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Enhanced dielectric properties of polyethylene/hexagonal boron nitride nanocomposites

Enhanced dielectric properties of polyethylene/hexagonal boron nitride nanocomposites
Enhanced dielectric properties of polyethylene/hexagonal boron nitride nanocomposites
A range of nanocomposites based on a polyethylene polymer and hexagonal boron nitride (hBN) filler has been explored in this study. The dielectric properties of the nanocomposites, which consisted of 2 wt %, 5 wt %, 10 wt %, 20 wt %, and 30 wt % of hBN, have been compared to the dielectric properties of the unfilled polyethylene blend. Scanning electron microscopy (SEM) revealed that the hBN was uniformly distributed in the polyethylene matrix, although large amounts of agglomerates were present in the nanocomposites containing more than 10 wt % of hBN. The incorporation of hBN into polyethylene resulted in a highly disordered morphology in comparison to the unfilled polyethylene, in which this effect was more pronounced with increasing hBN content. This is consistent with the increasing crystallisation temperature as the hBN content increases, as shown by differential scanning calorimetry (DSC), where the hBN acted as a highly effective nucleating due to the strong interactions between the polyethylene and the hBN. This strong interaction is again reflected in the thermal decomposition temperature which similarly increases with increasing hBN content. The study demonstrates the remarkable electrical properties of the prepared nanocomposites, where the breakdown strength monotonically increased as a function of hBN content, even with a very high 30 wt % of hBN. The improvement in electrical properties, even at high hBN concentrations, is contradictory to the reported results in the literature and are mainly attributed to the hydrophobic surface of the hBN particles.
0022-2461
Ayoob, Raed
9520a234-f49a-45b9-ba23-c4d0e500da14
Alhabill, Fuad, N. F.
253d8162-b329-46cc-ace6-5e39a8caca33
Andritsch, Thomas
8681e640-e584-424e-a1f1-0d8b713de01c
Vaughan, Alun
6d813b66-17f9-4864-9763-25a6d659d8a3
Ayoob, Raed
9520a234-f49a-45b9-ba23-c4d0e500da14
Alhabill, Fuad, N. F.
253d8162-b329-46cc-ace6-5e39a8caca33
Andritsch, Thomas
8681e640-e584-424e-a1f1-0d8b713de01c
Vaughan, Alun
6d813b66-17f9-4864-9763-25a6d659d8a3

Ayoob, Raed, Alhabill, Fuad, N. F., Andritsch, Thomas and Vaughan, Alun (2017) Enhanced dielectric properties of polyethylene/hexagonal boron nitride nanocomposites. Journal of Materials Science. (doi:10.1007/s10853-017-1786-y).

Record type: Article

Abstract

A range of nanocomposites based on a polyethylene polymer and hexagonal boron nitride (hBN) filler has been explored in this study. The dielectric properties of the nanocomposites, which consisted of 2 wt %, 5 wt %, 10 wt %, 20 wt %, and 30 wt % of hBN, have been compared to the dielectric properties of the unfilled polyethylene blend. Scanning electron microscopy (SEM) revealed that the hBN was uniformly distributed in the polyethylene matrix, although large amounts of agglomerates were present in the nanocomposites containing more than 10 wt % of hBN. The incorporation of hBN into polyethylene resulted in a highly disordered morphology in comparison to the unfilled polyethylene, in which this effect was more pronounced with increasing hBN content. This is consistent with the increasing crystallisation temperature as the hBN content increases, as shown by differential scanning calorimetry (DSC), where the hBN acted as a highly effective nucleating due to the strong interactions between the polyethylene and the hBN. This strong interaction is again reflected in the thermal decomposition temperature which similarly increases with increasing hBN content. The study demonstrates the remarkable electrical properties of the prepared nanocomposites, where the breakdown strength monotonically increased as a function of hBN content, even with a very high 30 wt % of hBN. The improvement in electrical properties, even at high hBN concentrations, is contradictory to the reported results in the literature and are mainly attributed to the hydrophobic surface of the hBN particles.

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JMSC-D-17-04273 Revised Manuscript_2 - Accepted Manuscript
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s10853-017-1786-y - Version of Record
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More information

Accepted/In Press date: 31 October 2017
e-pub ahead of print date: 14 November 2017

Identifiers

Local EPrints ID: 415233
URI: https://eprints.soton.ac.uk/id/eprint/415233
ISSN: 0022-2461
PURE UUID: 4fc8c541-43f6-473e-af64-080a7a26d419
ORCID for Thomas Andritsch: ORCID iD orcid.org/0000-0002-3462-022X
ORCID for Alun Vaughan: ORCID iD orcid.org/0000-0002-0535-513X

Catalogue record

Date deposited: 03 Nov 2017 17:30
Last modified: 09 May 2019 00:36

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