Realizing enhanced dielectric and mechanical performance of polyvinylidene fluoride/SiC nanocomposites through a bio-inspired interface design

Research output: Journal Publications and ReviewsRGC 21 - Publication in refereed journalpeer-review

23 Scopus Citations
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Author(s)

  • Yi-zhang Tong
  • Wan-jing Zhao
  • Dong-li Zhang
  • Guang-jian He
  • Zhi-tao Yang
  • Xian-wu Cao

Detail(s)

Original languageEnglish
Pages (from-to)263–277
Journal / PublicationAdvanced Composites and Hybrid Materials
Volume5
Issue number1
Online published31 Aug 2021
Publication statusPublished - Mar 2022

Abstract

The incorporation of high-dielectric permittivity ceramic or conductive fillers into the polymer is an effective method to obtain flexible high-performance dielectric materials, but it is still a huge challenge to achieve a balance between dielectric and mechanical properties. In this paper, we report a polyvinylidene fluoride (PVDF) nanocomposite based on a novel crab leg-like filler, in which Ag nanoparticles (AgNPs) were decorated on the surface of polydopamine (PDA)-coated silicon carbide (SiC) nanowhiskers (NWs). Compared with the nanocomposites with as-received SiC, this PVDF/SiC@PDA@Ag nanocomposites exhibited significantly suppressed dielectric loss (0.03 at 1 kHz) and leakage current. The Argant plot (ε- ε curve) and electric modulus analysis demonstrated that the inhibition of the organic layer of PDA to interface polarization and the coulomb-blockade effect of AgNPs hindered carrier transport, which resulted in the largely suppressed dielectric loss. Furthermore, while the dielectric properties were improved, the PVDF/SiC@PDA@Ag nanocomposites also exhibited excellent mechanical and thermal conductivity. Ultimately, the nanocomposites prepared via this method are promising for applications in microelectronic devices. 

Research Area(s)

  • Dielectric properties, Interface design, Mechanical properties, Polyvinylidene fluoride, SiC nanocomposites

Citation Format(s)

Realizing enhanced dielectric and mechanical performance of polyvinylidene fluoride/SiC nanocomposites through a bio-inspired interface design. / Tong, Yi-zhang; Zhao, Wan-jing; Wu, Wei et al.
In: Advanced Composites and Hybrid Materials, Vol. 5, No. 1, 03.2022, p. 263–277.

Research output: Journal Publications and ReviewsRGC 21 - Publication in refereed journalpeer-review