Twistable and bendable actuator: a CNT/polymer sandwich structure driven by thermal gradient |
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Authors: | Seo Dong Kyun Kang Tae June Kim Dae Weon Kim Yong Hyup |
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Affiliation: | School of Mechanical and Aerospace Engineering, Seoul National University Gwanak-ro 599, Sillim-dong, Kwanak-gu, Seoul 151-742, Republic of Korea. |
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Abstract: | We demonstrate a novel configuration of an electrothermal actuator (ETA), which is based on a polydimethylsiloxane (PDMS) slab sandwiched by upper and lower active layers of CNT-PDMS composite. When only one active layer of a single sandwich structure ETA is heated and the other is not, there exists a thermal gradient in the direction of the slab thickness, resulting in bending motion toward the unheated side. Moreover, a dual sandwich structure ETA, consisting of two parallel assembled sandwich structures on the same body, has the unique ability to act with a twisting motion as the two ETAs bend in opposite directions. We expect the advent of the bendable and twistable actuator to break new ground in ETAs. |
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