基于多孔碳纳米管-羰基铁粉/硅橡胶复合材料的柔性压容传感器  

Flexible capacitive pressure sensor based on porous carbon nanotube-carbonyl iron particle/silicone composite

作　　者：袁霖 黄承毅 黄培 李元庆[1] 付绍云[1] YUAN Lin;HUANG Chengyi;HUANG Pei;LI Yuanqing;FU Shaoyun(College of Aerospace Engineering,Chongqing University,Chongqing 400044,China)

机构地区：[1]重庆大学航空航天学院,重庆400044

出　　处：《复合材料学报》2024年第9期4740-4751,共12页Acta Materiae Compositae Sinica

基　　金：国家自然科学基金(52173067,12172068)。

摘　　要：柔性压容传感器由于其结构简单、响应速度快、灵敏度高、成本低等优点,在健康监测、机器人、可穿戴设备等领域有非常广泛的应用需求。然而,传统的柔性压容传感器难以兼顾有效应力检测下限和有效应力检测上限,这限制了其在更宽领域范围的应用。本文以糖颗粒(Sugar particles,SPs)为造孔剂,羰基铁粉(Carbonyl iron particles,CIPs)为磁响应填料,碳纳米管(Carbon nanotubes,CNTs)为导电填料,通过与硅橡胶复合制得柔性多孔CNT-CIP/硅橡胶复合材料,并以此为介电层材料制备得到柔性压容传感器,其在0~5 Hz频率范围内的有效应力检测范围为0.07~180 kPa,优于大部分文献报道的柔性压容传感器。由于具有宽的有效应力测试范围,长周期服役稳定性和快速响应,该传感器可用于监测人体呼吸、手臂运动、机械臂运动和语音识别等方面,在健康监测、可穿戴电子设备及智能机器人等领域具有很好的应用前景。Featured by simple structure,fast response,high sensitivity,and low cost,etc.,flexible capacitive pressure sensor has been widely used in the fields of health care,robotics,wearable devices and so on.However,the trade-off between the effective upper and lower detection limits greatly restricts the applications of the flexible capacitive pressure sensor.In this work,a flexible and porous carbon nanotube particles(CNTs)/carbonyl iron particles(CIPs)-silicone composite was produced by using sugar particles(SPs)as the pore-forming agents,CIPs as the magneto-responsive fillers,CNTs as the conductive fillers and silicone rubber as the flexible matrix.After serving as the dielectric layer,the porous CNT-CIP/silicone composite endows the capacitive pressure sensor produced a wide effective detection range of 0.07-180 kPa(at the frequency range of 0-5 Hz),much wider than most capacitive pressure sensors reported.In virtue of the wide detection range,long-term stability and fast response,the sensor produced is capable of monitoring human breath,arm movement,talking,and robotic movement,thus showing great promise in health monitoring,wearable electronic devices,and intelligent robotics,etc.

关 键 词：介电复合材料 多孔结构 磁流变效应 柔性传感器 压容效应 

分 类 号：TB333[一般工业技术—材料科学与工程]