Additive manufacturing of CNTs/PLA composites and the correlation between microstructure and functional properties  

作　　者：Xing Zhou Jingrui Deng Changqing Fang Wanqing Lei Yonghua Song Zisen Zhang Zhigang Huang Yan Li 

机构地区：[1]Faculty of Printing,Packaging Engineering and Digital Media Technology,Xi’an University of Technology,Xi’an,710048,China [2]School of Materials Science and Mechanical Engineering,Beijing Technology and Business University,Beijing,100048,China [3]School of Materials Science and Engineering,Xi’an University of Technology,Xi’an,710048,China [4]School of Mechanical and Precision Instrument Engineering,Xi’an University of Technology,Xi’an,710048,China

出　　处：《Journal of Materials Science & Technology》2021年第1期27-34,共8页材料科学技术（英文版）

基　　金：financially supported by the National Natural Science Foundation of China(Nos.51802259 and 51772243);the China Postdoctoral Science Foundation Funded Project(No.2019M663785);the Natural Science Foundation of Shaanxi(No.2019JQ-510);Xi’an and Xi’an Beilin District Programs for Science and Technology Plan(Nos.201805037YD15CG21(18)and GX1913);the Promotion Program for Youth of Shaanxi University Science and Technology Association(No.20190415);the Fund of Key laboratory of Processing and Quality Evaluation Technology of Green Plastics of China National Light Industry Council(No.PQETGP2019003)。

摘　　要：Owing to the facile,low cost,rapid,personalization characters,3D printing method has been one of the most attractive additive manufacturing processes in medicine,airplane,packaging and printing areas.In this work,a series of carbon nanotubes/polylactic acid(CNTs/PLA) composites were prepared through the combination of molten co-extrusion and 3D printing processes.The orientation and dispersion of CNTs in PLA matrix were investigated to explore the impact of 3D printing process on the morphology of CNTs/PLA composites via transmission electron microscopy,field emission scanning electron microscopy and Raman spectroscopy.X-ray diffractometer,differential scanning calorimetry,and thermal gravity analysis were employed to study the crystal structure and thermal properties of the composites.In addition,the electrical conductivity of the prepared specimen revealed that the orientation of CNTs in PLA might enhance the conductivity of the composite.It was found that 3D printing process was beneficial to increasing the purity of CNTs,electrical conductivity and mechanical properties of CNTs/PLA composites.

关 键 词：Carbon nanotubes Microstructure Polymer nanocomposites Thermal stability 

分 类 号：TB332[一般工业技术—材料科学与工程] TP391.73[自动化与计算机技术—计算机应用技术]