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Tailoring Core-Shell Polymer Coated Nanoparticles as Block Copolymer Surfactants

등록일
2009년 8월 4일 16시 48분 05초
접수번호
0049
발표코드
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발표시간
금 15시 : 50분
발표형식
심포지엄
발표분야
고분자화학 - Novel Functional Nanostructures: ㅡ Materials, Structures, Properties and Applications Ⅱ
저자 및
공동저자
김범준
한국과학기술원 생명화학공학과, Korea
The effect of core-shell polymer coated nanoparticles on block copolymer morphology is investigated systematically by controlling particle positioning within a block copolymer template. Our approach of varying the areal chain density of short thiol terminated polystyrene brushes on the particles is used to control the fraction of the particles adsorbed to the interface of PS-b-P2VP diblock copolymer domains. Interestingly, the addition of low volume fractions of the nanoparticle surfactants to lamellar diblock copolymers initially leads to a decrease in lamellar thickness, a consequence of decreasing interfacial tension, up to a critical value of the particle volume fraction beyond which the block copolymer adopts a bicontinuous morphology.. The relationship between domain spacing and morphology of block copolymer with the level of nanoparticle surfactants will be discussed based on a strong-segregation model. I thank my collaborators G. H. Fredrickson, J. Bang, C. J. Hawker, and E. J. Kramer.

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