Chinya, Ipsita and Pal, Avijit and Sen, Shrabanee (2017) Polyglycolated zinc ferrite incorporated poly(vinylidene fluoride)(PVDF) composites with enhanced piezoelectric response. Journal of Alloys and Compounds, 722. pp. 829-838. ISSN 0925-8388

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Flexible polymer-ceramic nanocomposite films were fabricated using electrostrictive polymer Poly(vinylidene fluoride)(PVDF) as the matrix and Zinc ferrite (ZF) as the filler. ZF has been synthesized with the diameter of 50 nm by sol-gel auto-combustion method and encapsulated with PEG-6000. Both the unmodified and surface modified ZF/PVDF polymer nanocomposite films were fabricated in different weight percentages of ZF by casting method for optimization of maximum dielectric, ferroelectric, piezoelectric performance. The robust PEG layer act as the coupling agent on the interface between organic and inorganic phases and improved Maxwell-Wagner-Sillars interfacial polarization by forming an interaction zone with Gouy-Chapman diffuse layer of polyglycolated ZF. The induced polar phase and dielectric permittivity of the composites was increased after surface modification and meanwhile, the dielectric loss was decreased at a low level. 10 wt% ZF-PEG/PVDF showed the maximum polar phase of similar to 92% with maximum dielectric constant 35 +/- .05. Evaluation of the energy storage capability indicated that surface modification has improved the energy storage density. The maximum energy storage density (4.3 J/cm(3)) was observed for 12 wt% ZF/PEG-PVDF composites with maximum energy discharge efficiency (similar to 83%). Further, this composite exhibited 18 Voc ac touch sensing performance which can be utilized for powering micro watt power consuming sensor devices. (C) 2017 Elsevier B.V. All rights reserved.

Item Type: Article
Subjects: Electronics
Divisions: Sensor and Actuator
Depositing User: Bidhan Chaudhuri
Date Deposited: 23 Jan 2018 07:12
Last Modified: 23 Jan 2018 07:12

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