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Calcined silica for enhanced polyethylene nano composites

Calcined silica for enhanced polyethylene nano composites
Calcined silica for enhanced polyethylene nano composites
In this paper the dielectric performance of polymer composites containing untreated silica nanoparticles is compared with those containing calcined nanosilica. Nanosilica (as delivered by the supplier) is calcined at 1050 ºC for 10 h under an atmosphere of dry nitrogen. Efficacy of treatment is confirmed by Fourier transform Infrared spectroscopy (FTIR) and thermogravimetric analysis (TGA); the measurements being consistent with a marked reduction in both surface adsorbed water and in the number of surface hydroxyl groups. It is demonstrated that calcination imparts a lasting hydrophobicity to the nanoparticles which reduces the capacity for water absorption in the resulting nanocomposites. The reduced water content of composites containing calcined nanosilica leads to higher DC breakdown strength and lower dielectric loss. It is concluded that calcination imparts one of the major benefits of functionalization (removal of surface hydroxyl groups) but eliminates the need for complex chemical processing.
0003-6951
1-4
Praeger, M.
84575f28-4530-4f89-9355-9c5b6acc6cac
Hosier, I.L.
6a44329e-b742-44de-afa7-073f80a78e26
Vaughan, A.S.
6d813b66-17f9-4864-9763-25a6d659d8a3
Swingler, S.G.
4f13fbb2-7d2e-480a-8687-acea6a4ed735
Praeger, M.
84575f28-4530-4f89-9355-9c5b6acc6cac
Hosier, I.L.
6a44329e-b742-44de-afa7-073f80a78e26
Vaughan, A.S.
6d813b66-17f9-4864-9763-25a6d659d8a3
Swingler, S.G.
4f13fbb2-7d2e-480a-8687-acea6a4ed735

Praeger, M., Hosier, I.L., Vaughan, A.S. and Swingler, S.G. (2015) Calcined silica for enhanced polyethylene nano composites. Applied Physics Letters, 1-4. (Submitted)

Record type: Article

Abstract

In this paper the dielectric performance of polymer composites containing untreated silica nanoparticles is compared with those containing calcined nanosilica. Nanosilica (as delivered by the supplier) is calcined at 1050 ºC for 10 h under an atmosphere of dry nitrogen. Efficacy of treatment is confirmed by Fourier transform Infrared spectroscopy (FTIR) and thermogravimetric analysis (TGA); the measurements being consistent with a marked reduction in both surface adsorbed water and in the number of surface hydroxyl groups. It is demonstrated that calcination imparts a lasting hydrophobicity to the nanoparticles which reduces the capacity for water absorption in the resulting nanocomposites. The reduced water content of composites containing calcined nanosilica leads to higher DC breakdown strength and lower dielectric loss. It is concluded that calcination imparts one of the major benefits of functionalization (removal of surface hydroxyl groups) but eliminates the need for complex chemical processing.

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More information

Submitted date: 17 December 2015
Organisations: EEE

Identifiers

Local EPrints ID: 385461
URI: http://eprints.soton.ac.uk/id/eprint/385461
ISSN: 0003-6951
PURE UUID: 0399d466-88e6-431a-b09c-935770987321
ORCID for M. Praeger: ORCID iD orcid.org/0000-0002-5814-6155
ORCID for I.L. Hosier: ORCID iD orcid.org/0000-0003-4365-9385
ORCID for A.S. Vaughan: ORCID iD orcid.org/0000-0002-0535-513X

Catalogue record

Date deposited: 20 Jan 2016 09:35
Last modified: 13 Aug 2020 01:38

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