Enhanced through-thickness thermal conductivity of epoxy with cellulose-supported boron nitride nanosheets

被引：14

作者：

Han, Qi ^{[1
]}

Zhang, Jin ^{[2
]}

Wang, Xungai ^{[1
]}

机构：

[1] Deakin Univ, Inst Frontier Mat, Geelong, Vic 3216, Australia

[2] Univ New South Wales, Fac Engn, Sch Mech & Mfg Engn, Sydney, NSW 2052, Australia

来源：

POLYMER | 2019年 / 179卷

关键词：

Nanocomposites; Thermal conductivity; Ionic liquid; Cellulose aerogel; Boron nitride nanosheets; POLYMER COMPOSITES; TEMPERATURE; SIZE; NANOCOMPOSITE; DISSOLUTION; NANOTUBES; AEROGELS; MATRIX;

D O I：

10.1016/j.polymer.2019.121653

中图分类号：

O63 [高分子化学（高聚物）];

学科分类号：

070305 ; 080501 ; 081704 ;

摘要：

Thermal 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.

引用

页数：7

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