| 학회 |
한국고분자학회 |
| 학술대회 |
2009년 가을 (10/08 ~ 10/09, 광주과학기술원 오룡관) |
| 권호 |
34권 2호 |
| 발표분야 |
고분자 나노 구조물의 합성, 분석 및 응용(국제심포지움) |
| 제목 |
Block copolymer self-assembly in supercritical carbon dioxide and nanoporous structures |
| 초록 |
Supercritical carbon dioxide (scCO2) swells many kinds of polymers. In particular polymers containing fluorine are highly swollen. Therefore, block copolymers having fluorinated blocks are expected to be swollen selectively in scCO2 due to the higher affinity of scCO2 toward the fluorinated blocks. We studied the phase behavior of fluorinated block copolymers swollen in scCO2 and found multiple order-to-order transitions as a function of pressure. In addition, the swollen structures could be frozen by reducing temperature and subsequently carbon dioxide was removed without disturbing the swollen morphologies. As a result, the volume occupied with carbon dioxide was converted to empty space, and hence a variety of nanoporous structures were successfully formed. |
| 저자 |
Hideaki Yokoyama |
| 소속 |
Univ. of Tokyo |
| 키워드 |
Block copolymer; self-assembly; supercritical carbon dioxide; nanoporous
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| E-Mail |
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