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Impact of particle thermal treatment on dielectric properties of core-shell filled epoxy nano-composites

Impact of particle thermal treatment on dielectric properties of core-shell filled epoxy nano-composites
Impact of particle thermal treatment on dielectric properties of core-shell filled epoxy nano-composites
This paper presents the effect of Silica-Titania (SiO2@TiO2) core-shell nano-particles added into amine-cured epoxy composites, under three different particle treatment conditions: untreated, calcined at 250 ∘C and 450 ∘C , on the dielectric and structural properties of the bulk composite. Characterization was conducted using a range of methods Transmission Electron Microscopy (TEM), Fourier Transform Infra-Red Spectroscopy (FTIR), Raman Spectroscopy, Differential Scanning Calorimetry (DSC) and Broadband Dielectric Spectroscopy (BDS). TEM confirmed the synthesis of the core-shell architecture with denser shells at higher calcination temperatures. Raman spectroscopy showed an increase in the Ti-O-Ti network formation and orderliness with elevated temperature treatment. Incorporating untreated filler into epoxy reduces the bulk real permittivity, while the inclusion of calcined fillers leads to an increase. An additional ω relaxation was observed in imaginary permittivity spectra of nano-composites pointing towards altered molecular dynamics within the epoxy due to nano-particle addition. These findings highlight the role of core-shell nano-particles in modifying the dielectric properties of epoxy composites, whilst differentiating them from conventional nano-particles.
core-shell nano-particles, dielectric relaxations, epoxy nano-composites
IEEE
Chaudhary, S.
25f0d213-03ef-4909-8cfc-29a8498aa28f
Vryonis, O.
4affde05-88f2-436f-b036-dceedf31ea9c
Andritsch, T.
8681e640-e584-424e-a1f1-0d8b713de01c
Chaudhary, S.
25f0d213-03ef-4909-8cfc-29a8498aa28f
Vryonis, O.
4affde05-88f2-436f-b036-dceedf31ea9c
Andritsch, T.
8681e640-e584-424e-a1f1-0d8b713de01c

Chaudhary, S., Vryonis, O. and Andritsch, T. (2024) Impact of particle thermal treatment on dielectric properties of core-shell filled epoxy nano-composites. In 2024 IEEE 5th International Conference on Dielectrics (ICD). IEEE. 4 pp . (doi:10.1109/ICD59037.2024.10613284).

Record type: Conference or Workshop Item (Paper)

Abstract

This paper presents the effect of Silica-Titania (SiO2@TiO2) core-shell nano-particles added into amine-cured epoxy composites, under three different particle treatment conditions: untreated, calcined at 250 ∘C and 450 ∘C , on the dielectric and structural properties of the bulk composite. Characterization was conducted using a range of methods Transmission Electron Microscopy (TEM), Fourier Transform Infra-Red Spectroscopy (FTIR), Raman Spectroscopy, Differential Scanning Calorimetry (DSC) and Broadband Dielectric Spectroscopy (BDS). TEM confirmed the synthesis of the core-shell architecture with denser shells at higher calcination temperatures. Raman spectroscopy showed an increase in the Ti-O-Ti network formation and orderliness with elevated temperature treatment. Incorporating untreated filler into epoxy reduces the bulk real permittivity, while the inclusion of calcined fillers leads to an increase. An additional ω relaxation was observed in imaginary permittivity spectra of nano-composites pointing towards altered molecular dynamics within the epoxy due to nano-particle addition. These findings highlight the role of core-shell nano-particles in modifying the dielectric properties of epoxy composites, whilst differentiating them from conventional nano-particles.

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More information

Published date: 12 August 2024
Venue - Dates: 2024 IEEE 5th International Conference on Dielectrics (ICD), , Toulouse, France, 2024-06-30 - 2024-07-04
Keywords: core-shell nano-particles, dielectric relaxations, epoxy nano-composites

Identifiers

Local EPrints ID: 493539
URI: http://eprints.soton.ac.uk/id/eprint/493539
PURE UUID: 2eb08259-5c9c-4c01-9a4e-50905c231977
ORCID for S. Chaudhary: ORCID iD orcid.org/0000-0003-2664-7083
ORCID for O. Vryonis: ORCID iD orcid.org/0000-0002-2862-4494
ORCID for T. Andritsch: ORCID iD orcid.org/0000-0002-3462-022X

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Date deposited: 05 Sep 2024 17:09
Last modified: 12 Oct 2024 02:52

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Contributors

Author: S. Chaudhary ORCID iD
Author: O. Vryonis ORCID iD
Author: T. Andritsch ORCID iD

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