Preparation of Fe₃O₄-carbon black/poly(vinylidene fluoride) composites with enhanced properties

Abstract

In this work, the Fe₃O₄-carbon black filler was obtained from an in-situ coprecipitation method followed by the modification of the heptadecafluorodecyltrimethoxysilane and the Fe₃O₄-carbon black/poly(vinylidene fluoride) (PVDF) composites with enhanced properties were prepared by a simple solution blending-water precipitating method. The Fe₃O₄-carbon black distributed well in the PVDF matrix, which was confirmed by the SEM. According to the results of FTIR and WAXD, a lot of useful polar crystalline phases of PVDF formed in the Fe₃O₄-carbon black/PVDF composites. The electrically conductive ability, the dielectric permittivity, the dielectric loss factor, and the magnetic saturation value of the Fe₃O₄-carbon black/PVDF composite increased with the increasing loading amount of Fe₃O₄-carbon black filler. Especially, when the Fe₃O₄-carbon black was 5 wt.%, the dielectric permittivity of Fe₃O₄-carbon black/PVDF composite reached as high as 23.5 at 1000 Hz with a relatively low dielectric loss factor value of 0.38 and a magnetic saturation value of 0.64 emu/g.

Keywords:

• Poly(vinylidene fluoride)
• Fe₃O₄-carbon black filler
• crystallization behavior
• magnetic property
• electrical and dielectric properties

Disclosure statement

No potential conflict of interest was reported by the authors.

Additional information

Funding

The authors would like to acknowledge the support of the Guangdong province natural science foundation, China (2022A1515010475), the professorial and doctoral scientific research foundation of Huizhou University, China (2018JB001), and the Dr. Jing-Shui Xu and Mr. Zi-Yun Xu for their help in revising the paper.