Origin of the strong temperature effect on the piezoelectric response of the ferroelectric (co-)polymer P(VDF70-TrFE30)

Hafner, Jonas; Teuschel, Marco; Schneider, Michael; Schmid, U.

doi:10.1016/j.polymer.2019.02.064

Cited by 39 publications

(39 citation statements)

References 17 publications

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“…Segments 3 and 4 show the inverse process of segments 1 and 2. The D – E hysteresis loop and the concomitant electromechanical deformation were measured simultaneously using in situ cantilever-based deflection measurements 29 , 35 , 36 in combination with a Sawyer–Tower setup. For that purpose, micromachined P(VDF-TrFE) capacitors were used.…”

Section: Resultsmentioning

confidence: 99%

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Multi-scale characterisation of a ferroelectric polymer reveals the emergence of a morphological phase transition driven by temperature

et al. 2021

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Ferroelectric materials exhibit a phase transition to a paraelectric state driven by temperature - called the Curie transition. In conventional ferroelectrics, the Curie transition is caused by a change in crystal symmetry, while the material itself remains a continuous three-dimensional solid crystal. However, ferroelectric polymers behave differently. Polymeric materials are typically of semi-crystalline nature, meaning that they are an intermixture of crystalline and amorphous regions. Here, we demonstrate that the semi-crystalline morphology of the ferroelectric copolymer of vinylidene fluoride and trifluoroethylene (P(VDF-TrFE)) strongly affects its Curie transition, as not only a change in crystal symmetry but also in morphology occurs. We demonstrate, by high-resolution nanomechanical measurements, that the semi-crystalline microstructure in the paraelectric state is formed by crystalline domains embedded into a softer amorphous phase. Using in situ X-ray diffraction measurements, we show that the local electromechanical response of the crystalline domains is counterbalanced by the amorphous phase, effectively masking its macroscopic effect. Our quantitative multi-scale characterisations unite the nano- and macroscopic material properties of the ferroelectric polymer P(VDF-TrFE) through its semi-crystalline nature.

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Section: Resultsmentioning

confidence: 99%

“…For a deeper understanding of the composite nano- and microstructure and its impact on the measurable macroscopic material properties, we performed DMA measurements, yielding the macroscopic Young’s modulus of P(VDF-TrFE) 29 . Details of the DMA measurements are presented in Supplementary Section 7.…”

Section: Resultsmentioning

confidence: 99%

Multi-scale characterisation of a ferroelectric polymer reveals the emergence of a morphological phase transition driven by temperature

et al. 2021

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“…EAPs can generate electrical activity in response to deformations and are widely used in various electronic and biomedical applications. [98,99] PVDF-based polymers are fluorinated electroactive materials, which are known for their remarkable ferroelectric and piezoelectric properties. [98] Compared to other piezoelectric materials such as lead zirconate titanate [100] or aluminum nitrite, [101] PVDF-based polymers are mechanically flexible [98] and mainly processed using SES.…”

Section: Electroactive Polymersmentioning

confidence: 99%

Polymers for Melt Electrowriting

Kade

Dalton

2020

Adv Healthcare Materials

149

155

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Melt electrowriting (MEW) is an emerging high‐resolution additive manufacturing technique based on the electrohydrodynamic processing of polymers. MEW is predominantly used to fabricate scaffolds for biomedical applications, where the microscale fiber positioning has substantial implications in its macroscopic mechanical properties. This review gives an update on the increasing number of polymers processed via MEW and different commercial sources of the gold standard poly(ε‐caprolactone) (PCL). A description of MEW‐processed polymers beyond PCL is introduced, including blends and coated fibers to provide specific advantages in biomedical applications. Furthermore, a perspective on printer designs and developments is highlighted, to keep expanding the variety of processable polymers for MEW.

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“…Piezoelectric materials (PMs) are classified (according to existence) into two classes: natural and man-made. The natural PMs are crystalline materials like Tourmaline (group minerals), Rochelle salt , Topaz and some organic substances like silk, wood bone, rubber etc [29] [30]. Fig.…”

Section: Piezoelectric Phenomenonmentioning

confidence: 99%

Energy Harvesting from Piezoelectric Cantilever Beam with Different Shapes

Amna*,

Sarker,

Mohamed

2019

IJRTE

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This paper reviews the piezoelectric energy harvesting from mechanical vibration. The recent development in the microelectronic devices and wireless sensor networks (WSNs) requires continuous power source for better performance. Many researchers have been done to develop a permanent portable power source for microelectronic devices. Micro energy harvesting (MEH) consists of two basic elements; freely available energy and transducer. Energy is everywhere around us in different forms. The energy conversion ability of piezoelectric energy harvester is high among different MEH techniques. A cantilever type piezoelectric energy harvester under different shapes is mostly studied in the last few years. The output of piezoelectric harvester depends upon the deflection produced, more deflection led to more electrical output. The deflection in cantilever beam under different shapes is different. This review paper presents a comparison of different piezoelectric cantilever beam shapes and output generated analyzed in the last decade.

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Origin of the strong temperature effect on the piezoelectric response of the ferroelectric (co-)polymer P(VDF70-TrFE30)

Cited by 39 publications

References 17 publications

Multi-scale characterisation of a ferroelectric polymer reveals the emergence of a morphological phase transition driven by temperature

Multi-scale characterisation of a ferroelectric polymer reveals the emergence of a morphological phase transition driven by temperature

Polymers for Melt Electrowriting

Energy Harvesting from Piezoelectric Cantilever Beam with Different Shapes

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