The exfoliation and functionalization of boron nitride nanosheets and their utilization in silicone composites with improved thermal conductivity

The exfoliation and functionalization of boron nitride nanosheets and their utilization in... An efficient method is reported to fabricate boron nitride nanosheets (BNNSs) using a sonication technique in mixed solvents, and functionalization of BNNSs is performed by polydopamine (PDA). The BNNSs showed good dispersibility in mixture solvent. And the functionalization of BNNSs by PDA (named as BNNSs@PDA), can further improve its stability in water. The morphologies of the BNNSs and BNNSs@PDA were characterized by AFM, SEM, and TEM, which confirm the successful exfoliation and functionalization of BNNSs. Furthermore, silicone composites were fabricated by adding BNNSs and BNNSs@PDA, respectively. Compared with neat silicone (0.20 W m−1K−1), the thermal conductivity of silicone composite with 12 wt% BNNSs@PDA increases highly by 90% to 0.38 W m−1K−1. The thermal stability of silicone/BNNSs@PDA composite is also improved. The significantly improved thermal conductivity and thermal stability are attributed to the good dispersion of BNNSs@PDA and stronger interaction between BNNSs@PDA surface and silicone matrix. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Journal of Materials Science: Materials in Electronics Springer Journals

The exfoliation and functionalization of boron nitride nanosheets and their utilization in silicone composites with improved thermal conductivity

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Publisher
Springer US
Copyright
Copyright © 2017 by Springer Science+Business Media New York
Subject
Materials Science; Optical and Electronic Materials; Characterization and Evaluation of Materials
ISSN
0957-4522
eISSN
1573-482X
D.O.I.
10.1007/s10854-017-7130-0
Publisher site
See Article on Publisher Site

Abstract

An efficient method is reported to fabricate boron nitride nanosheets (BNNSs) using a sonication technique in mixed solvents, and functionalization of BNNSs is performed by polydopamine (PDA). The BNNSs showed good dispersibility in mixture solvent. And the functionalization of BNNSs by PDA (named as BNNSs@PDA), can further improve its stability in water. The morphologies of the BNNSs and BNNSs@PDA were characterized by AFM, SEM, and TEM, which confirm the successful exfoliation and functionalization of BNNSs. Furthermore, silicone composites were fabricated by adding BNNSs and BNNSs@PDA, respectively. Compared with neat silicone (0.20 W m−1K−1), the thermal conductivity of silicone composite with 12 wt% BNNSs@PDA increases highly by 90% to 0.38 W m−1K−1. The thermal stability of silicone/BNNSs@PDA composite is also improved. The significantly improved thermal conductivity and thermal stability are attributed to the good dispersion of BNNSs@PDA and stronger interaction between BNNSs@PDA surface and silicone matrix.

Journal

Journal of Materials Science: Materials in ElectronicsSpringer Journals

Published: May 24, 2017

References

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