A novel fabrication method of copper–reduced graphene oxide composites with highly aligned reduced graphene oxide and highly anisotropic thermal conductivity

Nazeer, Faisal; Ma, Zhuang; Xie, Yitong; Gao, Lihong; Malik, Abdul; Khan, Muhammad Abubaker; Wang, Fuchi; Li, Hezhang

doi:10.1039/c9ra03743h

Cited by 23 publications

(8 citation statements)

References 37 publications

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“…The excellent combination of these two layers results in the strong adhesion strength of the composite coating, which avoids the formation of cracks inside the coating, particularly at high temperatures. Furthermore, the different rGO/PVA layers could be separated by the BPF layer, avoiding the thermal conduction in the through-plane direction [ 37 ]. The layer distribution could preliminarily understand the heat transfer process.…”

Section: Resultsmentioning

confidence: 99%

Design and Preparation of Localized Heat-Resistant Coating

Lin

Chen²,

Ma³

et al. 2022

Polymers

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Localized heat sources, such as flame guns and high-energy lasers, can cause severe damage to conventional materials. In this study, a novel localized heat-resistant coating with a high in-plane thermal conductivity was designed and prepared. Reduced graphene oxide (rGO) effectively improved the in-plane thermal conductivity of the polyvinyl alcohol (PVA) film, while maintaining the thermal insulation of the resin matrix in the through-plane direction. This characteristic of the rGO/PVA film was combined with the thermal insulation of boron-modified phenolic resin (BPF), and the prepared composite coating with two layers of rGO/PVA films effectively lowered the back-surface temperature in the flame ablation test from 151 to 107 °C. In addition, the area of the ablation-affected region of coating was increased to 103.6 cm2 from 31.9 cm2, indicating an excellent heat transfer performance. The layer-by-layer structure could realize the compatibility of high in-plane thermal conductivity and good through-plane thermal insulation. The synergy of these two different characteristics is demonstrated to be the key to improving the localized heat-resistant performance of the composite coating. This study effectively expands the application range of high-conductive film, and the obtained coating could act as a shield against butane flame, high energy lasers, and other localized heat.

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Section: Resultsmentioning

confidence: 99%

Design and Preparation of Localized Heat-Resistant Coating

Lin

Chen²,

Ma³

et al. 2022

Polymers

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“…The maximum k of the GF/Cu composites is much higher than those of the C/Cu composites reported (Figure d) and twice that of Cu. In the case of conventional Cu matrix composites reinforced with graphene nanosheets, the k is generally lower than 500 W/m K. ,− ,− Therefore, a better strategy to use the nanocarbons of graphenes is to assemble them into a large-size material with a highly aligned microstructure, like the GFs used in this work, and to integrate them into the Cu matrix in order. We find that the k of the GF/Cu composites is also higher than those of the graphite flakes/Cu composites (<700 W/m K). − The comparison of k highlights the effectiveness of our strategy in Figure .…”

Section: Resultsmentioning

confidence: 99%

“…Thermal performance of the spirally layered GF/Cu composites: (a) thermal conductivities in different directions of the GF/Cu- x Zr composites as a function of Zr addition, (b) illustration of the radial and axial directions in the spirally layered GF/Cu composites, (c) schematic of the laser flash experimental setup for measuring the anisotropic thermal diffusivity of the GF/Cu composites, and (d) comparison of thermal conductivity with reported C/Cu composites as a function of volume fraction of graphene nanosheets ,− ,− or graphite flakes. − …”

Section: Resultsmentioning

confidence: 99%

“…However, since graphene has a high specific area, agglomeration would be inevitably generated during the dispersion process of graphene in the metal matrix even with an extremely low loading (0.5 wt %) . As a result, the disorder of graphene in the metal matrix would increase with increasing graphene content, which is hugely detrimental to the heat conduction of composites. , Currently, some strategies have been reported to improve the orientation of graphene in the Cu matrix, such as the vacuum filtration method followed by spark plasma sintering, the pulse electrodeposition (PED) method, and in situ catalytic growing of graphene on Cu microflakes followed by assembly of laminated composites . However, there is still much room for resolving the contradiction between alignment degree and loading content.…”

Section: Introductionmentioning

confidence: 99%

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Superior Thermal Conductivity of Graphene Film/Cu-Zr Alloy Composites for Thermal Management Applications

Guo

Wang

Zhang

et al. 2022

ACS Appl. Mater. Interfaces

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As the power density of electronic devices continuously increases, there is a growing demand to improve the heat conduction performance of thermal management materials for addressing heat dissipation issues. Single-/few-layer graphene is a promising candidate as a filler of a metal matrix due to its extremely high thermal conductivity (k); however, the well-arranged assembly of 2D-component graphene with a high volume fraction remains challenging. Herein, we integrated a novel graphene-based macroscopic material of graphene film (GF) into a Cu matrix by infiltrating molten Zr-microalloyed Cu into a spirally folded and upright-standing GFs skeleton. The microstructure of the GF/Cu composites was regulated by an interface modification strategy. The GF/Cu composites with a spirally layered microstructure exhibit a superior k of 820 W/m K in the axial direction, much higher than that of Cu-matrix composites reinforced with graphene nanosheets (generally <500 W/m K) and twice that of Cu. The thermal transfer mechanisms were investigated by experiments and theoretical calculations. The results reveal that the excellent performance is attributed to the construction of high-heat conduction channels and a positive coordinating effect at the Zr-modified GF/Cu interface. Meanwhile, the relation between interfacial microstructure and heat transfer is established in the composites using interfacial thermal resistance as a bridge. This work yields in-depth insight into the heat conduction mechanism in highly oriented structures and provides a promising solution for the thermal management issues of high-power electronics.

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“…Although, electrically insulating properties are vital for developing electric devices. [1][2][3][4] Polymeric materials possess excellent electric insulation properties, good moldability, and thermal insulating properties. So, polymeric materials can be used as heat-dissipating sheets if the thermal conductivity properties improve.…”

Section: Introductionmentioning

confidence: 99%

Thermal conductivity of polyurethane sheets containing beryllium oxide nanofibers

2022

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A novel fabrication method of copper–reduced graphene oxide composites with highly aligned reduced graphene oxide and highly anisotropic thermal conductivity

Abstract: Highly aligned rGO with anisotropic thermal conductivity was obtained in this work.

Cited by 23 publications

References 37 publications

Design and Preparation of Localized Heat-Resistant Coating

Design and Preparation of Localized Heat-Resistant Coating

Superior Thermal Conductivity of Graphene Film/Cu-Zr Alloy Composites for Thermal Management Applications

Thermal conductivity of polyurethane sheets containing beryllium oxide nanofibers

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