Enhanced dielectric properties of polyethylene glycol (PEG) modified BaTiO3 (BT)-poly(vinylidene fluoride) (PVDF) composites

Mishra, Mukesh; Behera, Banarji; Mahaling, Ram Naresh

doi:10.1134/s0965545x17030130

Cited by 19 publications

(19 citation statements)

References 27 publications

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“…This behavior clearly suggests the bulk effect present in the nanocomposites due to the parallel combination of resistive and capacitive elements. [13,47] The decrease of the semicircle arc as the amount of CNWP is increased demonstrates upsurge in the conductivity of the nanocomposite as well as in its conduction mechanism. [47] The statistical model developed in this work, generates the structures of the NR/CNW-PANI nanocomposite, taking into account the structural characteristics of the NR matrix and the highly ordered CNWP randomly dispersed in the matrix.…”

Section: Theoretical-experimental Adjustment Of Ac Electrical Condumentioning

confidence: 99%

“…[13,47] The decrease of the semicircle arc as the amount of CNWP is increased demonstrates upsurge in the conductivity of the nanocomposite as well as in its conduction mechanism. [47] The statistical model developed in this work, generates the structures of the NR/CNW-PANI nanocomposite, taking into account the structural characteristics of the NR matrix and the highly ordered CNWP randomly dispersed in the matrix. These structures were generated using the juxtaposition of square cells with dimensions of 80x80 sites, with 55% of the bond filled.…”

Section: Theoretical-experimental Adjustment Of Ac Electrical Condumentioning

confidence: 99%

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Study of the electrical conduction process in natural rubber‐based conductive nanocomposites filled with cellulose nanowhiskers coated by polyaniline

et al. 2020

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In the present work, the electrical properties of a natural rubber-based nanocomposite (NR) filled with cellulose nanowhiskers (CNW) coated with polyaniline (PANI) were studied. We developed a statistic model that simulates nanocomposite microstructure and conductivity, calculated using the transfer matrix technique. A two-dimensional network of resistors representing a microstructure of both the insulating region (NR) and conductive fillers (cellulose nanowhiskers coated with polyaniline-CNWP) was developed. The conductance of bond between two neighboring sites in the CNWP filler and two neighboring sites of the NR matrix was estimated using Drude's equation and Dyre's formula, respectively. Results of the simulations show that the conduction process between two sites of NR follows the modified Dyre model (RFEB), while between two CNWP sites follows the modified Drude model. The theoretical-experimental adjustment shows that the electrical conduction process occurs via hopping and tunneling between states located inside the CNWP phase, randomly distributed in the rubber matrix.

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Section: Theoretical-experimental Adjustment Of Ac Electrical Condumentioning

confidence: 99%

Section: Theoretical-experimental Adjustment Of Ac Electrical Condumentioning

confidence: 99%

Study of the electrical conduction process in natural rubber‐based conductive nanocomposites filled with cellulose nanowhiskers coated by polyaniline

et al. 2020

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“…We also noticed that the Ti-O bond vibration of NBT indicates the characteristic absorption band at 590 and 533 cm À1 confirms M-O bond. 25 SEM and FESEM are used to examine the morphological structure and dispersion of NBT particles in the polymer matrix. Figure 3 provides SEM and FESEM images of the pure NBT and composite films containing 10 and 40 wt.% of unmodified and modified NBT contents.…”

Section: Characterizationmentioning

confidence: 99%

Enhanced dielectric and ferroelectric properties of surface hydroxylated Na0.5Bi0.5TiO₃ (NBT)-poly(vinylidene fluoride) (PVDF) composites

Sai

2018

J. Adv. Dielect.

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The surface hydroxylation treatment has been carried out by using hydrogen peroxide (H2O2) to modify the surface of Na[Formula: see text]Bi[Formula: see text]TiO3 (NBT) particles in a ferroelectric polymer (PVDF) via solution casting technique. The FTIR study confirms the presence of hydroxyl groups on the surface of NBT. The FE-SEM analysis reveals that h-NBT particles are dispersed homogeneously within the polymer matrix. The surface hydroxylation treatment plays an important role in high dielectric constant and also reduced loss by conducting the material surface with [Formula: see text]OH functional groups. The prepared composite with 40[Formula: see text]wt.% of h-NBT showed enhanced dielectric constant ([Formula: see text]114), negligible loss (0.22) and high AC conductivity as compared to that of the unmodified NBT. Such significant enhancement in dielectric properties may be due to the strong interaction between h-NBT particles and PVDF matrix at the interface. The percolation theory is used to explain the dielectric properties of h-NBT-PVDF composite. Furthermore, the remnant polarization of the un-poled h-NBT-PVDF composites (2[Formula: see text]Pr–1.19[Formula: see text][Formula: see text]C/cm2 for 40[Formula: see text]wt.% of h-NBT) is also improved. The present findings give an idea of high dielectric constant and relatively low loss composite materials as a promising candidate for electronic and energy storage devices.

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“…Barium titanate (BT) particles, as a typical dielectric material with a perovskite crystal structure, possess excellent electrical properties in addition to ferroelectric, piezoelectric, and positive temperature coefficient effects . Thus, the incorporation of BT can enhance the PVDF's permittivity . Many attempts have been made to modify the surface of BT particles to improve their dispersion within the PVDF matrix, enhance the dielectric permittivity of PVDF (ε = 12), and prevent current leakage.…”

Section: Introductionmentioning

confidence: 99%

Crystallinity and morphology of barium titanate filled poly(vinylidene fluoride) nanocomposites

Gong

Chen

Tang

et al. 2018

J of Applied Polymer Sci

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In this study, crystallization behavior and micromorphology of barium titanate (BaTiO3, or BT) filled poly(vinylidene fluoride) (PVDF) nanocomposites were investigated based on Fourier‐transform infrared spectroscopy (FTIR), polarized optical microscopy (POM), differential scanning calorimetry (DSC), and X‐ray diffractometry (XRD). BT/PVDF nanocomposite films with different concentrations of BT nanoparticles were prepared by solution casting method. The results revealed that the electrical conductivity and Seebeck coefficient of PVDF were improved by the incorporation BT nanoparticles. When 2 wt % of BT was loaded into the PVDF matrix, it mediated the β‐phase crystallization in PVDF. Furthermore, the β‐phase crystals could be transformed into α‐phase after the samples were isothermally crystallized at 155 °C for 20 min. The results of DSC and POM suggest that BT nanoparticles could act as nucleation agents, promoting the crystallization activity of PVDF in a nonisothermal crystallization process. The crystal phase is influential to the electrical properties of PVDF, therefore the findings of this study are useful for the development of new applications based on BT/PVDF nanocomposites, such as high‐performance thermoelectric devices or systems. © 2018 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2018, 135, 46877.

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Enhanced dielectric properties of polyethylene glycol (PEG) modified BaTiO3 (BT)-poly(vinylidene fluoride) (PVDF) composites

Cited by 19 publications

References 27 publications

Study of the electrical conduction process in natural rubber‐based conductive nanocomposites filled with cellulose nanowhiskers coated by polyaniline

Study of the electrical conduction process in natural rubber‐based conductive nanocomposites filled with cellulose nanowhiskers coated by polyaniline

Enhanced dielectric and ferroelectric properties of surface hydroxylated Na0.5Bi0.5TiO₃ (NBT)-poly(vinylidene fluoride) (PVDF) composites

Crystallinity and morphology of barium titanate filled poly(vinylidene fluoride) nanocomposites

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Enhanced dielectric properties of polyethylene glycol (PEG) modified BaTiO3 (BT)-poly(vinylidene fluoride) (PVDF) composites

Cited by 19 publications

References 27 publications

Study of the electrical conduction process in natural rubber‐based conductive nanocomposites filled with cellulose nanowhiskers coated by polyaniline

Study of the electrical conduction process in natural rubber‐based conductive nanocomposites filled with cellulose nanowhiskers coated by polyaniline

Enhanced dielectric and ferroelectric properties of surface hydroxylated Na0.5Bi0.5TiO3 (NBT)-poly(vinylidene fluoride) (PVDF) composites

Crystallinity and morphology of barium titanate filled poly(vinylidene fluoride) nanocomposites

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Enhanced dielectric and ferroelectric properties of surface hydroxylated Na0.5Bi0.5TiO₃ (NBT)-poly(vinylidene fluoride) (PVDF) composites