Highly thermally conductive 3D BN/MWCNTs/C spatial network composites with improved electrically insulating and flame retardancy prepared by biological template assisted method

Pan, Duo and Luo, Shilu and Feng, Yao and Zhang, Xiaodong and Su, Fengmei and Liu, Hu and Liu, Chuntai and Mai, Xianmin and Naik, Nithesh and Guo, Zhanhu (2021) Highly thermally conductive 3D BN/MWCNTs/C spatial network composites with improved electrically insulating and flame retardancy prepared by biological template assisted method. Composites Part B, 222. ISSN 1359-8368

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Abstract

Boron nitride/multiwalled carbon nanotubes/carbon (BN/MWCNTs/C) networks were prepared via a rape pollen (RP) biological template assisted strategy. The highly thermally conductive epoxy resin (EP) composites were prepared by impregnating EP into the 3D BN/MWCNTs/C networks. Fourier transform infrared spectra and X-ray photoelectron spectroscopy analyses indicated that the successful modification of BN (m-BN) and the interaction between RP, carboxyl functionalized MWCNTs (c-MWCNTs) and m-BN. Scanning electron micro�scopy images clearly present the network morphology constructed by MWCNTs connected to m-BN. Thermog�ravimetric analyzer curves determine the mass concentration of m-BN in EP-based composites. The thermal conductivity (K) reached 1.84 W/(m⋅K) in the composites at a BN content of 21.3 wt%, displaying a significant enhancement of 868% compared with pure EP. The enhanced K is attributed to the effective connection of BN by the MWCNTs covered on the surface of RP. Meanwhile, the composites exhibit a tensile strength of 39.2 MPa, electrically insulating with a volume electrical resistivity about 9.17 × 1010 Ω cm and good flame retardancy

Item Type: Article
Uncontrolled Keywords: Epoxy composites Biological template Thermal conductivity Electrically insulating Flame retardancy
Subjects: Engineering > MIT Manipal > Mechanical and Manufacturing
Depositing User: MIT Library
Date Deposited: 09 Dec 2021 10:04
Last Modified: 09 Dec 2021 10:04
URI: http://eprints.manipal.edu/id/eprint/157505

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