Electric poling-assisted additive manufacturing technique for piezoelectric active poly(vinylidene fluoride) films: Towards fully three-dimensional printed functional materials

Recent Progress on Structure Manipulation of Poly(vinylidene fluoride)‐Based Ferroelectric Polymers for Enhanced Piezoelectricity and Applications

“…However, despite the formation of PVDF 𝛽 crystals being promoted by using the poling-integrated 3D printing, the 𝛽phase content and piezoelectric properties of the printed sample remain relatively low. [209,212] Replacing PVDF with P(VDF-TrFE) is considered as an effective approach. For instance, Ikei et al used an in situ polarization process similar to EPAM to print and pole P(VDF-TrFE) (70/30) simultaneously.…”

3D-Printed Flexible PVDF-TrFE Composites with Aligned BCZT Nanowires and Interdigital Electrodes for Piezoelectric Nanogenerator Applications

“…Unfortunately, these fabrication methods have their own limitations, which make them complex and less versatile for the manufacturing of piezoelectric nanocomposites with aligned nanowires. Recently, direct-ink writing has been considered as a facile and rapid method for aligning piezoelectric nanowires in polymers. − A shear-induced alignment during direct-ink writing is relatively simple to achieve without the external electric field, and various piezoelectric nanocomposites have been fabricated using appropriate control of processing conditions. , Moreover, the direct-ink writing technique is suitable for the manufacture of piezoelectric composite films due to its high efficiency and desirable structure design. , For instance, Gao et al aligned (Na,K)­NbO 3 (KNN) nanowires in a polydimethylsiloxane (PDMS) matrix by a direct-ink writing method. The output voltage was nearly 400% higher than a spin-coated film owing to the alignment of the nanowires .…”

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

“…We then present a comprehensive investigation of the effect of poling on the phase composition of PVDF using the eqn (1) and (2) to determine the true content of b-phase. 41,[49][50][51] Specically, we focus on analyzing the changes in the peak intensities of the spectra obtained from these techniques: rst qualitatively to extract meaningful insights and then quantitatively using eqn (1) and ( 2). This study embarks on a pioneering exploration of the transition from the g-phase to the b-phase in PVDF, a topic that hasn't been addressed in the literature till date.…”