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High thermal conductivity through simultaneously aligned polyethylene lamellae and graphene nanoplatelets

Abstract

The effect of simultaneous alignment of polyethylene (PE) lamellae and graphene nanoplatelets (GnP) on thermal conductivity (k) of PE-GnP composites is investigated. Measurements reveal a large increase of 1100% in k of the aligned PE-GnP composite using 10 weight% GnPs relative to unoriented pure PE. Rate of increase of k with applied strain for the pure PE-GnP composite with 10 wt% GnP is found to be almost a factor of two higher than the pure PE sample, pointing to the beneficial effect of GnP alignment on k enhancement. Aligned GnPs are further found to be 3 times as effective in enhancing k as in the randomly oriented configuration. Enhancement in k is correlated with alignment of PE lamellae and GnPs through wide-angle X-ray scattering and polarized Raman spectroscopy. At the maximum applied strain of 400% and using 10 wt% GnPs, a composite k of 5.9 W/mK is achieved. These results demonstrate the large potential of simultaneous alignment effects in achieving high k polymer composites.

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Publication details

The article was received on 29 Jun 2017, accepted on 08 Aug 2017 and first published on 09 Aug 2017


Article type: Communication
DOI: 10.1039/C7NR04686C
Citation: Nanoscale, 2017, Accepted Manuscript
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    High thermal conductivity through simultaneously aligned polyethylene lamellae and graphene nanoplatelets

    M. Saeidijavash, J. Garg, B. P. Grady, B. Smith, Z. Li, R. J. Young, F. Tarranum and N. Bel Bekri, Nanoscale, 2017, Accepted Manuscript , DOI: 10.1039/C7NR04686C

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