Polymer composites with enhanced thermal conductivity via oriented boron nitride and alumina hybrid fillers assisted by 3-D printing

被引：99

作者：

Liu, Mengjing ^{[1
]}

Chiang, Sun-Wai ^{[1
]}

Chu, Xiaodong ^{[1
]}

Li, Jia ^{[1
]}

Gan, Lin ^{[1
]}

He, Yanbing ^{[1
]}

Li, Baohua ^{[1
]}

Kang, Feiyu ^{[1
]}

Du, Hongda ^{[1
]}

机构：

[1] Tsinghua Shenzhen Int Grad Sch, Guangdong Prov Key Lab Thermal Management Engn &, Shenzhen 518055, Peoples R China

来源：

CERAMICS INTERNATIONAL | 2020年 / 46卷 / 13期

关键词：

Thermal conductivity; Hybrid fillers; 3-D printing; Thermal interface resistance; NANOTUBES TERNARY COMPOSITES; MECHANICAL-PROPERTIES; GRAPHENE NANOSHEETS; EPOXY COMPOSITES; ORIENTATION; NETWORK; MICRO; FILMS; BN; NANOCOMPOSITES;

D O I：

10.1016/j.ceramint.2020.05.096

中图分类号：

TQ174 [陶瓷工业]; TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

Herein, oriented boron nitride (BN)/alumina (Al2O3)/polydimethylsiloxane (PDMS) composites were obtained by filler orientation due to the shear-inducing effect via 3-D printing. The oriented BN platelets acted as a rapid highway for heat transfer in the matrix and resulted in a significant increase in the thermal conductivity along the orientation direction. Extra addition of spherical Al2O3 enhanced the fillers networks and resulted in the dramatic growth of slurry viscosity. This, together with filler orientation induced the synergism and provided large increases in the thermal conductivity. A high orientation degree of 90.65% and in-plane thermal conductivity of 3.64 W/(m.K) were realized in the composites with oriented 35 wt% BN and 30 wt% Al2O3 hybrid fillers. We attributed the influence of filler orientation and hybrid fillers on the thermal conductivity to the decrease of thermal interface resistance of composites and proposed possible theoretical models for the thermal conductivity enhancement mechanisms.

引用

页码：20810 / 20818

页数：9

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