Vertically Aligned Silicon Carbide Nanowires/Boron Nitride Cellulose Aerogel Networks Enhanced Thermal Conductivity and Electromagnetic Absorbing of Epoxy Composites

Pan, Duo, Yang, Gui, Abo-Dief, Hala, Dong, Jingwen, Su, Fengmei, Liu, Chuntai, Li, Yifan, Xu, Bin, Murugadoss, Vignesh, Naik, Nithesh, El-Bahy, Salah, Huang, Minan and Guo, Zhanhu (2022) Vertically Aligned Silicon Carbide Nanowires/Boron Nitride Cellulose Aerogel Networks Enhanced Thermal Conductivity and Electromagnetic Absorbing of Epoxy Composites. Nano-Micro Letters, 14 (1). p. 118. ISSN 2150-5551

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Official URL: https://doi.org/10.1007/s40820-022-00863-z

Abstract

With the innovation of microelectronics technology, the heat dissipation problem inside the device will face a severe test. In this work, cellulose aerogel (CA) with highly enhanced thermal conductivity (TC) in vertical planes were successfully obtained by constructing a vertically aligned silicon carbide nanowires (SiC NWs)/boron nitride (BN) network via the ice template assisted strategy. The unique network structure of SiC NWs connected to BN ensures that the TC of the composite in the vertical direction reaches 2.21 W/(m·K) at a low hybrid filler loading of 16.69 wt, which was increased by 890 compared to pure epoxy (EP). In addition, relying on unique porous network structure of CA, EP based composite also showed higher TC than other comparative samples in the horizontal direction. Meanwhile, the composite exhibits good electrically insulating with a volume electrical resistivity about 2.35×1011 Ω·cm, and displays excellent electromagnetic wave absorption performance with a minimum reflection loss of -21.5 dB and a wide effective absorption bandwidth (< -10 dB) from 8.8 to 11.6 GHz. Therefore, this work provides a new strategy for manufacturing polymer-based composites with excellent multifunctional performances in microelectronic packaging applications.

Item Type: Article
Additional Information: Funding information: We acknowledge for the financial support from National Natural Science Foundation of China (21704096, 51703217) and the China Postdoctoral Science Foundation (Grant No. 2019M662526). The authors also gratefully acknowledge financial support from Taif University Researchers Supporting Project Number (TURSP-2020/135), Taif University, Taif, Saudi Arabia.
Uncontrolled Keywords: Epoxy, Ice template, Vertical alignment, Thermal conductivity, Multifunctionality
Subjects: F200 Materials Science
H800 Chemical, Process and Energy Engineering
Department: Faculties > Engineering and Environment > Mechanical and Construction Engineering
Depositing User: Rachel Branson
Date Deposited: 07 Apr 2022 10:09
Last Modified: 04 May 2022 10:00
URI: http://nrl.northumbria.ac.uk/id/eprint/48838

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