Melt Electrowriting of Electroactive Poly(vinylidene difluoride) Fibers

Florczak, Sammy; Lorson, Thomas; Tian, Zheng; Mrlík, Miroslav; Hutmacher, Dietmar W.; Higgins, Michael J.; Luxenhofer, Robert; Dalton, Paul D.

doi:10.26434/chemrxiv.7195460.v1

Cited by 5 publications

(7 citation statements)

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“…TGA revealed that the mass of the P(VDF-co-TrFE) melt remains constant over the measured period of 5 h at 170°C to simulate the conditions during the MEW process (Figure S1A). A color change of the melt from colorless/transparent to yellow-brown could be observed in line with that similarly observed for PVDF [22]. This color change may be attributed to low molar mass additives or unknown residues from the synthesis, rather than the polymer.…”

Section: Fiber Fabricationsupporting

confidence: 86%

“…The enhanced control provided by MEW allows to direct-write scaffolds with defined structures and pore sizes [17][18][19][20][21]. Previously, a piezoelectric polymer (PVDF) was processed via MEW for the first time, with the fibers having increased β-phase content compared to the unprocessed powder [22]. The copolymer P(VDF-co-TrFE) has, to date, been processed predominantly using solution electrospinning (SES) and film drawing.…”

Section: Introductionmentioning

confidence: 99%

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Melt Electrowriting of Poly(vinylidene Fluoride-Co-Trifluoroethylene)

Kade¹,

Tadon²,

Weichhold³

et al. 2021

Preprint

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Poly(vinylidene fluoride-co-trifluoroethylene) (P(VDF-co-TrFE)) is an electroactive polymer with growing interest for applications in biomedical materials and flexible electronics. In this study, a solvent-free additive manufacturing technique called melt electrowriting (MEW) has been utilized to fabricate well-defined microperiodic structures of P(VDF-co-TrFE). Melt electrowriting of the highly viscous polymer melts was initiated using a heated collector at temperatures above 120 °C and required remarkably slow collector speeds below 100 mm/min. This contribution shows electrohydrodynamic processing of fibers with micrometer resolution into defined structures with an important electroactive polymer.<br>

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Section: Fiber Fabricationsupporting

confidence: 86%

Section: Introductionmentioning

confidence: 99%

Melt Electrowriting of Poly(vinylidene Fluoride-Co-Trifluoroethylene)

Kade¹,

Tadon²,

Weichhold³

et al. 2021

Preprint

Self Cite

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“…Also, the fabrication of films through electrospinning, which is also a form of mechanical elongation, was successfully applied [13]. Certain improvements in the α-β-phase transformation were observed after the addition of graphene oxide or cellulose particles [14,15].The β-phase is also achievable from the γ and δ-phase using a plethora of other processing techniques [9,16]. However, from the technological point of view, the uniaxial stretching is the most convenient method to convert the α-phase into its electroactive β-counterpart.…”

Section: Introductionmentioning

confidence: 99%

the effects of molecular and processing parameters on energy harvesting capability of PVDF-based nanogeneratorS

Cvek

Osička

Srnec

et al. 2020

NANOCON Conference Proeedings

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In the research of the alternative vibration sensing systems, the major potential is attributed to piezoelectric materials that can generate the electrical output from the waste vibration sources of the industrial machines. Poly(vinylidene fluoride) (PVDF), mostly in the electroactive β-phase, is a great option due to its excellent piezoelectric properties and good flexibility. The β-phase PVDF can be obtained by simple stretching of the αphase PVDF films, and the conditions of this process are well documented. Surprisingly, the implications of molecular parameters of the PVDF have not been addressed yet. This study investigates the effect of the molecular weight (Mw) of the PVDF on the β-phase development and consequential vibration sensing capabilities after uniaxial stretching. The successful phase transformation was confirmed using FTIR and XRD. In the FTIR spectra, a typical α-phase peak at 762 cm -1 diminished giving rise to the β-phase peak at 840 cm -1 after the stretching. The results also showed a remarkable impact of the Mw on d33 coefficient making Mw an important parameter that should not be overlooked in designing the PVDF-based sensing elements. The obtained data are highly important for the optimization of the PVDF-based vibration sensors applicable in the efficient structural and health monitoring nanosystems.

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“…There are also other techniques of the PVDF post-processing that were successfully applied to increment the d33 coefficients including the electrospinning [17], melt-electrowriting [18] or the extrusion [19].…”

Section: Introductionmentioning

confidence: 99%

Effect of Extrusion Process and Various Elongation Ratios on the Structural and Dielectric Properties of PVDF-Based Copolymer Containing Micro and Nano-Sized Crystallites

Mrlík

Cvek

Osička

et al. 2020

NANOCON Conference Proeedings

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In this contribution, the effect of the extrusion process of the poly(vinylidene fluoride-co-hexafluoropropylene) (PVDF-co-HFP) with the subsequent elongation/poling on its structural and dielectric properties is presented. The extrusion can be understood as continuous processing of polymer melts in the large scale (in comparison to solvent casting), when the thickness of the final product can be varied depending on the final operation conditions. Herein, the PVDF-co-HFP sheets of 5 cm in width were extruded using a single screw extruder. The fabricated sheets were cooled down and then, they were cut to the stripes and subsequently stretched to various elongations (100, 200 and 500 %) using a universal tensile testing machine. Such samples were investigated using FTIR in order to determine the effect of the elongation process on the transformation of the α-phase to the β-crystalline phase. The extend of the electro-active β-phase was quantified and its impact on the dielectric properties was investigated. The results clearly demonstrated that the elongation has a crucial effect on the final dielectric properties of the PVDF-co-HFP.

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Melt Electrowriting of Electroactive Poly(vinylidene difluoride) Fibers

Cited by 5 publications

References 0 publications

Melt Electrowriting of Poly(vinylidene Fluoride-Co-Trifluoroethylene)

Melt Electrowriting of Poly(vinylidene Fluoride-Co-Trifluoroethylene)

the effects of molecular and processing parameters on energy harvesting capability of PVDF-based nanogeneratorS

Effect of Extrusion Process and Various Elongation Ratios on the Structural and Dielectric Properties of PVDF-Based Copolymer Containing Micro and Nano-Sized Crystallites

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