An ultrahigh dielectric constant composite based on polyvinylidene fluoride and polyethylene glycol modified ferroferric oxide

作者：Zhu Jiujun^*; Li Weiping; Huo Xiaoyun; Li Lili; Li Ya; Luo Laihui; Zhu Yuejin

来源：Journal of Physics D: Applied Physics , 2015, 48(35): 355301.

DOI：10.1088/0022-3727/48/35/355301

• dielectric
• nanoparticles
• surface modification
• composites

To improve the compatibility between a filler and polymer matrix, a polyethylene glycol (PEG) surface modifier was used for modification in the polyvinylidene fluoride (PVDF) and ferroferric oxide (Fe3O4) composites. It is found that the PEG-modified Fe3O4 and PVDF composites have a much higher dielectric constant and better suppressed dielectric loss than the other similar percolative systems. The maximum of the dielectric constant can be up to 63 000 while the dielectric loss is controlled below 4.5. Finally, the microscopic reasons for this improvement are presented. It is helpful to understand the influence of surface modification agents on the interfaces between the filler and matrix.

• 出版日期2015-9-9
• 单位宁波大学