文献类型：期刊文献

英文题名：Bridging boron nitride nanosheets with oriented carbon nanotubes by electrospinning for the fabrication of thermal conductivity enhanced flexible nanocomposites

作者：Yang, Liu[1];Zhang, Ling[1];Li, Chunzhong[1]

机构：[1]East China Univ Sci & Technol, Shanghai Engn Res Ctr Hierarch Nanomat, Sch Mat Sci & Engn, Key Lab Ultrafine Mat,Minist Educ, Shanghai 200237, Peoples R China

年份：2020

卷号：200

外文期刊名：COMPOSITES SCIENCE AND TECHNOLOGY

收录：;EI(收录号：20203609129864);WOS:【SCI-EXPANDED(收录号:WOS:000580920800044)】；

基金：This work was supported by This work was supported by the National Natural Science Foundation of China (51673063, 21878092, 21838003, 91834301 and 51621002), the Shanghai Scientific and Technological Innovation Project (18JC1410500, 19JC1410400), Program of Shanghai Academic Research Leader (19XD1401400), the Innovation Program of Shanghai Municipal Education Commission, the Fundamental Research Funds for the Central Universities (222201718002).

语种：英文

外文关键词：Hybrid composites; Carbon nanotubes; Thermal properties; Electrospinning

摘要：With the rapidly growing power density of integrated circuits in modern electronic devices, how to construct efficient thermal conductive network achieving advanced heat conduction materials has attracted widespread attention. In this work, at an extremely low content of carbon nanotubes (CNTs), a synergistic hybrid structure of bridged boron nitride nanosheets (BNNSs) by CNTs was constructed along the polyvinyl alcohol (PVA) fibers by electrospinning, and simply resin transfer molding method was employed to produce Epoxy/PVA (BNNSs/CNTs) composite film. Fabricated Epoxy/PVA (BNNSs/CNTs) composite film not only presented great in-plane thermal conductivity (TC) 6.3 W/m.K at total filler loading of 27.5 wt%, higher than that of Epoxy/PVA (BNNSs) composite film without CNTs by 88%, but also exhibited excellent electrical insulating properties (6 x 10(-13) S/cm). During the heating and cooling test, infrared thermal images showed that the synergistic hybrid composite has the highest surface temperature and the best heat dissipation capacity compared to other samples. The great TC enhancement is due to the bridging BNNSs by CNTs reducing interfacial thermal resistance between neigh-boring fillers. Additionally, good mechanical properties and stable TC provide more immense potential for the wide application of new generated flexible thermal management materials.