Polymer based LaFeO3-Poly(vinylidene fluoride) hybrid nanocomposites: Enhanced magneto-electric coupling, magnetoimpedance and dielectric response

2019 ◽  
Vol 806 ◽  
pp. 968-975 ◽  
Author(s):  
Debajyoti Nath ◽  
S.K. Mandal ◽  
A. Nath
Keyword(s):  
Dielectric Response ◽  
Vinylidene Fluoride ◽  
Hybrid Nanocomposites ◽  
Electric Coupling ◽  
Poly Vinylidene Fluoride

scholarly journals Electroactive γ-Phase, Enhanced Thermal and Mechanical Properties and High Ionic Conductivity Response of Poly (Vinylidene Fluoride)/Cellulose Nanocrystal Hybrid Nanocomposites

Materials ◽  
2020 ◽  
Vol 13 (3) ◽  
pp. 743
Author(s):  
Erlantz Lizundia ◽  
Ander Reizabal ◽  
Carlos M. Costa ◽  
Alberto Maceiras ◽  
Senentxu Lanceros-Méndez
Keyword(s):  
Ionic Conductivity ◽  
Vinylidene Fluoride ◽  
Mechanical Performance ◽  
Dielectric Behavior ◽  
Hybrid Nanocomposites ◽  
Thermal And Mechanical Properties ◽  
Oh Groups ◽  
Poly Vinylidene Fluoride ◽  
Relevant Role

Cellulose nanocrystals (CNCs) were incorporated into poly (vinylidene fluoride) (PVDF) to tailor the mechanical and dielectric properties of this electroactive polymer. PVDF/CNC nanocomposites with concentrations up to 15 wt.% were prepared by solvent-casting followed by quick vacuum drying in order to ensure the formation of the electroactive γ-phase. The changes induced by the presence of CNCs on the morphology of PVDF and its crystalline structure, thermal properties, mechanical performance and dielectric behavior are explored. The results suggest a relevant role of the CNC surface −OH groups, which interact with PVDF fluorine atoms. The real dielectric constant ε’ of nanocomposites at 200 Hz was found to increase by 3.6 times up to 47 for the 15 wt.% CNC nanocomposite due to an enhanced ionic conductivity provided by CNCs. The approach reported here in order to boost the formation of the γ-phase of PVDF upon the incorporation of CNCs serves to further develop cellulose-based multifunctional materials.

scholarly journals Mechano-electric coupling in P(VDF–TrFE)/spin crossover composites

2020 ◽  
Vol 8 (18) ◽  
pp. 6042-6051 ◽  
Author(s):  
Mario Piedrahita-Bello ◽  
Baptiste Martin ◽  
Lionel Salmon ◽  
Gábor Molnár ◽  
Philippe Demont ◽  
...  
Keyword(s):  
Energy Harvesting ◽  
Spin Crossover ◽  
Vinylidene Fluoride ◽  
Electric Coupling ◽  
Poly Vinylidene Fluoride

Spin crossover particles dispersed in a piezo/ferroelectric poly(vinylidene fluoride-co-trifluoro-ethylene), P(VDF–TrFE), matrix give rise to inspiring mechano-electric phenomena, with possible applications for energy harvesting and sensing.

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