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  • 09월 04일 13시 이후 : 초록수정 불가능, 일정확인 및 검색만 가능

Behavior of carbon nanotubes in a shear flow : Simulation studies

등록일
2009년 8월 14일 15시 23분 25초
접수번호
1182
발표코드
34P216포 이곳을 클릭하시면 발표코드에 대한 설명을 보실 수 있습니다.
발표시간
목 <발표Ⅰ>
발표형식
포스터
발표분야
물리화학
저자 및
공동저자
권계민, 신관우1, 성봉준
서강대학교 화학과, Korea
1서강대학교 화학과 및 바이오융합과정, Korea
The influence of the shear on the percolation network of carbon nanotubes (CNT) in CNT/polymer composites is studied using Monte Carlo (MC) simulations and a percolation theory. The percolation behavior of CNTs is crucial to electrical conductivity of CNT/polymer composites, which has been considered a promising material in various applications. It has been well known that the shear has deteriorated the percolation behavior of CNTs significantly. In this work, the shear, which is mimicked in simulations by implementing the biased potential, is exerted on the composite of CNTs and polymers confined between two hard walls. Upon the imposition of shear, CNTs lie parallel to the shear direction and their distribution within the composite is also altered significantly. After a certain amount of time, however, the shear leads the CNTs to get entangled forming clusters of CNTs, which breaks down the percolating network of CNTs, if any, and decreases the electric conductivity of the composite. We carry out MC simulations extensively changing the shear rate, the CNT aspect ratio, and the CNT concentration and obtain a pseudo-phase diagram for the cluster formation.

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