Polyvinylidene fluoride/magnetite nanocomposites Dielectric and thermal response

C. Tsonos, H. Zois, A. Kanapitsas, Navneet Soin, E. Siores, G. D. Peppas, E. C. Pyrgioti, A. Sanida, S. G. Stavropoulos, G. C. Psarras

Research output: Contribution to journalArticle

5 Citations (Scopus)

Abstract

Nanocomposites of poly (vinylidene fluoride), PVDF, and magnetite (Fe 3 O 4 ) nanoparticles were prepared using the twin screw compounding method and the effect of filler concentration (5–15 wt%) on the thermal stability, dielectric properties and dielectric strength were investigated. It was observed that the dynamic characteristics of crystalline α c -relaxation peak remain almost constant for the composites studied; while the activation energy plots almost coincide indicating that the time scale of this relaxation process is independent of the Fe 3 O 4 filler loading. Ferrite particles alter Maxwell-Wagner-Sillars (MWS) mechanism behaviour. In the isochronal diagrams of electric modulus dielectric function, at the lower ferrite concentration 5 wt% and the lowest frequency 0.1 Hz, two contributions to MWS process were clearly detected. For ferrite concentrations higher than 5 wt%, it seems that the contribution of amorphous-crystalline interfaces to the MWS relaxation drastically decreases and their effect is the broadening of the MWS peak at higher temperatures, while the effect of Fe 3 O 4 -PVDF matrix interfaces dominate in the formation of MWS relaxation. Herein, the nanocomposites dielectric strength performance was investigated by means of switching impulse high voltage stressing and AC (50 Hz) high voltage; from the results the nanocomposites demonstrated high levels of dielectrics strength accompanied with stable performance.

LanguageEnglish
Pages378-386
Number of pages9
JournalJournal of Physics and Chemistry of Solids
Volume129
DOIs
Publication statusPublished - 22 Jan 2019

Fingerprint

Ferrosoferric Oxide
Magnetite
vinylidene
magnetite
fluorides
Nanocomposites
nanocomposites
Ferrite
ferrites
fillers
Fillers
high voltages
Compounding (chemical)
Crystalline materials
compounding
Electric potential
Relaxation processes
screws
Dielectric properties
dynamic characteristics

Keywords

  • Dielectric properties
  • Differential scanning calorimetry (DSC)
  • Interfaces
  • Polymers
  • Thermogravimetric analysis (TGA)

Cite this

Tsonos, C. ; Zois, H. ; Kanapitsas, A. ; Soin, Navneet ; Siores, E. ; Peppas, G. D. ; Pyrgioti, E. C. ; Sanida, A. ; Stavropoulos, S. G. ; Psarras, G. C. / Polyvinylidene fluoride/magnetite nanocomposites Dielectric and thermal response. In: Journal of Physics and Chemistry of Solids. 2019 ; Vol. 129. pp. 378-386.
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Tsonos, C, Zois, H, Kanapitsas, A, Soin, N, Siores, E, Peppas, GD, Pyrgioti, EC, Sanida, A, Stavropoulos, SG & Psarras, GC 2019, 'Polyvinylidene fluoride/magnetite nanocomposites Dielectric and thermal response', Journal of Physics and Chemistry of Solids, vol. 129, pp. 378-386. https://doi.org/10.1016/j.jpcs.2019.01.025

Polyvinylidene fluoride/magnetite nanocomposites Dielectric and thermal response. / Tsonos, C.; Zois, H.; Kanapitsas, A.; Soin, Navneet; Siores, E.; Peppas, G. D.; Pyrgioti, E. C.; Sanida, A.; Stavropoulos, S. G.; Psarras, G. C.

In: Journal of Physics and Chemistry of Solids, Vol. 129, 22.01.2019, p. 378-386.

Research output: Contribution to journalArticle

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T1 - Polyvinylidene fluoride/magnetite nanocomposites Dielectric and thermal response

AU - Tsonos, C.

AU - Zois, H.

AU - Kanapitsas, A.

AU - Soin, Navneet

AU - Siores, E.

AU - Peppas, G. D.

AU - Pyrgioti, E. C.

AU - Sanida, A.

AU - Stavropoulos, S. G.

AU - Psarras, G. C.

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N2 - Nanocomposites of poly (vinylidene fluoride), PVDF, and magnetite (Fe 3 O 4 ) nanoparticles were prepared using the twin screw compounding method and the effect of filler concentration (5–15 wt%) on the thermal stability, dielectric properties and dielectric strength were investigated. It was observed that the dynamic characteristics of crystalline α c -relaxation peak remain almost constant for the composites studied; while the activation energy plots almost coincide indicating that the time scale of this relaxation process is independent of the Fe 3 O 4 filler loading. Ferrite particles alter Maxwell-Wagner-Sillars (MWS) mechanism behaviour. In the isochronal diagrams of electric modulus dielectric function, at the lower ferrite concentration 5 wt% and the lowest frequency 0.1 Hz, two contributions to MWS process were clearly detected. For ferrite concentrations higher than 5 wt%, it seems that the contribution of amorphous-crystalline interfaces to the MWS relaxation drastically decreases and their effect is the broadening of the MWS peak at higher temperatures, while the effect of Fe 3 O 4 -PVDF matrix interfaces dominate in the formation of MWS relaxation. Herein, the nanocomposites dielectric strength performance was investigated by means of switching impulse high voltage stressing and AC (50 Hz) high voltage; from the results the nanocomposites demonstrated high levels of dielectrics strength accompanied with stable performance.

AB - Nanocomposites of poly (vinylidene fluoride), PVDF, and magnetite (Fe 3 O 4 ) nanoparticles were prepared using the twin screw compounding method and the effect of filler concentration (5–15 wt%) on the thermal stability, dielectric properties and dielectric strength were investigated. It was observed that the dynamic characteristics of crystalline α c -relaxation peak remain almost constant for the composites studied; while the activation energy plots almost coincide indicating that the time scale of this relaxation process is independent of the Fe 3 O 4 filler loading. Ferrite particles alter Maxwell-Wagner-Sillars (MWS) mechanism behaviour. In the isochronal diagrams of electric modulus dielectric function, at the lower ferrite concentration 5 wt% and the lowest frequency 0.1 Hz, two contributions to MWS process were clearly detected. For ferrite concentrations higher than 5 wt%, it seems that the contribution of amorphous-crystalline interfaces to the MWS relaxation drastically decreases and their effect is the broadening of the MWS peak at higher temperatures, while the effect of Fe 3 O 4 -PVDF matrix interfaces dominate in the formation of MWS relaxation. Herein, the nanocomposites dielectric strength performance was investigated by means of switching impulse high voltage stressing and AC (50 Hz) high voltage; from the results the nanocomposites demonstrated high levels of dielectrics strength accompanied with stable performance.

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KW - Differential scanning calorimetry (DSC)

KW - Interfaces

KW - Polymers

KW - Thermogravimetric analysis (TGA)

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