Enhancement of PVDF's piezoelectricity by VGCF and MWNT

Liangke Wu, Weifeng Yuan, Takaya Nakamura, Satoshi Atobe, Ning Hu, Hisao Fukunaga, Christiana Chang, Yutaka Zemba, Yuan Li, Tomonori Watanabe, Yaolu Liu, Alamusi, Huiming Ning, Jinhua Li, Hao Cui, Yajun Zhang

Research output: Contribution to journalArticlepeer-review

22 Citations (Scopus)

Abstract

Multi-walled carbon nanotube (MWNT) and vapor grown carbon fiber (VGCF) were blended into poly (vinylidene fluoride) (PVDF) to enhance the piezoelectricity of the neat polymer. The PVDF composite films were prepared by solution casting method, stretched uniaxially and poled in silicon oil. The nanofiller contents range from 0.05 to 0.3 wt.%. Open circuit output voltage and energy harvesting tests indicate that both the PVDF/MWNT and PVDF/VGCF composite films approached the maximum output at the nanofiller content of 0.05 wt.%. Compared to the neat PVDF films, the maximum increasing rates of open circuit voltage and harvested power density are 24% and 47% for the PVDF/MWNT films and 15% and 78% for the PVDF/VGCF films, respectively. X-ray diffraction analysis showed an increase in content of the β phase in the PVDF composites; thus, the piezoelectric properties, which are dependent on β phase content, were enhanced. Stretching of the films leads to the transformation of PVDF from α phase to β phase form. Moreover, the addition of nanofillers, such as MWNT and VGCF, improves this transformation since the nanofillers provide a phase transformation nucleation function.

Original languageEnglish
Pages (from-to)49-63
Number of pages15
JournalAdvanced Composite Materials
Volume22
Issue number1
DOIs
Publication statusPublished - 2013

Keywords

  • Composite
  • Energy harvesting
  • MWNT
  • PVDF
  • Piezoelectricity
  • VGCF

ASJC Scopus subject areas

  • Ceramics and Composites
  • Mechanics of Materials
  • Mechanical Engineering

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