Mechanical fatigue resistance of piezoelectric PVDF polymers

Youn Hwan Shin, Inki Jung, Hyunchul Park, Jung Joon Pyeon, Jeong Gon Son, Chong Min Koo, Sangtae Kim, Chong Yun Kang

Research output: Contribution to journalArticle

3 Citations (Scopus)

Abstract

The fatigue resistance of piezoelectric PVDF has been under question in recent years. While some report that a significant degradation occurs after 106 cycles of repeated voltage input, others report that the reported degradation originates from the degraded metal electrodes instead of the piezoelectric PVDF itself. Here, we report the piezoelectric response and remnant polarization of PVDF during 107 cycles of repeated compression and tension, with silver paste-based electrodes to eliminate any electrode effect. After applying repeated tension and compression of 1.8% for 107 times, we do not observe any notable decrease in the output voltage generated by PVDF layers. The results from tension experiments show stable remnant polarization of 5.5 μC/cm2, however, the remnant polarization measured after repeated compression exhibits a 7% decrease as opposed to the tensed PVDF. These results suggest a possible anisotropic response to stress direction. The phase analyses by Raman spectroscopy reveals no significant change in the phase content, demonstrating the fatigue resistance of PVDF.

Original languageEnglish
Article number503
JournalMicromachines
Volume9
Issue number10
DOIs
Publication statusPublished - 2018

Keywords

  • Ferroelectric
  • Mechanical fatigue resistance
  • PVDF
  • Piezoelectric
  • Remnant polarization

ASJC Scopus subject areas

  • Control and Systems Engineering
  • Mechanical Engineering
  • Electrical and Electronic Engineering

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