文献类型：期刊文献

中文题名：压阻式柔性应变传感器研究进展

英文题名：Research Progress of Piezoresistive Flexible Strain Sensors

作者：张蕾[1];李博[1];高阳[1]

机构：[1]华东理工大学机械与动力工程学院,上海200237

年份：2022

卷号：36

期号：19

起止页码：44

中文期刊名：材料导报

外文期刊名：Materials Reports

收录：CSTPCD;;EI(收录号：20224212902554);Scopus;北大核心:【北大核心2020】；CSCD:【CSCD2021_2022】；

基金：中央高校基本科研业务费专项资金(JKG01211104,JKG01211507)。

语种：中文

中文关键词：柔性应变传感;压阻式;柔性基体;导电填料;传感机制;3D打印

外文关键词：flexible strain sensing;piezoresistive;flexible matrix;conductive filler;sensing mechanism;3D printing

摘要：在信息时代,传感器已渗透到各个领域。压阻式柔性应变传感器因其优良的柔韧性、可拉伸/弯曲性以及在异形物体表面的“随形”贴合性,在智能穿戴、人机交互、结构服役过程监测等领域发挥了重要作用。压阻式柔性应变传感器一般有填充式、夹层式和吸附式三种结构,三种结构在制备复杂程度、重复性及传感性能等方面均有差异。研究者们多采用传统方法实现结构构筑,但传统方法普遍存在操作复杂、成本高、重复性差等问题,而采用新兴的3D打印技术可以高效、高精度、可重复地构筑传感结构,赋予了传感器更大的发展空间。在构筑压阻式柔性应变传感器时需采用柔性基体材料和导电填料,构筑得到的传感器主要有裂纹扩展、导电网络断开和隧穿效应三种传感机制,传感机制的形成与传感器的微观结构和材料有关。另外,压阻式柔性应变传感器的传感性能通常通过灵敏度、传感范围、耐久性等参数来表征,而如何兼具多项优异性能是目前的研究热点。同时,压阻式柔性应变传感器的配套器件和技术是限制其发展的主要因素,尤其是在供电和信号传输方面。本文归纳了压阻式柔性应变传感器在材料选择、结构构筑、机理探索、性能优化、应用开发等方面的研究进展,分析了压阻式柔性应变传感器目前所面临的问题并展望其前景。
In the information age,sensors are already utilized in a variety of fields.Owing to excellent flexibility,stretchability/bendability and conformability on the curved surface of special-shaped objects,the piezoresistive flexible strain sensor plays a vital role in the fields of smart wear,human-computer interaction and structural service process monitoring.Generally,the piezoresistive flexible strain sensors have three different structures,including filling structure,sandwich structure and adsorption structure,which significantly differs in preparation complexity,repeatability,and sensing performance.Traditional preparation methods are usually employed to achieve structural construction.However,the disadvantages are obvious,e.g.complex operation,high cost and poor repeatability.With the rapid development of 3D printing technology,3D printing can be used to prepare strain sensors efficiently,accurately and reproductively,which in turn promotes the development of sensors.Flexible matrix materials and conductive filler are required to prepare piezoresistive flexible strain sensors.Piezoresistive flexible strain sensors typically have three sensing mechanisms:crack propagation,conductive network disconnection and tunneling effect.And it is closely related to the structure and material of piezoresistive flexible strain sensors.Besides,sensing performance of the piezoresistive flexible strain sensor can be characterized by testing the sensitivity,sensing range,durability.However,how to achieve multiple excellent properties at the same time has become a research hotspot.Furthermore,the supporting devices and technologies of piezoresistive flexible strain sensor greatly limit its application,especially in terms of power supply and signal transmission.This review offers a retrospection of the research efforts with respect to the piezoresistive flexible strain sensors,and provides detailed descriptions of material selection,structure construction,mechanism exploration,performance optimization,and application development.Additionally,the current problems faced by piezoresistive flexible strain sensors and development prospects are assessed.