Study of Electrical Behaviors of PVDF/BiGdO3 Polymer Composite

Padhy, Minakshi; Sahoo, L. P.; Rath, Ananya; Achary, P. Ganga Raju

doi:10.1007/978-981-16-9057-0_57

Cited by 2 publications

(3 citation statements)

References 16 publications

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“…The lower tan δ of PVDF–BF33BT below 10 4 Hz is due to the comparatively minimal tan δ of the BF33BT, as shown in Figure S4 of the SI, and the increase of tan δ above 10 4 Hz is attributed to the higher rate of α-relaxation in the composites than the pure PVDF . The rapid decrease in tan δ in the frequency range 10 2 –10 4 Hz is due to the Maxwell–Wagner relaxation, which is sluggish in the PVDF–BF33BT composites. , The ε′ of the two-phase composite improves from 13 to 19.3, and the tan δ decreases from 0.096 to 0.042 (1 kHz) for the 40 wt % BF33BT concentration as shown in Figure e. The dielectric constant enhancement and the tan δ decrement make the two-phase PVDF–BF33BT composite preferable for piezoelectric applications; however, the addition of GO further improves the overall electrical properties of the composite.…”

Section: Resultsmentioning

confidence: 95%

“…22 The rapid decrease in tan δ in the frequency range 10 2 −10 4 Hz is due to the Maxwell−Wagner relaxation, which is sluggish in the PVDF−BF33BT composites. 53,54 The ε′ of the two-phase composite improves from 13 to 19.3, and the tan δ decreases from 0.096 to 0.042 (1 kHz) for the 40 wt % BF33BT concentration as shown in Figure 4e. The dielectric constant enhancement and the tan δ decrement make the two-phase PVDF−BF33BT composite preferable for piezoelectric applications; however, the addition of GO further improves the overall electrical properties of the composite.…”

Section: Structural and Morphological Xrd Ftir Andmentioning

confidence: 82%

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Modulation of Electrical Characteristics of Polymer–Ceramic–Graphene Hybrid Composite for Piezoelectric Energy Harvesting

Muduli,

Lipsa,

Choudhary

et al. 2023

ACS Appl. Electron. Mater.

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The use of lead-based ceramics to enhance the piezoelectricity of poly(vinylidene fluoride) (PVDF) is the primary challenge toward nontoxic flexible piezoelectric devices. 0.67BiFeO 3 -0.33BaTiO 3 (BF33BT) is one of the lead-free piezoceramics with high-temperature stability and comparable piezoelectric characteristics to existing lead-based piezoceramics. The work represents PVDF−BF33BT two-phase and PVDF− BF33BT−graphene oxide (GO) three-phase composites with detailed analysis of the dielectric, ferroelectric, and piezoelectric characterizations. Solvent-casting followed by the hot-pressing technique improves the electroactive β-phase of ≥60% in the composites. With BF33BT and GO loading, the dielectric constant and loss tangent increase; however, there is an abrupt rise at the threshold GO concentration of 0.08 wt %. The three-phase composite with 40 wt % BF33BT and 0.08 wt % GO records a dielectric constant of 303 and a loss tangent of 0.68. The harvester out of the same composition achieves a piezoelectric strain constant of 9 pC•N −1 , an open-circuit voltage of ∼3.9 V, and a short-circuit current of 1.3 μA. The feasibility of the harvester was tested by powering a calculator by charging a 2.2 μF capacitor after rectification. The recoverable energy density also improves seven times, indicating that the PVDF−BF33BT−GO composite is preferable for piezoelectric and energy storage applications.

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Section: Resultsmentioning

confidence: 95%

Section: Structural and Morphological Xrd Ftir Andmentioning

confidence: 82%

Modulation of Electrical Characteristics of Polymer–Ceramic–Graphene Hybrid Composite for Piezoelectric Energy Harvesting

Muduli,

Lipsa,

Choudhary

et al. 2023

ACS Appl. Electron. Mater.

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“…The changes observed in the low-and high-frequency regions can be attributed to the Maxwell−Wagner−Sillars polarization phenomenon. 51,52 The incorporation of nucleating agents into the nanocomposite produced a positive trend in the dielectric constant. A remarkable change in dielectric constant is observed for the PML-2 sample compared to the PML-0 mat.…”

Section: Dielectric Studiesmentioning

confidence: 99%

Ternary Fiber Mats of PVDF-HFP/Cellulose/LiFe₅O₈ Nanoparticles with Enhanced Electric, Magnetoelectric, and Antibacterial Properties: A Promising Approach for Magnetic and Electric Field-Responsive Antibacterial Coatings

Chacko,

Balakrishnan,

Kalarikkal

et al. 2024

ACS Appl. Polym. Mater.

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In this study, a flexible, lightweight, and multifunctional ternary nanocomposite fiber system, comprising poly-(vinylidene fluoride-co-hexafluoropropylene) (PVDF-HFP), microcrystalline cellulose (MCC), and LiFe 5 O 8 (LFO) nanoparticles, and exhibiting a magnetoelectric coupling property alongside antibacterial traits, is reported. The engineered composite system with magnetoelectric and antibacterial properties is an optimal candidate for field-mediated antibacterial coating surfaces. The enhancement in the electroactive phase in the polymer nanocomposite systems has been studied using various techniques, and a maximum of polar phase ∼95% is achieved for 8 wt % of the LFO-loaded composite fiber system. The composite fiber system shows remarkable enhancement in the dielectric constant, and the maximum value of the magnetoelectric coupling coefficient (MECC) reached 20.3 mV/cm Oe for 8 wt % of the LFO-loaded sample. Ferroelectric properties have also been investigated to ensure the enhancement of the electroactive phase. The antibacterial efficiency of the prepared fiber mats was studied using the minimal inhibitory concentration (MIC) method. This unique combination of magnetoelectric coupling and antibacterial properties provides a transformative solution for self-sustaining antibacterial coating surfaces that are also electric and magnetic field-tuned.

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Study of Electrical Behaviors of PVDF/BiGdO3 Polymer Composite

Cited by 2 publications

References 16 publications

Modulation of Electrical Characteristics of Polymer–Ceramic–Graphene Hybrid Composite for Piezoelectric Energy Harvesting

Modulation of Electrical Characteristics of Polymer–Ceramic–Graphene Hybrid Composite for Piezoelectric Energy Harvesting

Ternary Fiber Mats of PVDF-HFP/Cellulose/LiFe₅O₈ Nanoparticles with Enhanced Electric, Magnetoelectric, and Antibacterial Properties: A Promising Approach for Magnetic and Electric Field-Responsive Antibacterial Coatings

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Study of Electrical Behaviors of PVDF/BiGdO3 Polymer Composite

Cited by 2 publications

References 16 publications

Modulation of Electrical Characteristics of Polymer–Ceramic–Graphene Hybrid Composite for Piezoelectric Energy Harvesting

Modulation of Electrical Characteristics of Polymer–Ceramic–Graphene Hybrid Composite for Piezoelectric Energy Harvesting

Ternary Fiber Mats of PVDF-HFP/Cellulose/LiFe5O8 Nanoparticles with Enhanced Electric, Magnetoelectric, and Antibacterial Properties: A Promising Approach for Magnetic and Electric Field-Responsive Antibacterial Coatings

Contact Info

Product

Resources

About

Ternary Fiber Mats of PVDF-HFP/Cellulose/LiFe₅O₈ Nanoparticles with Enhanced Electric, Magnetoelectric, and Antibacterial Properties: A Promising Approach for Magnetic and Electric Field-Responsive Antibacterial Coatings