Epoxy filled with bare and oxidized multi-layered graphene nanoplatelets: a comparative study of filler loading impact on thermal properties

Filler loading effects in both the thermal stability (TS) and thermal conductivity (TC) of ED-20 epoxy filled with bare (MLG) or oxidized multi-layered graphene nanoplatelets (MLGO) have been experimentally and theoretically studied. The particles were of about 5 × 5 μm in lateral size, about 50 nm...

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Bibliographic Details
Published in:Journal of materials science 2019-06, Vol.54 (12), p.9247-9266
Main Authors: Gorelov, Borys, Gorb, Alla, Nadtochiy, Andriy, Starokadomsky, Dmitro, Kuryliuk, Vasyl, Sigareva, Nadia, Shulga, Sergey, Ogenko, Volodymyr, Korotchenkov, Oleg, Polovina, Oleksiy
Format: Article
Language:English
Subjects:
Characterization and Evaluation of Materials
Chemistry and Materials Science
Classical Mechanics
Comparative analysis
Comparative studies
Crystallography and Scattering Methods
Electric properties
Epoxy resins
Fillers
Graphene
Graphite
Mass spectrometry
Materials Science
Molecular dynamics
Multilayers
Nanocomposites
Polymer Sciences
Polymers
Solid Mechanics
Spectrometry
Thermal conductivity
Thermal properties
Thermal stability
Thermodynamic properties
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Summary:Filler loading effects in both the thermal stability (TS) and thermal conductivity (TC) of ED-20 epoxy filled with bare (MLG) or oxidized multi-layered graphene nanoplatelets (MLGO) have been experimentally and theoretically studied. The particles were of about 5 × 5 μm in lateral size, about 50 nm in thickness, and of the specific surface area ~ 790 m 2 /g. The filler’s mass loading varied from 0.5 to 5.0%. TS studies have been performed by the temperature-programmed desorption technique with mass spectrometric detection of volatile moieties. The TC has been measured using the ASTM C1114 standard test method and modeled by equilibrium molecular dynamics simulations via LAMMPS package. TS has proved to be enhanced in MLG nanocomposites and deteriorated when using MLGO fillers, compared to those of the neat epoxy. For both the MLG and MLGO nanocomposites, volatile-moiety outputs showed non-monotonous loading dependences, whereas TC exhibited monotonic increase with increasing loading. It is shown that the TS and TC can be improved simultaneously in these nanocomposites. The likely involvement of the interfacial interaction mechanisms behind these effects is addressed.
ISSN:0022-2461
1573-4803
DOI:10.1007/s10853-019-03523-7