| 학회 |
한국화학공학회 |
| 학술대회 |
2009년 봄 (04/23 ~ 04/24, 광주 김대중컨벤션센터) |
| 권호 |
15권 1호, p.25 |
| 발표분야 |
고분자 |
| 제목 |
Proton Conducting Crosslinked Membranes by Polymer Blending of Triblock Copolymer and Poly(vinyl alcohol) |
| 초록 |
Proton conducting crosslinked membranes have been prepared using polymer blends of PS-b-PHEA-b-PSSA. PS-b-PHEA-b-PSSA triblock copolymer at 28:21:51 wt% was synthesized via ATRP. Upon both thermal and chemical treatments of the membranes, the middle PHEA block of triblock copolymer was crosslinked with PVA via the esterification reaction between OH of membrane and COOH of SA, as demonstrated by FT-IR. IEC decreased from 1.56 to 0.61 meq/g with increasing amounts of PVA and thus the proton conductivity at room temperature decreased from 0.044 to 0.018 S/cm. However, the introduction of PVA resulted in the decrease of water uptake from 87.0 to 44.3%, providing good mechanical properties applicable to MEA for fuel cells. TEM analysis showed the membrane was microphase-separated with a nanometer range and developed to provide the good connectivity of SO3H ionic aggregates. In a single H2/O2 fuel cell system employing the membrane with 50wt% of PVA, the power density of fuel cell was 230 mW/cm2 at 70oC and 100% of relative humidity. TGA showed the thermal stability of membranes decreased with increasing PVA concentrations. |
| 저자 |
박정태1, 안성훈2, 연승현1, 노동규2, 김종학1
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| 소속 |
1연세대 화공생명공학, 2수소연료전지 특성화 사업단 |
| 키워드 |
polymer electrolyte membrane fuel cell (PEMFC); crosslinked; triblock copolymer; proton conductivity; polymer blend
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| E-Mail |
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| 원문파일 |
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