期刊
COMPOSITES SCIENCE AND TECHNOLOGY
卷 171, 期 -, 页码 152-161出版社
ELSEVIER SCI LTD
DOI: 10.1016/j.compscitech.2018.12.022
关键词
Nano composites; Electrical properties; Magnetic properties
资金
- National Science Foundation of China [51407087, 51603098]
- Natural Science Foundation of Shandong Province [BS2015NJ013]
- Start-up Funds for Doctors of Liaocheng University [318051503]
- Research Project of Liaocheng University [318011603]
- China Scholarship Council
Percolative poly(vinylidene fluoride) (PVDF) composites with high dielectric constant and low dielectric loss was successfully achieved by incorporating reduced graphene oxide (rGO) decorated with magnetic iron oxide (Fe3O4) (rGO@Fe3O4) nano-fillers. The morphology, structure, thermal, electrical and magnetic properties of the composites were investigated systematically by using SEM, XRD, FTIR, TGA, DSC, impedance analyzer and magnetometer, respectively. The presence of a tiny amount of poly(sodium 4-styrene sulfonate) (PSSNa) facilitated the homogeneous distribution of rGO@Fe3O4 nanoparticles and prevented the formation of an electrical conductive network within the PVDF matrix, resulting in an excellent dielectric performance of the rGO@Fe3O4/PVDF nano-composites. With 1.0 wt% rGO@Fe3O4 incorporated in PVDF, the nanocomposite exhibited a high dielectric constant of 1297 and a low dielectric loss of 0.26 at 100 Hz. Percolation model revealed that such improvements could be attributed to the synergistic effect of the inorganic Fe3O4 and rGO, whereby the electric charges were accumulated by forming many mini-capacitors in the bulk PVDF matrix. The structure-property behavior of the final nanocomposites was discussed.
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