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The effect of surface modification on the dielectric properties of polypropylene/aluminum nitride nanocomposites

The effect of surface modification on the dielectric properties of polypropylene/aluminum nitride nanocomposites
The effect of surface modification on the dielectric properties of polypropylene/aluminum nitride nanocomposites
Due to the excellent dielectric properties and potential high operation temperature, polypropylene (PP) is considered as a great potential for renewable High Voltage Direct Current (HVDC) cable insulation material. However, the development and application of PP are limited by its relatively poor thermal conductivity [1]. Nano-fillers with high thermal conductivity, such as aluminum nitride (AlN) have been used to improve the thermal conductivity and maintain the dielectric properties at the same time. Based on recent studies, the polymer-particle interphase region is believed to have a significant influence on the dielectric properties of nanocomposites. Thus, the proposed work is to investigate the influence of polymer-particle interphase by obtaining diverse particle surface states via different surface treatments.

The experimental work start with sample preparation. Two different Silane Coupling Agents (SCA) were selected to obtain distinct surface states of Nano-AlN. The PP/AlN nanocomposite samples were made by solvent blend method with different AlN weight percent (5 wt.% and 10 wt.%). For AC breakdown strength, samples were placed between two ball electrodes with an increasing voltage of 500 V/s until samples breakdown. Dielectric spectroscopy test was used to analyze the polymer-particle interphase properties, the applied voltage is 3 V with the frequency range of 10-1~105 Hz, and the sample thickness is 210 μm.

In present work, two different SCA treated Nano-AlN with PP nanocomposites show a distinct difference on both AC breakdown and dielectric response results, which indicate the dielectric properties of PP/AlN nanocomposites are highly related to the polymer-particle interphase state. In order to obtain a more comprehensively understanding of interphase properties, more work in regard of the dielectric properties of Nano-AlN/PP need to be investigated in the future.

[1] X. Huang, P. Jiang and T. Tanaka, "A review of dielectric polymer composites with high thermal conductivity", IEEE Electrical Insulation Magazine, vol. 27, no. 4, pp. 8-16, 2011.
Wang, Xinyu
b0de6d39-87db-4bda-a097-a8ec50804a4a
Andritsch, Thomas
8681e640-e584-424e-a1f1-0d8b713de01c
Chen, George
3de45a9c-6c9a-4bcb-90c3-d7e26be21819
Wang, Xinyu
b0de6d39-87db-4bda-a097-a8ec50804a4a
Andritsch, Thomas
8681e640-e584-424e-a1f1-0d8b713de01c
Chen, George
3de45a9c-6c9a-4bcb-90c3-d7e26be21819

Wang, Xinyu, Andritsch, Thomas and Chen, George (2018) The effect of surface modification on the dielectric properties of polypropylene/aluminum nitride nanocomposites. 11th Universities High Voltage Network Colloquium, Winchester, United Kingdom. 15 - 16 Jan 2018.

Record type: Conference or Workshop Item (Poster)

Abstract

Due to the excellent dielectric properties and potential high operation temperature, polypropylene (PP) is considered as a great potential for renewable High Voltage Direct Current (HVDC) cable insulation material. However, the development and application of PP are limited by its relatively poor thermal conductivity [1]. Nano-fillers with high thermal conductivity, such as aluminum nitride (AlN) have been used to improve the thermal conductivity and maintain the dielectric properties at the same time. Based on recent studies, the polymer-particle interphase region is believed to have a significant influence on the dielectric properties of nanocomposites. Thus, the proposed work is to investigate the influence of polymer-particle interphase by obtaining diverse particle surface states via different surface treatments.

The experimental work start with sample preparation. Two different Silane Coupling Agents (SCA) were selected to obtain distinct surface states of Nano-AlN. The PP/AlN nanocomposite samples were made by solvent blend method with different AlN weight percent (5 wt.% and 10 wt.%). For AC breakdown strength, samples were placed between two ball electrodes with an increasing voltage of 500 V/s until samples breakdown. Dielectric spectroscopy test was used to analyze the polymer-particle interphase properties, the applied voltage is 3 V with the frequency range of 10-1~105 Hz, and the sample thickness is 210 μm.

In present work, two different SCA treated Nano-AlN with PP nanocomposites show a distinct difference on both AC breakdown and dielectric response results, which indicate the dielectric properties of PP/AlN nanocomposites are highly related to the polymer-particle interphase state. In order to obtain a more comprehensively understanding of interphase properties, more work in regard of the dielectric properties of Nano-AlN/PP need to be investigated in the future.

[1] X. Huang, P. Jiang and T. Tanaka, "A review of dielectric polymer composites with high thermal conductivity", IEEE Electrical Insulation Magazine, vol. 27, no. 4, pp. 8-16, 2011.

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More information

Published date: 16 January 2018
Venue - Dates: 11th Universities High Voltage Network Colloquium, Winchester, United Kingdom, 2018-01-15 - 2018-01-16

Identifiers

Local EPrints ID: 422386
URI: https://eprints.soton.ac.uk/id/eprint/422386
PURE UUID: ab73b75c-da35-40a4-8bc8-7083c2d780ae
ORCID for Xinyu Wang: ORCID iD orcid.org/0000-0001-9434-2906
ORCID for Thomas Andritsch: ORCID iD orcid.org/0000-0002-3462-022X

Catalogue record

Date deposited: 23 Jul 2018 16:30
Last modified: 14 Mar 2019 01:34

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