摘要
柔性传感器在可穿戴设备、植入式器件和电子皮肤等领域具有潜在的应用价值。水凝胶材料的力学性能与生物组织相似,生物相容性好,是应用于仿生柔性传感设备的理想材料之一。水凝胶网络结构是决定其力学性能、导电性能和传感性能的关键。结合本课题组的研究工作,本文主要围绕水凝胶结构与传感性能的关系、水凝胶-组织界面等关键科学问题,系统地阐述了高性能水凝胶柔性传感器的进展,并对其发展趋势进行了展望。
Flexible sensors have potential applications in the fields of wearable devices,implantable devices,and electronic skin,etc.Polymer hydrogels have biomimetic mechanical properties and biocompatibility,and thus are widely recognized as promising candidate materials for biomimetic flexible devices.Conductive hydrogels,including electron conductive and ion conductive hydrogels,have been widely developed as fundamental materials for flexible sensors.The mechanical properties and sensory performance can be conveniently manipulated by designing the network structures of hydrogels to meet the demands of diverse applications.Linear sensitivity,wide working range,linearity,low limit of detection and stability are pursued by designing not only the network structure,but also the device configurations and microstructures.Moreover,the device-tissue interface is critical for implantable applications for monitoring the motions and health of tissues and organs.This review systematically accounts the latest progress in the field of hydrogel sensors including our studies on tough conductive hydrogel sensors,paying special attention to structure-performance relationship,hydrogel-tissue adhesion,and application for human organ motion monitoring.Interpenetrating conductive/hydrophilic networks provide not only high strength and toughness,but also low percolation conductivity,high conductivity and linear sensitivity over a broad working range.Ion conductive hydrogels based on zwitterionic polymers show very high stretchability and ion conductivity,selfhealing,and sensitivity,primarily attributed to the dipole-dipole interaction and ion conduction channels.Such zwitterionic sensors are adhesive to biotissues,and enable real-time monitoring of organ motions.This review aims to inspire new ideas to develop novel high performance hydrogel sensors,shed new insights into mechanisms behind the sensory performances,and boost hydrogel devices toward practical applications.Major challenges and future opportunities in this rapidly developing field are outlooked.
作者
郑静霞
陈国旗
缪玥钥
杨海龙
付俊
ZHENG Jingxia;CHEN Guoqi;MIAO Yueyue;YANG Hailong;FU Jun(Key Laboratory of Polymer Composites and Functional Materials,Ministry of Education,Guangdong Functional Biomaterial Engineering Technology Research Center,Guangzhou Key Laboratory of Flexible Electronic Materials and Wearable Devices,School of Materials Science and Engineering,Sun Yat-sen University,Guangzhou 510006,China)
出处
《功能高分子学报》
CAS
CSCD
北大核心
2022年第4期299-313,I0001,共16页
Journal of Functional Polymers
基金
国家自然科学基金(51873224)。
