文献类型：期刊文献

英文题名：Achieving a high thermal conductivity for segregated BN/PLA composites via hydrogen bonding regulation through cellulose network

作者：Shen, Wanting[1];Wu, Wei[1];Liu, Chao[1];Wang, Zhengyi[1];Huang, Zhengqiang[1]

机构：[1]East China Univ Sci & Technol, Sino German Joint Res Ctr Adv Mat, Sch Mat Sci & Engn, Shanghai 200237, Peoples R China

年份：2020

卷号：31

期号：9

起止页码：1911

外文期刊名：POLYMERS FOR ADVANCED TECHNOLOGIES

收录：;EI(收录号：20201708569990);WOS:【SCI-EXPANDED(收录号:WOS:000527297700001)】；

基金：The joint research project was funded by the Chinese German Centre for the Promotion of Science via the NSFC and DFG (No. GZ1448).

语种：英文

外文关键词：aggregation; cellulose; segregated structure; thermal conductivity

摘要：Normally, the effective dispersion of thermal conductive fillers is a prerequisite for ensuring thermally conductive networks formed in polymer composites. In this work, a facile method was provided by using cellulose to alter the distribution state of boron nitride (BN) for the preparation of high thermally conductive polylactic acid (PLA). After powder mixing and hot-pressing process, the Cellulose@BN was located at the boundaries of PLA granules to form consecutive thermally conductive networks with more compact structure. Morphology observation and FTIR spectra confirmed that BN edges absorbed on the cellulose surface under the intermolecular hydrogen bond interaction between PLA and BN. At the BN content of 25 wt%, contrasted with traditional BN/PLA segregated polymer composites (SPCs), thermal conductivity coefficient of Cellulose@BN/PLA SPCs improved by 53.5% from 0.71 to 1.09 Wm(-1) K-1. This enhancement could be attributed to the reason that the cellulose regulated stripe aggregation allowed the BN connect with each other more compact, thus a thermal conduction networks with reduced phonon scattering were formed.