SIMULATING THE EFFECTS OF POROSITY ON THE D31PIEZOELECTRIC COEFFICIENT OF POLYVINYLIDENE FLUORIDE

Jack Kloster, Matthew Danley, Tony Struntz, Victor Lai, Ping Zhao

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

A piezoelectric, thin film polyvinylidene fluoride (PVDF) material was developed for application as a blood pressure/flow sensor within an artificial heart. In an effort to increase the piezoelectric coefficient, d31, and maximize the sensitivity of the PVDF material, nanoscale pores were introduced into the thin films. The purpose of the pores was to increase the mechanical strain of the material under compressive loading, and thus increase the charge separation and piezoelectric coefficient. Strain tracking under tensile loading was performed to determine the elastic modulus and Poisson's ratio of the PVDF material, which were then used to model a simulated material in COMSOL Multiphysics software. Simulations were run to determine the d31 piezoelectric coefficient of the material, and the simulated results were compared with experimental results from a previous study. As porosity of the PVDF films increased, the experimental results showed an increase in d31 from 21.3 pC/N to 51.3 pC/N, or 141%. The simulated results showed an increase in d31 from 16.7 pC/N to 47.2 pC/N, or 183%. The similarity between previous experimental results and novel simulated results suggests that the simulated model used is a reliable method for estimating d31 of PVDF.

Original languageEnglish (US)
Title of host publicationProceedings of ASME 2022 Conference on Smart Materials, Adaptive Structures and Intelligent Systems, SMASIS 2022
PublisherAmerican Society of Mechanical Engineers
ISBN (Electronic)9780791886274
DOIs
StatePublished - 2022
EventASME 2022 Conference on Smart Materials, Adaptive Structures and Intelligent Systems, SMASIS 2022 - Dearborn, United States
Duration: Sep 12 2022Sep 14 2022

Publication series

NameProceedings of ASME 2022 Conference on Smart Materials, Adaptive Structures and Intelligent Systems, SMASIS 2022

Conference

ConferenceASME 2022 Conference on Smart Materials, Adaptive Structures and Intelligent Systems, SMASIS 2022
Country/TerritoryUnited States
CityDearborn
Period9/12/229/14/22

Bibliographical note

Funding Information:
This work is funded by the University of Minnesota’s Grant-in-Aid of Research, Artistry, and Scholarship program.

Publisher Copyright:
Copyright © 2022 by ASME.

Keywords

  • piezoelectric polymer
  • porosity
  • PVDF
  • simulation
  • strain tracking

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