Piezoelectric Effect in Composite Polyurethane–Ferroelectric Ceramics

Sakamoto, Walter Katsumi; Shibatta-Katesawa, S.; Kanda, D. H. F.; Fernandes, Stefania; Longo, Elson; Chierice, G.O.

doi:10.1002/(sici)1521-396x(199903)172:1<265::aid-pssa265>3.3.co;2-e

Cited by 4 publications

(5 citation statements)

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“…The hybridization of composites of high piezoelectric inorganic fillers and high flexibility polymer matrix has been widely adopted to impart flexibility and robustness with good performance. In this respect, there have been several reports of nanocomposite nanogenerators based on PVDF, [30,31] polydimethylsiloxane (PDMS), [32,33] polyurethane [34] as the flexible matrix and piezoelectric micro/nanostructures, such as BaTiO 3 nanoparticles (NPs), [30] NaNbO 3 nanowires, [35] Na 0.47 K 0.47 Li 0.06 NbO 3 (NKLN) microcubes, [36] and porous cellulose nanofibril (CNFs) [37] as piezoelectric fillers. Among them, BaTiO 3 as a lead-free material with high piezoelectric coefficient has been widely used to realize nanocomposite nanogenerator.…”

Section: Introductionmentioning

confidence: 99%

High‐Performance Piezoelectric Nanogenerators with Imprinted P(VDF‐TrFE)/BaTiO₃ Nanocomposite Micropillars for Self‐Powered Flexible Sensors

Chen

Shao

et al. 2017

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Piezoelectric nanogenerators with large output, high sensitivity, and good flexibility have attracted extensive interest in wearable electronics and personal healthcare. In this paper, the authors propose a high-performance flexible piezoelectric nanogenerator based on piezoelectrically enhanced nanocomposite micropillar array of polyvinylidene fluoride-trifluoroethylene (P(VDF-TrFE))/barium titanate (BaTiO ) for energy harvesting and highly sensitive self-powered sensing. By a reliable and scalable nanoimprinting process, the piezoelectrically enhanced vertically aligned P(VDF-TrFE)/BaTiO nanocomposite micropillar arrays are fabricated. The piezoelectric device exhibits enhanced voltage of 13.2 V and a current density of 0.33 µA cm , which an enhancement by a factor of 7.3 relatives to the pristine P(VDF-TrFE) bulk film. The mechanisms of high performance are mainly attributed to the enhanced piezoelectricity of the P(VDF-TrFE)/BaTiO nanocomposite materials and the improved mechanical flexibility of the micropillar array. Under mechanical impact, stable electricity is stably generated from the nanogenerator and used to drive various electronic devices to work continuously, implying its significance in the field of consumer electronic devices. Furthermore, it can be applied as self-powered flexible sensor work in a noncontact mode for detecting air pressure and wearable sensors for detecting some human vital signs including different modes of breath and heartbeat pulse, which shows its potential applications in flexible electronics and medical sciences.

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Section: Introductionmentioning

confidence: 99%

High‐Performance Piezoelectric Nanogenerators with Imprinted P(VDF‐TrFE)/BaTiO₃ Nanocomposite Micropillars for Self‐Powered Flexible Sensors

Chen

Shao

et al. 2017

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“…To generate piezoelectric activity, based on [17], we poled the samples with a 10 MV/m electric field. We immersed the samples in silicone oil to prevent electrical breakdown performed poling for 1.0 h, while maintaining the poling temperature at 90 • C. To establish electrical contact, we vacuum evaporated aluminum electrodes onto both sides of each sample.…”

Section: Methodsmentioning

confidence: 99%

“…All PZT/polymer composites show increased piezoelectric activity as the ceramic content is increased. Also, the composite material has shown an enhanced piezoelectric coefficient when poled with a higher electric field [17]- [21].…”

Section: Introductionmentioning

confidence: 99%

Characterization of PZT/PVDF Composite Film as Functional Material

et al. 2018

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In this paper, we obtained and characterized a composite film made of lead zirconate titanate (PZT) piezoelectric ceramic and nonpolar polyvinylidene fluoride (α-PVDF) as a functional material. The scanning electron microscopy results show this composite film to have mixed connectivity due to the agglomeration of some of the PZT particles. The response of the composite to an applied ac voltage at 4110 Hz has a slope of 0.074 nm/V. The measured displacement is in the range of 0-30 nm for electric voltages ranging from 0 to 400 V. The experimental results show the composite performance as an acoustic emission sensor to be in good agreement with the response of a commercial standard microphone in the frequency range of 2-6 kHz. By applying 2 kN of cyclic force at a frequency of 3 Hz, we obtained an 80-V peak signal and calculated a dissipated power equal to 158 μW. Index Terms-Lead zirconate titanate (PZT), non-polar polyvinylidene fluoride (α-PVDF).Ricardo Luiz Barros de Freitas received the B.Sc. degree in computer engineering from the School of Engineering of Lins in 2005 and the M.Sc. and Ph.D. degrees in electrical engineering from UNESP-São Paulo State University, Ilha Solteira, Brazil, in 2008 and 2012, respectively. He joined the UNESP Optimization Group, Ilha Solteira with a CNPq PDJ grant (2015), as a Post-Doctoral Researcher. He has experience in electrical engineering, computer engineering, and biomedical engineering. He is currently an Adjunct Professor Doctor with the Department of Electrical Engineering and collaborator of the Master's Program in electrical engineering and computing with UNIOESTE-CECE-Campus Foz do Iguaçu. His research interests are knowledge optimization, intelligent materials, piezoelectricity, electronic instrumentation, structured programming, microcontrollers, sensors, hardware, software, and artificial neural networks.

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“…The main advantage of composite materials over individual ones is that they enable the ceramic's high piezoelectric and pyroelectric activities to be combined with the polymer's excellent mechanical properties at the desired ratios and for specific applications [1,2].…”

Section: Introductionmentioning

confidence: 99%

Poled Polyaniline Coated Piezo Composite Using Low Electric Field and Reduced Poling Time: A Functional Material

FuzariJr¹,

Arlindo²,

Zaghete³

et al. 2014

JMSE-B

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Composite films were prepared by two different routes: lead zirconate titanate (PZT) particles coated with polyaniline (PAni) dispersed in a polymeric matrix of polyvinylidene fluoride (PVDF); and PZT particles and PAni powder dispersed separately in the polymer matrix. The electrical conductivity of the particles was controlled by the protonation and de-protonation of PAni in solution with controlled pH. The results indicate that the percolation threshold of the composite made of PZT coated with a conductive layer (PZT-PAni) is in the range of 20 vol.% to 30 vol.% of PZT-PAni. The PZT-PAni/PVDF composite redoped in solution with pH 3.7 showed the best results in terms of longitudinal piezoelectric coefficient (d 33 ) in samples containing 30 vol.% of ceramic particles due to the equilibrium between conduction and poling effects on the composite. The poling process of the composite sample required just 5 MV/m electric field applied during 15 min. Furthermore, the composite was used as sensor in structural health monitoring (SHM), showing the possibility to propose it as a functional material.

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Piezoelectric Effect in Composite Polyurethane–Ferroelectric Ceramics

Cited by 4 publications

References 1 publication

High‐Performance Piezoelectric Nanogenerators with Imprinted P(VDF‐TrFE)/BaTiO₃ Nanocomposite Micropillars for Self‐Powered Flexible Sensors

High‐Performance Piezoelectric Nanogenerators with Imprinted P(VDF‐TrFE)/BaTiO₃ Nanocomposite Micropillars for Self‐Powered Flexible Sensors

Characterization of PZT/PVDF Composite Film as Functional Material

Poled Polyaniline Coated Piezo Composite Using Low Electric Field and Reduced Poling Time: A Functional Material

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Piezoelectric Effect in Composite Polyurethane–Ferroelectric Ceramics

Cited by 4 publications

References 1 publication

High‐Performance Piezoelectric Nanogenerators with Imprinted P(VDF‐TrFE)/BaTiO3 Nanocomposite Micropillars for Self‐Powered Flexible Sensors

High‐Performance Piezoelectric Nanogenerators with Imprinted P(VDF‐TrFE)/BaTiO3 Nanocomposite Micropillars for Self‐Powered Flexible Sensors

Characterization of PZT/PVDF Composite Film as Functional Material

Poled Polyaniline Coated Piezo Composite Using Low Electric Field and Reduced Poling Time: A Functional Material

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High‐Performance Piezoelectric Nanogenerators with Imprinted P(VDF‐TrFE)/BaTiO₃ Nanocomposite Micropillars for Self‐Powered Flexible Sensors

High‐Performance Piezoelectric Nanogenerators with Imprinted P(VDF‐TrFE)/BaTiO₃ Nanocomposite Micropillars for Self‐Powered Flexible Sensors