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Room-Temperature Switching Behavior in CNT/Hexadecane Composites

Published online by Cambridge University Press:  16 July 2018

Yulong Wu,
Peng Meng,
Quan Zhang,
Zhiyuan Tan,
Guoan Cheng,
Xiaoling Wu and
Ruiting Zheng
Yulong Wu
Affiliation:
Key Laboratory of Radiation Beam Technology and Materials Modification of Ministry of Education, College of Nuclear Science and Technology, Beijing Normal University, Beijing 100875, P. R. China
Peng Meng
Affiliation:
Key Laboratory of Radiation Beam Technology and Materials Modification of Ministry of Education, College of Nuclear Science and Technology, Beijing Normal University, Beijing 100875, P. R. China
Quan Zhang
Affiliation:
Key Laboratory of Radiation Beam Technology and Materials Modification of Ministry of Education, College of Nuclear Science and Technology, Beijing Normal University, Beijing 100875, P. R. China
Zhiyuan Tan
Affiliation:
Key Laboratory of Radiation Beam Technology and Materials Modification of Ministry of Education, College of Nuclear Science and Technology, Beijing Normal University, Beijing 100875, P. R. China
Guoan Cheng
Affiliation:
Key Laboratory of Radiation Beam Technology and Materials Modification of Ministry of Education, College of Nuclear Science and Technology, Beijing Normal University, Beijing 100875, P. R. ChinaBeijing Radiation Center, Beijing 100875, P. R. China
Xiaoling Wu
Affiliation:
Key Laboratory of Radiation Beam Technology and Materials Modification of Ministry of Education, College of Nuclear Science and Technology, Beijing Normal University, Beijing 100875, P. R. ChinaBeijing Radiation Center, Beijing 100875, P. R. China
Ruiting Zheng*
Affiliation:
Key Laboratory of Radiation Beam Technology and Materials Modification of Ministry of Education, College of Nuclear Science and Technology, Beijing Normal University, Beijing 100875, P. R. ChinaBeijing Radiation Center, Beijing 100875, P. R. China
*
*(Email: rtzheng@bnu.edu.cn)
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Abstract

The room-temperature switching effect is of great interest for many applications, such as smart buildings, sensors, thermal energy storage and automatic temperature control. In this paper, we report a room-temperature switchable carbon nanotube (CNT)/hexadecane composites. Electrical conductivity, thermal conductivity and permittivity of the CNT/hexadecane composites can be regulated around 18°C and the maximal switching ratio reaches 5 orders of magnitude, 3 times and 106.4, respectively. The switching behavior of composites is caused by rearrangement of the carbon nanotube fillers in hexadecane matrix during liquid-solid phase transition. It is found that surface modification is necessary to improve dispersion stability. Effects of filler properties on switching behaviour are also discussed.

Keywords

compositedielectric propertieselectrical propertiesthermal conductivity

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Type
Articles
Information
MRS Advances , Volume 3 , Issue 54: Energy Materials and Technologies , 2018, pp. 3213 - 3220
Copyright
Copyright © Materials Research Society 2018 

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