聚氨酯基压敏材料3D打印结合GaInSn液态金属导线制作柔性压力传感器的研究

Study on the 3D Printing of Flexible Pressure Sensor by Using PolyurethanePressure Sensitive Materials and Encapsulated GaInSn Liquid Metal Wires

随着可穿戴器件的发展,柔性压力传感器作为可穿戴器件的重要组成部分受到广泛的关注。为解决柔性压力传感器的制造工艺复杂与在大变形下接触不良的问题,将多壁碳纳米管(MWNTs)、中间相炭微球(MCMB)和聚氨酯(TPU)进行熔融共混制备柔性压敏3D打印材料,使用熔融沉积3D打印技术将压敏材料与绝缘材料一次打印成型柔性压力传感器,并将GaInSn液态金属封装在传感器内部作为导线。实验表明,GaInSn液态金属与MWNTs/MCMB/TPU压敏材料在大变形下接触良好,可以有效传递信号,制备的柔性压力传感器具有良好的压敏特性。同时,3D打印技术可以为小批量、结构复杂的柔性电子器件的个性化制造提供新的思路。

With the development of wearable devices,flexible pressure sensors have received widespread attention as an important part of wearable devices.In this work,in order to solve the problems of the complex manufacturing process of the flexible pressure sensor and its poor contact under the large deformation,multi-walled carbon nanotubes(MWNTs),mesophase carbon microballs(MCMB)and thermoplastic polyurethane(TPU)were evenly melt blended to prepare flexible pressure sensitive 3D printing materials,pressure sensitive materials and insulating materials were printed into a flexible pressure sensor at one time using melt deposition 3D printing technology,and GaInSn liquid metal was encapsulated in the sensor as a wire.Experiments results show that GaInSn liquid metal and MWNTs/MCMB/TPU pressure sensitive materials are in good contact under large deformation,which can effectively transmit signals,and that the prepared flexible pressure sensor has good pressure sensitive characteristics.At the same time,the 3D printing technology offers a new path for the personalized production of flexible electronics with complex structures in small batches.