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Permittivity enhancement of transparent poly(vinylidene fluoride) nanocomposite films by loading titania-coated barium titanate nanoparticles

  • Jun Kanazawa
  • Tsuyoshi Kanamori
  • Masaki Sato
  • Haruyuki Ishii
  • Mikio Konno
  • Daisuke Nagao
Research Paper
  • 146 Downloads

Abstract

Barium titanate (BT) nanoparticles are coated by titania and modified by fluoroalkylsilane. The BT nanoparticles are incorporated into polyvinylidene fluoride (PVDF) films to obtain highly dielectric and transparent nanocomposite films at low filler loadings. Incorporation of BT nanoparticles having average sizes of 12 and 22 nm is performed. Incorporation of BT nanoparticles enhances the permittivity of PVDF films. Higher transparency of nanocomposite films is achieved by incorporating 12-nm nanoparticles compared to that by 22-nm nanoparticles. The polarisation mechanism in the nanocomposite films is examined using the Vo–Shi model. The result indicates that even a slight increase in the thickness of titania-coating layer on the BT nanoparticles increase the permittivity of the nanocomposite films. Comparison of the measured and calculated permittivities showed that the incorporation of BT nanoparticles coated with titania provides a practical approach to create transparent nanocomposite films having high permittivity.

Graphical abstract

Keywords

Barium titanate Coating Permittivity Titania Thin film Polymers 

Notes

Funding information

This research was mainly supported by the Ministry of Education, Culture, Sports, Science and Technology (JSPS KAKENHI Grant Number 26286019 and 17K19020).

Compliance with ethical standards

Conflict of interest

The authors declare that they have no conflict of interest.

Supplementary material

11051_2018_4289_MOESM1_ESM.pdf (412 kb)
ESM 1 (PDF 412 kb)

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Copyright information

© Springer Nature B.V. 2018

Authors and Affiliations

  1. 1.Department of Chemical Engineering, Graduate School of EngineeringTohoku UniversitySendaiJapan

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