Permittivity, thermal conductivity and thermal stability of poly(vinylidene fluoride)/graphene nanocomposites

• Published in: IEEE transactions on dielectrics and electrical insulation Vol. 18; no. 2; pp. 478 - 484
• Main Authors: Yu, Jinhong, Huang, Xingyi, Wu, Chao, Jiang, Pingkai
• Format: Journal Article
• Language: English
• Published: New York IEEE 01.04.2011; The Institute of Electrical and Electronics Engineers, Inc. (IEEE)
• Subjects: Conductivity; Dielectric constant; Fluorides; Graphene; Heat transfer; Heating; Nanocomposites; Permittivity; Poly(vinylidene fluoride); Polymers; Polyvinylidene fluorides; Semiconductors; Stability analysis; Thermal conductivity; Thermal stability
• ISSN: 1070-9878; 1558-4135
• DOI: 10.1109/TDEI.2011.5739452

Poly(vinylidene fluoride) (PVDF)/graphene nanocomposites were prepared by solution blending. The incorporation of graphene sheets (GSs) increased the permittivity, thermal conductivity and thermal stability of PVDF, resulting in a transition from electrical insulator to semiconductor with a percolation threshold of 4.5 wt%. The composite containing 7.5% GSs had a permittivity higher than 300 at 1000 Hz, which is about 45 times that of pure PVDF. The thermal conductivity of the composite with 0.5% GSs was increased by approximately a factor of 2 when compared with the pure PVDF. The addition of 0.05% GSs produced an increase in the maximum decomposition temperature of PVDF of over 20°C.