Tailoring Thermal Transport Properties of Graphene Paper by Structural Engineering

Ren, Li; Wang, Mengjie; Lu, Shaorong; Pan, Leilei; Xiong, Zuzhou; Zhang, Zuocai; Peng, Qingyuan; Li, Yuqi; Yu, Jinhong

doi:10.1038/s41598-018-38106-0

Cited by 11 publications

(12 citation statements)

References 59 publications

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“…The component areas were constrained to correspond to the chemical structure of the polymer repeat units. In the HR spectra of the pristine PL layer, the component peak maxima located at 284.9 eV (aromatic C sp 2 ), 285.3 eV (aliphatic C sp 3 ), 286 eV (C-N sp 3 ), and 288.5 eV (O=C-N) are in good agreement with the positions reported in the literature for the corresponding groups [68][69][70]. The peak at approximately 287 eV can be assigned to the shake-up excitations associated with the aromatic C sp 2 .…”

Section: Copolymersupporting

confidence: 88%

Hybrid Layers of Donor-Acceptor Copolymers with Homogenous Silver Nanoparticle Coverage for Photonic Applications

et al. 2021

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Hybrid layers of donor-acceptor (D-A) copolymers containing N,N′-dialkylperylene-3,4,9,10-tetracarboxydiimide electron-acceptor units covered with silver nanoparticles (Ag-NPs) were prepared by electrochemical doping of pristine layers during reduction processes. In situ optical absorption spectra of the layers were recorded during the formation of Ag-NP coverage. The hybrid layers were characterized by absorption spectroscopy, scanning electron microscopy (SEM), X-ray photoelectron spectroscopy (XPS), and energy dispersive X-ray spectroscopy (EDX). In the absorption spectra of the hybrid layers, a surface plasmon band characteristic of Ag-NPs appeared. Significant improvements in light absorption due to the plasmonic effects of Ag NPs were observed. Stable Ag-NPs with an average diameter of 41–63 nm were formed on the surface, as proven by SEM and XPS. The Ag-NP coverage and size depended on the hybrid layer preparation conditions and on the copolymer composition. The metallic character of the Ag-NPs was proven by XPS. The location in the surface layer was further confirmed by EDX analysis. To the best of our knowledge, this is the first report on such hybrid layers having the potential for a variety of photonic and electronic applications.

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Section: Copolymersupporting

confidence: 88%

Hybrid Layers of Donor-Acceptor Copolymers with Homogenous Silver Nanoparticle Coverage for Photonic Applications

et al. 2021

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“…Exploiting a vacuum-assisted self-assembly technique, Ren et al 172 engineered thermal transport properties via noncovalent functionalized graphene with NCC. Favorable hydrogen bond association between NCC and functionalized graphene papers (NPGs) endowed excellent thermal properties that is, as high as in-plane TC to 21.05 W m −1 K −1 , good TC over several heating/cooling cycles as well as superior efficacy as an effective heat spreader, Figure 14a−d. A comparison reveals its superiority over a number of composite materials aiming to thermal applications.…”

Section: Emerging Applications Of Nanocellulose-graphene Based Compos...mentioning

confidence: 99%

Nanocellulose Coupled 2D Graphene Nanostructures: Emerging Paradigm for Sustainable Functional Applications

Ahmed

Adak²,

Faruk

et al. 2021

Ind. Eng. Chem. Res.

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The worldwide concern of ensuring a sustainable future for the coming generations has led to the idea of developing renewable functional materials. Cellulose, the most abundant natural biopolymer on earth is a remarkably low-cost material with excellent inherent properties. Nanocellulose is derived from different cellulosic sources in various forms which have excellent properties such as high surface area, crystallinity, mechanical strength, and tunable chemistry. Owing to these exciting features, cellulosic nanomaterials are integrated with other functional materials such as 2D graphitic materials to fabricate advanced hybrid materials which can be utilized as building blocks, robust carriers, scaffold components, and reinforcing materials. The exceptional synergies between cellulosic nanomaterials and graphene have resulted in significant innovations in this emerging field. In this critical review, an attempt has been made to critically discuss several key aspects related to processing such as solvent selection, homogeneous dispersion, and regeneration of nanocellulose-graphene based composites (NGCs). Special attention has been paid to the wide range of applications of NGCs in flexible electronic sensing, energy storage, biomedical, barrier and packaging, ultraviolet and electromagnetic shielding, thermal management, adsorption, and separation technologies. The major challenges in the respective fields have been highlighted, and the future prospects of NGCs toward developing advanced sustainable devices have also been outlined.

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“…As graphene has a very high in-plane 3000 W/(m·K) conductivity, it is a potential filler in polymeric and epoxy hosts for increased thermal and electrical conductivity; the out-of-plane conductivity of graphene-stack is only 5 W/(m·K) [ 4 ]. Composites that use graphene as the filler, it was previously shown that the thermal conductivity is increasing linearly with its weight percentage (up to 30 wt% before saturation), and in the case of NC-paper with 10 wt% of graphene, reached high 25 W/(m·K) values [ 5 ].…”

Section: Introductionmentioning

confidence: 99%

Direct Measurement of Temperature Diffusivity of Nanocellulose-Doped Biodegradable Composite Films

et al. 2020

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The thermal properties of novel nanomaterials play a significant role in determining the performance of the material in technological applications. Herein, direct measurement of the temperature diffusivity of nanocellulose-doped starch–polyurethane nanocomposite films was carried out by the micro-contact method. Polymer films containing up to 2 wt%. of nanocellulose were synthesised by a simple chemical process and are biodegradable. Films of a high optical transmittance T≈80% (for a 200 μm thick film), which were up to 44% crystalline, were characterised. Two different modalities of temperature diffusivity based on (1) a resistance change and (2) micro-thermocouple detected voltage modulation caused by the heat wave, were used for the polymer films with cross sections of ∼100 μm thickness. Twice different in-plane α‖ and out-of-plane α⊥ temperature diffusivities were directly determined with high fidelity: α‖=2.12×10−7 m2/s and α⊥=1.13×10−7 m2/s. This work provides an example of a direct contact measurement of thermal properties of nanocellulose composite biodegradable polymer films. The thermal diffusivity, which is usually high in strongly interconnected networks and crystals, was investigated for the first time in this polymer nanocomposite.

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Tailoring Thermal Transport Properties of Graphene Paper by Structural Engineering

Cited by 11 publications

References 59 publications

Hybrid Layers of Donor-Acceptor Copolymers with Homogenous Silver Nanoparticle Coverage for Photonic Applications

Hybrid Layers of Donor-Acceptor Copolymers with Homogenous Silver Nanoparticle Coverage for Photonic Applications

Nanocellulose Coupled 2D Graphene Nanostructures: Emerging Paradigm for Sustainable Functional Applications

Direct Measurement of Temperature Diffusivity of Nanocellulose-Doped Biodegradable Composite Films

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