| 학회 |
한국고분자학회 |
| 학술대회 |
2010년 가을 (10/07 ~ 10/08, 대구 EXCO) |
| 권호 |
35권 2호 |
| 발표분야 |
고분자 합성 |
| 제목 |
Synthesis and Characterizations of Sulfonated Poly(arylene ether sulfone)- Polybenzimidazole Multiblock Copolymers via Low-temperature Coupling Reactions for Proton Exchange Membrane Fuel Cells |
| 초록 |
A series of acid-base multiblock copolymers based on sulfonated poly(arylene ether sulfone) (SPES) and polybenzimidazole (PBI) were synthesized. Multiblock copolymers were synthesized by a coupling reaction between SPES and hydroxybiphenyl end capped PBI as hydrophilic and hydrophobic blocks, respectively. The morphology and electrochemical properties of multiblock copolymer membranes were investigated by AFM and impedance analyzer, and compared with those of Nafion® and SPES random copolymers. An increase of sulfonated block size in the multiblock copolymer resulted in enhanced ion exchange capacity and proton conductivity. Ionic crosslinking is established between the sulfonic groups of SPES and the benzimidazole groups of PBI. The ionic crosslinking reduced the dimensional variation of the membranes by decreasing water uptake and membrane swelling. With these properties, acid-base multiblock copolymers seem promising for PEMs. |
| 저자 |
오승연1, 김태호1, 홍성권2, 홍영택1
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| 소속 |
1한국화학(연), 2충남대 |
| 키워드 |
Multiblock copolymer; Poly(arylene ether sulfone); Polybenzimidazole
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| E-Mail |
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