Fused filament fabrication of PVDF films for piezoelectric sensing and energy harvesting applications

Abstract

Fused filament fabrication (FFF) of piezoelectric polymer polyvinylidene fluoride (PVDF) provides a simple manufacturing technique for the creation of lead-free piezoelectric devices compared to the traditional manufacturing methods, such as...

Electron/hole piezocatalysis in chemical reactions

“…Polyvinylidene fluoride (PVDF) and its copolymers including poly(vinylidene fluoride- co -trifluoroethylene) (P[VDF–TrFE]), poly(vinylidene fluoride- co -tetrafluoroethylene) (P[VDF–TFE]), poly(vinylidene fluoride-tetrafluoroethylene) ([PVDF-TeFE]), and poly(vinylidene fluoride-hexafluoropropylene) ([PVDF-HFP]) have become the most famous of piezoelectric/pyroelectric/ferroelectric polymers because of high piezoelectric coefficients, mechanical and dielectric properties, flexibility, chemical resistance, toughness, creep resistance, good stability under sunlight, low weight, biocompatibility, and easy processability. 51–54 α, β, and γ phases are the most popular crystalline phases of fluoropolymers that determine their piezoelectricity. The β phase or all- trans conformation is mainly responsible for excellent piezoelectric, pyroelectric, and ferroelectric properties because all the dipole moments are directed in the same direction, resulting in a non-centrosymmetric structure and the largest spontaneous polarization.…”

A critical review: the impact of electrical poling on the longitudinal piezoelectric strain coefficient

“…85–87 Different practical applications, such as pressure sensors, frequency detectors and wind energy harvesting, were also demonstrated using the printed PVDF film. 88 Fig. 6 illustrates the optimization of the poling conditions and stretching ratios through a comparison of the FFF-method-fabricated PVDF film and a commercial hot-pressed PVDF film.…”

“…[85][86][87] Different practical applications, such as pressure sensors, frequency detectors and wind energy harvesting, were also demonstrated using the printed PVDF film. 88…”

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

“…20 However, PVDF naturally crystallizes into the thermodynamically stable aphase, which being non-polar is not piezoelectric. That is why, a variety of processing steps like annealing, stretching, [21][22][23][24] ller addition, [25][26][27] or thermal poling 4,21,28 are required to transform the a-phase into the b-phase. According to Bodkhe et al the addition of BTO nanoparticles facilitates the nucleation of the electroactive b-phase in PVDF.…”