Publication detail

Comparative Study of PVDF Sheets and Their Sensitivity to Mechanical Vibrations: The Role of Dimensions, Molecular Weight, Stretching and Poling

MRLÍK, M. OSIČKA, J. CVEK, M. ILČÍKOVÁ, M. SRNEC, P. GORGOL, D. TOFEL, P.

Original Title

Comparative Study of PVDF Sheets and Their Sensitivity to Mechanical Vibrations: The Role of Dimensions, Molecular Weight, Stretching and Poling

Type

journal article in Web of Science

Language

English

Original Abstract

This paper is focused on the comparative study of the vibration sensing capabilities of poly(vinylidene fluoride) (PVDF) sheets. The main parameters such as molecular weight, initial sample thickness, stretching and poling were systematically applied, and their impact on sensing behavior was examined. The mechanical properties of prepared sheets were investigated via tensile testing on the samples with various initial thicknesses. The transformation of the α-phase to the electro-active β-phase was analyzed using FTIR after applying stretching and poling procedures as crucial post-processing techniques. As a complementary method, the XRD was applied, and it confirmed the crystallinity data resulting from the FTIR analysis. The highest degree of phase transformation was found in the PVDF sheet with a moderate molecular weight (Mw of 275 kDa) after being subjected to the highest axial elongation (500%); in this case, the β-phase content reached approximately 90%. Finally, the vibration sensing capability was systematically determined, and all the mentioned processing/molecular parameters were taken into consideration. The whole range of the elongations (from 50 to 500%) applied on the PVDF sheets with an Mw of 180 and 275 kDa and an initial thickness of 0.5 mm appeared to be sufficient for vibration sensing purposes, showing a d33 piezoelectric charge coefficient from 7 pC N−1 to 9.9 pC N−1. In terms of the d33, the PVDF sheets were suitable regardless of their Mw only after applying the elongation of 500%. Among all the investigated samples, those with an initial thickness of 1.0 mm did not seem to be suitable for vibration sensing purposes.

Keywords

poly(vinylidene fluoride); crystallinity; physical properties; vibration sensing; d33

Authors

MRLÍK, M.; OSIČKA, J.; CVEK, M.; ILČÍKOVÁ, M.; SRNEC, P.; GORGOL, D.; TOFEL, P.

Released

22. 6. 2021

Publisher

MDPI

Location

SWITZERLAND

ISBN

2079-4991

Periodical

Nanomaterials

Year of study

11

Number

7

State

Swiss Confederation

Pages from

1

Pages to

11

Pages count

11

URL

https://www.mdpi.com/2079-4991/11/7/1637/htm

Full text in the Digital Library

http://hdl.handle.net/11012/200953

BibTex

@article{BUT172184,
  author="Miroslav {Mrlík} and Josef {Osička} and Martin {Cvek} and Markéta {Ilčíková} and Peter {Srnec} and Danila {Gorgol} and Pavel {Tofel}",
  title="Comparative Study of PVDF Sheets and Their Sensitivity to Mechanical Vibrations: The Role of Dimensions, Molecular Weight, Stretching and Poling",
  journal="Nanomaterials",
  year="2021",
  volume="11",
  number="7",
  pages="1--11",
  doi="10.3390/nano11071637",
  issn="2079-4991",
  url="https://www.mdpi.com/2079-4991/11/7/1637/htm"
}