文献类型：期刊文献

英文题名：Polylactide/graphite nanosheets/MWCNTs nanocomposites with enhanced mechanical, thermal and electrical properties

作者：Duan, Jingkuan[1,2,3];Shao, Shuangxi[1];Ya-Li[1];Wang, Linfeng[1];Jiang, Pingkai[2];Liu, Baiping[3]

机构：[1]Ningbo Univ Technol, Inst Mat Engn, Ningbo 315211, Zhejiang, Peoples R China;[2]Shanghai Jiao Tong Univ, Shanghai Key Lab Elect Insulat & Thermal Aging, Shanghai 200240, Peoples R China;[3]E China Univ Sci & Technol, Sch Chem Engn, Shanghai 200237, Peoples R China

年份：2012

卷号：21

期号：2

起止页码：109

外文期刊名：IRANIAN POLYMER JOURNAL

收录：;EI(收录号：20121914995141);WOS:【SCI-EXPANDED(收录号:WOS:000304105300004)】；

基金：The authors gratefully acknowledge the financial support of China Postdoctoral Science Foundation under the grant no. 20100470755, and also thank partly the financial supports of Scientific and Technical Innovation Plan of Undergraduate of Zhejiang Province (2010) (No: NG 18) for this research.

语种：英文

外文关键词：Polylactide; Graphite nanosheets; MWCNTs; Nanocomposites

摘要：In this study, we have prepared a series of novel biodegradable polymer [polylactide (PLA)]-based nanocomposites using graphite nanosheets (GNs) and multi-walled carbon nanotubes (MWCNTs) by solution-blending technique and investigated their morphologies, structures, thermal stabilities, mechanical and dielectric properties, and electrical and thermal conductivities. Before preparation of the PLA/GNs/MWCNTs nanocomposites, the raw GNs used were endured a rapid expansion by thermal treatment. Temperature of this treatment had some obvious impacts on morphological changes of graphite nanosheets which were verified by means of scanning electron microscope (SEM) and X-ray diffraction (XRD) techniques. Resultant nanocomposites were characterized and evaluated by means of SEM, XRD, thermal conductivity measurements, tensile and impact tests, thermogravimetric analysis and dielectric measurements. Results obtained in this study indicated that thermal-expanded GNs in the presence of MWCNTs facilitate the formation of an appropriate conductive network in PLA matrix which resulted in a relatively low percolation threshold for thermal and electrical conductions of PLA/GNs/MWCNTs nanocomposites. Significant improvements in thermal and electrical conductivities, thermal stability and mechanical properties of PLA/GNs/MWCNTs nanocomposites obtained through the presence of both nanoparticles in PLA matrix were associated with their good co-dispersion and co-reinforcement effects. The macroscopic properties of nanocomposites were found to be strongly dependent on their components, concentrations, dispersion, and the resulted morphological structures.