Cited 18 time in webofscience Cited 20 time in scopus

Improved thermal conductivity of carbon-based thermal interface materials by high-magnetic-field alignment

Title
Improved thermal conductivity of carbon-based thermal interface materials by high-magnetic-field alignment
Authors
Chung, Seok-HwanKim, HoyoungJeong, Sang Won
DGIST Authors
Chung, Seok-HwanKim, HoyoungJeong, Sang Won
Issue Date
2018-12
Citation
Carbon, 140, 24-29
Type
Article
Article Type
Article
Keywords
GRAPHITE NANOPLATELETGRAPHENECOMPOSITESFILLERSNANOCOMPOSITESMANAGEMENTNANOTUBESCERAMICS
ISSN
0008-6223
Abstract
Carbon-based fillers for thermal interface materials (TIMs) are attractive due to their advantages such as high thermal conductivity, low thermal expansion, mechanical strength, flexibility, and low weight. In this work, we report a 330% enhancement of the through-plane thermal conductivity (kth) of a graphite-polymer composite TIM film by vertically aligning the graphite fillers with a 10 T superconducting magnet. The filler alignment is based on the large anisotropy in the magnetic susceptibility of graphite platelets. As the filler content increases from 10 to 60 wt%, the anisotropy of thermal conductivity (kth/kin) increases from 1.2 up to 2.3 for a perpendicular magnetic field alignment, whereas it remains the same for a parallel magnetic field alignment. The increased anisotropy is associated with better filler alignment at high filler loadings. This work provides a simple and effective solution to improve the physical properties of composite films by controlling their microstructure. © 2018 Elsevier Ltd
URI
http://hdl.handle.net/20.500.11750/9329
DOI
10.1016/j.carbon.2018.08.029
Publisher
Elsevier Ltd
Related Researcher
Files:
There are no files associated with this item.
Collection:
Division of Nanotechnology1. Journal Articles
Division of Biotechnology1. Journal Articles


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