Nanoscale investigation of ferroelectric properties in electrospun barium titanate/polyvinylidene fluoride composite fibers using piezoresponse force microscopy

Baji, Avinash; Mai, Yiu‐Wing; Li, Qian; Liu, Yun

doi:10.1016/j.compscitech.2011.05.017

Cited by 94 publications

(78 citation statements)

References 34 publications

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“…Ceramic fibers are attractive because of the increased anisotropy, improved flexibility and strength over monolithic ceramics. For instance, the potential of nanostructured composites that include BaTiO 3 fibers in their compositions has been demonstrated by applications in miniaturized electronic devices and sensors [21,23,25]. Concerning different device configuration 3 possibilities, a significant increase in the composite dielectric permittivity was obtained depending on the orientation of fibers inside the matrix [24].…”

Section: Introductionmentioning

confidence: 99%

“…Composites can be prepared in many different ways, leading to a large variety of morphologies, which strongly influence the macroscopic behavior [19]. Recently, new polymer composites using electrospun BaTiO 3 fibers have been reported with promising results [20][21][22][23][24]. Ceramic fibers are attractive because of the increased anisotropy, improved flexibility and strength over monolithic ceramics.…”

Section: Introductionmentioning

confidence: 99%

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Dielectric permittivity calculation of composites based on electrospun barium titanate fibers

Reboredo

Parra

Castro

2015

Mater. Res. Express

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On the basis of theoretical predictions and experimental results, an empirical method using upper bound equation of the rule of mixtures (ROM) is reported to predict the dielectric permittivity of barium titanate nanofibers. In addition, composites with low volume fraction of BaTiO 3 fiber layers embedded in epoxy resin were prepared and characterized. The relative permittivities of composites with perpendicular and parallel configurations, with respect to the electrodes, were calculated by means of the ROM model. The predicted permittivities matched precisely the obtained experimental values.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Dielectric permittivity calculation of composites based on electrospun barium titanate fibers

Reboredo

Parra

Castro

2015

Mater. Res. Express

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“…By contrast, compliant polymeric materials such as polyvinylidene fluoride (PVDF) and its copolymers are easy to process but generally have low piezoelectric coefficient values when compared to ferroelectric ceramics [7,8]. Thus, the incorporation of a ceramic phase into an electroactive polymeric matrix could yield composites with improved mechanical integrity and piezoelectric characteristics [1,2].…”

Section: Introductionmentioning

confidence: 99%

“…There has been substantial recent interest in the development of nanostructured piezo-sensitive composites as they can potentially display combination of desirable physical properties which cannot be obtained in single phase materials [1][2][3]. Hence, ceramics such as zinc oxide, bismuth ferrite, lead zirconate titanate, barium titanate (BaTiO 3 ) etc.…”

Section: Introductionmentioning

confidence: 99%

Effect of Barium Titanate Reinforcement on Tensile Strength and Dielectric Response of Electrospun Polyvinylidene Fluoride Fibers

Baji¹,

Mai²

2018

Novel Aspects of Nanofibers

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In this study, we used electrospinning to obtain polyvinylidene fluoride (PVDF) fibers reinforced with barium titanate (BaTiO 3 ) and investigated the influence of BaTiO 3 concentration on the tensile strength and dielectric behavior of PVDF fibers. X-ray diffraction (XRD) study and infrared spectroscopy revealed that PVDF fibers filled with BaTiO 3 possessed higher fraction of ferroelectric β-crystals compared to neat PVDF fibers. Further, incorporation of 40 wt% BaTiO 3 within the fibers increased their stiffness and strength by 95 and 38%, respectively. These improvements in tensile properties of BaTiO 3 filled PVDF fibers arose from the reinforcement effect of BaTiO 3 . Also, the dielectric response of the BaTiO 3 /PVDF fibers was characterized. The effective dielectric constants of PVDF fibers reinforced with BaTiO 3 were found to increase consistently with BaTiO 3 content at all frequencies. The dielectric loss of the fibers did not show any significant change for all concentrations of BaTiO 3 within the fibers.

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“…Thus far, most studies aimed to enhance piezoelectricity via modulation of the piezoelectric coefficient, d ij , by novel material development. Examples include polymer-based piezocomposite materials with inorganic piezoelectric materials 14,15 or multiwalled carbon nanotubes. 16 In spite of an equivalent contribution from E kj to the overall piezoelectric response, the mechanical aspects of piezoelectric materials are often neglected.…”

Section: Introductionmentioning

confidence: 99%

Size-dependent piezoelectric and mechanical properties of electrospun P(VDF-TrFE) nanofibers for enhanced energy harvesting

et al. 2016

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Piezoelectricity-based energy harvesting from wasted mechanical energies has garnered an increasing attention as a clean energy source. Especially, flexible organic piezoelectric materials provide an opportunity to exploit their uses in the mechanically challenging areas where brittle inorganic counterparts have mechanical limitations. In this regard, electrospinning has shown its advantages of producing poly(vinylidene fluoride) (PVDF)-based nanofibrous structures without the necessity of a secondary processing to induce/increase piezoelectric properties. However, the effects of electrospun fiber dimension, one of the main morphological parameters in electrospun fibers, on piezoelectricity have not been fully understood. In this study, two dependent design of experiments (DOEs) were utilized to systematically control the dimensions of electrospun poly(vinylidene fluoride-trifluoroethylene) (P(VDF-TrFE)) to produce nanofibers having their diameter ranging from 1000 to sub-100 nm. Such a dimensional reduction resulted in the increase of piezoelectric responsible electroactive phase content and the degree of crystallinity. These changes in crystal structure led to approximately 2-fold increase in piezoelectric constant as compared to typical P(VDF-TrFE) thin films. More substantially, the dimensional reduction also increased the Young's modulus of the nanofibers up to approximately 80-fold. The increases in piezoelectric constant and Young's modulus collectively enhanced piezoelectric performance, resulting in the exponential increase in electric output of nanofiber mats when the fiber diameters were reduced from 860 nm down to 90 nm.Taken together, the results suggest a new strategy to improve the piezoelectric performance of electrospun P(VDF-TrFE) via optimization of their electromechanical and mechanical properties.

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Nanoscale investigation of ferroelectric properties in electrospun barium titanate/polyvinylidene fluoride composite fibers using piezoresponse force microscopy

Cited by 94 publications

References 34 publications

Dielectric permittivity calculation of composites based on electrospun barium titanate fibers

Dielectric permittivity calculation of composites based on electrospun barium titanate fibers

Effect of Barium Titanate Reinforcement on Tensile Strength and Dielectric Response of Electrospun Polyvinylidene Fluoride Fibers

Size-dependent piezoelectric and mechanical properties of electrospun P(VDF-TrFE) nanofibers for enhanced energy harvesting

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