Room-Temperature Switching Behavior in CNT/Hexadecane Composites
| Autor: | Yulong Wu, Quan Zhang, Xiaoling Wu, Zhiyuan Tan, Peng Meng, Guoan Cheng |
|---|---|
| Rok vydání: | 2018 |
| Předmět: |
Permittivity
Materials science Orders of magnitude (temperature) Mechanical Engineering 02 engineering and technology Carbon nanotube Hexadecane 010402 general chemistry 021001 nanoscience & nanotechnology Condensed Matter Physics 01 natural sciences 0104 chemical sciences law.invention chemistry.chemical_compound Thermal conductivity chemistry Mechanics of Materials law Electrical resistivity and conductivity Dispersion stability Surface modification General Materials Science Composite material 0210 nano-technology |
| Zdroj: | MRS Advances. 3:3213-3220 |
| ISSN: | 2059-8521 |
| Popis: | 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. |
| Databáze: | OpenAIRE |
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