Properties of Graphene-Related Materials Controlling the Thermal Conductivity of Their Polymer Nanocomposites

Colonna, Samuele; Battegazzore, Daniele; Eleuteri, Matteo; Arrigo, Rossella; Fina, Alberto

doi:10.3390/nano10112167

Cited by 23 publications

(25 citation statements)

References 115 publications

(145 reference statements)

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“…On the other hand, the production of high-quality monolayer graphene sheets is still limited at a relatively small scale. Graphitic nanofillers, 129 including G (low amounts), graphite nanoplatelets (GNP), GO, reduced GO (RGO), few-layer graphene (FLG) and multi-layer graphene (MLG) can be produced in sufficient amounts for polymer nanocomposite production by oxidation and salification of graphite followed by chemical or thermal reduction, electrochemical exfoliation of graphite, and liquid phase exfoliation of graphite. Moreover, G exfoliation remains a major challenge due to the strong - stacking of the  orbitals of carbon atoms on adjacent sheets.…”

Section: D Nanoparticlesmentioning

confidence: 99%

“…The low melt viscosity of MCOs may also favor graphene exfoliation. In-situ ED-ROP was indeed exploited for the preparation of pCBT-based nanocomposites containing graphitic nanofillers, 26,129,[146][147][148] which are blended with CBT both in a solvent (THF, acetone) or in the molten state. ED-ROP was carried in the presence of tin-based initiators at temperatures higher than 200 °C with or without mechanical stirring, in a batch mixer or a co-rotating twin-screw mini-extruder.…”

Section: Author(s)mentioning

confidence: 99%

“…The successive chemical or thermal reduction of GO leads respectively to RGO or TRGO platelets retaining some of the oxygenated functional groups originally present on the GO platelets. 149 Nevertheless, reduced GOs have been used in several papers 129,146 focused on ED-ROP of CBT but no marked improvements were recorded, especially in terms of rate and degree of polymerization.…”

Section: Author(s)mentioning

confidence: 99%

See 2 more Smart Citations

ED-ROP of macrocyclic oligomers: A synthetic tool for multicomponent polymer materials

Stagnaro¹,

Brunengo²,

Conzatti³

2021

Arkivoc

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Entropically-driven ring-opening polymerization (ED-ROP) of strainless macrocyclic oligomers (MCOs) of condensation polymers has received a great deal of attention in the past three decades. Typical features of ED-ROP, such as no need for solvents, no emission of volatiles, practically no heat evolution, no particular need for mixing, automatic stoichiometric balance, make this process a useful synthetic tool in a variety of applications involving polymers of industrial interest. Selected examples exploiting ED-ROP of MCOs to (i) achieve multicomponent polymer materials (copolymers, blends, composites and nanocomposites), (ii) aid melt processing, (iii) enhance phase compatibility, (iv) modify material properties or (v) allow chemical recycling are reviewed.

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Section: D Nanoparticlesmentioning

confidence: 99%

Section: Author(s)mentioning

confidence: 99%

Section: Author(s)mentioning

confidence: 99%

See 1 more Smart Citation

ED-ROP of macrocyclic oligomers: A synthetic tool for multicomponent polymer materials

Stagnaro¹,

Brunengo²,

Conzatti³

2021

Arkivoc

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“…The most popular approach to exploit the exciting properties of 2D materials is to disperse them inside a continuous matrix made of polymer, creating a nanocomposite material. Although the thermal conductivity of graphene polymer nanocomposites has been extensively studied in the literature [ 11 , 12 ], borophene polymer nanocomposites are basically unexplored, either theoretically or experimentally. In order to improve the knowledge with respect to the application of borophene in thermal management systems, in this work we conduct a multi-scale theoretical study to compare graphene and borophene for employment as reinforcement nanomaterials for improvement of the thermal conductivity of polymeric materials.…”

Section: Introductionmentioning

confidence: 99%

A Multiscale Investigation on the Thermal Transport in Polydimethylsiloxane Nanocomposites: Graphene vs. Borophene

et al. 2021

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Graphene and borophene are highly attractive two-dimensional materials with outstanding physical properties. In this study we employed combined atomistic continuum multi-scale modeling to explore the effective thermal conductivity of polymer nanocomposites made of polydimethylsiloxane (PDMS) polymer as the matrix and graphene and borophene as nanofillers. PDMS is a versatile polymer due to its chemical inertia, flexibility and a wide range of properties that can be tuned during synthesis. We first conducted classical Molecular Dynamics (MD) simulations to calculate the thermal conductance at the interfaces between graphene and PDMS and between borophene and PDMS. Acquired results confirm that the interfacial thermal conductance between nanosheets and polymer increases from the single-layer to multilayered nanosheets and finally converges, in the case of graphene, to about 30 MWm−2 K−1 and, for borophene, up to 33 MWm−2 K−1. The data provided by the atomistic simulations were then used in the Finite Element Method (FEM) simulations to evaluate the effective thermal conductivity of polymer nanocomposites at the continuum level. We explored the effects of nanofiller type, volume content, geometry aspect ratio and thickness on the nanocomposite effective thermal conductivity. As a very interesting finding, we found that borophene nanosheets, despite having almost two orders of magnitude lower thermal conductivity than graphene, can yield very close enhancement in the effective thermal conductivity in comparison with graphene, particularly for low volume content and small aspect ratios and thicknesses. We conclude that, for the polymer-based nanocomposites, significant improvement in the thermal conductivity can be reached by improving the bonding between the fillers and polymer, or in other words, by enhancing the thermal conductance at the interface. By taking into account the high electrical conductivity of borophene, our results suggest borophene nanosheets as promising nanofillers to simultaneously enhance the polymers’ thermal and electrical conductivity.

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“…Among the various approaches to exploit the exciting properties of 2D materials is to disperse them inside a continuous matrix made of polymer, creating a composite material. Although the thermal conductivity of graphene polymer nanocomposites has been extensively studied in the literature [5], borophene polymer nanocomposites are basically unexplored, either theoretically or experimentally. In order to improve the knowledge with respect to the application of borophene in thermal management systems, in this work we conduct a multiscale theoretical study to compare the graphene and borophene for the employment as the reinforcement nanomaterials for the improvement of the thermal conductivity of polymeric materials.…”

Section: Introductionmentioning

confidence: 99%

A Multiscale Investigation on the Thermal Transport in Polydimethylsiloxane Nanocomposites: Graphene vs Borophene

Pierro¹,

Mortazavi²,

Noori³

et al. 2021

Preprint

Self Cite

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Graphene and borophene are highly attractive two-dimensional materials with outstanding physical properties. In this study we employed a combined atomistic continuum multiscale modeling to explore the effective thermal conductivity of polymers nanocomposites made of PDMS polymer as the matrix and graphene and borophene as nanofillers. We first conduct classical molecular dynamics simulations to investigate the interfacial thermal conductance between graphene/PDMS and borophene/PDMS interfaces. Acquired results confirm that the interfacial thermal conductance between nanosheets and polymer increases from the single-layer to multilayered nanosheets and finally converges. The data provided by the atomistic simulations were then used in the finite element method simulations to evaluate the effective thermal conductivity of polymer nanocomposites at continuum level. We explore the effects of nanofillers type, their volume content, geometry aspect ratio and thickness on the nanocomposites effective thermal conductivity. As a very interesting finding, we show that borophene nanosheets, despite almost two orders of magnitude lower thermal conductivity than graphene, can yield very close enhancement in the effective thermal conductivity in comparison with graphene, particularly for low volume content and small aspect ratios and thicknesses. We conclude that for the polymer-based nanocomposites, significant improvement in the thermal conductivity can be reached by improving the bonding between the fillers and polymer or in another word enhancing the thermal conductance at the interface. By taking into account the high electrical conductivity of borophene, our results suggest borophene nanosheets as promising nanofillers to simultaneously enhance the polymers thermal and electrical conductivity.

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Properties of Graphene-Related Materials Controlling the Thermal Conductivity of Their Polymer Nanocomposites

Cited by 23 publications

References 115 publications

ED-ROP of macrocyclic oligomers: A synthetic tool for multicomponent polymer materials

ED-ROP of macrocyclic oligomers: A synthetic tool for multicomponent polymer materials

A Multiscale Investigation on the Thermal Transport in Polydimethylsiloxane Nanocomposites: Graphene vs. Borophene

A Multiscale Investigation on the Thermal Transport in Polydimethylsiloxane Nanocomposites: Graphene vs Borophene

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