Study of ferroelectric properties on PVDF-PZT nanocomposite

Pradhan, Santanu Kumar; Kumar, Amit; Sinha, Amar Nath; Kour, P.; Pandey, Rabichandra; Kumar, Pawan; Kar, Manoranjan

doi:10.1080/00150193.2017.1362243

Cited by 27 publications

(10 citation statements)

References 24 publications

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“…The Bragg peaks at 6.79° and 7.38° show the presence of α and β forms of NiPc in the multilayers of PVDF/NiPc nanocomposite which cannot be quantified faithfully due to the proximity of the GIXD diffraction. The crystallite size of the nanocomposite multilayers of PVDF/MPc was calculated using Scherrer's relation,

D = \frac{0.9 λ}{K \cos θ}

…”

Section: Resultssupporting

confidence: 90%

“…The performance of a polymer nanocomposite typically depends on the crystallinity fraction, the interaction between the dipoles of polymer and nanocomposite, filler percentage, strain due to fillers, and dislocation. An increase in the microstrain leads to an improvement in the electric polarization of PVDF/PZT nanocomposite . Hence for the current study, nanocomposite multilayers of PVDF/CuPc may be a better candidate than PVDF/NiPc nanocomposite.…”

Section: Resultsmentioning

confidence: 92%

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Metallophthalocyanine‐enriched Langmuir‐Schaefer multilayers of poly(vinylidene fluoride)‐based nanocomposites

Kumar

Viswanath

2019

J of Applied Polymer Sci

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Engineering the surface morphology with optimized crystallinity is very crucial for practical applications such as energy storage, electromechanical devices, and self‐cleaning. Organic nanocomposites permit one to tune the dielectric properties by controlling the crystallinity and surface morphology. Here, we report our investigation on metallophthalocyanines of nickel and copper as an organic additive to poly(vinylidene fluoride) (PVDF) to modify the structural, optical, wetting, and electrical properties of the nanocomposite multilayers deposited using Langmuir‐Schaefer method. The incorporation of the metallophthalocyanines in the nanocomposite multilayers was confirmed from the signature Bragg peaks, and the fingerprint absorbance using grazing incidence X‐ray diffraction and Fourier transform infrared spectroscopy, respectively. Aggregation behavior of the metallophthalocyanines in the polar matrix of PVDF was studied using ultraviolet–visible spectroscopy. Surface morphological studies using field emission scanning electron microscopy on the nanocomposite multilayers show the presence of both spherical crystallites and rod‐like structures which depends upon the composition and nature of metal in metallophthalocyanine. The surface wettability of these multilayers was investigated using static and dynamic contact angle studies. A significant enhancement in the dielectric constant has been observed for both nanocomposites relative to the pristine multilayer of PVDF. © 2019 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2019, 136, 47818.

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D = \frac{0.9 λ}{K \cos θ}

…”

Section: Resultssupporting

confidence: 90%

Section: Resultsmentioning

confidence: 92%

Metallophthalocyanine‐enriched Langmuir‐Schaefer multilayers of poly(vinylidene fluoride)‐based nanocomposites

Kumar

Viswanath

2019

J of Applied Polymer Sci

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“…Polymer ferroelectrics (PF) and polymer dielectrics (PD) are considered recently to be the fascinating materials for their large inherent benefits of nonvolatile memory/sensor/piezoelectric/dielectric/pyroelectric/magneto-electric applications [1][2][3][4][5][6][7][8][9][10][11][12][13][14][15][16][17]. The conventional ferroelectric ceramic materials, e.g.…”

Section: Introductionmentioning

confidence: 99%

Ferroelectric, Piezoelectric and Dielectric Properties of Novel Polymer Nanocomposites

Panda¹

2021

Multifunctional Ferroelectric Materials

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In this chapter, the Ferroelectric, Piezoelectric and Dielectric behavior of novel polymer/ceramic nano-composite (PCC) based on ferroelectric polymer [polyvinyledene fluoride (PVDF)] & nano Barium Titanate (n-BaTiO3) with different volume fractions of n-BaTiO3 (fBaTiO3), prepared through the novel cold pressing method has been discussed. The ferroelectric parameters of PCC are attributed to spherulites of PVDF, the increase of n-BaTiO3 and the ordered homogenous structure due to the novel cold pressing. The clustering of ceramic fillers is responsible for randomization of the structures of these composite ferroelectrics for some samples, leading to decrease of electrical polarisations. The piezoelectricity and piezoelectric coefficients of these composites ferroelectrics, increases with increase of ceramic filer content and remains constant beyond a certain ratio. However, the dielectric properties increase linearly as a function of ceramic content due to increase of interfaces/interfacial polarisations. The enhancement of effective dielectric constant (ɛeff) is attributed to the large interfacial polarization arising due to the charge storage at the spherulites of PVDF and at the polymer/filler interfaces of PCC and have been explained on the basis of sum effect with the help of the standard models. The achieved lower loss tangent (Tan δ) for the PCC as compared to the polymer/metal composites (PMC) is attributed to the highly insulating nature of PVDF & semiconducting n-BaTiO3. The thermal stability of the composites is also maintained due to the higher melting temperature (170°C) of PVDF. The cold pressed PCC based on PVDF are going to act as better polymer ferroelectric/dielectrics for memory and electrical energy storage applications.

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“…The new generation of detectors coupled with the improvements of laser diodes resulted in new Raman spectrometers with resolutions of the order of 1 cm −1 . Such enhanced resolutions triggered a renewed interest in the study of polymers with particular emphasis on polymer‐based nanocomposites . In the case of polymer‐based nanocomposites, the loading of the polymeric matrix by the nanofiller stretches the macromolecular chains.…”

Section: Introductionmentioning

confidence: 99%

Spectroscopic investigations on PVDF‐Fe₂O₃ nanocomposites

Chipara

Kuncser

Lozano

et al. 2020

J of Applied Polymer Sci

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Polyvinylidene fluoride-iron oxide (PVDF-Fe 2 O 3 ) nanocomposites have been obtained my melt mixing of PVDF with Fe 2 O 3 nanoparticles. The interactions between the polymeric matrix and the nanofiller have been investigated by wide angle X-ray scattering (WAXS), Fourier transform infrared spectroscopy (FTIR), and Raman spectroscopy, using both red and green excitations (lasers). WAXS, FTIR, and Raman spectra confirm that all samples contain α PVDF as the major crystalline form of the polymeric matrix. Experimental data revealed small changes in the positions of X-ray lines as well as modifications of the width of X-ray lines upon loading by Fe 2 O 3 nanoparticles. FTIR and Raman spectra are dominated by the lines of the polymeric matrix. Within the experimental errors, the positions of Raman lines are not affected by the wavelength of the incoming electromagnetic radiation, although they are sensitive to the strain of the polymeric matrix induced by addition of the nanofiller. The loading of the polymeric matrix with nanoparticles stretches the macromolecular chains, affecting their vibrational spectra (FTIR and Raman). A complex dependence of the positions of some Raman and FTIR lines on the loading with Fe 2 O 3 is reported. The manuscript provides a detailed analysis of the effects of nanofiller on the position of WAXS, FTIR, and Raman lines.

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Study of ferroelectric properties on PVDF-PZT nanocomposite

Cited by 27 publications

References 24 publications

Metallophthalocyanine‐enriched Langmuir‐Schaefer multilayers of poly(vinylidene fluoride)‐based nanocomposites

Metallophthalocyanine‐enriched Langmuir‐Schaefer multilayers of poly(vinylidene fluoride)‐based nanocomposites

Ferroelectric, Piezoelectric and Dielectric Properties of Novel Polymer Nanocomposites

Spectroscopic investigations on PVDF‐Fe₂O₃ nanocomposites

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Study of ferroelectric properties on PVDF-PZT nanocomposite

Cited by 27 publications

References 24 publications

Metallophthalocyanine‐enriched Langmuir‐Schaefer multilayers of poly(vinylidene fluoride)‐based nanocomposites

Metallophthalocyanine‐enriched Langmuir‐Schaefer multilayers of poly(vinylidene fluoride)‐based nanocomposites

Ferroelectric, Piezoelectric and Dielectric Properties of Novel Polymer Nanocomposites

Spectroscopic investigations on PVDF‐Fe2O3 nanocomposites

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Spectroscopic investigations on PVDF‐Fe₂O₃ nanocomposites