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Enhanced through-thickness thermal conductivity of epoxy with cellulose-supported boron nitride nanosheets
journal contribution
posted on 2019-09-01, 00:00 authored by Qi Han, Jin Zhang, Xungai WangThermal management is an important application of nanocomposites. To effectively enhance the through-thickness thermal conductivity, we report a strategy by preparing cellulose-supported boron nitride nanosheets (BNNSs) aerogel and then impregnating with epoxy matrix. Two environmentally friendly approaches, i.e., the urea-NaOH aqueous solution and an ionic liquid 1-butyl-3-methylimidazolium acetate (BmimAc) with dimethyl sulfoxide (DMSO), were investigated to prepare cellulose-supported 3D BNNS network. The nanocomposites prepared by BmimAc-DMSO with supernatant BNNSs showed the highest through-thickness thermal conductivity enhancement, i.e. approximately three times at a low BNNS loading of 8 wt% than the neat epoxy (0.2 W/mK). The structure of cellulose-supported network and BNNS size have shown noticeable effects on thermal conductivity improvement. The infrared thermal images suggest that such epoxy nanocomposites responded more rapidly to heating and cooling.
History
Journal
PolymerVolume
179Article number
121653Pagination
1 - 7Publisher
ElsevierLocation
Amsterdam, The NetherlandsPublisher DOI
ISSN
0032-3861Language
engPublication classification
C Journal article; C1 Refereed article in a scholarly journalUsage metrics
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