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3D Vertically Aligned BNNS Network with Long-Range Continuous Channels for Achieving a Highly Thermally Conductive
Xiongwei Wang1,2, Peiyi Wu1,2
1State Key Laboratory for Modification of Chemical Fibers and Polymer Materials, College of Chemistry, Chemical Engineering and Biotechnology, Center for Advanced Low-Dimension Materials , Donghua University , Shanghai 201620 , P. R. China.
ACS Applied Materials & Interfaces
|July 31, 2019
Summary
Researchers developed a novel epoxy composite with a 3D vertically aligned boron nitride nanosheet (BNNS) network. This material achieves high thermal conductivity for efficient heat dissipation in electronics.
Area of Science:
- Materials Science
- Polymer Science
- Nanotechnology
Background:
- Vertically aligned filler networks in polymers enhance thermal conductivity.
- Creating continuous channels for high-flux heat conduction remains challenging.
Purpose of the Study:
- To develop a polymer composite with a 3D vertically aligned boron nitride nanosheet (BNNS) network.
- To achieve high through-plane thermal conductivity for efficient heat dissipation.
Main Methods:
- Utilized nanofibrillated cellulose (NFCs) assisted unidirectional freeze-drying.
- Prepared an epoxy composite with BNNS using a slurry method.
Main Results:
- Achieved a 3D vertically aligned BNNS network with long-range continuous pore channels.
- Obtained a high through-plane thermal conductivity of 1.56 W m-1 K-1.
- Reached a thermal conductivity enhancement efficiency of 167.3 per 1 vol % BNNS at 4.4 vol % loading.
Conclusions:
- The developed composite demonstrates significant potential for heat dissipation in modern electronics.
- This method provides insight into preparing high thermal conductivity polymer composites.
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