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<p>To restrain the dielectric loss of polyvinylidene fluoride (PVDF) resins, and endow them with appropriate dielectric constant near the percolation threshold, a kind of Ni@NiO fillers with core-shell structure were prepared via a direct oxidation process. The Ni@NiO was then added into PVDF resin to prepare a new kind of Ni@NiO/PVDF composites. The morphologies of Ni@NiO were observed to confirm the NiO shell on the surface of the Ni@NiO particles. The dielectric constant, dissipation factor and electric conductivity of Ni@NiO/PVDF composites were also researched to explore the effect of Ni@NiO on the dielectric properties and polarization mechanism of composites. The results showed that the addition of Ni@NiO can endow Ni@NiO/PVDF composites with lower dissipation factor even at a high content of Ni@NiO compared with pure PVDF, while their dielectric constant can still satisfy the Ni@NiO/PVDF composites to be used as embedded capacitors. This phenomenon can be attributed to the NiO shell between Ni core and PVDF, the NiO shells can be served as interlayers to prevent the contact of Ni cores, thus the Ni@NiO/PVDF composites exhibit excellent dielectric properties.</p>

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Dielectric properties of polyvinylidene fluoride composites reinforced by core-shell structured Ni@NiO

  • 期刊论文

  • 发表日期：

    2025年7月2日

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  • Yuan Jia,
  • Beibei Li,
  • Jinming Fan,
  • Zhen Liu,
  • Juxiang Yang,
  • Chenyu Li

摘要

To restrain the dielectric loss of polyvinylidene fluoride (PVDF) resins, and endow them with appropriate dielectric constant near the percolation threshold, a kind of Ni@NiO fillers with core-shell structure were prepared via a direct oxidation process. The Ni@NiO was then added into PVDF resin to prepare a new kind of Ni@NiO/PVDF composites. The morphologies of Ni@NiO were observed to confirm the NiO shell on the surface of the Ni@NiO particles. The dielectric constant, dissipation factor and electric conductivity of Ni@NiO/PVDF composites were also researched to explore the effect of Ni@NiO on the dielectric properties and polarization mechanism of composites. The results showed that the addition of Ni@NiO can endow Ni@NiO/PVDF composites with lower dissipation factor even at a high content of Ni@NiO compared with pure PVDF, while their dielectric constant can still satisfy the Ni@NiO/PVDF composites to be used as embedded capacitors. This phenomenon can be attributed to the NiO shell between Ni core and PVDF, the NiO shells can be served as interlayers to prevent the contact of Ni cores, thus the Ni@NiO/PVDF composites exhibit excellent dielectric properties.