期刊
CERAMICS INTERNATIONAL
卷 46, 期 6, 页码 7595-7601出版社
ELSEVIER SCI LTD
DOI: 10.1016/j.ceramint.2019.11.259
关键词
Boron nitride; Polystyrene; core-shell structure; Interfacial thermal resistances; Thermal conductivity
资金
- Natural Science Foundation of the Education Department of Liaoning Provincial
- Research Fund for the Doctoral Program of Liaocheng University [318051938]
Hexagonal boron nitride (BN) hold great promise as emerging building blocks for thermal interface materials owing to their outstanding heat transfer performance. Herein, we report a carboxylated polystyrene-coated hydroxylated BN (BN-OH@PS-COOH) nanocomposite with highly thermal conductivity (TC) and extraordinary mechanical properties for thermal management. The exfoliated BN-OH nanosheets were obtained via molten alkali hydroxide pretreatment and sonication. Subsequently, PS-COOH nanospheres were grew on the surface of BN-OH nanosheets by in situ polymerization. Noncovalent interactions between PS-COON and BN-OH are favor to reduce interfacial thermal resistance, which contributes to accelerate heat transport. As a result, the TC of the resultant BN-OH@PS-COOH nanocomposite with 12 wt% BN-OH addition is 1.131 W/mK, which is much higher than that of neat PS (0.186 W/mK) and BN/PS blend nanocomposite (0.312 W/mK). Moreover, the BN-OH@PSCOOH nanocomposite exhibits outstanding mechanical properties. Our study may stimulate novel perspectives on the design of high-performance polymer-based thermal interface materials.
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