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Influence of Nanoparticle Surfaces on the Electrical Breakdown Strength of Nanoparticle-Filled Low-Density Polyethylene

Published online by Cambridge University Press:  03 March 2011

Dongling Ma ,
Richard W. Siegel ,
Jung-Il Hong ,
Linda S. Schadler ,
Eva Mårtensson  and
Carina Önneby
Dongling Ma
Affiliation:
Materials Science and Engineering Department and Rensselaer Nanotechnology Center, Rensselaer Polytechnic Institute, Troy, New York 12180
Richard W. Siegel
Affiliation:
Materials Science and Engineering Department and Rensselaer Nanotechnology Center, Rensselaer Polytechnic Institute, Troy, New York 12180
Jung-Il Hong
Affiliation:
Materials Science and Engineering Department and Rensselaer Nanotechnology Center, Rensselaer Polytechnic Institute, Troy, New York 12180
Linda S. Schadler
Affiliation:
Materials Science and Engineering Department and Rensselaer Nanotechnology Center, Rensselaer Polytechnic Institute, Troy, New York 12180
Eva Mårtensson
Affiliation:
ABB AB, Department H, Västerås, S-721 78, Sweden
Carina Önneby
Affiliation:
ABB AB, Department H, Västerås, S-721 78, Sweden
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Abstract

The electrical breakdown strength of TiO2 nanoparticle-filled low-density polyethylene (LDPE) nanocomposites was investigated. It was found that the surface water on the nanoparticles played a very important role in determining the breakdown strength. The breakdown strength at 63.2% cumulative failure probability (E0) for the composites filled with dried nanoscale TiO2 was similar to that of neat LDPE and 50% higher than that for the samples filled with as-received nanoscale TiO2. This increase was due to a better dispersion, a better interface, and a morphology change of the matrix. It was also found that surface modification of nanoscale TiO2 had a significant influence on the breakdown strength. N-(2-aminoethyl) 3-aminopropyl-trimethoxysilane (AEAPS)-coated TiO2-filled samples showed about 40% higher E0 than that of uncoated, as-received TiO2-filled samples. This was mainly due to enhanced electron scattering because of the presence of polar groups in AEAPS.

Keywords

Electrical propertiesDielectricNanoparticle
Type
Articles
Information
Journal of Materials Research , Volume 19 , Issue 3 , March 2004 , pp. 857 - 863
Copyright
Copyright © Materials Research Society 2004

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