탄소나노튜브 복합재를 이용한 고분자 액추에이터의 냉각 개선
Enhanced Cooling Performance of Polymer Actuators Using Carbon Nanotube Composites
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초록
낚싯줄이나 재봉실을 꼬아서 만드는 코일형 고분자 액추에이터는 열을 가하거나 냉각하면 수축하거나 늘어나면서 작동을 하게 된다. 따라서, 코일형 고분자 액추에이터의 동작 속도는 가열 및 냉각 속도에 매우 민감하게되는 문제가 있다. 코일형 고분자 액추에이터의 동작 속도를 개선하기 위해서, 폴리디메틸실록산 복합재를 액추에이터에 코팅하였다. 폴리디메틸실록산에 다중벽 탄소나노튜브를 혼합함으로써, 액추에이터의 동작 속도를 약 13% 개선하였다.
Abstract
Coiled polymer actuators fabricated by twisting polymer fishing lines or sewing threads respond to heating and cooling with their contraction and relaxation. However, their actuation speed is highly dependent on the heating and cooling rates. In order to improve the actuation speed, the coiled polymer actuator was coated with polydimethylsiloxane composites. The introduction of multi-walled carbon nanotubes into the polydimethylsiloxane improved the actuation speed by about 13%.
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