文献类型：期刊文献

英文题名：Achieving a 3D Thermally Conductive while Electrically Insulating Network in Polybenzoxazine with a Novel Hybrid Filler Composed of Boron Nitride and Carbon Nanotubes

作者：Wang, Yi[1];Wu, Wei[1];Drummer, Dietmar[2];Liu, Chao[1];Tomiak, Florian[2];Schneider, Kevin[2];Huang, Zhengqiang[1]

机构：[1]East China Univ Sci & Technol, Sch Mat Sci & Engn, Sino German Joint Res Ctr Adv Mat, Shanghai 200237, Peoples R China;[2]Friedrich Alexander Univ Erlangen Nuremberg, Inst Polymer Technol, D-91058 Erlangen, Germany

年份：2020

卷号：12

期号：10

起止页码：1

外文期刊名：POLYMERS

收录：;EI(收录号：20204309383087);WOS:【SCI-EXPANDED(收录号:WOS:000585519000001)】；

基金：The work was funded by the Chinese German Centre for the Promotion of Science via the National Natural Science Foundation of China (NSFC) and Deutsche Forschungsgemeinschaft (DFG) under grant number GZ1448.

语种：英文

外文关键词：fillers; functionalization of polymers; networks; nanocomposites

摘要：To solve the problem of excessive heat accumulation in the electronic packaging field, a novel series of hybrid filler (BN@CNT) with a hierarchical "line-plane" structure was assembled via a condensation reaction between functional boron nitride(f-BN) and acid treated carbon nanotubes (a-CNTs). The reactions with different mass ratios of BN and CNTs and the effect of the obtained hybrid filler on the composites' thermal conductivity were studied. According to the results, BN@15CNT exhibited better effects on promoting thermal conductivity of polybenzoxazine(PBz) composites which were prepared via ball milling and hot compression. The thermally conductive coefficient value of PBz composites, which were loaded with 25 wt% of BN@15CNT hybrid fillers, reached 0.794 W center dot m(-1)center dot K-1. The coefficient value was improved to 0.865 W center dot m(-1)center dot K-1 with 15 wt% of BN@15CNT and 10 wt% of BN. Although CNTs were adopted, the PBz composites maintained insulation. Dielectric properties and thermal stability of the composites were also studied. In addition, different thermal conduction models were used to manifest the mechanism of BN@CNT hybrid fillers in enhancing thermal conductivity of PBz composites.