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On the effect of functionalizer chain length and water content in polyethylene/silica nanocomposites: Part II – Charge Transport

On the effect of functionalizer chain length and water content in polyethylene/silica nanocomposites: Part II – Charge Transport
On the effect of functionalizer chain length and water content in polyethylene/silica nanocomposites: Part II – Charge Transport
The effects of functionalizer chain length and water content were explored in a series of polyethylene/silica nanocomposites. Silane molecules with differing chain lengths (propyl, octyl and octadecyl) were used to vary the nanoparticle surface chemistry, while vacuum drying and water immersion were used to extract water from or add water to samples previously equilibrated under ambient conditions. Electrical conductivity was found to be highly dependent upon water content, while space charge distributions measured using the pulsed electro-acoustic technique revealed that both the rate of charge injection at the electrode interfaces and the charge mobility within the sample bulk were strongly dependent on absorbed water. Changes to the charge transport dynamics due to the functionalizer chain length were, however, subtle. The removal of surface hydroxyl groups appears to be the primary mechanism by which functionalization influences electrical behavior; this reduces water uptake and, as a consequence, modifies charge transport behavior.
conductivity, nanocomposite, polyethylene, silica, space charge
2410-2420
Praeger, Matthew
84575f28-4530-4f89-9355-9c5b6acc6cac
Hosier, Ian
6a44329e-b742-44de-afa7-073f80a78e26
Holt, Alex
9aab8a69-bccc-4a51-81d5-56fe1002c569
Vaughan, Alun
6d813b66-17f9-4864-9763-25a6d659d8a3
Swingler, Steven
4f13fbb2-7d2e-480a-8687-acea6a4ed735
Praeger, Matthew
84575f28-4530-4f89-9355-9c5b6acc6cac
Hosier, Ian
6a44329e-b742-44de-afa7-073f80a78e26
Holt, Alex
9aab8a69-bccc-4a51-81d5-56fe1002c569
Vaughan, Alun
6d813b66-17f9-4864-9763-25a6d659d8a3
Swingler, Steven
4f13fbb2-7d2e-480a-8687-acea6a4ed735

Praeger, Matthew, Hosier, Ian, Holt, Alex, Vaughan, Alun and Swingler, Steven (2017) On the effect of functionalizer chain length and water content in polyethylene/silica nanocomposites: Part II – Charge Transport. IEEE Transactions on Dielectrics & Electrical Insulation, 24 (4), 2410-2420. (doi:10.1109/TDEI.2017.005789).

Record type: Article

Abstract

The effects of functionalizer chain length and water content were explored in a series of polyethylene/silica nanocomposites. Silane molecules with differing chain lengths (propyl, octyl and octadecyl) were used to vary the nanoparticle surface chemistry, while vacuum drying and water immersion were used to extract water from or add water to samples previously equilibrated under ambient conditions. Electrical conductivity was found to be highly dependent upon water content, while space charge distributions measured using the pulsed electro-acoustic technique revealed that both the rate of charge injection at the electrode interfaces and the charge mobility within the sample bulk were strongly dependent on absorbed water. Changes to the charge transport dynamics due to the functionalizer chain length were, however, subtle. The removal of surface hydroxyl groups appears to be the primary mechanism by which functionalization influences electrical behavior; this reduces water uptake and, as a consequence, modifies charge transport behavior.

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20151221_TDEI_MFP.pdf - Accepted Manuscript
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More information

Submitted date: 22 December 2015
Accepted/In Press date: 9 May 2017
e-pub ahead of print date: 13 September 2017
Published date: 1 October 2017
Keywords: conductivity, nanocomposite, polyethylene, silica, space charge
Organisations: EEE

Identifiers

Local EPrints ID: 382013
URI: http://eprints.soton.ac.uk/id/eprint/382013
PURE UUID: bba710dd-84f8-4836-a3ab-f3ed30c9bb3b
ORCID for Ian Hosier: ORCID iD orcid.org/0000-0003-4365-9385
ORCID for Alun Vaughan: ORCID iD orcid.org/0000-0002-0535-513X

Catalogue record

Date deposited: 28 Sep 2015 16:11
Last modified: 17 Dec 2019 01:52

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Contributors

Author: Matthew Praeger
Author: Ian Hosier ORCID iD
Author: Alex Holt
Author: Alun Vaughan ORCID iD
Author: Steven Swingler

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