Electrothermal composite material and electrothermal actuator using the same
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United States of America Patent
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Jan 16, 2018
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Jun 30, 2015
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Jul 23, 2014
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Abstract
An electrothermal composite material includes a flexible polymer layer and a carbon nanotube paper stacked on the flexible polymer layer. The carbon nanotube paper is at least partly embedded into the flexible polymer layer. A thickness ratio of the carbon nanotube paper and the flexible polymer layer is in a range from about 1:7 to about 1:10. A density of the carbon nanotube paper is greater than or equal to 0.5 g/cm3. A thermal expansion coefficient of the carbon nanotube paper is greater than or equal to ten times that of the flexible polymer layer. A conductivity of the carbon nanotube paper along a first direction is in a range from about 1000 S/m to about 6000 S/m. An electrothermal actuator is also provided.
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