The effects of the hexagonal boron nitride nanoflake properties on the thermal conductivity of hexagonal boron nitride nanoflake/silicone rubber composites
Hexagonal boron nitride nanoflakes (h-BNNFs) are usually selected as fillers to improve the thermal conductivity of polymer materials. However, previous research mainly focused on the influence of h-BNNF content and orientation. In this report, the effects of the content, geometry, thickness, modifi...
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Published in | Composites. Part A, Applied science and manufacturing Vol. 127; p. 105629 |
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Main Authors | , , , , , , , , , , |
Format | Journal Article |
Language | English |
Published |
Elsevier Ltd
01.12.2019
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Subjects | |
Online Access | Get full text |
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Summary: | Hexagonal boron nitride nanoflakes (h-BNNFs) are usually selected as fillers to improve the thermal conductivity of polymer materials. However, previous research mainly focused on the influence of h-BNNF content and orientation. In this report, the effects of the content, geometry, thickness, modification and orientation of h-BNNFs on the thermal conductivity of h-BNNF/polymer composites were systematically investigated based on the h-BNNF/silicone rubber (h-BNNF/SR) composites. The thermal conductivity of h-BNNF/SR composites increased tremendously with the increase of h-BNNF content. Meanwhile, the h-BNNF contents also show great effects on the viscosity, hardness and thermal stability of the composites, and the h-BNNF content of 20% is more advantageous for processing and application of the composites. Besides, modified, flake-like and thinner h-BNNFs can result in better reinforcement in thermal conductivity than unmodified, agglomerated and thicker ones. h-BNNF/SR composites with shear force induced oriented h-BNNFs showed further enhanced thermal conductivity, and the composite with 40 wt% oriented h-BNNFs exhibits the best thermal conductivity of 0.901 W/(m K). |
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ISSN: | 1359-835X 1878-5840 |
DOI: | 10.1016/j.compositesa.2019.105629 |