Dielectric properties of binary polyvinylidene fluoride/barium titanate nanocomposites and their nanographite doped hybrids

Li, Y. C.; Tjong, S.C.; Li, R. K. Y.

doi:10.3144/expresspolymlett.2011.51

Cited by 80 publications

(56 citation statements)

References 18 publications

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“…It has been observed from Table (1). The dielectric loss factor increased with temperature for volume fraction (2, 4)%, due to chain motion of polymer is more effective due to glass transition temperature of the polymer, While the dielectric loss factor is low and remained more or less constant with increasing temperature for volume fraction (0,6)% because the orientation polarization due to chain motion of polymer can not keep phase with the rapidly oscillating electric field [28].…”

Section: Resultsmentioning

confidence: 99%

Mechanical and Electrical Behavior of Polymer Matrix Composite and their Hybrids Reinforced with (Carbon Black–Boron) Particles

Al-Khafaji

2013

JNUS

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The work is designed to study experimentally the mechanical and electrical behavior of polymer matrix composites and their hybrids which reinforced by carbon black particles with constant volume fraction (10)% and boron particles with different volume fractions (0,2,4,and 6)% which are bounded with unsaturated polyester resin. Number of mechanical tests were done, they include (hardness, Charpy impact,and bending strength), which done at room temperature in Iraq .Results of the work show that the values of hardness increased with volume fractions of boron powder ,the best values of impact strength and elasticity of modulus present at (4)% .On the other hand,dielectric constant (έ) decreases with increasing applied frequency, and alternating electrical conductivity(σa.c) increases as the applied frequency increases up to 1MHz, While (έ) and (σa.c) increased as increasing of temperature.

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Section: Resultsmentioning

confidence: 99%

Mechanical and Electrical Behavior of Polymer Matrix Composite and their Hybrids Reinforced with (Carbon Black–Boron) Particles

Al-Khafaji

2013

JNUS

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“…The addition of filler materials enhances the conductivity as well as modifies the surface morphology. So incorporation of filler/dopant in PVDF, the materials chemical, physical and dielectric properties can be tailored [16][17][18]. Some work earlier demonstrated the increase in dielectric permittivity with addition of filler material [19,20].…”

Section: Introductionmentioning

confidence: 96%

Effect of CoCl2–BaCl2 fillers on morphology, dielectric constant and conductivity of PVDF composite for pressure sensing application

Gaur

Rana

2015

J Mater Sci: Mater Electron

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This present study focuses on the effect of addition of CoCl 2 -BaCl 2 fillers on the b phase formation and dielectric constant in the PVDF composite films. The pristine and filler based PVDF films were prepared using solution casting technique. XRD analysis were carried out to investigate the crystalline structure in the prepared composite films. The surface morphology of the films were observed using SEM indicating the formation of agglormated structures. The UV-Vis absorption spectrum was obtained to investigate the effect of filler concentration on the optical band gap. The decrease in optical band gap with increase in filler concentration was confirmed from Tauc plot. The incorporation of filler significantly improved the ac conductivity. The dielectric study reveals the increase in value of dielectric constant from 10.8 to 42.3 as the filler content increased from 0 to 12 wt%. A pressure measurement set up was developed and voltage output was measured from the PVDF thin film sensor for variation in applied pressure.

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“…The dielectric relaxation of the crystallites embedded into the polymer matrices was studied [15,16], and the principal role of the interface states on the border polymer-crystallites was established in defining the corresponding dielectric features. Barium titanate, a ferroelectric crystal with high dielectric strength, is widely used for this purpose [17][18][19][20]. The effects of barium titanate (BaTiO 3 ) nanoparticles on electric and mechanical properties are extensively studied, and it was found that the dielectric constant of nanocomposites significantly increases with the increasing BaTiO 3 concentration, whereas volume resistivity decreases continuously [21].…”

Section: Introductionmentioning

confidence: 99%

Silicone dielectric elastomers based on radical crosslinked high molecular weight polydimethylsiloxane co-filled with silica and barium titanate

Bele¹,

Stiubianu²,

Varganici³

et al. 2015

J Mater Sci

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A strategy, consisting in the use in tandem of two active fillers in different ratios with complementary effects: silica mainly as a reinforcing agent and barium titanate as dielectric permittivity enhancer, was proposed to optimize the electromechanical properties of the silicone elastomers. A high molecular mass polydimethylsiloxane-a,x-diol (M w = 642000 g mol -1 ) was used as a matrix to prepare silicone composites which further were processed as films and crosslinked at high temperature. The morphological, thermal, and moisture behaviors of the films were studied by adequate techniques. The mechanical properties were estimated on the basis of normal and cyclic stress-strain curves. Dielectric spectra were recorded in the frequency range of 1-10 6 Hz at normal temperature. The voltages generated by a mechanical impulses created by falling of a metal ball of 7.1 g from a height of one hundred millimeters on the surface of the films placed between two electrodes ranged between 28.4 and 157.3 V mm -1 .

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Dielectric properties of binary polyvinylidene fluoride/barium titanate nanocomposites and their nanographite doped hybrids

Cited by 80 publications

References 18 publications

Mechanical and Electrical Behavior of Polymer Matrix Composite and their Hybrids Reinforced with (Carbon Black–Boron) Particles

Mechanical and Electrical Behavior of Polymer Matrix Composite and their Hybrids Reinforced with (Carbon Black–Boron) Particles

Effect of CoCl2–BaCl2 fillers on morphology, dielectric constant and conductivity of PVDF composite for pressure sensing application

Silicone dielectric elastomers based on radical crosslinked high molecular weight polydimethylsiloxane co-filled with silica and barium titanate

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