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

查看全文 作　　者：Xing [1,3,4]Zhou;Jingrui [1]Deng;Changqing [1]Fang;Wanqing [1]Lei;Yonghua [1]Song;Zisen [1]Zhang;Zhigang [2]Huang;Yan [4]Li 高影响力作者 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高影响力机构 出　　处：《Journal of Materials Science & Technology》索引2021年第1期,共8页高影响力期刊 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
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