EG/MWNT/TPU柔性导电3D打印复合耗材的制备及性能  

Fabrication and Performance of EG/MWNTs/TPU Soft Conductive Filaments for 3D Printing

作　　者：李前进 蓝嘉昕 诸葛祥群 刘通 罗志虹 罗鲲 LI Qian-jin;LAN Jia-xin;ZHUGE Xiang-qun;LIU Tong;LUO Zhi-hong;LUO Kun(College of Materials Science and Engineering,Guilin University of Technology,Guilin 541004,China;School of Materials Science and Engineering,Changzhou University,Changzhou 213164,China)

机构地区：[1]桂林理工大学材料科学与工程学院,广西桂林541004 [2]常州大学材料科学与工程学院,江苏常州213164

出　　处：《塑料工业》2019年第9期140-146,共7页China Plastics Industry

基　　金：广西科技重点研发计划项目资助(桂科AB17292017)

摘　　要：导电柔性3D打印材料在可穿戴电子、电子皮肤等领域有重要应用。为提高导电性,在多壁碳纳米管(MWNT)/聚氨酯(TPU)复合材料体系中加入膨胀石墨(EG)。结果表明,EG和MWNT的协同导电作用有效提高了打印耗材导电性能,当添加MWNT质量分数为10%、EG为15%时,复合材料的体积电阻率约为0.23 Ω·cm。扫描电镜(SEM)分析表明,EG在复合体系中起到桥连作用,使MWNT彼此连接形成导电网络,获得了更好的导电特性。选取最优的实验方案,制备了直径1.75 mm的柔性导电耗材,其在3D打印性能良好。Soft conductive three dimensional(3D)printing material was expected to apply in wearable electronics and electronic skin.To enhance the conductivity,expanded graphite(EG)was introduced into the multi-walled carbon nanotubes(MWNTs)/thermoplastic polyurethanes(TPU)composites.The results show that the electrical conductance of the material is obviously improved,due to the synergistic effect of EG and MWNTs.When the mass fraction of MWNTs and EG are 10%and 15%,respectively,the volume resistivity of the composite is measured as 0.23 Ω·cm.Scanning electron microscope(SEM)analysis indicates that the EG is observed to intercalate into the space between MWNTs,and serve to link the conductive network in the TPU matrix,leading to the enhanced conductivity.The soft conductive filament with the diameter of 1.75 mm is fabricated at optimum formula,which performs well in 3D printing process.

关 键 词：聚氨酯 多壁碳纳米管 膨胀石墨 电阻率 

分 类 号：TQ323.8[化学工程—合成树脂塑料工业]