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Surface modification of BN/Fe3O4 hybrid particle to enhance interfacial affinity for high thermal conductive material

Authors
Kim, KihoJu, HyunKim, Jooheon
Issue Date
17-May-2016
Publisher
ELSEVIER SCI LTD
Keywords
Polymer-matrix composites; Thermal conductivity; Surface treatments
Citation
POLYMER, v.91, pp 74 - 80
Pages
7
Journal Title
POLYMER
Volume
91
Start Page
74
End Page
80
URI
https://scholarworks.bwise.kr/cau/handle/2019.sw.cau/6937
DOI
10.1016/j.polymer.2016.03.066
ISSN
0032-3861
1873-2291
Abstract
A composite with high thermal conductivity was fabricated using anisotropic boron nitride (BN) and particle alignment techniques. Iron oxide nanoparticles introduced onto the BN surface acted as magnets that gave rise to effective particle alignment. Because of the weak interfacial affinity between filler and matrix, particles chipped during the process and the post-alignment composite had poor morphology. In order to enhance attraction at the interface, the particle surface was modified using a silane coupling agent and poly(tetramethylene glycol). The long carbon chain in the outer polymer layer became entangled with that of the epoxy matrix, resulting in enhancement of interfacial affinity and thermal conductivity. The thermal conductivity of the synthesized composite increased from 0.832 to 1.448 on 20 vol% of filler loading after particle orientation, and increased to 1.577 W/mK after polyol coating. These particle alignment and surface modifications suggest promising applications in the development of thermal interface materials. (C) 2016 Elsevier Ltd. All rights reserved.
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대학원 (지능형에너지산업융합학과)
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