Journal
COMPOSITES PART A-APPLIED SCIENCE AND MANUFACTURING
Volume 109, Issue -, Pages 578-584Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.compositesa.2018.03.035
Keywords
Graphene; Polymer-matrix composites (PMCs); Electrical properties; High-temperature properties
Funding
- National Natural Science Foundation of China [51573045]
- International Collaboration Research Program of Science and Technology Commission of Shanghai [16520722000]
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This study reports the synthesis and characterization of reduced polyaniline decorated reduced graphene oxide/polyimide (RGO@R-PANI/PI) nanocomposite films with enhanced dielectric properties and thermostability. The steric effects of R-PANI decorated on the surface of RGO not only prevented the aggregation of RGO but also improved the dispersion of RGO@R-PANI nanosheets in the PI matrix, leading to higher dielectric constant (e) and lower dielectric loss (tans) of the RGO@R-PANI/PI nanocomposite films than those of the RGO/PI nano composite films. The highest dielectric constant (25.84) was observed in the 20 wt% RGO@R-PANI/PI nano composite film (the mass fractions of RGO was 3.44%) with a low dielectric loss of 0.11 at 1 kHz. Furthermore, the 5 wt% weight loss temperature of the 20 wt% RGO@R-PANI/PI nanocomposite films was 480 degrees C, indicating the nanocomposite films are good candidates for dielectric materials under extreme temperature.
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