Learning from Natural Nacre: Constructing Layered Polymer Composites with High Thermal Conductivity
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AbstractInspired by the microstructures of naturally layered and highly oriented materials, such as natural nacre, we report a thermally conductive polymer composite that consists of epoxy resin and Al2O3 platelets deposited with silver nanoparticles (AgNPs). Owing to their unique two-dimensional structure, Al2O3 platelets are stacked together via a hot-pressing technique, resulting in a brick-and-mortar structure, which is similar to the one of natural nacre. Moreover, the AgNPs deposited on the surfaces of the Al2O3 platelets act as bridges that link the adjacent Al2O3 platelets due to the reduced melting point of the AgNPs. As a result, the polymer composite with 50 wt % filler achieves a maximum thermal conductivity of 6.71 W m–1 K–1. In addition, the small addition of AgNPs (0.6 wt %) minimally affects the electrical insulation of the composites. Our bioinspired approach will find uses in the design and fabrication of thermally conductive materials for thermal management in modern electronics.
All Author(s) ListG. R. Pan, Y. M. Yao, X. L. Zeng, J. J. Sun, J. Hu, R. Sun, J. B. Xu, C. P. Wong
Journal nameACS Applied Materials and Interfaces
Year2017
Month9
Volume Number9
Issue Number38
PublisherAmerican Chemical Society
Pages33001 - 33010
ISSN1944-8244
eISSN1944-8252
LanguagesEnglish-United States

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