MCMB/MWNT/TPU柔性导电3D打印耗材的制备及压敏特性研究  

Preparation and Force Sensing Properties of MCMB/MWNT/TPU Flexible Conductive 3D Printing Consumables

作　　者：蓝嘉昕 诸葛祥群 刘通 耿继业 罗志虹 罗鲲 汪子林 LAN Jia-xin;ZHU-GE Xiang-qun;LIU Tong;GENG Ji-ye;LUO Zhi-hong;LUO Kun;WANG Zi-lin(College of Materials Science and Engineering,Guilin University of Technology,Guilin 541004,China;College of Materials Science and Engineering,Changzhou University,Changzhou 213164,China;State Ezhou Electric Power Supply Company,Ezhou 436000,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 [3]国网鄂州供电公司,湖北鄂州436000

出　　处：《塑料工业》2020年第5期161-166,共6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：使用热塑性聚氨酯(TPU)、中间相炭微球(MCMB)、多壁碳纳米管(MWNT)制备了一种柔性导电压敏3D打印耗材,验证了耗材的打印效果并研究了两种碳材料添加比例对柔性导电材料力学性能、导电性能的影响。结果表明,加入两种碳材料皆能有效提高材料的导电性,MWNT与MCMB可在TPU基体中共同构建导电网络并互相起协同作用,当MWNT与MCMB添加量均为12%时,材料的电导率达到0. 842 S/cm。为了研究材料的力敏特性,选用含9%MWNT、6%MCMB (型号为9T-6B)的复合材料进行了压力敏感性能实验。结果表明,材料受压力越大其体积电阻值越小,当压力卸载后电阻值发生回弹,说明材料对压力具有一定的敏感性,并且在约400次0~90 N压力循环加载的情况下仍能保持良好的敏感性,所制备的复合材料有望结合3D打印技术制备不同复杂结构的柔性力敏感电子器件。A flexible conductive pressure-sensitive 3 D printing material was prepared by thermoplastic polyurethane( TPU),mesocarbon microbeads( MCMB) and multiwalled carbon nanotube( MWNT). The printing performance of the material was tested,and the effect of the ratio of two carbon materials on the mechanical properties and conductive properties of flexible conductive materials were studied. The results show that the addition of two carbon materials can effectively improve the conductivity of the material,and MWNT and MCMB can jointly build a conductive network in the TPU matrix. When the addition of MWNT and MCMB are both 12%,the electrical conductivity of the material reaches 0. 842 S/cm. In order to study the force-sensitive properties of materials,the composite material containing 9% MWNT and 6% MCMB( type 9T-6B) is selected for pressure-sensitive performance experiments. When the pressure increases, the volume resistance value could decrease. When the pressure is unloaded, the resistance value recovers correspondingly,which indicates that the material has good sensitivity to pressure. When the cyclic loading is 0 ~ 90 N,the good sensitivity of the material can be maintained about 400 cycles. Combining with three dimensional( 3D) printing technology,the asprepared composite material is expected to be applied on various force-sensitive electronic devices with complicated structures.

关 键 词：导电3D打印材料 聚氨酯 多壁碳纳米管 中间相炭微球 压敏特性 

分 类 号：TQ323.8[化学工程—合成树脂塑料工业]