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Study on quantification method for dispersion and distribution of sphere/-like particles and relationship with AC/DC breakdown strength in polymer nanocomposites

Study on quantification method for dispersion and distribution of sphere/-like particles and relationship with AC/DC breakdown strength in polymer nanocomposites
Study on quantification method for dispersion and distribution of sphere/-like particles and relationship with AC/DC breakdown strength in polymer nanocomposites
Polymer nanocomposites are more and more researched and employed as dielectrics in electrical power equipment. However, the bad dispersion and distribution of particles are often reported to deteriorate the dielectric properties of polymer nanocomposites. In most cases, researchers tend to use SEM/TEM images with imprecise descriptions to describe these two factors, and there was still no clear relationship between their quantified particle dispersion characteristics and dielectric properties of polymer nanocomposites. This work is to, first, propose a combined quantification method to estimate the dispersion and distribution of spherical/ellipsoidal particles/aggregates in polymer nanocomposites based on SEM images of epoxy SiO2 nanocomposites. Based on the proposed quantification method, epoxy nanocomposite with surface treated SiO2 shows overall better dispersion and distribution of particles/aggregates than those with untreated ones. The presence of agglomerations would lead to the enhancement of mobility of charge carriers and thus reduction of breakdown strength, which become more obvious with the growth of filler loadings. It is found that, in AC breakdown tests, dispersion and distribution of particles/aggregates show little influence on the reduction of AC breakdown strength. However, those should be the main factor which influences the DC breakdown strength in epoxy nanocomposites with a variation of filler loading concentrations.
Nanotechnology, Silica, dielectric breakdown, electron microscopy, epoxy resins, quantification method
1070-9878
343-351
Chen, Guanghui
3de45a9c-6c9a-4bcb-90c3-d7e26be21819
Qiang, Dayuan
2a64f637-fc33-4722-ab29-4e8fd60895a1
Wang, Yan
f64021d0-1658-417b-93a7-b59055bd76f9
Alhabill, Fuad
253d8162-b329-46cc-ace6-5e39a8caca33
Andritsch, Thomas
8681e640-e584-424e-a1f1-0d8b713de01c
Chen, Guanghui
3de45a9c-6c9a-4bcb-90c3-d7e26be21819
Qiang, Dayuan
2a64f637-fc33-4722-ab29-4e8fd60895a1
Wang, Yan
f64021d0-1658-417b-93a7-b59055bd76f9
Alhabill, Fuad
253d8162-b329-46cc-ace6-5e39a8caca33
Andritsch, Thomas
8681e640-e584-424e-a1f1-0d8b713de01c

Chen, Guanghui, Qiang, Dayuan, Wang, Yan, Alhabill, Fuad and Andritsch, Thomas (2020) Study on quantification method for dispersion and distribution of sphere/-like particles and relationship with AC/DC breakdown strength in polymer nanocomposites. IEEE Transactions on Dielectrics & Electrical Insulation, 27 (2), 343-351, [9047075]. (doi:10.1109/TDEI.2019.008242).

Record type: Article

Abstract

Polymer nanocomposites are more and more researched and employed as dielectrics in electrical power equipment. However, the bad dispersion and distribution of particles are often reported to deteriorate the dielectric properties of polymer nanocomposites. In most cases, researchers tend to use SEM/TEM images with imprecise descriptions to describe these two factors, and there was still no clear relationship between their quantified particle dispersion characteristics and dielectric properties of polymer nanocomposites. This work is to, first, propose a combined quantification method to estimate the dispersion and distribution of spherical/ellipsoidal particles/aggregates in polymer nanocomposites based on SEM images of epoxy SiO2 nanocomposites. Based on the proposed quantification method, epoxy nanocomposite with surface treated SiO2 shows overall better dispersion and distribution of particles/aggregates than those with untreated ones. The presence of agglomerations would lead to the enhancement of mobility of charge carriers and thus reduction of breakdown strength, which become more obvious with the growth of filler loadings. It is found that, in AC breakdown tests, dispersion and distribution of particles/aggregates show little influence on the reduction of AC breakdown strength. However, those should be the main factor which influences the DC breakdown strength in epoxy nanocomposites with a variation of filler loading concentrations.

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TDEI_8242_Accepted_Darren - Accepted Manuscript
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More information

Accepted/In Press date: 7 July 2019
e-pub ahead of print date: 25 March 2020
Keywords: Nanotechnology, Silica, dielectric breakdown, electron microscopy, epoxy resins, quantification method

Identifiers

Local EPrints ID: 432350
URI: http://eprints.soton.ac.uk/id/eprint/432350
ISSN: 1070-9878
PURE UUID: 87fe6144-446a-4e83-8b18-b58ce99ec222
ORCID for Thomas Andritsch: ORCID iD orcid.org/0000-0002-3462-022X

Catalogue record

Date deposited: 11 Jul 2019 16:30
Last modified: 15 Sep 2021 02:01

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Contributors

Author: Guanghui Chen
Author: Dayuan Qiang
Author: Yan Wang
Author: Fuad Alhabill
Author: Thomas Andritsch ORCID iD

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