期刊
出版社
ELSEVIER
DOI: 10.1016/j.mseb.2021.115280
关键词
Dielectric performance; Carbon nanotubes; Barium titanate; Hybrid particles
资金
- National Natural Science Foundation of China [51903133]
- Key Technology Research and Development Program of Shandong [2019GGX103030]
- Postdoctoral Research Foundation of China [2019 M652342]
- Project of Shandong Province Higher Educational Science and Technology Program [J18KA005]
Two kinds of hybrid particles, BT@CNT and CNT@BT, were prepared by chemical bonding in the presence of silane, and their effects on the microstructure and dielectric performance of the composites were studied. The BT@CNT hybrid filler improves dielectric permittivity, while the CNT@BT hybrid filler excels in suppressing dielectric loss.
In this study, two kinds of hybrid particles named as BT@CNT and CNT@BT were prepared by chemical bonding between barium titanates and two types of carboxyl-functionalized multi-walled carbon nanotubes with different structural parameters in the presence of silane as a coupling agent. The effects of structures of hybrid particles on microstructure and dielectric performance of the obtained composites were studied. Herein, the BT@CNT hybrid filler aids in improving the dielectric permittivity and the CNT@BT hybrid filler has a main advantage in suppressing the dielectric loss (Dielectric permittivity 300-573 and loss 39.5-6.9 for BT@CNT/PDMS, Dielectric permittivity 65-120 and loss 1.5-0.75 for CNT@BT/PDMS at 100 Hz). Additionally, the dielectric performances of the composites can be manipulated by controlling the hybrid fillers structure and the hybrid ratio. In sum, this work looks promising for the fabrication of property-tailored materials for wide applications in electrostatic capacitors, embedded devices and charge storage device in future.
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