AgNWs/MXene增强的柔性多孔压阻传感器的制备与性能研究

Fabrication and performance of AgNWs/MXene enhanced flexible and porous piezoresistive sensor

随着物联网、人工智能等技术的兴起,柔性压阻传感器在人工触觉、健康监测、仿生电子皮肤等领域具有广阔的应用前景.目前柔性压阻传感器的灵敏度和稳定性与实际应用还存在一定的差距.本文中以AgNWs和MXene为导电材料,以具有良好生物兼容性的明胶为聚合物基体,采用冷冻干燥法制备一种多孔蜂窝状的AgNWs-MXene/明胶压阻传感器.测试结果表明所制备的柔性压阻传感器在0~14 kPa压强范围内具有3个线性响应区,在4~9 kPa压强范围内灵敏度最高,为116 kPa^(-1).该传感器的响应时间最快可达1.79 s,且对人体脉搏跳动及肢体的运动状态具有良好的压阻敏感特性,表明实验所制备的柔性压阻传感器在柔性可穿戴电子器件领域具有良好的应用前景.

With the rise of technologies such as the Internet of Things and artificial intelligence,flexible piezoresistive sensors have broad application prospects in the fields of artificial touch,health monitoring,and bionic electronic skin.At present,the sensitivity and stability of flexible piezoresistive sensors and practical applications still exist to some extent gap.In this paper,a porous honeycomb AgNWs-MXene/gelatin piezoresistive sensor was prepared by freeze-drying method using AgNWs and MXene as conductive materials and gelatin with good biocompatibility as polymer matrix.The test results show that the prepared flexible piezoresistive sensor has three linear response zones in the pressure range of 0~14 kPa,and the sensitivity is the highest in the pressure range of 4~9 kPa,which is 116 kPa^(-1).The response time of the sensor is as fast as 1.79 s and it has good piezoresistive sensitivity to the human pulse and the motion state of the limbs,indicating that the flexible piezoresistive sensor prepared in the experiment has a good application prospect in the field of flexible wearable electronic devices.