基于醋酸纤维素/MXene复合纤维膜的柔性触觉传感器  

Flexible tactile sensor based on cellulose acetate/MXene composite fiber thin film

作　　者：梁虎 张礼兵[1] 吴婷[1] 宋海军 汤成莉[1] LIANG Hu;ZHANG Libing;WU Ting;SONG Haijun;TANG Chengli(College of Information Science and Engineering,Jiaxing University,Jiaxing 314001,China;School of Mechanical Engineering and Automation,Zhejiang Sci-Tech University,Hangzhou 310018,China)

机构地区：[1]嘉兴学院信息科学与工程学院,嘉兴314001 [2]浙江理工大学机械与自动控制学院,杭州310018

出　　处：《复合材料学报》2023年第11期6228-6240,共13页Acta Materiae Compositae Sinica

基　　金：国家自然科学基金(61704067);浙江省基础公益研究计划(LGG20E050023);教育部产学合作协同育人项目(220506058211135)。

摘　　要：柔性触觉传感器在电子皮肤、智能机器人、可穿戴电子设备和医疗健康等方面具有广阔的应用潜力。针对压阻型柔性触觉传感器灵敏度低和响应/恢复性能差等问题,提出一种近场电流体动力学直写方法制备基于醋酸纤维素(CA)/MXene多层纳米片复合纤维薄膜的柔性触觉传感器,以具有多孔结构的CA纤维作为桥联剂,将MXene纳米片组装成连续的具有孔隙结构的三维(3D)导电网络。与传统的柔性触觉传感器制备方法相比,该方法通过高压静电场作用有效提高CA/MXene复合纤维薄膜的电学性能,从而提高了柔性触觉传感器的传感性能。测试结果表明:柔性触觉传感器触觉压力感知范围为9 Pa~10.2 kPa,在9 Pa~5.6 kPa压力范围内,该传感器的灵敏度为17.36 kPa^(-1),并且具有快速的响应/恢复性能(60.31/74.35 ms)。实验结果表明该柔性触觉传感器能够识别手指的运动状态、呼吸状态和脉搏等信号,在人体运动检测和生理信号监测等方面具有广阔的应用前景。Flexible tactile sensors have broad application potential in electronic skin,intelligent robots,wearable electronic devices,and medical health.To solve the problems of low sensitivity and poor response/recovery performance of piezoresistive flexible tactile sensor,a near-field electrohydrodynamic direct-writing method was proposed to fabricate flexible tactile sensor based on cellulose acetate(CA)/MXene multilayer nano sheet composite fiber thin film,in which MXene nano sheets were assembled into a continuous three-dimensional(3D)conductive network with porous structure using cellulose acetate fiber with porous structure as a bridge agent.Compared with the traditional fabrication method of flexible tactile sensor,this method effectively improved the electrical performance of CA/MXene composite fiber thin film through the action of high-voltage electrostatic field,which improved the sensing performance of flexible tactile sensor.The test results show that the flexible tactile pressure sensing range of the flexible tactile sensor is 9 Pa-10.2 kPa.Within the pressure range of 9 Pa-5.6 kPa,the sensitivity of the sensor is 17.36 kPa^(-1),and it has fast response/recovery performance(60.31/74.35 ms).The experimental results show that the fabricated flexible tactile sensor can recognize the changes of finger motion state,respiration state,and pulse signal,which has broad application prospects in human motion detection and physiological signal monitoring.

关 键 词：柔性触觉传感器 醋酸纤维素 MXene 三维多孔导电网络 近场电流体动力学直写 

分 类 号：TB332[一般工业技术—材料科学与工程]