| 학회 |
한국화학공학회 |
| 학술대회 |
2014년 가을 (10/22 ~ 10/24, 대전 DCC) |
| 권호 |
20권 2호, p.2406 |
| 발표분야 |
양승만 교수 추모 심포지엄 : 유체, 입자, 그리고 빛(Fluids, Particles, and Light) |
| 제목 |
Bulk Synthesis of Macroporous Particles by Colloidal Templating |
| 초록 |
We have prepared composite colloidal crystals of polystyrene beads with inorganic materials (TiO2 or SiO2) inside oil-in-formamide emulsions and then burned out polymer beads by heat treatment around 500 oC leaving macroporous particles. Since pore size is comparable to light wavelength, they can scatter light strongly and thus may show reflection color due to bragg scattering. However, due to inevitable slight deviation in pore diameter or position, the white color from random multiple scattering would be dominant. To address this issue, heat treatment was done under nitrogen, in which polystyrene was partially carbonized and they could show clear structural color. Therefore, those macroporous particles can be used as non-bleaching pigments. Furthermore, they could be useful as electrode for dye-sensitized solar cells due to their strong light scattering property or cathode materials for Li-ion battery due to fast ion transport inside pores. In this presentation, I will review several methods for fabricating those porous particles by colloidal templating process and their applications. |
| 저자 |
Gi-Ra Yi |
| 소속 |
School of Chemical Engineeirng |
| 키워드 |
Colloidal templating; Macropore; Self-assembly; Emulsions
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| E-Mail |
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| 원문파일 |
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