文献类型：期刊文献

英文题名：Forming CNT-guided stereocomplex networks in polylactide-based nanocomposites

作者：Zhang, Dongge[1];Liu, Xing[1];Wu, Guozhang[1]

机构：[1]E China Univ Sci & Technol, Sch Mat Sci & Engn, Shanghai Key Lab Adv Polymer Mat, 130 Meilong Rd, Shanghai 200237, Peoples R China

年份：2016

卷号：128

起止页码：8

外文期刊名：COMPOSITES SCIENCE AND TECHNOLOGY

收录：;EI(收录号：20161202127646);WOS:【SCI-EXPANDED(收录号:WOS:000376712700002)】；

基金：This research was supported by grants from the "973" project (2013CB035505), the National Natural Science Foundation of China (51373053, 20974033), and the Fundamental Research Funds for the Central Universities (WD1113011).

语种：英文

外文关键词：Carbon nanotubes; Polymer-matrix composites (PMCs); Interface; Electrical properties; Mechanical properties

摘要：Grafting a nanoparticle surface using a polymer similar to the matrix has been widely applied to control the spatial organization of nanoparticles. However, the fabrication of target materials with well-defined nanoparticle arrangement remains fundamentally difficult because of the absence of specific interactions between the matrix and the graft. In this study, the self-networking structure of poly(D-lactide)-grafted carbon nanotubes (CNT-g-PDLA) in poly(L-lactide) (PLLA) matrix was investigated. Specific interactions between enantiomeric pairs not only promoted CNT dispersion, but also contributed to the regular phase-separation-like CNT self-networking. Furthermore, the grafted PDLA chains preferably formed stable stereocomplex crystallites with the PLLA matrix, and the CNT self-networking resulted in the self-assembly of 3D continuous stereocomplex scaffold. It was demonstrated that the CNT-guided stereocomplex network endows polylactide-based nanocomposites with significantly improved mechanical strength, heat-resistance, and electrical conductivity at low CNT concentrations. (C) 2016 Elsevier Ltd. All rights reserved.