| 학회 |
한국고분자학회 |
| 학술대회 |
2009년 가을 (10/08 ~ 10/09, 광주과학기술원 오룡관) |
| 권호 |
34권 2호 |
| 발표분야 |
기능성 고분자 |
| 제목 |
Morphology and DMFC Membrane Properties of Sulfonated Poly(arylene ether sulfone) / Diethoxydimethylsilane Hybrids |
| 초록 |
A new approach for improving the DMFC membrane transport properties of sulfonated poly(arylene ether sulfone) copolymers (SPAES, degree of sulfonation = 60 %) has been demonstrated, which is based on controlling the water-channel structure and the state of water by in-situ hybridization of ORMOSIL (Organically Modified SILicates). Diethoxydimethylsilane (DEDMS) was employed as a functional ORMOSIL precursor. Its hydrophobic nature made it possible to adjust the hydrophilicity of the resulting hybrid membranes. An increase of DEDMS uptake into SPAES membranes allowed the water uptake to decrease and the water channels to become narrow and tortuous. A noteworthy observation is that the incorporation of DEDMS into SPAES was effective in suppressing the methanol crossover with slightly sacrificing the proton conductivity, resulting in the higher selectivity. This improvement in DFMC membrane transport properties was discussed in terms of the water-channel structure and the state of water. |
| 저자 |
소순용1, 홍영택2, 이상영3, 김성철1
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| 소속 |
1KAIST, 2한국화학(연), 3강원대 |
| 키워드 |
sulfonated poly(arylene ether sulfone); diethoxydimethylsilane; DMFC membranes; water-channel structure; state of water
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| E-Mail |
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