Enhancing the Heat Transfer Efficiency in Graphene–Epoxy Nanocomposites Using a Magnesium Oxide–Graphene Hybrid Structure

Du, Feipeng; Yang, Wei‐En; Zhang, Fang; Tang, Chak Yin; Liu, Shengpeng; Le, Yin; Law, Wing Cheung

doi:10.1021/acsami.5b03196

Cited by 94 publications

(33 citation statements)

References 45 publications

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“…In addition to surface functionalization using organic molecules, inorganic MgO has also been successfully coated on the surface of graphene using a simple chemical precipitation method to enhance the interfacial thermal conductivity, where MgO served as an effective interface to strengthen the interfacial adhesion between the MgO and the epoxy matrix [210]. Non-covalent modification of h-BN nanoparticles with PDA could bring about a higher thermal conductivity of bisphenol-E-cyanate-ester based composites than that without surface functionalization [211].…”

Section: ) 2d Fillers (Graphene and Boron Nitride)mentioning

confidence: 99%

Thermal conductivity of polymers and polymer nanocomposites

Huang

Qian

Yang

2018

Materials Science and Engineering: R: Reports

648

391

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Polymers are widely used in industry and in our daily life because of their diverse functionality, light weight, low cost and excellent chemical stability. However, on some applications such as heat exchangers and electronic packaging, the low thermal conductivity of polymers is one of the major technological barriers. Enhancing the thermal conductivity of polymers is important for these applications and has become a very active research topic over the past two decades. In this review article, we aim to: 1). systematically summarize the molecular level understanding on the thermal transport mechanisms in polymers in terms of polymer morphology, chain structure and inter-chain coupling; 2). highlight the rationales in the recent efforts in enhancing the thermal conductivity of nanostructured polymers and polymer nanocomposites. Finally, we outline the main advances, challenges and outlooks for highly thermal-conductive polymer and polymer nanocomposites. the inter-chain coupling. Fig. 1 Schematic diagrams of a polymer: (a) the morphology of a polymer consisting of crystalline and amorphous domains; (b) structure of a polymer chain.In addition to engineering the morphology of polymer chains, another common method to enhance the thermal conductivity of polymers is to blend polymers with highly thermal conductive fillers. The progress of nanotechnology over the last two decades not only provides more diverse high thermal conductivity fillers of different material types and topological shapes but also advances the understanding at the nanoscale. Fig. 2 shows a sketch of a polymer nanocomposite to illustrate the thermal transport mechanisms. In general, there are two types of polymer nanocomposites depending on whether nano-fillers form a network or not. When the filler concentration is low, no inter-filler networks could be formed, as shown in Fig. 2(a). The thermal conductivity is essentially determined by the filler-matrix coupling, i.e, interfacial thermal resistance, and the concentration and the geometric shapes of fillers. When the filler concentration is large enough, high conductivity fillers might form thermally conductive networks, as shown in Fig. 2(b). Although nanocomposites with filler network could possess a higher thermal conductivity than that without a network, their thermal conductivity could still be low due to the large inter-filler thermal contact resistance. Recently, three-dimensional fillers, such as carbon and graphene foams, have drawn a lot of attention. The fundamental thermal transport mechanisms and recent synthesis efforts in both types of nanocomposites are reviewed.This review article is organized as follows. In Section 2, we introduce the experimental progress on the enhancement of thermal conductivity by aligning polymer chains, and then review the methods to further tune the thermal conductivity by engineering chain structure and inter-chain coupling, as illustrated in Fig. 3(a). In Section 3, we discuss the thermal conductivity of polymer nanocomposites both with and without inter...

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Section: ) 2d Fillers (Graphene and Boron Nitride)mentioning

confidence: 99%

Thermal conductivity of polymers and polymer nanocomposites

Huang

Qian

Yang

2018

Materials Science and Engineering: R: Reports

648

391

View full text Add to dashboard Cite

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“…Three different types of hybrid fillers in polymer matrices have been widely reported in the literature. These include using CNTs with nanoparticles [12,13], graphene or GNPs with nanoparticles [14][15][16][17] and CNTs with graphene or GNPs [18][19][20][21][22][23][24]. The use of other types of nanotubes and nanoplatelets in a polymer matrix composite has also been reported [25].…”

Section: Introductionmentioning

confidence: 99%

Design and development of thermally conductive hybrid nano‐composites in polysulfone matrix

et al. 2018

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A percolating network of hybrid fillers can provide significant synergic enhancement of thermal conductivity in polymer matrix composites. Especially, when platelets and fibers of high aspect ratios are mixed to form a percolating network, the percolation thresholds are small. However, the optimum ratio of platelets to fibers must be acquired for the maximum synergic enhancement. In this work, polysulfone (PSU) matrix‐hybrid fillers composite is designed with high thermal conductivity using a computational model. The calibration of computational model with several experimentally measured thermal conductivities of polymer matrix‐hybrid nanocomposites leads to the composition where maximum synergic effect/maximum thermal conductivity is expected. For the specific PSU–Graphene nano‐platelets (GNPs)/Carbon nano‐tubes (CNTs) hybrid composites synthesized in this study, the composition with maximum thermal conductivity as designed by the model is PSU/8.4% GNPs/1.6% CNTs. The samples produced experimentally around this composition have shown close agreement with the predictions of the model. Sensitivity analyses and parametric studies conducted on the model highlight that the dimensional parameters and the interface resistance of the fillers are the most sensitive to enhance the effective thermal conductivity. POLYM. COMPOS., 40:1419–1432, 2019. © 2018 Society of Plastics Engineers

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“…There have been recent reports depicting nanocomposites as heat transfer efficient materials and adsorbents of organic dyes, etc. [35][36][37] These few reports have covered only the limited physical and chemical aspects of MgO and graphene family nanocomposites. There is much potential in the area for the future work.…”

Section: Introductionmentioning

confidence: 99%

Graphene nanoplatelets induced tailoring in photocatalytic activity and antibacterial characteristics of MgO/graphene nanoplatelets nanocomposites

Arshad

Iqbal

Siddiq

et al. 2017

Journal of Applied Physics

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The synthesis, physical, photocatalytic, and antibacterial properties of MgO and graphene nanoplatelets (GNPs) nanocomposites are reported. The crystallinity, phase, morphology, chemical bonding, and vibrational modes of prepared nanomaterials are studied. The conductive nature of GNPs is tailored via photocatalysis and enhanced antibacterial activity. It is interestingly observed that the MgO/GNPs nanocomposites with optimized GNPs content show a significant photocatalytic activity (97.23% degradation) as compared to bare MgO (43%) which makes it the potential photocatalyst for purification of industrial waste water. In addition, the effect of increased amount of GNPs on antibacterial performance of nanocomposites against pathogenic micro-organisms is researched, suggesting them toxic. MgO/GNPs 25% nanocomposite may have potential applications in waste water treatment and nanomedicine due its multifunctionality.

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Enhancing the Heat Transfer Efficiency in Graphene–Epoxy Nanocomposites Using a Magnesium Oxide–Graphene Hybrid Structure

Cited by 94 publications

References 45 publications

Thermal conductivity of polymers and polymer nanocomposites

Thermal conductivity of polymers and polymer nanocomposites

Design and development of thermally conductive hybrid nano‐composites in polysulfone matrix

Graphene nanoplatelets induced tailoring in photocatalytic activity and antibacterial characteristics of MgO/graphene nanoplatelets nanocomposites

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