| 학회 |
한국고분자학회 |
| 학술대회 |
2018년 봄 (04/04 ~ 04/06, 대전컨벤션센터) |
| 권호 |
43권 1호 |
| 발표분야 |
고분자가공/복합재료 |
| 제목 |
Self-Assembled Shape-Anisotropic Block Copolymer Particles from Evaporative Emulsions |
| 초록 |
Theoretical prediction and systematic modulation of shape-anisotropy of polymeric particles is of great importance in tuning their shape-dependent properties. Here, we demonstrate a precise control of aspect ratio (AR) of convex lens-shaped block copolymer (BCP) particles from the solvent evaporation-driven self-assembly of BCPs within emulsion droplet. Convex lens-shaped PS-b-P4VP particles were produced in the range of several hundred nanometers to a few microns, where the particles having a major axis diameter of 5 μm showed extremely flat shape with an AR of 15 or more. To understand the formation of anisotropic shape, a simple free energy model that embodies the competition between bulk elasticity of BCP cylinders and particle/medium interfacial energy was developed. Importantly, a deep insight into the entropic energy originating from the conformational change of the polymer chain upon particle deformation was performed according to the variation of BCP structure. |
| 저자 |
구강희1, 김용주2, 이영준2, 신재만2, 김범준2
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| 소속 |
1한국과학기술원(KAIST), 2KAIST |
| 키워드 |
block copolymer; anisotropic particle; convex lens; PS-b-P4VP; emulsion
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| E-Mail |
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