Epoxy Resin/Graphite Electrically Conductive Nanosheet Nanocomposite

Lu, Wei; Jian-xin, Weng; Wu, Dajun; Wu, Chen; Chen, Guohua

doi:10.1081/amp-200068663

Cited by 40 publications

(20 citation statements)

References 18 publications

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“…This result is fully consistent with the frequently reported trend that assemblies of oblate objects with high aspectratios entail a lower percolation threshold. For example, several studies of graphite-polymer composites reported a consistent lowering of the electrical conductivity percolation threshold when very high aspect-ratio graphite nanosheets [13,33,34] or graphene flakes [35] were used.…”

Section: Simulation Resultsmentioning

confidence: 98%

Percolative properties of hard oblate ellipsoids of revolution with a soft shell

et al. 2008

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We present an in-depth analysis of the geometrical percolation behavior in the continuum of random assemblies of hard oblate ellipsoids of revolution. Simulations were carried out by considering a broad range of aspect ratios, from spheres up to aspect-ratio-100 platelike objects, and with various limiting two-particle interaction distances, from 0.05 times the major axis up to 4.0 times the major axis. We confirm the widely reported trend of a consistent lowering of the hard particle critical volume fraction with increase of the aspect ratio. Moreover, by assimilating the limiting interaction distance to a shell of constant thickness surrounding the ellipsoids, we propose a simple relation based on the total excluded volume of these objects which allows us to estimate the critical concentration from a quantity that is quasi-invariant over a large spectrum of limiting interaction distances. Excluded volume and volume quantities are derived explicitly.

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Section: Simulation Resultsmentioning

confidence: 98%

Percolative properties of hard oblate ellipsoids of revolution with a soft shell

et al. 2008

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“…The use of graphite and/or exfoliated graphite (EG) has been extensively explored in order to produce conductive thermoplastic and/or thermosetting polymers with enhanced chemical and physical properties, [1][2][3][4][5][6][7] but a clear understanding concerning the optimal transfer of the ller properties to the polymer composite has not yet been achieved. The efforts of material designers have been focused on the use of exfoliated graphite based polymer especially in the area of lightweight materials.…”

Section: Introductionmentioning

confidence: 99%

Optimization of graphene-based materials outperforming host epoxy matrices

et al. 2015

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The degree of graphite exfoliation and edge-carboxylated layers can be controlled and balanced to design lightweight materials characterized by both low electrical percolation thresholds (EPT) and improved mechanical properties. So far, this challenging task has been undoubtedly very hard to achieve. The results presented in this paper highlight the effect of exfoliation degree and the role of edge-carboxylated graphite layers to give self-assembled structures embedded in the polymeric matrix. Graphene layers inside the matrix may serve as building blocks of complex systems that could outperform the host matrix. Improvements in electrical percolation and mechanical performance have been obtained by a synergic effect due to finely balancing the degree of exfoliation and the chemistry of graphene edges which favors the interfacial interaction between polymer and carbon layers. In particular, for epoxy-based resins including two partially exfoliated graphite samples, differing essentially in the content of carboxylated groups, the percolation threshold reduces from 3 wt% down to 0.3 wt%, as the carboxylated group content increases up to 10 wt%. Edge-carboxylated nanosheets also increase the nanofiller/epoxy matrix interaction, determining a relevant reinforcement in the elastic modulu

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“…Also, graphene or modified graphene in same amounts or less than carbon nanotubes are capable of forming conductive network [34]. In Graphene-resin epoxy nano composite, electrical conductance has been increased considerably (12 times) [46]. In specified amount of nano particle called as percolation threshold, nano particle is capable to form network structure.…”

Section: Electricity Current Conductancementioning

confidence: 99%

Graphene-reinforced polymeric nanocomposites in computer and electronics industries

2020

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Graphene is the newest member of the multidimensional graphite carbon family. Graphene is a two-dimensional atomic crystal formed by the arrangement of carbon atoms in the hexagonal network. It is the most rigid and thinnest material ever discovered and has a wide range of uses regarding its unique characteristics. It is expected that this material will create a revolution in the electronics industry. Graphene is a very powerful superconductor as the movability of charged particles is high on it, and additionally, because of the high surface energy and ? electrons being free, graphene can be used in manufacturing many electronics devices. In this paper, the applications of graphene nanoparticles reinforced polymer nanocomposites in the computer and electronics industry are investigated. These nanoparticles have received much attention from researchers and craftsmen, because graphene has unique thermal, electrical and mechanical properties. Its use as a filler in very small quantities substantially enhances the properties of nanocomposites. There are various methods for producing graphene-reinforced polymer nanocomposites. These methods affect the amount of graphene dispersion within the polymer substrate and the final properties of the composite. The application and the properties of graphene-reinforced polymer nanocomposites are discussed along with examples of results published in the papers. To better understand such materials, the applications of these nanocomposites have been investigated in a variety of fields, including batteries, capacitors, sensors, solar cells, etc., and the barriers to the growth and development of these materials application as suggested by the researchers are discussed. As the use of these nanocomposites is developing and many researchers are interested in working on it, the need to study and deal with these substances is increasingly felt.

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Epoxy Resin/Graphite Electrically Conductive Nanosheet Nanocomposite

Cited by 40 publications

References 18 publications

Percolative properties of hard oblate ellipsoids of revolution with a soft shell

Percolative properties of hard oblate ellipsoids of revolution with a soft shell

Optimization of graphene-based materials outperforming host epoxy matrices

Graphene-reinforced polymeric nanocomposites in computer and electronics industries

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