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The role of the filler surface chemistry on the dielectric and thermal properties of polypropylene aluminium nitride nanocomposites

The role of the filler surface chemistry on the dielectric and thermal properties of polypropylene aluminium nitride nanocomposites
The role of the filler surface chemistry on the dielectric and thermal properties of polypropylene aluminium nitride nanocomposites
In nanocomposites, different surface states of nanoparticles can potentially provide different interactions with the base polymer and in turn change the bulk properties. Aluminium nitride (AlN) nanoparticles were surface functionalised with three different silane coupling agents (SCAs) with varying organofunctional and hydrolysable groups. The effects of the filler surface chemistry on the resulting AlN/polypropylene (PP) nanocomposites were examined and compared with an unfilled reference system. It is observed that different organofunctional groups can provide different nucleating effects and the dispersion states of nanoparticles while the hydrolysable group is not the dominant factor. The dielectric spectroscopy results show the hydrolysable group of SCA will also result in a difference of the interphase since the trimethoxy silane treated systems show much higher imaginary permittivity than the triethoxy silane treated systems when the frequency is below 1 Hz. The grafted organofunctional layer on the particle surface can provide a significant improvement of the thermal conductivity of the composite materials, e.g. 15 % improvement in thermal conductivity was observed when adding 10 wt% methacrylate silanes treated nano-AlN into PP, while the untreated counterpart only has 5 % improvement.
1070-9878
1009-1017
Wang, Xinyu
b0de6d39-87db-4bda-a097-a8ec50804a4a
Andritsch, Thomas
8681e640-e584-424e-a1f1-0d8b713de01c
Chen, George
3de45a9c-6c9a-4bcb-90c3-d7e26be21819
Virtanen, Suvi
5f98459d-e6b8-45d4-bdf8-85d264b3f43a
Wang, Xinyu
b0de6d39-87db-4bda-a097-a8ec50804a4a
Andritsch, Thomas
8681e640-e584-424e-a1f1-0d8b713de01c
Chen, George
3de45a9c-6c9a-4bcb-90c3-d7e26be21819
Virtanen, Suvi
5f98459d-e6b8-45d4-bdf8-85d264b3f43a

Wang, Xinyu, Andritsch, Thomas, Chen, George and Virtanen, Suvi (2019) The role of the filler surface chemistry on the dielectric and thermal properties of polypropylene aluminium nitride nanocomposites. IEEE Transactions on Dielectrics & Electrical Insulation, 26 (3), 1009-1017. (doi:10.1109/TDEI.2019.007773).

Record type: Article

Abstract

In nanocomposites, different surface states of nanoparticles can potentially provide different interactions with the base polymer and in turn change the bulk properties. Aluminium nitride (AlN) nanoparticles were surface functionalised with three different silane coupling agents (SCAs) with varying organofunctional and hydrolysable groups. The effects of the filler surface chemistry on the resulting AlN/polypropylene (PP) nanocomposites were examined and compared with an unfilled reference system. It is observed that different organofunctional groups can provide different nucleating effects and the dispersion states of nanoparticles while the hydrolysable group is not the dominant factor. The dielectric spectroscopy results show the hydrolysable group of SCA will also result in a difference of the interphase since the trimethoxy silane treated systems show much higher imaginary permittivity than the triethoxy silane treated systems when the frequency is below 1 Hz. The grafted organofunctional layer on the particle surface can provide a significant improvement of the thermal conductivity of the composite materials, e.g. 15 % improvement in thermal conductivity was observed when adding 10 wt% methacrylate silanes treated nano-AlN into PP, while the untreated counterpart only has 5 % improvement.

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Accepted/In Press date: 26 January 2019
e-pub ahead of print date: 29 May 2019
Published date: June 2019

Identifiers

Local EPrints ID: 428008
URI: https://eprints.soton.ac.uk/id/eprint/428008
ISSN: 1070-9878
PURE UUID: 7f485022-2d0f-4e4b-bf73-78c2d093ef9a
ORCID for Xinyu Wang: ORCID iD orcid.org/0000-0001-9434-2906
ORCID for Thomas Andritsch: ORCID iD orcid.org/0000-0002-3462-022X
ORCID for Suvi Virtanen: ORCID iD orcid.org/0000-0003-0502-3183

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Date deposited: 06 Feb 2019 17:30
Last modified: 08 Oct 2019 04:02

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Contributors

Author: Xinyu Wang ORCID iD
Author: Thomas Andritsch ORCID iD
Author: George Chen
Author: Suvi Virtanen ORCID iD

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