Adak, Biplab and Chinya, Ipsita and Sen, Shrabanee (2016) Enhanced dielectric and energy storage performance of surface treated gallium ferrite/polyvinylidene fluoride nanocomposites. RSC Advances, 6 (107). pp. 105137-105145. ISSN 2046-2069

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The ceramic-polymer nanocomposites composed of gallium ferrite (GFO) nanoparticles and employing sodium dodecylsulphate (SDS) as surfactant and polyvinylidene fluoride (PVDF) as matrix have been fabricated by solvent casting followed by hot-press technique. It was found that modified GFO nanoparticles favours nucleation and stabilization up to similar to 84% electroactive phase (b-and g-phase) in PVDF. Fourier transform infrared spectroscopy (FTIR) results revealed that the interfacial electrostatic interaction between nanoparticle surface charge and CH2/CF2 - molecular dipole of PVDF favoured nucleation of electroactive phase. Compared to the pristine PVDF, much higher dielectric constant (epsilon(r) similar to 25 at 10 kHz frequency) with low loss factor (tan delta similar to 0.02 at 10 kHz) was achieved in the composite film. In addition, the nanocomposite showed higher electrical energy density (U-d similar to 3.88 mJ cm(3) at an electric field 6 kV mm(-1)) compared to pristine PVDF which determined their applicability as flexible energy density capacitor.

Item Type: Article
Subjects: Electronics
Divisions: Sensor and Actuator
Depositing User: Bidhan Chaudhuri
Date Deposited: 25 Jan 2017 12:40
Last Modified: 25 Jan 2017 12:40

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