Thermal conductivity of graphene-based polymer nanocomposites

Huang, Xingyi; Chen, Zhi; Lin, Ying; Bao, Hua; Wu, Guangning; Jiang, Pingkai; Mai, Yiu‐Wing

doi:10.1016/j.mser.2020.100577

Cited by 268 publications

(110 citation statements)

References 329 publications

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“…Therefore, attempts have been made to use various types of nanographene fillers. 5,6 The observed values for the effective thermal conductivity of actual paraffin/graphene composites are rather scattered in the range of the order of 10 À1 -10 1 W (m K) À1 for filler concentrations less than 20 wt%, [7][8][9][10] and these values are much lower than expected when compared with the high thermal conductivity of graphene. To understand this result, many molecular-scale factors must be considered in addition to thermodynamic conditions including temperature, pressure, and filler concentration.…”

Section: Introductionmentioning

confidence: 91%

“…The reference equilibrium state signifies the equilibrium state which is spontaneously reached when rT applied in the non-equilibrium steady state is turned off. After a sufficiently large time t, L AB (t) becomes constant, and this value is equal to L AB appeared in eqn (5). Using eqn ( 6) and ( 7), one can derive the thermal conductivity tensor l as a 3 Â 3 matrix from EMD simulation.…”

Section: Thermal Conductivity Tensor For a Binary Systemmentioning

confidence: 99%

“…MD simulation has been utilized to investigate the effect of molecular-scale factors on the thermal conductivity enhancement in paraffin/graphene composites, 10,12,25,[28][29][30] as well as other polymer/graphene composites. 5,18 Most of these MD studies dealt with a system where a single filler of SLG or MLG was embedded in a matrix or multiple SLGs were uniformly dispersed, 25 and therefore the aggregation of fillers except for simple stacking has not been fully discussed. In addition, the effective thermal conductivity of composites has been calculated mostly using non-equilibrium MD (NEMD) simulation.…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Effect of the in-plane aspect ratio of a graphene filler on anisotropic heat conduction in paraffin/graphene composites

Matsubara

Ohara

2021

Phys. Chem. Chem. Phys.

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Section: Introductionmentioning

confidence: 91%

Section: Thermal Conductivity Tensor For a Binary Systemmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Effect of the in-plane aspect ratio of a graphene filler on anisotropic heat conduction in paraffin/graphene composites

Matsubara

Ohara

2021

Phys. Chem. Chem. Phys.

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“…Thermal conduction in amorphous polymers occurs by phonons, but as it is not an ordered structure, vibrations are disordered, and thermal conduction is not highly effective. Adding fillers improves phonon transmission, so interfacial covalent bonds play an important role in the propagation of phonons from matrix to filler [ 73 ], but the presence of a large number of bonds also has a negative effect, since the phonons are dissipated by these bonds, and the thermal conductivity decreases [ 73 , 74 ].…”

Section: Filler Effectmentioning

confidence: 99%

Self-Healing Polymer Nanocomposite Materials by Joule Effect

et al. 2021

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Nowadays, the self-healing approach in materials science mainly relies on functionalized polymers used as matrices in nanocomposites. Through different physicochemical pathways and stimuli, these materials can undergo self-repairing mechanisms that represent a great advantage to prolonging materials service-life, thus avoiding early disposal. Particularly, the use of the Joule effect as an external stimulus for self-healing in conductive nanocomposites is under-reported in the literature. However, it is of particular importance because it incorporates nanofillers with tunable features thus producing multifunctional materials. The aim of this review is the comprehensive analysis of conductive polymer nanocomposites presenting reversible dynamic bonds and their energetical activation to perform self-healing through the Joule effect.

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“…Graphene is a one-atom-thick 2D honeycomb structure of carbon atoms with extra high in-plane elastic stiffness and electrical and thermal conductivities. Graphene's density equals 2.1 g/cm 3 , and it has been investigated widely by researchers since 2004. Graphene-based nanocomposites can be used in different industries.…”

Section: Introductionmentioning

confidence: 99%

Mechanical Properties of Green Synthesized Graphene Nano-Composite Samples

et al. 2021

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Graphene quantum dots are zero-dimensional nanoparticles that are used widely in advanced composite materials such as filtration membranes, adsorbent materials, optical devices, biomedical applications (especially biosensors), flame retardancy, and automotive, aerospace, agricultural and environmental applications. In this article, the mechanical properties (flexural strength, flexural strain and elastic modulus) of polymer-based nanocomposites will be investigated. The main novelty of the current work is the green synthesis of graphene quantum dots which were extracted from lemon juice. XRD and FTIR tests have been conducted to determine the composition of the prepared powder. The polyester resin and graphene quantum dots were mixed with different weight percentages (0.25%, 0.5% and 1% wt. graphene) and processed to fabricate nanocomposite samples. The mechanical properties of the prepared samples were measured according to the ASTM D790-17 standard testing method. The experimental results show that the strength increased from 80 MPa to about 112 MPa (40% increase in strength) by adding 0.25% wt. graphene quantum dots. The flexural modulus decreased from 2.70 GPa to 2.06 GPa by adding 1% wt. graphene content (23% decrease). The flexural strain increased considerably (up to 14.2%) by adding 1% wt. graphene quantum dots. Consequently, the ductility of the nanocomposites increased by adding green synthesized graphene quantum dots. The fracture behavior changed from brittle fracture mode to ductile fracture mode by adding the graphene quantum dots. Additionally, a flame retardancy test has been carried out by implementing the UL-94 test. The fabricated nanocomposites showed fire retardancy due to char barrier formation on the surface of the nanocomposites.

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Thermal conductivity of graphene-based polymer nanocomposites

Cited by 268 publications

References 329 publications

Effect of the in-plane aspect ratio of a graphene filler on anisotropic heat conduction in paraffin/graphene composites

Effect of the in-plane aspect ratio of a graphene filler on anisotropic heat conduction in paraffin/graphene composites

Self-Healing Polymer Nanocomposite Materials by Joule Effect

Mechanical Properties of Green Synthesized Graphene Nano-Composite Samples

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