| 학회 |
한국고분자학회 |
| 학술대회 |
2003년 봄 (04/11 ~ 04/12, 연세대학교) |
| 권호 |
28권 1호, p.376 |
| 발표분야 |
특별 심포지엄 |
| 제목 |
Macromolecular Templating Approach for the Synthesis of Hydrothermally Stable Mesoporous Organosilicas with High Periodicity and Thick Framework Wall |
| 초록 |
A strategy for the synthesis of more hydrothermally stable and large periodic mesoporous organosilica materials has been developed for the 2D hexagonal (p6mm) mesoporous ethanesilica by the core-shell approach using nonionic PEO-PLGA-PEO triblock copolymer templates. More hydrophobic PLGA block and well-defined PEO-PLGA-PEO triblock copolymers are demonstrated to be quite effective in confining the organosilicates into ordered mesopohase with the PEO phase at normal experimental condition of 40 ~ 50 ℃ and in constructing more hydrothermally stable and thick mesostructured framework with very small quantity of micropores below 1 vol. %. Highly ordered mesoporous ethanesilica obtained in this study has a very large pore diameter of 7.9 nm and a wall thickness of 4.2 nm at an optimal experimental condition and the other structure with blocked cylindrical mesopores is also obtained, which structure is proven from the 2 step desorption branch of nitrogen adsorption-desorption experiment. Moreover, the mesoporous ethanesilicas prepared with the PEO-PLGA-PEO block templates maintain their structural integrity for up to 25 days in boiling water of 100 ℃. The mesoporous ethanesilica with large mesopores and high hydrothermal stability prepared in this study would be an important material for many applications. |
| 저자 |
조은범;차국헌 |
| 소속 |
삼성종합기술원;서울대 |
| 키워드 |
Mesoporous organosilica; Hydrothermal stability
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| E-Mail |
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