Free volume dependence of the dielectric constant of poly(vinylidene fluoride) nanocomposite films

Lei Yang, Xuyang Liu, Zhouxun Lu, Tong Song, Zhihong Yang, Jianmei Xu, Wei Zhou, Xingzhong Cao, Runsheng Yu, Qing Wang

Research output: Contribution to journalArticlepeer-review

6 Scopus citations

Abstract

The free volume effects on the dielectric properties of the polymer are ambiguous, and the quantitative effect of free volume on the dielectric properties has rarely been systematically studied, especially in the high-elastic state dipolar (HESD) polymer. In this work, the free volume of dipolar poly(vinylidene fluoride) (PVDF) is regulated by the addition of Al2O3, which greatly increase the size of free volume holes. Then the effect of free volume on the dielectric properties of PVDF/Al2O3 composites is discussed. The greatly enlarged size of free volume holes is believed to potentially generate disparate effects on dielectric constant under different frequencies in such kinds of HESD polymer-based composites, bringing about more remarkable frequency dependence of the dielectric constant. The influence of atomic-scale microstructure based on free volume further clarifies the free volume effects on the dielectric properties and provides valuable insights for the research of dielectric behaviour of polymer composites, which is constructive to design novel dielectric materials and further optimize the dielectric properties of dipolar dielectric polymer composites.

Original languageEnglish (US)
Pages (from-to)24734-24742
Number of pages9
JournalRSC Advances
Volume12
Issue number38
DOIs
StatePublished - Aug 31 2022

All Science Journal Classification (ASJC) codes

  • General Chemistry
  • General Chemical Engineering

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