Staff View: The role of silicon-based nanofillers and polymer crystallization on the breakdown behaviors of polyethylene blend nanocomposites

The role of silicon-based nanofillers and polymer crystallization on the breakdown behaviors of polyethylene blend nanocomposites

Good breakdown strength is an important feature for the selection of dielectric materials, especially in high-voltage engineering. Although nanocomposites have been shown to possess many promising dielectric properties, the breakdown strength of nanocomposites is often found to be negatively affecte...

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Main Authors:	Kamarudin, S. N., Lau, K. Y., Tan, C. W., Ching, K. Y.
Format:	Article
Language:	English
Published:	World Scientific Publishing 2020
Subjects:	TK Electrical engineering. Electronics Nuclear engineering
Online Access:	http://eprints.utm.my/id/eprint/93870/1/LauKwanYiew2020_TheRoleofSiliconBasedNanofillers.pdf http://eprints.utm.my/id/eprint/93870/ https://doi.org/10.1142/S1793292020500976
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spelling	my.utm.938702022-01-31T08:36:58Z http://eprints.utm.my/id/eprint/93870/ The role of silicon-based nanofillers and polymer crystallization on the breakdown behaviors of polyethylene blend nanocomposites Kamarudin, S. N. Lau, K. Y. Tan, C. W. Ching, K. Y. TK Electrical engineering. Electronics Nuclear engineering Good breakdown strength is an important feature for the selection of dielectric materials, especially in high-voltage engineering. Although nanocomposites have been shown to possess many promising dielectric properties, the breakdown strength of nanocomposites is often found to be negatively affected. Recently, imposing nonisothermal crystallization processes on polyethylene blends has been demonstrated to be favorable for breakdown strength improvements of dielectric materials. In an attempt to increase nanocomposites' voltage rating, this work reports on the effects of nonisothermal crystallization (fast, moderate and slow crystallizations) on the structure and dielectric properties of a polyethylene blend (PE) composed of 80% low density polyethylene and 20% high density polyethylene, added with silicon dioxide (SiO2) and silicon nitride (Si3N4) nanofillers. Through breakdown testing, the breakdown performance of Si3N4-based nanocomposites was better than SiO2-based nanocomposites. Since nanofiller dispersion within both nanocomposite systems was comparable, the enhanced breakdown performance of Si3N4-based nanocomposites is attributed to the surface chemistry of Si3N4 containing less hydroxyl groups than SiO2. Furthermore, the breakdown strength of SiO2-based nanocomposites and Si3N4-based nanocomposites improved, with the DC breakdown strength increasing by at least 12% when both the nanocomposites were subjected to moderate crystallization rather than fast and slow crystallizations. This is attributed to changes in the underlying molecular conformation of PE in addition to water-related effects. These results suggest that apart from changes in the nanofiller surface chemistry, changes in the underlying molecular conformation of polymers are also important to improve the breakdown performance of nanocomposites. World Scientific Publishing 2020 Article PeerReviewed application/pdf en http://eprints.utm.my/id/eprint/93870/1/LauKwanYiew2020_TheRoleofSiliconBasedNanofillers.pdf Kamarudin, S. N. and Lau, K. Y. and Tan, C. W. and Ching, K. Y. (2020) The role of silicon-based nanofillers and polymer crystallization on the breakdown behaviors of polyethylene blend nanocomposites. Nano, 15 (8). ISSN 1793-2920 https://doi.org/10.1142/S1793292020500976 DOI: 10.1142/S1793292020500976
institution	Universiti Teknologi Malaysia
building	UTM Library
collection	Institutional Repository
continent	Asia
country	Malaysia
content_provider	Universiti Teknologi Malaysia
content_source	UTM Institutional Repository
url_provider	http://eprints.utm.my/
language	English
topic	TK Electrical engineering. Electronics Nuclear engineering
spellingShingle	TK Electrical engineering. Electronics Nuclear engineering Kamarudin, S. N. Lau, K. Y. Tan, C. W. Ching, K. Y. The role of silicon-based nanofillers and polymer crystallization on the breakdown behaviors of polyethylene blend nanocomposites
description	Good breakdown strength is an important feature for the selection of dielectric materials, especially in high-voltage engineering. Although nanocomposites have been shown to possess many promising dielectric properties, the breakdown strength of nanocomposites is often found to be negatively affected. Recently, imposing nonisothermal crystallization processes on polyethylene blends has been demonstrated to be favorable for breakdown strength improvements of dielectric materials. In an attempt to increase nanocomposites' voltage rating, this work reports on the effects of nonisothermal crystallization (fast, moderate and slow crystallizations) on the structure and dielectric properties of a polyethylene blend (PE) composed of 80% low density polyethylene and 20% high density polyethylene, added with silicon dioxide (SiO2) and silicon nitride (Si3N4) nanofillers. Through breakdown testing, the breakdown performance of Si3N4-based nanocomposites was better than SiO2-based nanocomposites. Since nanofiller dispersion within both nanocomposite systems was comparable, the enhanced breakdown performance of Si3N4-based nanocomposites is attributed to the surface chemistry of Si3N4 containing less hydroxyl groups than SiO2. Furthermore, the breakdown strength of SiO2-based nanocomposites and Si3N4-based nanocomposites improved, with the DC breakdown strength increasing by at least 12% when both the nanocomposites were subjected to moderate crystallization rather than fast and slow crystallizations. This is attributed to changes in the underlying molecular conformation of PE in addition to water-related effects. These results suggest that apart from changes in the nanofiller surface chemistry, changes in the underlying molecular conformation of polymers are also important to improve the breakdown performance of nanocomposites.
format	Article
author	Kamarudin, S. N. Lau, K. Y. Tan, C. W. Ching, K. Y.
author_facet	Kamarudin, S. N. Lau, K. Y. Tan, C. W. Ching, K. Y.
author_sort	Kamarudin, S. N.
title	The role of silicon-based nanofillers and polymer crystallization on the breakdown behaviors of polyethylene blend nanocomposites
title_short	The role of silicon-based nanofillers and polymer crystallization on the breakdown behaviors of polyethylene blend nanocomposites
title_full	The role of silicon-based nanofillers and polymer crystallization on the breakdown behaviors of polyethylene blend nanocomposites
title_fullStr	The role of silicon-based nanofillers and polymer crystallization on the breakdown behaviors of polyethylene blend nanocomposites
title_full_unstemmed	The role of silicon-based nanofillers and polymer crystallization on the breakdown behaviors of polyethylene blend nanocomposites
title_sort	role of silicon-based nanofillers and polymer crystallization on the breakdown behaviors of polyethylene blend nanocomposites
publisher	World Scientific Publishing
publishDate	2020
url	http://eprints.utm.my/id/eprint/93870/1/LauKwanYiew2020_TheRoleofSiliconBasedNanofillers.pdf http://eprints.utm.my/id/eprint/93870/ https://doi.org/10.1142/S1793292020500976
_version_	1724073277194764288
score	13.211869

The role of silicon-based nanofillers and polymer crystallization on the breakdown behaviors of polyethylene blend nanocomposites

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