화학공학소재연구정보센터
학회 한국고분자학회
학술대회 2019년 가을 (10/09 ~ 10/11, 제주컨벤션센터)
권호 44권 2호
발표분야 기능성 고분자
제목 Onion-like Photonic Shells of Cholesteric Liquid Crystals created by Liquid-Liquid Phase Separation
초록 Cholesteric liquid crystals (CLCs) have a helical superstructure which exhibits selective reflection color due to periodic modulation of refractive index. The reflection color of CLCs highly relies on the shape of the confinement and anchoring boundary. The onion-like shell has a round surface and at least two tangentially anchored boundaries. Thus the spherical confinement is an optimum configuration for the rotation independence optical properties of CLCs. However, it is challenging to form an onion-like spherical shell. Here, we suggest a facile production of an onion-like photonic shell containing CLCs through liquid-liquid phase separation. One phase ternary mixture of a hydrophobic CLCs, co-solvent, and a hydrophilic solvent is emulsified into water stream through a microfluidic method. When the ternary mixture in the single-emulsion drops reaches equilibrium by mass transfer, liquid-liquid phase separation occurs, and onion-like shells are created.
저자 박시훈1, 이상석2, 김신현1
소속 1한국과학기술원, 2한국과학기술(연)
키워드 cholesteric liquid crystals; photonic shells; multiple emulsion; liquid-liquid phase separation
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