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Dielectric breakdown strength and electrical conductivity of low density polyethylene octylnanosilica composite

Dielectric breakdown strength and electrical conductivity of low density polyethylene octylnanosilica composite
Dielectric breakdown strength and electrical conductivity of low density polyethylene octylnanosilica composite
One challenge in studying nanodielectric composites is to produce reliable, reproducible samples. A common strategy to suppress aggregation and make the particles more compatible with the polymer matrix is to modify the nanoparticle surface chemistry but, often, evaluation of the effectiveness of the chosen surface functionalization process can prove difficult. In this paper the emphasis is on feasible ways to monitor the production of silane coupled nanosilica low density polyethylene (LDPE) composites, using Fourier transform infrared spectroscopy (FTIR) and thermal gravimetric analysis (TGA). The AC-breakdown properties of the resulting composites is studied and the field dependency of the DC-conductivity is measured and also calculated using a space charge limited conduction (SCLC) model together with densities of states obtained from ab initio calculations. For composites containing 13 wt% of nanosilica, breakdown strengths some 18 % higher than that of the unfilled LDPE were obtained. However, the results are not stable over time. This appears to be related to how extensively the composite is dried at elevated temperatures under vacuum.
Virtanen, Suvi
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Vaughan, Alun
6d813b66-17f9-4864-9763-25a6d659d8a3
Yang, Lupeng
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Saiz, Fernan
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Quirke, Nick
631f103a-1811-42c9-9b54-700284bcca0f
Virtanen, Suvi
5f98459d-e6b8-45d4-bdf8-85d264b3f43a
Vaughan, Alun
6d813b66-17f9-4864-9763-25a6d659d8a3
Yang, Lupeng
3d3a7828-5cd9-4707-9f92-f34486a4c850
Saiz, Fernan
ae2b8d34-2da6-4edd-8162-7892a71614c7
Quirke, Nick
631f103a-1811-42c9-9b54-700284bcca0f

Virtanen, Suvi, Vaughan, Alun, Yang, Lupeng, Saiz, Fernan and Quirke, Nick (2016) Dielectric breakdown strength and electrical conductivity of low density polyethylene octylnanosilica composite. Conference on Electrical Insulation and Dielectric Phenomena, , Toronto, Canada. 16 - 19 Oct 2016. 4 pp .

Record type: Conference or Workshop Item (Paper)

Abstract

One challenge in studying nanodielectric composites is to produce reliable, reproducible samples. A common strategy to suppress aggregation and make the particles more compatible with the polymer matrix is to modify the nanoparticle surface chemistry but, often, evaluation of the effectiveness of the chosen surface functionalization process can prove difficult. In this paper the emphasis is on feasible ways to monitor the production of silane coupled nanosilica low density polyethylene (LDPE) composites, using Fourier transform infrared spectroscopy (FTIR) and thermal gravimetric analysis (TGA). The AC-breakdown properties of the resulting composites is studied and the field dependency of the DC-conductivity is measured and also calculated using a space charge limited conduction (SCLC) model together with densities of states obtained from ab initio calculations. For composites containing 13 wt% of nanosilica, breakdown strengths some 18 % higher than that of the unfilled LDPE were obtained. However, the results are not stable over time. This appears to be related to how extensively the composite is dried at elevated temperatures under vacuum.

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More information

Accepted/In Press date: 26 August 2016
e-pub ahead of print date: 16 October 2016
Venue - Dates: Conference on Electrical Insulation and Dielectric Phenomena, , Toronto, Canada, 2016-10-16 - 2016-10-19
Organisations: EEE

Identifiers

Local EPrints ID: 397419
URI: http://eprints.soton.ac.uk/id/eprint/397419
PURE UUID: 0c0a4061-6d2b-4a5e-950b-7e2c32b5b1f1
ORCID for Suvi Virtanen: ORCID iD orcid.org/0000-0003-0502-3183
ORCID for Alun Vaughan: ORCID iD orcid.org/0000-0002-0535-513X

Catalogue record

Date deposited: 01 Sep 2016 09:18
Last modified: 15 Mar 2024 03:06

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Contributors

Author: Suvi Virtanen ORCID iD
Author: Alun Vaughan ORCID iD
Author: Lupeng Yang
Author: Fernan Saiz
Author: Nick Quirke

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