPA can be a viable substitute for Nafion® for fuel cells which show good conductivity comparable to Nafion®117 at temperature nearing 100 oC, keeping in mind that polyimides has good thermal stability and low cost. Acknowledgment : This work was supported by the Ministry of Science and Technology of Korea through the National Research Laboratory Program. |
| 저자 | 최승혁, 장원봉, 이석규, 설용건, 한학수 |
| 소속 | 연세대 |
| 키워드 | electrolyte membrane; fuel cell; phostotunstic acid; polyimide |
