| 학회 |
한국고분자학회 |
| 학술대회 |
2009년 가을 (10/08 ~ 10/09, 광주과학기술원 오룡관) |
| 권호 |
34권 2호 |
| 발표분야 |
고분자 나노 구조물의 합성, 분석 및 응용(국제심포지움) |
| 제목 |
Control of Domain Orientation in Block Copolymer Electrolyte Membranes at the Interface with Humid Air |
| 초록 |
Access to ion transporting channels in polymer electrolyte membranes depends crucially on the orientation of hydrophobic and hydrophilic domains at the surface. We demonstrate that domain orientation of polymer electrolyte membranes made from poly(styrenesulfonate-b-methylbutylene) (PSS-PMB) copolymers can be tuned by controlling sulfonation level and moisture content of the air. At low sulfonation levels, highly ordered hydrophobic PMB cylinders oriented perpendicular to the film surface are obtained, when the film is contacted with humid air. Increasing the sulfonation level results in a transition from perpendicular to parallel orientation. Our conclusion is based on three-dimensional characterization of membranes using electron microscopy of samples prepared by the shadow focused ion beam technique, grazing incident small angle x-ray scattering, and electron tomography. |
| 저자 |
박문정 |
| 소속 |
포항공과대 |
| 키워드 |
Block Copolymer Electrolylte Membrane; Domain Orientation; Fuel Cell
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| E-Mail |
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