Unleashing the piezoelectric potential of PVDF: a study on phase transformation from gamma (γ) to beta (β) phase through thermal contact poling

Morali, Alban; Mandal, Arijit; Skorobogatiy, Maksim; Bodkhe, Sampada

doi:10.1039/d3ra05068h

Cited by 7 publications

(2 citation statements)

References 54 publications

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“…The γ+β content was calculated also by using eq due to having a common peak at 840 cm –1 for both γ and β phases. Morali et al used the same equation to calculate γ+β content . According to Cai et al, an additional characteristic peak at 1233 cm –1 has to be monitored to distinguish the γ phase .…”

Section: Resultsmentioning

confidence: 99%

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β Phase Optimization of Solvent Cast PVDF as a Function of the Processing Method and Additive Content

Yasar,

Hassett,

Murphy

et al. 2024

ACS Omega

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A semicrystalline polymer with high piezo-, pyro-, and ferroelectric characteristics, poly(vinylidene fluoride) (PVDF) offers exciting possibilities in various applications. The semicrystalline structure of PVDF is composed of several phases including α, β, θ, γ, and ε phases. β phase polymorphs of PVDF exhibit the highest piezoelectric properties, which can be enhanced through different processing methods. This study aims to investigate the β phase transformation of PVDF through different processes/treatment methods and the processing of a PVDF polymer composite containing 0.2 wt % multiwalled carbon nanotubes and/or 20 wt % modified/unmodified barium titanate. The effects of annealing, uniaxial stretching, rolling, atmospheric plasma treatment, UV treatment, and their combinations were investigated. The transformation of α to β phase was determined by Fourier transform infrared spectrometer, X-ray diffractometer and differential scanning calorimeter. The most remarkable β phase transformation of PVDF films was obtained by stretching following solvent casting and hot pressing. It was observed that various process combinations, as well as the incorporation of additives, influence the β phase content of PVDF. Alongside studying β phase content of PVDF, the investigation extends to analyzing the tan δ and elastic and loss modulus values of rolled PVDF polymer composite films.

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Section: Resultsmentioning

confidence: 99%

“…Morali et al used the same equation to calculate γ+β content. 39 According to Cai et al, an additional characteristic peak at 1233 cm –1 has to be monitored to distinguish the γ phase. 40 Thus, β phase or γ+β phase can be quantified.…”

Section: Resultsmentioning

confidence: 99%

β Phase Optimization of Solvent Cast PVDF as a Function of the Processing Method and Additive Content

Yasar,

Hassett,

Murphy

et al. 2024

ACS Omega

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Investigating the impact of coagulation bath temperature on the properties of biphasic calcium phosphate/poly(vinylidene fluoride)‐based membrane scaffold via immersion precipitation

Mutlu,

Demirci,

Duman

2024

J of Applied Polymer Sci

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In this study, composite membrane scaffolds comprising poly(vinylidene fluoride) (PVDF) and boron‐containing biphasic calcium phosphate (BCP) are developed using a non‐solvent‐induced phase separation technique at coagulation bath temperatures of −5, 0, 10, and 20 °C. The morphology, pore size and tensile strength of the scaffolds are primarily influenced by the bath temperature. Moreover, raising the bath temperature enhances the thermal properties and β‐crystalline phase fraction. Results demonstrate that changes in the temperature increase the surface hydrophilicity and reduce the degree of swelling. According to the in vitro bioactivity analysis, apatite growth is affected by the interactive relation between the surface of the samples and the simulated body fluid (SBF) medium, in addition to the superior bioactivity of the scaffolds. In vitro cytotoxicity assay results confirm the extensive spreading of L‐929 cells on the sample surfaces, indicating the high biocompatibility of the scaffolds. Based on these favorable properties, the novel composite membranes produced, particularly at 20 °C coagulation bath temperature, may contribute to applications in bone tissue engineering.

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Piezoelectric Energy Harvesting: From Fundamentals to Advanced Applications

Bhatnagar,

Yadav,

Kumar

et al. 2024

Energy Tech

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Piezoelectric energy harvesting (PEH) has surfaced as an innovative technology for supplying power to low‐power electronic devices by converting mechanical energy into electrical energy. This technology utilizes the piezoelectric effect, in which specific materials produce an electric charge when they experience mechanical stress. Piezoelectric materials can be categorized into three main types: single crystal, composite, and polymeric. Single‐crystal materials exhibit elevated piezoelectric coefficients and stability; however, they tend to be costly and fragile. Composite materials integrate piezoelectric ceramics with polymer matrices, enhancing flexibility and lowering costs. Polymeric materials exhibit lightweight, flexible, and biocompatibility characteristics, rendering them ideal for wearable and implantable applications. Although PEH presents considerable promise, it is essential to tackle challenges, including low power output, material constraints, and environmental influences. Future investigations will focus on creating innovative materials that exhibit improved piezoelectric characteristics, refining device architecture for optimal energy conversion, and incorporating piezoelectric harvesting technology into intelligent systems. By addressing these challenges and investigating creative solutions, PEH can significantly advance sustainable and self‐powered electronic devices.

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Unleashing the piezoelectric potential of PVDF: a study on phase transformation from gamma (γ) to beta (β) phase through thermal contact poling

Abstract: This novel work provides a step-by-step procedure to enhance piezoelectricity by studying the previously unresearched PVDF's γ- to β-phase transformation.

Cited by 7 publications

References 54 publications

β Phase Optimization of Solvent Cast PVDF as a Function of the Processing Method and Additive Content

β Phase Optimization of Solvent Cast PVDF as a Function of the Processing Method and Additive Content

Investigating the impact of coagulation bath temperature on the properties of biphasic calcium phosphate/poly(vinylidene fluoride)‐based membrane scaffold via immersion precipitation

Piezoelectric Energy Harvesting: From Fundamentals to Advanced Applications

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