Thermal conductivity enhancement of alumina/silicone rubber composites through constructing a thermally conductive 3D framework

被引：40
作者：
Song, Jianan [1 ]
Wu, Lei [1 ]
Zhang, Yong [1 ]
机构：
[1] Shanghai Jiao Tong Univ, Sch Chem & Chem Engn, State Key Lab Met Matrix Composite Mat, Shanghai 200240, Peoples R China
来源：
POLYMER BULLETIN | 2020年 / 77卷 / 04期
基金：
中国国家自然科学基金;
关键词：
Thermal conductivity; Silicone rubber; 3D framework; Foaming and infiltrating; EPOXY COMPOSITES; BORON-NITRIDE; POLYMER COMPOSITES; ELASTOMER COMPOSITES; NETWORK; ALUMINA; NANOPLATELETS; NANOSHEETS; PROPERTY; FILLERS;
D O I：
10.1007/s00289-019-02839-3
中图分类号：
O63 [高分子化学（高聚物）];
学科分类号：
070305 ; 080501 ; 081704 ;
摘要：
Thermally conductive and electrically insulating polymer composites are in great demand for the heat management of modern electronics. Herein, a novel method consisting of the foaming and subsequent infiltrating processes is developed to construct a thermally conductive 3D framework in silicone rubber (SR) for enhancing the thermal conductivity. The thermal conductivity of an alumina (Al2O3)/SR composite with a 3D framework (3D-Al2O3/SR) reaches 0.747 W/(m K) at 32.6 wt% Al2O3 loading, much higher than that of the corresponding Al2O3/SR composite with randomly dispersed Al2O3. This difference can be attributed to the effective thermally conductive 3D network fabricated by foaming and the strong interfacial adhesion between the framework and SR matrix. The volume electrical resistivity of the 3D-Al2O3/SR composite at 32.6 wt% Al2O3 loading is 2.12 x 10(14) omega cm, indicating its good electrical insulation. This method is facile, versatile and of low cost, which could pave the way for designing and preparing high-performance polymer composites used for heat dissipation.
引用
收藏
页码：2139 / 2153
页数：15
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