Thermal Transport in 3D Nanostructures

Zhan, Haifei; Nie, Yihan; Chen, Yongnan; Bell, John; Gu, Yuantong

doi:10.1002/adfm.201903841

Cited by 88 publications

(47 citation statements)

References 349 publications

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“…[ 29–31 ] And more effective thermal conductivity enhancement can be achieved by modulating the graphene framework to form a highly ordered and anisotropic structure instead of random arrangement. [ 16,32 ] It can be attributed to the fact that the thermal conductivity of graphene is highly anisotropic, having an excellent capability to transfer heat along the basal plane, but poor along its cross‐plane direction. [ 33,34 ] Current methods for the development of anisotropic graphene frameworks using graphene sheets, such as graphene oxide (GO), reduced GO (rGO), or graphite nanoplatelets (GNPs), can be typically divided into two approaches: the directional‐freezing of rGO aqueous dispersion and self‐assembly of GO liquid crystals.…”

Section: Introductionmentioning

confidence: 99%

Multiscale Structural Modulation of Anisotropic Graphene Framework for Polymer Composites Achieving Highly Efficient Thermal Energy Management

et al. 2021

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Graphene is usually embedded into polymer matrices for the development of thermally conductive composites, preferably forming an interconnected and anisotropic framework. Currently, the directional self‐assembly of exfoliated graphene sheets is demonstrated to be the most effective way to synthesize anisotropic graphene frameworks. However, achieving a thermal conductivity enhancement (TCE) over 1500% with per 1 vol% graphene content in polymer matrices remains challenging, due to the high junction thermal resistance between the adjacent graphene sheets within the self‐assembled graphene framework. Here, a multiscale structural modulation strategy for obtaining highly ordered structure of graphene framework and simultaneously reducing the junction thermal resistance is demonstrated. The resultant anisotropic framework contributes to the polymer composites with a record‐high thermal conductivity of 56.8–62.4 W m−1 K−1 at the graphene loading of ≈13.3 vol%, giving an ultrahigh TCE per 1 vol% graphene over 2400%. Furthermore, thermal energy management applications of the composites as phase change materials for solar‐thermal energy conversion and as thermal interface materials for electronic device cooling are demonstrated. The finding provides valuable guidance for designing high‐performance thermally conductive composites and raises their possibility for practical use in thermal energy storage and thermal management of electronics.

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Section: Introductionmentioning

confidence: 99%

Multiscale Structural Modulation of Anisotropic Graphene Framework for Polymer Composites Achieving Highly Efficient Thermal Energy Management

et al. 2021

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“…2 Different kinds of paraffins have many advantages such as high latent heat, low cost, and excellent melting temperature range, but an important disadvantage is their low thermal conductivity. 3 Using high thermal conductive nanoparticles 4 can ameliorate this defect. 5 Qu et al 6 studied the effect of a hybrid of expanded graphite (EG) and multi-walled carbon nanotube (MWCNT) on the thermal conductivity enhancement of paraffin.…”

Section: Introductionmentioning

confidence: 99%

Investigating the effects of adding hybrid nanoparticles, graphene and boron nitride nanosheets, to octadecane on its thermal properties

et al. 2020

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“…Graphene possesses outstanding mechanical, physical, and electrical properties (Strankowski et al, 2015), which provides an enhancement in the thermal properties leading to a faster thermal response and better heat propagation through the polymeric material. The influence of graphene on the thermal properties of polymers is attracting the attention of many researchers and graphene three-dimensional (3D) nanostructures shed light on the thermal management at nanoscale (Zhan et al, 2020). These excellent properties make graphene and its derivative compounds like graphene oxide (GO) ideal fillers in polymer composites.…”

Section: Introductionmentioning

confidence: 99%

How graphene oxide affects shape memory properties and strength of poly(l-lactide-co-ε-caprolactone)

Zhang

Yang

Leng

2020

Journal of Intelligent Material Systems and Structures

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Poly( l-lactide-co-ε-caprolactone) is an environment-friendly shape memory polymer. Molecular dynamics method was used to study the shape memory effect and mechanical properties of graphene oxide–reinforced poly( l-lactide-co-ε-caprolactone) to understand the microscopic mechanism. Two models containing dispersed graphene oxide were constructed. It is shown that the addition of graphene oxide causes the glass transition temperature of material to rise because of limitation on polymer activity. The uniaxial tensile properties of the composites were studied. The results exhibited that strength of composites depend on the interface state of the polymer and graphene oxide. The strength of the composite with covalent bond is much higher than that of another without the covalent bond between graphene oxide and poly( l-lactide-co-ε-caprolactone) generated. Stress softening effect was observed in the cross-linked composite in the glass state. Their uniaxial tension thermodynamic cycles were carried out to consider the shape memory effect of the composites. It is shown that graphene oxide–reinforced composites with different interactions exhibit fair shape memory effect in the direction of paralleling graphene oxide surface. In terms of the direction perpendicular to graphene oxide sheet, the fixed ratios of the composites decrease slightly about 1.64%–3.63%, and the recovery ratios of the composites with the covalent bond are higher than others about 3.22%–12.93%.

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Thermal Transport in 3D Nanostructures

Cited by 88 publications

References 349 publications

Multiscale Structural Modulation of Anisotropic Graphene Framework for Polymer Composites Achieving Highly Efficient Thermal Energy Management

Multiscale Structural Modulation of Anisotropic Graphene Framework for Polymer Composites Achieving Highly Efficient Thermal Energy Management

Investigating the effects of adding hybrid nanoparticles, graphene and boron nitride nanosheets, to octadecane on its thermal properties

How graphene oxide affects shape memory properties and strength of poly(l-lactide-co-ε-caprolactone)

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