Temperature dependence of the electrical conductivity of epoxy/expanded graphite nanosheet composites

Jovic, N.; Dudić, Duško; Montone, A.; Antisari, M. Vittori; Mitrić, Miodrag; Djoković, Vladimir

doi:10.1016/j.scriptamat.2007.12.041

Cited by 100 publications

(60 citation statements)

References 17 publications

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“…The conductivity of the composites depends on the characteristics of the fillers and polymers, the diameter and structure of fillers, the concentration of fillers, the states of dispersion, the processing methods, the processing temperature, and the processing pressure. The change in electrical conductivity with increasing concentrations of an electrically conducting filler is known to be non-linear [72]. The conductive composites are characterized by a percolation threshold or a critical value at which the conductivity as a function of filler content starts to increase.…”

Section: Hybrid Polymer Composites and Synergy Effectmentioning

confidence: 99%

Synergy in hybrid polymer/nanocarbon composites. A review

Szeluga

Kumanek

Trzebicka

2015

Composites Part A: Applied Science and Manufacturing

297

184

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Section: Hybrid Polymer Composites and Synergy Effectmentioning

confidence: 99%

Synergy in hybrid polymer/nanocarbon composites. A review

Szeluga

Kumanek

Trzebicka

2015

Composites Part A: Applied Science and Manufacturing

297

184

View full text Add to dashboard Cite

“…Other researchers have also observed this phenomena for similar EG/epoxy systems, and have found improved conductivities with an increase in EG content, 20 as well as low percolation thresholds for EG concentrations of $ 3 wt %. 21 A high aspect ratio and a good dispersion are key factors to obtain high-K and low loss composites. Figure 7 displays plots of loss tangent versus frequency for the studied materials.…”

Section: Dielectric Properties Of the Eg/epoxy Compositesmentioning

confidence: 99%

Expanded graphite–epoxy composites with high dielectric constant

Xie

Chen

et al. 2009

J of Applied Polymer Sci

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Composites of an expanded graphite/diglycidyl ether of bisphenol A (DGEBA) were prepared by a simple melt blending method, and their dielectric and mechanical properties were investigated. During observations of fractured surfaces of the composites, the graphite sheets were seen to be homogeneously dispersed in the epoxy matrix. Moreover, the composites presented an enhanced dielectric constant ($ 180) and a low loss factor ($ 0.05) at 50 Hz, suggesting their potential suitability for embedded dielectric applications. The enhanced dielectric constant can be explained by the percolation theory and the relatively low loss factor was attributed to strong interfacial interactions between the polymer molecules and the AOH/ACOOH groups of the expanded graphite, which constrained the orientational polarization of the polarons. Furthermore, dynamic mechanical analysis of the composites showed a restricted macromolecular relaxation and improved mechanical properties.

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“…The most studied polymer nanocomposites are composed of thermoplastic or thermosetting matrix, clay [1][2][3][4][5][6][7], or carbon nanotubes (CNTs) and graphene nanoplatelets [8][9][10][11][12][13][14][15][16][17][18][19][20][21].…”

Section: Introductionmentioning

confidence: 99%

Preparation and Characterization of EG-Chitosan Nanocomposites via Direct Exfoliation: A Green Methodology

et al. 2015

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Abstract:In this study, free-standing expanded graphite chitosan (EG-chitosan) nanocomposite films have been prepared using a novel green and simple preparation method, starting from a commercial expandable graphite (GIC). The in situ exfoliation of GIC by a solvent-free sonication method was monitored as a function of the process parameters using X-ray diffraction (XRD), transmission electron microscopy (TEM), dynamic light scattering (DLS) and UV-visible transmittance (UV-VIS) analyses. The optimal process parameters were selected in order to obtain an efficient dispersion of EG in chitosan solutions. The effective EG amount after the in situ exfoliation was also determined by thermogravimetric analyses.

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Temperature dependence of the electrical conductivity of epoxy/expanded graphite nanosheet composites

Cited by 100 publications

References 17 publications

Synergy in hybrid polymer/nanocarbon composites. A review

Synergy in hybrid polymer/nanocarbon composites. A review

Expanded graphite–epoxy composites with high dielectric constant

Preparation and Characterization of EG-Chitosan Nanocomposites via Direct Exfoliation: A Green Methodology

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