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
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Yang, Lupeng
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Saiz, Fernan
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Quirke, Nick
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Virtanen, Suvi
5f98459d-e6b8-45d4-bdf8-85d264b3f43a
Vaughan, Alun
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Yang, Lupeng
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Saiz, Fernan
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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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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
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Local EPrints ID: 397419
URI: http://eprints.soton.ac.uk/id/eprint/397419
PURE UUID: 0c0a4061-6d2b-4a5e-950b-7e2c32b5b1f1
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Date deposited: 01 Sep 2016 09:18
Last modified: 15 Mar 2024 03:06
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Contributors
Author:
Suvi Virtanen
Author:
Alun Vaughan
Author:
Lupeng Yang
Author:
Fernan Saiz
Author:
Nick Quirke
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