Thermal and Electrical Properties of Nanocomposites Based on Self‐Assembled Pristine Graphene

Bento, Jennifer L.; Brown, Elizabeth E.B.; Woltornist, Steven J.; Adamson, Douglas H.

doi:10.1002/adfm.201604277

Cited by 33 publications

(42 citation statements)

References 31 publications

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“…Previous studies on the thermal conductivity of TIMs indicated that the alignment of thermally conductive fillers can make the best of the extraordinarily high in-plane thermal conductivity of BN, CNT, graphene and graphite, and so on [26][27][28]. Substantial researches have focused on fabricating paper-like composites with high in-plane thermal conductivity and low through-plane thermal conductivity [29][30][31][32][33].…”

Section: Introductionmentioning

confidence: 99%

Electrically insulating POE/BN elastomeric composites with high through-plane thermal conductivity fabricated by two-roll milling and hot compression

Feng

Bai

Bao

et al. 2017

Adv Compos Hybrid Mater

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In this work, we reported a kind of electrical insulating, highly through-plane thermally conductive polyolefin elastomer (POE)-based composites filled with commercial boron nitride (BN) fabricated by a conventional melt-mixing method of two-roll milling, followed by hot compression and mechanical cutting. The as-fabricated composites with BN flakes perfectly aligning vertically in the matrix revealed high through-plane thermal conductivity (6.94 W m −1 K −1 at a BN content of 43.75 vol%), outstanding electrical insulation (4.34× Ω cm at a BN content of 43.75 vol%), and quite good mechanical properties. This fabrication procedure features facile process, industrial equipment, and easy industrialization, and the as-prepared composites with outstanding comprehensive performance are promising for thermal interface materials (TIMs) application.

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Section: Introductionmentioning

confidence: 99%

Electrically insulating POE/BN elastomeric composites with high through-plane thermal conductivity fabricated by two-roll milling and hot compression

Feng

Bai

Bao

et al. 2017

Adv Compos Hybrid Mater

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“…In recent years, polymer composites using graphene derivatives as filler have been studied with the aim of practical application in a wide range of academic and industrial fields [ 1 , 2 , 3 , 4 , 5 ]. In addition to their superior mechanical and electrical properties, because of the advantage of easily granting suitable physical and chemical characteristics for specific purposes, utilizing them as materials with excellent future prospects has been attracting much attention [ 6 , 7 , 8 , 9 , 10 , 11 , 12 , 13 , 14 , 15 ]. However, graphene as a filler component has a tendency to readily aggregate, and this becomes a major disadvantage in that it is difficult to conjugate its inherently excellent properties.…”

Section: Introductionmentioning

confidence: 99%

Thermomechanical Behavior of Polymer Composites Based on Edge-Selectively Functionalized Graphene Nanosheets

2017

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In this study, we demonstrate an effective approach based on a simple processing method to improve the thermomechanical properties of graphene polymer composites (GPCs). Edge-selectively functionalized graphene (EFG) was successfully obtained through simple ball milling of natural graphite in the presence of dry ice, which acted as the source of carboxyl functional groups that were attached to the peripheral basal plane of graphene. The resultant EFG is highly dispersible in various organic solvents and contributes to improving their physical properties because of its unique characteristics. Pyromellitic dianhydride (PMDA) and 4,4′-oxydianiline (ODA) were used as monomers for constructing the polyimide (PI) backbone, after which PI/EFG composites were prepared by in situ polymerization. A stepwise thermal imidization method was used to prepare the PI films for comparison purposes. The PI/EFG composite films were found to exhibit reinforced thermal and thermo-mechanical properties compared to neat PI owing to the interaction between the EFG and PI matrix.

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“…Owing to inherent 2D structure, high electrical/thermal conductivity, and superstrong mechanical properties along basal plane, the promising applications of graphene are anticipated as a macroscopic thin film for coatings, composites, flexible electrodes, sensors, and so on . Currently, the preparation of graphene thin film relies principally on chemical vapor deposition growth on metal surface, followed by transferring it onto desired substrate .…”

mentioning

confidence: 99%

Wetting‐Induced Climbing for Transferring Interfacially Assembled Large‐Area Ultrathin Pristine Graphene Film

et al. 2019

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Owing to inherent 2D structure, high electrical/thermal conductivity, and superstrong mechanical properties along basal plane, [1] the promising applications of graphene are anticipated as a macroscopic thin film for coatings, [2] composites, [3] flexible electrodes, [4] sensors, [5] and so on. [6] Currently, the preparation of graphene thin film relies principally on chemical vapor deposition growth on metal surface, followed by transferring it onto desired substrate. [7] Chemical vapor deposition growth can provide large-area uniform graphene thin film. Nevertheless, vacuum processing at high temperature requires expensive and precise equipment, as well as long batch times. The transfer process is complex and often involves multiple steps, including sacrificial polymer layer immobilization, metal etching, transfer, drying, and sacrificial polymer removal. [8] An alternative strategy to prepare graphene thin film is the direct processing of graphene oxide dispersion on target substrates through conventional solution methods, [9] such as drop casting, [10] spin coating, [11] rod coating, [12] spray coating, [13] or dip coating, [14] followed by chemical reduction and/or thermal annealing. Although some of these methods might be scaled up potentially, the fabrication of graphene film with nanometer-scale control of thickness and uniformity over large area remain a challenge.With the development of solvent exfoliation techniques, it is firmly established that graphite can be directly exfoliated into large-volume, defect-free, few-layer graphene dispersion in low-volatile, polar organic solvent, such as N-methyl-2-pyrrolidone (NMP). [15] The mass exfoliation provides the premise for cost-effective production of graphene-based ultrathin film from pristine graphene. However, conventional solution processing methods are not suitable for the solvent-exfoliated graphene dispersion because of preferred aggregation in the following drying process. Therefore, further research efforts should be made to develop new processing technique that can convert solvent-exfoliated pristine graphene dispersion into macroscopic thin film on desired substrates. [16] Liquid interface provides an ideal platform for assisting in the formation of uniform thin film assembled by graphene nanoplatelets, [16a,17] delicately avoiding of graphene aggregation issue during drying dispersion. In this study, we design a robust wetting-induced climbing strategy to transfer interfacially assembled large-area ultrathin pristine graphene film. Once Owing to inherent 2D structure, marvelous mechanical, electrical, and thermal properties, graphene has great potential as a macroscopic thin film for surface coating, composite, flexible electrode, and sensor. Nevertheless, the production of large-area graphene-based thin film from pristine graphene dispersion is severely impeded by its poor solution processability. In this study, a robust wetting-induced climbing strategy is reported for transferring the interfacially assembled large-area ultrathin pri...

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Thermal and Electrical Properties of Nanocomposites Based on Self‐Assembled Pristine Graphene

Cited by 33 publications

References 31 publications

Electrically insulating POE/BN elastomeric composites with high through-plane thermal conductivity fabricated by two-roll milling and hot compression

Electrically insulating POE/BN elastomeric composites with high through-plane thermal conductivity fabricated by two-roll milling and hot compression

Thermomechanical Behavior of Polymer Composites Based on Edge-Selectively Functionalized Graphene Nanosheets

Wetting‐Induced Climbing for Transferring Interfacially Assembled Large‐Area Ultrathin Pristine Graphene Film

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