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Influence of moisture absorption on electrical properties and charge dynamics of polyethylene silica-based nanocomposites

Influence of moisture absorption on electrical properties and charge dynamics of polyethylene silica-based nanocomposites
Influence of moisture absorption on electrical properties and charge dynamics of polyethylene silica-based nanocomposites
The use of nanocomposites as dielectric materials is expected to lead to improved electrical performance. However, recent research has shown that moisture absorption can cause a deterioration in the electrical performance of nanocomposites. Although it is generally accepted that hydroxyl groups attached to nanoparticle surfaces are the main cause of moisture absorption, the impact of this absorption on the electrical properties of nanocomposites is still not fully understand. In this paper, a series of measurements, including thermogravimetric analysis, DC breakdown, surface potential decay and space charge, are conducted with the aim of determining the impact of moisture absorption on the electrical properties of polyethylene/silica nanocomposites. The results show that the loading ratio of nanosilica and the humidity of the conditioning environment determine the amount of absorbed moisture. According to the Zhuravlev model, the main contribution to the deterioration in electrical properties of nanocomposites comes from the large amount of moisture absorbed in multilayer form. It is found that the loading ratio of nanosilica is the most significant factor in reducing DC breakdown strength.
0022-3727
Wang, Yan
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Qiang, Dayuan
2a64f637-fc33-4722-ab29-4e8fd60895a1
Alhabill, Fuad
253d8162-b329-46cc-ace6-5e39a8caca33
Xu, Zhiqiang
797f8b0e-a035-4cf9-ac3f-99098a3fdb50
Chen, Guanghui
3de45a9c-6c9a-4bcb-90c3-d7e26be21819
Vaughan, Alun
6d813b66-17f9-4864-9763-25a6d659d8a3
Wang, Yan
f64021d0-1658-417b-93a7-b59055bd76f9
Qiang, Dayuan
2a64f637-fc33-4722-ab29-4e8fd60895a1
Alhabill, Fuad
253d8162-b329-46cc-ace6-5e39a8caca33
Xu, Zhiqiang
797f8b0e-a035-4cf9-ac3f-99098a3fdb50
Chen, Guanghui
3de45a9c-6c9a-4bcb-90c3-d7e26be21819
Vaughan, Alun
6d813b66-17f9-4864-9763-25a6d659d8a3

Wang, Yan, Qiang, Dayuan, Alhabill, Fuad, Xu, Zhiqiang, Chen, Guanghui and Vaughan, Alun (2018) Influence of moisture absorption on electrical properties and charge dynamics of polyethylene silica-based nanocomposites. Journal of Physics D: Applied Physics. (doi:10.1088/1361-6463/aadb7b).

Record type: Article

Abstract

The use of nanocomposites as dielectric materials is expected to lead to improved electrical performance. However, recent research has shown that moisture absorption can cause a deterioration in the electrical performance of nanocomposites. Although it is generally accepted that hydroxyl groups attached to nanoparticle surfaces are the main cause of moisture absorption, the impact of this absorption on the electrical properties of nanocomposites is still not fully understand. In this paper, a series of measurements, including thermogravimetric analysis, DC breakdown, surface potential decay and space charge, are conducted with the aim of determining the impact of moisture absorption on the electrical properties of polyethylene/silica nanocomposites. The results show that the loading ratio of nanosilica and the humidity of the conditioning environment determine the amount of absorbed moisture. According to the Zhuravlev model, the main contribution to the deterioration in electrical properties of nanocomposites comes from the large amount of moisture absorbed in multilayer form. It is found that the loading ratio of nanosilica is the most significant factor in reducing DC breakdown strength.

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Wang et al - Accepted Manuscript
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Accepted/In Press date: 20 August 2018
e-pub ahead of print date: 20 August 2018

Identifiers

Local EPrints ID: 423234
URI: http://eprints.soton.ac.uk/id/eprint/423234
ISSN: 0022-3727
PURE UUID: cfd0b7ca-197c-401e-898a-4fcbf8f106f6
ORCID for Zhiqiang Xu: ORCID iD orcid.org/0000-0002-6640-7335
ORCID for Alun Vaughan: ORCID iD orcid.org/0000-0002-0535-513X

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Date deposited: 19 Sep 2018 16:30
Last modified: 18 Feb 2021 17:14

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