Investigating thermal conductivities of functionalized graphene and graphene/epoxy nanocomposites

Wang, Tai Yuan; Tsai, Jia-Lin

doi:10.1016/j.commatsci.2016.05.039

Cited by 74 publications

(31 citation statements)

References 36 publications

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“…It is well understood that chemical functionalization at the interface is an efficient way to strengthen the heat transfer across SLG and the matrix. [18][19][20]41 Furthermore, it should be noted that interlayer coupling is of great importance with respect to the thermal transport across MLG and the matrix, and interlayer functionalization might be an additional approach to reduce the interfacial thermal resistance. The results could be useful for the experimental endeavors in preparing graphene-based composites with high thermal conductivity values.…”

mentioning

confidence: 99%

Enhanced thermal transport across multilayer graphene and water by interlayer functionalization

Cao

Zou

et al. 2018

Applied Physics Letters

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Graphene has attracted enormous attention due to its extraordinary physical properties, which have potential for increasing the thermal conductivity of nanocomposites or nanofluids, and the thermal resistance between graphene and the surrounding matrices arises as an important issue. In this paper, the thermal transport at the graphene-water interface is investigated by molecular dynamics simulations. The interfacial thermal resistance decreases with the graphene layer number. Interlayer functionalization by oxygen atoms is applied to tune the interfacial thermal resistance. A peak thermal resistance reduction of nearly 50% is generated with the oxygen ratio of only 0.5% for two-layer graphene. Based on the analyses of vibrational density of states, it is found that lower thermal resistance is consistent with more vibrational density of states overlaps at the interface. Our results are instructive for improving the interfacial thermal transport in graphene-based nanocomposites and nanofluids.

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mentioning

confidence: 99%

Enhanced thermal transport across multilayer graphene and water by interlayer functionalization

Cao

Zou

et al. 2018

Applied Physics Letters

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“…Moreover, the reduction degree of the RGO is closely related to the resulting thermal performances. Wang’s group had proven that the functional groups of graphene can reduce the phonon mismatch and enhance the thermal transport efficiency between the graphene basal plane and the ER in the theory [ 26 ]. Our group reported the relationship between the total amount of functional groups of the RGO and the resulting thermal conductivity of the RGO-ER [ 19 ].…”

Section: Resultsmentioning

confidence: 99%

Graphene-Assisted Thermal Interface Materials with a Satisfied Interface Contact Level Between the Matrix and Fillers

Huang

et al. 2018

Nanoscale Res Lett

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Reduced graphene oxide (RGO) and three-dimensional graphene networks (3DGNs) are adopted to improve the performance of thermal interface materials (TIMs). Therein, the 3DGNs provide a fast transport network for phonons, while the RGO plays as a bridge to enhance the phonon transport ability at the interface between the filler and matrix. The types of surface functional groups of the RGO are found to exert a remarkable influence on the resulting thermal performance; the carboxyl groups are found in the optimal selection to promote the transport process at the interface area because a strong chemical bond will form between the graphene basal plane and epoxy resin (ER) through this kind of group. The resulting thermal conductivity reaches 6.7 Wm−1 K−1 after optimizing the mass fraction and morphology of the filler, which is 3250% higher than that of the pristine ER. Moreover, the mechanical properties of these as-prepared TIMs are also detected, and the specimens by using the RGO(OOH) filler display the better performances.Electronic supplementary materialThe online version of this article (10.1186/s11671-018-2704-1) contains supplementary material, which is available to authorized users.

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“…Li et al [50] also reported that the treatment of the graphite with UV/O 3 did not have an influence on the thermal conductivity of the resulting composite materials. On the contrary, Wang and Tsai [20] reported that functionalized fillers exhibited superior thermal enhancements more than pristine filler. This was attributed to the increase in interfacial thermal conductivity (ITC) between the filler and the host matrix.…”

Section: Impact Of Thermal Conductivity On Energy Technologiesmentioning

confidence: 97%

“…These methods afford defect-free material with excellent physical properties; however, the yield is not large enough for use as a composite filler. The thermal conductivity of graphene ranges between 600 and 5000 W m À1 K À1 with Young modulus of 1 TPa and a tensile strength of 130 GPa [20].…”

Section: Modification Of Graphitementioning

confidence: 99%

Thermal Conductivity of Graphite-Based Polymer Composites

Mokhena¹,

Mochane²,

Sefadi³

et al. 2018

Impact of Thermal Conductivity on Energy Technologies

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It is well known that polymers are insulators, which limit their usage in other applications where thermal conductivity is essential for heat to be efficiently dissipated or stored. In the past, the improvement in the thermal conductivity of polym.rs with conductive fillers has been investigated by researchers. Carbon-based materials such as graphite, graphene and carbon nanotube, which feature excellent properties such as a high mechanical strength, a high thermal conductivity and a tailorable electronic configuration, have been added to different polymer matrices to enhance their thermal conductivity. Amongst others, graphite more especially expanded graphite merits special interest because of its abundant availability at a relatively low cost and lightweight when compared to other carbon allotropes. Herein, we describe the thermal conductivity of polymer/graphite composites and their applications.

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Investigating thermal conductivities of functionalized graphene and graphene/epoxy nanocomposites

Cited by 74 publications

References 36 publications

Enhanced thermal transport across multilayer graphene and water by interlayer functionalization

Enhanced thermal transport across multilayer graphene and water by interlayer functionalization

Graphene-Assisted Thermal Interface Materials with a Satisfied Interface Contact Level Between the Matrix and Fillers

Thermal Conductivity of Graphite-Based Polymer Composites

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