The University of Southampton
University of Southampton Institutional Repository

Dielectric response of polyethylene nanocomposites: the effect of surface treatment and water absorption

Dielectric response of polyethylene nanocomposites: the effect of surface treatment and water absorption
Dielectric response of polyethylene nanocomposites: the effect of surface treatment and water absorption
The potential of polymer nanocomposites as dielectric materials is an active area of research, due to the promising electrical properties that may result from nanostructuration. Recently, the effect of water absorption in nanocomposites has been considered and it is found that nanocomposites can absorb significantly more water than the equivalent unfilled polymer when exposed to humid environmental conditions. This is due, supposedly, to the presence of the nanoparticle-matrix interface, which could be a preferred location for the aggregation of water molecules. Nevertheless, from an application perspective, the presence of water is not welcomed as it might negatively affect the overall electrical properties. This paper reports on a dielectric spectroscopy investigation into polyethylene systems that contain different amounts of nanosilica with different surface chemistries. Results indicate that the permittivity and loss tangent of nanocomposites are higher than that of the unfilled polyethylene, especially in the low frequency range. Furthermore, water absorption tests show that nanocomposites do absorbed significantly more water than unfilled polyethylene, with the consequence that both the permittivity and loss tangent increase with increasing amounts of water. However, appropriate surface treatment of nanosilica was found to reduce the water absorption effect and to modify the dielectric response of nanocomposites compared with those containing untreated nanosilica. While water absorption may not be a technologically desirable characteristic, our results suggest that water molecules can act as effective dielectric probes of important factors
978-1-4673-1252-3
275-278
Lau, K.Y.
4f20d9d7-c517-4af9-bb57-b4f47538bf68
Vaughan, A.S.
6d813b66-17f9-4864-9763-25a6d659d8a3
Chen, G.
3de45a9c-6c9a-4bcb-90c3-d7e26be21819
Hosier, I.L.
6a44329e-b742-44de-afa7-073f80a78e26
Lau, K.Y.
4f20d9d7-c517-4af9-bb57-b4f47538bf68
Vaughan, A.S.
6d813b66-17f9-4864-9763-25a6d659d8a3
Chen, G.
3de45a9c-6c9a-4bcb-90c3-d7e26be21819
Hosier, I.L.
6a44329e-b742-44de-afa7-073f80a78e26

Lau, K.Y., Vaughan, A.S., Chen, G. and Hosier, I.L. (2012) Dielectric response of polyethylene nanocomposites: the effect of surface treatment and water absorption. 2012 IEEE Conference on Electrical Insulation and Dielectric Phenomena, Canada. 14 - 17 Oct 2012. pp. 275-278 .

Record type: Conference or Workshop Item (Paper)

Abstract

The potential of polymer nanocomposites as dielectric materials is an active area of research, due to the promising electrical properties that may result from nanostructuration. Recently, the effect of water absorption in nanocomposites has been considered and it is found that nanocomposites can absorb significantly more water than the equivalent unfilled polymer when exposed to humid environmental conditions. This is due, supposedly, to the presence of the nanoparticle-matrix interface, which could be a preferred location for the aggregation of water molecules. Nevertheless, from an application perspective, the presence of water is not welcomed as it might negatively affect the overall electrical properties. This paper reports on a dielectric spectroscopy investigation into polyethylene systems that contain different amounts of nanosilica with different surface chemistries. Results indicate that the permittivity and loss tangent of nanocomposites are higher than that of the unfilled polyethylene, especially in the low frequency range. Furthermore, water absorption tests show that nanocomposites do absorbed significantly more water than unfilled polyethylene, with the consequence that both the permittivity and loss tangent increase with increasing amounts of water. However, appropriate surface treatment of nanosilica was found to reduce the water absorption effect and to modify the dielectric response of nanocomposites compared with those containing untreated nanosilica. While water absorption may not be a technologically desirable characteristic, our results suggest that water molecules can act as effective dielectric probes of important factors

Text
064.pdf - Version of Record
Restricted to Registered users only
Download (158kB)
Request a copy

More information

Published date: 14 October 2012
Venue - Dates: 2012 IEEE Conference on Electrical Insulation and Dielectric Phenomena, Canada, 2012-10-14 - 2012-10-17
Organisations: EEE

Identifiers

Local EPrints ID: 344308
URI: http://eprints.soton.ac.uk/id/eprint/344308
ISBN: 978-1-4673-1252-3
PURE UUID: e2b6d925-a178-4da2-a83b-79d0635aed20
ORCID for A.S. Vaughan: ORCID iD orcid.org/0000-0002-0535-513X
ORCID for I.L. Hosier: ORCID iD orcid.org/0000-0003-4365-9385

Catalogue record

Date deposited: 17 Oct 2012 14:27
Last modified: 03 Dec 2019 01:54

Export record

Download statistics

Downloads from ePrints over the past year. Other digital versions may also be available to download e.g. from the publisher's website.

View more statistics

Atom RSS 1.0 RSS 2.0

Contact ePrints Soton: eprints@soton.ac.uk

ePrints Soton supports OAI 2.0 with a base URL of http://eprints.soton.ac.uk/cgi/oai2

This repository has been built using EPrints software, developed at the University of Southampton, but available to everyone to use.

We use cookies to ensure that we give you the best experience on our website. If you continue without changing your settings, we will assume that you are happy to receive cookies on the University of Southampton website.

×