Preparation and characterization of thermoplastic composite based on poly(vinylidene fluoride) and multiwalled carbon nanotube

Gwang Ho Kim, Ji Seok Lee, Chong Min Koo, Soon Man Hong

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4 Citations (Scopus)

Abstract

We investigated the interrelationships among the crystal structures and the physical/ferroelectric/piezoelectric/rheological properties of a thermoplastic composite based on poly(vinylidene fluoride) (PVDF)/carbon nano tube (CNT). The composite was prepared by solution blending and the composite films were formed by hot-pressing. The contents of CNT were from 0.001 wt% to 3 wt%. To induce piezoelectric β-form crystal structure, the composite films were drawn by 400% elongation. The samples were poled at high voltage and high temperature for polarization of the film. The β-form crystal increased with CNT contents, passing through a peak, and decreased. The structural changes depended on the CNT contents, drawing and poling conditions. The maximum amount of β-crystal could be produced by optimum conditions in this study. The drawn and poled PVDF/CNT (0.2 wt%) composite film had the highest value of piezoelectricity. In the rheological properties, dynamic viscosity, the extent of shear thinning behaviors and relaxation time were increased with the CNT content.

Original languageEnglish
Pages (from-to)507-518
Number of pages12
JournalComposite Interfaces
Volume16
Issue number4
DOIs
Publication statusPublished - 2009 Jul 1
Externally publishedYes

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Keywords

  • Carbon nano tube
  • Piezoelectric properties
  • Poly(vinylidene fluoride)
  • Thermoplastic composite

ASJC Scopus subject areas

  • Ceramics and Composites
  • Physics and Astronomy(all)
  • Surfaces, Coatings and Films

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