Modelling of exfoliated graphite

Celzard, Alain; Marêché, J.F.; Furdin, G.

doi:10.1016/j.pmatsci.2004.01.001

Cited by 260 publications

(150 citation statements)

References 126 publications

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“…Graphene layers in natural/ synthetic graphite are stacked parallel on top of each other with a separation of 3.35 Å. 30 Although attraction between layers is not strong enough to prevent sliding in the direction of the c axis, they are sufficient to make it hard to exfoliate them as a single graphene sheet. Overcoming the van der Waals interactions is crucial for separation of the layers to produce single-layer graphene.…”

Section: Chemical Intercalationmentioning

confidence: 99%

Chemically converted graphene: scalable chemistries to enable processing and fabrication

et al. 2015

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Graphene, a nanocarbon with exceptional physical and electronic properties, has the potential to be utilized in a myriad of applications and devices. However, this will only be achieved if scalable, processable forms of graphene are developed along with ways to fabricate these forms into material structures and devices. In this review, we provide a comprehensive overview of the chemistries suitable for the development of aqueous and organic solvent graphene dispersions and their use for the preparation of a variety of polymer composites, materials useful for the fabrication of graphene-containing structures and devices. Fabrication of the processable graphene dispersions or composites by printing (inkjet and extrusion) or spinning methods (wet) is reviewed. The preparation and fabrication of liquid crystalline graphene oxide dispersions whose unique rheologies allow the creation of graphene-containing structures by a wide range of industrially scalable fabrication techniques such as spinning (wet and dry), printing (ink-jet and extrusion) and coating (spray and electrospray) is also reviewed.

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Section: Chemical Intercalationmentioning

confidence: 99%

Chemically converted graphene: scalable chemistries to enable processing and fabrication

et al. 2015

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“…In particular, mechanical percolation has been notable in composites contain-ing high aspect ratio fillers, as well as frequently observed in nanocomposites, see for example [18]- [21].…”

Section: Chapter 2 Background and Review Of The Literaturementioning

confidence: 98%

Three-dimensional evolution of mechanical percolation in nanocomposites with random microstructures

Fralick

2012

Probabilistic Engineering Mechanics

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“…This sheet is resilient in the direction perpendicular to the sheet, due to the cellular structure of exfoliated graphite and the preferred orientation of the graphite layers in the plane of the sheet. [25][26][27] The sheet is known as ''flexible graphite. '' 28,29 The resiliency helps the conformability, though the conformability of flexible graphite is low compared with that of high-performance thermal paste.…”

Section: Introductionmentioning

confidence: 99%

Solder–Graphite Network Composite Sheets as High-Performance Thermal Interface Materials

Sharma

Chung

2015

Journal of Elec Materi

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Low-cost solder-graphite composite sheets ( ‡55 vol.% solder), with solder and graphite forming interpenetrating networks to a degree, are excellent thermal interface materials (TIMs). Solders 63Sn-37Pb and 95.5Sn-4Ag-0.5Cu are separately used, with the latter performing better. In composite fabrication, a mixture of micrometer-size solder powder and ozone-treated exfoliated graphite is compressed to form a graphite network, followed by fluxless solder reflow and subsequent hot pressing to form the solder network. The network connectivity (enhanced by ozone treatment) is lower in the through-thickness direction. The electrical conductivity obeys the rule of mixtures (parallel model in-plane and series model through-thickness), with anisotropy 7. Thermal contact conductance £26 9 10 4 W/(m 2 K) (with 15-lm-roughness copper sandwiching surfaces), through-thickness thermal conductivity £52 W/ (m K), and in-plane thermal expansion coefficient 1 9 10 À5 /°C are obtained. The contact conductance exceeds or is comparable to that of all other TIMs, provided that solder reflow has occurred and the composite thickness is £100 lm. Upon decreasing the thickness below 100 lm, the sandwich thermal resistivity decreases abruptly, the composite through-thickness thermal conductivity increases abruptly to values comparable to the calculated values based on the rule of mixtures (parallel model), and the composite-copper interfacial thermal resistivity (rather than the composite resistivity) becomes dominant.

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Modelling of exfoliated graphite

Cited by 260 publications

References 126 publications

Chemically converted graphene: scalable chemistries to enable processing and fabrication

Chemically converted graphene: scalable chemistries to enable processing and fabrication

Three-dimensional evolution of mechanical percolation in nanocomposites with random microstructures

Solder–Graphite Network Composite Sheets as High-Performance Thermal Interface Materials

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