Enhanced thermal conductivity of epoxy composites by introducing graphene@boron nitride nanosheets hybrid nanoparticles

Materials & Design

Lihua Zhao¹  Qihan Li²  Xiaolong Huang³  Lichuan Jia³  Qichao Ran³  Junwen Ren³  Lei Yan³  Mingli Fu⁴ 

[1] Corresponding authors.;College of Aviation Engineering, Civil Aviation Flight University of China, Guanghan 618307, China;College of Electrical Engineering, Sichuan University, Chengdu 610065, China;College of Polymer Science and Engineering, State Key Laboratory of Polymer Materials Engineering, Sichuan University, Chengdu 610065, China;

关键词: Composites;    Thermal conductivity;    Boron nitride nanosheets;    Graphene;   

DOI  :  

来源: DOAJ

【 摘 要 】

Polymer composites with high thermal conductivity have promising applications for the thermal management of modern electronic devices. Here, a novel strategy is proposed to enhance the thermal conductivity of epoxy composites by employing a hybrid graphene and boron nitride nanoparticle (GBN). In the GBN, boron nitride nanosheets (BNNSs) tightly adsorb onto the surface of graphene via π-π interactions, and act as bridges for conveying phonons as well as barriers for electrons transporting between adjacent graphene particles. The thermal conductivity and dielectric properties of composites containing GBN are then systematically investigated. The thermal conductivity is significantly enhanced (~140%) in GBN/epoxy composites containing only 5 wt% of GBN. High electrical resistivity (3.05 × 1012 Ω·cm) and low dielectric loss (tanδ < 0.08) are also observed. This study provides important insights into the design and fabrication of highly thermally conductive and electrically insulating composites.

【 授权许可】

Unknown