Study of structural, electrical, and dielectric properties of polystyrene/foliated graphite nanocomposite developed via <i>in situ</i> polymerization

Srivastava, N. K.; Mehra, R.M.

doi:10.1002/app.28499

Cited by 51 publications

(27 citation statements)

References 40 publications

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“…It was reported that acrylonitrile-butadiene rubber (NBR)/GO composites with 2 wt% GO loadings show enhancement in the dielectric constant of about five times that of neat rubber at 10 kHz [48]. High values of dielectric constant (7.87 9 10 4 ) were obtained from highly conducting polystyrene/foliated graphite nanocomposites with volume fraction of 0.031 of the foliated graphite at low frequency (100 Hz) [49]. Styreneacrylonitrile (SAN)/graphite sheets (GS) nanocomposites with 6 wt% graphite loading exhibits high dielectric constant value (7.84 9 10 5 ) at 100 Hz.…”

Section: Dielectric Properties Of Pedot-tma/pmma/ Go Compositesmentioning

confidence: 97%

Embedded capacitor applications of graphene oxide reinforced poly(3,4-ethylenedioxythiophene)-tetramethacrylate (PEDOT-TMA) composites

Deshmukh

Joshi

2015

J Mater Sci: Mater Electron

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We report synthesis and characterizations of graphene oxide (GO) reinforced poly(3,4-ethylene dioxythiophene)-tetra methacrylate (PEDOT-TMA)/polymethylmethacrylate (PMMA) based novel composites. The composites were prepared by colloidal blending. The interaction between GO, PEDOT-TMA and PMMA chains were characterized by using UV-Vis spectroscopy, X-ray diffraction, thermogravimetric analysis, Fourier transforms infrared spectroscopy, FT-Raman spectroscopy, atomic force microscopy (AFM) and scanning electron microscopy. The microstructure of composites shows that GO was homogeneously dispersed in the polymer matrix. AFM studies reveal an increase in surface roughness as a function of GO loading. A significant improvement in the thermal stability of composites was observed as a function of GO loading which is due to the presence of high surface area GO in the polymer matrix. The composites show high values of dielectric constant and low values of dielectric loss which resulted from homogeneous dispersion of GO in the polymer matrix. This study suggests that the composites have the potential to be used for suitable electronic applications with desired dielectric properties.

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Section: Dielectric Properties Of Pedot-tma/pmma/ Go Compositesmentioning

confidence: 97%

Embedded capacitor applications of graphene oxide reinforced poly(3,4-ethylenedioxythiophene)-tetramethacrylate (PEDOT-TMA) composites

Deshmukh

Joshi

2015

J Mater Sci: Mater Electron

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“…A similar study with polystyrene/foliated graphite has illustrated that a nonlinear-to-linear dependence in current-voltage characteristics of the composites was observed as the volume faction of graphite was increased over the percolation threshold (insulator-conductor transition) (Srivastava and Mehra 2008).…”

Section: High-voltage Stress Grading Materials and Conducting Nanocommentioning

confidence: 69%

Industrial Applications Perspective of Nanodielectrics

Tuncer¹,

Sauers²

2009

Dielectric Polymer Nanocomposites

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The field of nanodielectrics has had a significant impact on voltage endurance characteristics of electrical insulation. Improved time-tobreakdown behavior, resulting in reduced aging of insulation, and enhanced thermal stability are of considerable importance in industrial applications. This chapter discusses several specific aspects of nanodielectrics and their role in the future of electrical insulation and dielectric sciences. IntroductionOne should not forget that power technology-high-voltage apparatus, transmission, and most electrical components-could not exist without satisfactory electrical insulation. It is a challenging task to design and optimize an electrical insulation system while energy demand, voltage levels, and operating temperatures are either increasing in conventional applications or decreasing to cryogenic temperatures in superconducting applications. In addition, these * Research sponsored by the U.S. Department of Energy-Office of Electricity Delivery and Energy Reliability, Superconductivity Program for Electric Power Systems under contract DEAC05-00OR22725 with Oak Ridge National Laboratory, managed and operated by UT-Battelle, LLC.2 electrical components and equipment sizes are becoming smaller and more compact than conventional devices, placing greater demands on the insulation. New insulation materials are expected to have better endurance and to have better reliability than their conventional counterparts. Recent developments in composite materials filled with nanometer-size particles (defined here as particles in which at least one dimension is in the range 1-100 nm) have shown some interesting results, creating a new research field in electrical insulation being referred to as nanodielectrics (Lewis 1994;Lewis 2006;Nelson and Fothergill 2004;Cao et al. 2004).A detailed description of dielectrics for high-voltage applications was provided in earlier work by Dakin (1978). In this chapter, our discussion will focus on recent developments in the field of nanodielectrics. Only solid insulation materials composed of nanoparticle-loaded polymers will be considered here. The chapter is organized as follows. Different aspects of the nanodielectrics will be considered starting with the background and challenges faced in synthesizing nanocomposites. Some of the significant advantages of the nanodielectrics and their impact on electrical insulation industry are then discussed in the context of dielectric breakdown and voltage endurance. Nanodielectric applications at high and low temperatures together with specific device/component applications are discussed as well.

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“…These weak secondary forces allow small molecules, such as acids, to readily enter the graphite (intercalate) between the layers. Rapid heating of acid-intercalated graphite will vaporize the acids, generating enough force to break the van der Waals forces and separate the graphite into graphene [16,[20][21][22] . Separation of the layers is known as exfoliation, and is commonly performed in a furnace [23] or by using microwave irradiation [5,12,25,26] .…”

Section: Introductionmentioning

confidence: 99%

“…Graphite is a promising alternative filler particle because it is electrically conductive, easily obtained, and relatively inexpensive [15][16][17][18][19] . Graphite is composed of stacks of graphene, which are single sheets of hexagonally arranged carbon atoms.…”

Section: Introductionmentioning

confidence: 99%

“…Over the past decade, a great deal of research on compliant electrode materials has focused on two-phase composites comprising insulating polymer matrices with embedded conductive filler particles [1][2][3][4][5][6][7][8][9][10][11][12][13][14][15][16] . Some of the more commonly used conductive filler materials include carbon black (CB) [1,2] , carbon fibers [2] , multi-wall carbon nanotubes (MWNTs) [3][4][5][6][7][8] , and single wall carbon nanotubes (SWNTs) [9][10][11][12][13][14] .…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

PDMS/graphite stretchable electrodes for dielectric elastomer actuators

Kujawski

Pearse

Smela

2010

Electroactive Polymer Actuators and Devices (EAPAD) 2010

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Dielectric elastomer actuators (DEAs) consist of an elastomer sandwiched between two electrodes, and they undergo a large in-plane expansion upon the application of an electric field. They therefore require compliant electrodes that can stretch tens of percent. The most commonly used electrode material is carbon grease, which smears easily and is difficult to pattern. This paper outlines the fabrication and performance of a novel polydimethylsiloxane (PDMS) composite having a 15 wt% loading of exfoliated graphite (EG). This new material has a Young's modulus of only 0.9 MPa and a conductivity of 0.15 S/cm. Unlike other composite electrode materials, the Young's modulus of the PDMS/EG increases only slightly, by a factor of two, upon addition of the EG. Furthermore, the PDMS/EG composite is patternable and will not rub off. DEAs were fabricated with 20:1 PDMS as the elastomer using this new electrode material. The actuation strains were equal to those of 10:1 PDMS DEAs with carbon grease electrodes under the same electric field. Elastomer/EG composites may also find applications in areas such as flexible electronics, robotics, strain gauges, and sensors.

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Study of structural, electrical, and dielectric properties of polystyrene/foliated graphite nanocomposite developed via in situ polymerization

Cited by 51 publications

References 40 publications

Embedded capacitor applications of graphene oxide reinforced poly(3,4-ethylenedioxythiophene)-tetramethacrylate (PEDOT-TMA) composites

Embedded capacitor applications of graphene oxide reinforced poly(3,4-ethylenedioxythiophene)-tetramethacrylate (PEDOT-TMA) composites

Industrial Applications Perspective of Nanodielectrics

PDMS/graphite stretchable electrodes for dielectric elastomer actuators

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