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Journal of Materials Science

Erschienen in:

01.08.2014

Enhanced thermal conductivity in polymer composites with aligned graphene nanosheets

verfasst von: Haiyan Yan, Yanxia Tang, Wei Long, Yongfei Li

Erschienen in: Journal of Materials Science | Ausgabe 15/2014

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Abstract

We developed highly aligned graphene nanosheets (GNSs) in epoxy composites with incorporating magnetic GNS–Fe₃O₄ hybrids under a magnetic field with the aim to take full advantage of the high inplane thermal conductivity of graphene. GNS–Fe₃O₄ hybrids were fabricated by a simple coprecipitation method, and their morphology, chemistry, and structure were characterized. GNS–Fe₃O₄ hybrids were found to be homogenously dispersed and well aligned through the direction of the magnetic field in the epoxy matrix, as confirmed by SEM observation and Raman spectra analysis. The resulting epoxy/GNS–Fe₃O₄ composites possessed high thermal conductivity in a parallel magnetic-alignment direction at low GNS–Fe₃O₄ loadings, which greatly outperformed the composites with randomly dispersed bare GNSs. The obtained results indicated that the magnetic alignment of magnetic-functionalized GNSs is an effective way for greatly improving the thermal conductivity of the graphene-based composites.

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Titel: Enhanced thermal conductivity in polymer composites with aligned graphene nanosheets
verfasst von: Haiyan Yan
Yanxia Tang
Wei Long
Yongfei Li
Publikationsdatum: 01.08.2014
Verlag: Springer US
Erschienen in: Journal of Materials Science / Ausgabe 15/2014
Print ISSN: 0022-2461
Elektronische ISSN: 1573-4803
DOI: https://doi.org/10.1007/s10853-014-8198-z

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