Effects of Graphene on the Mechanical and Dielectric Properties of Al2O3/ Polyimide Films
In order to improve the comprehensive performance of Polyimide (PI) film in practice, the comparison tests were conducted to study the effects of graphene oxide and Al2O3 nanoparticles on the performance of PI films. One group added Al2O3 particles with mass fractions of 0%, 0.5%, and 1% to the PI f...
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| Main Authors: | , , , , , , |
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| Format: | Article |
| Language: | zho |
| Published: |
Harbin University of Science and Technology Publications
2020-02-01
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| Series: | Journal of Harbin University of Science and Technology |
| Subjects: | |
| Online Access: | https://hlgxb.hrbust.edu.cn/#/digest?ArticleID=1832 |
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| Summary: | In order to improve the comprehensive performance of Polyimide (PI) film in practice, the comparison tests were conducted to study the effects of graphene oxide and Al2O3 nanoparticles on the performance of PI films. One group added Al2O3 particles with mass fractions of 0%, 0.5%, and 1% to the PI film. The other group added graphene oxide with mass fractions of 0.2%, 0.4%, 0.6%, 0.8%, and 1% to the 1% Al2O3/PI film. The thermal stability, tensile strength, fracture morphology, dielectric spectrum, and breakdown field strength of the different composition films were characterized. The results show that the increase of Al2O3 nanoparticle content in PI leads to a significant decrease in the thermal stability of the film above 400 °C. The addition of graphene oxide can significantly improve the thermal stability of Al2O3/PI film. The addition of γAl2O3 can increase the mechanical properties of the composite film. The addition of graphene oxide increases the dielectric constant of the composite film, but has little effect on the electrical conductivity of the film. The dielectric loss tangent of the film decreases first and then increases with the increase of graphene oxide content, and it is the smallest when the graphene oxide mass fraction is 0.6%. In addition, the addition of graphene oxide significantly improves the breakdown field strength of the Al2O3/PI film. |
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| ISSN: | 1007-2683 |