Enhanced thermal conductivity and mechanical property of flexible poly (vinylidene fluoride)/boron nitride/graphite nanoplatelets insulation films with high breakdown strength and reliability
| Autor: | Yuan Deng, Dalong He, Wei Zhu, Jingjing Feng, Qingsong Song |
|---|---|
| Rok vydání: | 2018 |
| Předmět: |
Materials science
Composite number General Engineering Thermal grease 02 engineering and technology 010402 general chemistry 021001 nanoscience & nanotechnology 01 natural sciences 0104 chemical sciences chemistry.chemical_compound Thermal conductivity chemistry Boron nitride Thermal Ultimate tensile strength Ceramics and Composites Graphite Composite material 0210 nano-technology Fluoride |
| Zdroj: | Composites Science and Technology. 168:381-387 |
| ISSN: | 0266-3538 |
| DOI: | 10.1016/j.compscitech.2018.10.015 |
| Popis: | Owing to the integration of power electronic devices and the development of flexible devices, demands for high quality thermal conductive composites have substantially increased. Thus highly flexible poly (vinylidene fluoride)/boron nitride (i.e. PVDF/BN-x) composite films were prepared in this work, and a low quantity of graphite nanoplatelets (GNP) was added to simultaneously improve the thermal and mechanical properties of the film (i.e. PVDF/BN-30/GNP-y). The synergistic effect of the two fillers has been discussed, and results show that the thermal conductivity of PVDF/BN-30/GNP-2.5 reaches up to 0.720 Wm−1K−1 compared with 0.634 Wm−1K−1 of PVDF/BN-30. And the tensile strength is also increased from 12.43 MPa to 20.21 MPa, which has been improved by 63%. In addition, the experiment results validate that the films possess high electrical insulation and satisfactory breakdown strength, which proves its applicability to high-voltage environment. Besides, the thermal conductivity of films can be preserved after 300 thermal shocks with extreme temperature changes. This study provides a kind of flexible thermal interface material with excellent comprehensive properties for application in field of power electronics. |
| Databáze: | OpenAIRE |
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