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ionic conductive hydrogels toughened by latex particles for strain sensors

Science China(Technological Sciences) 2021年第4期64卷 827-835页

作者： CHANG JingYu ZHANG ZhiXin JIA Fei GAO GuangHui Polymeric and Soft Materials L aboratory School of Chemical Engineering and Advanced Institute of Materials ScienceChangchun University of TechnologyChangchun 130012China

conductive hydrogels have attracted tremendous attention due to their excellent softness and stretchability as wearable strain sensing ***,most of hydrogel-based strain sensors suffered from poor self-recoverability and fatigue resistance,resulting in significant decrease of strain sensitivity after ***,a soft and flexible wearable strain sensor is prepared by using an ionic conductive hydrogel with latex particles as physical cross-linking *** dynamic physical cross-linking structure can effectively dissipate energy through disruption and reconstruction of molecular segments,thereby imparting excellent stretchability,self-recoverability and fatigue *** addition,the hydrogel exhibits excellent strain-sensitive resistance changes,which enables it to be assembled as a wearable sensor to monitor human *** a result,the hydrogel strain sensor can provide precise feedback for a wide range of human activities,including large-scale joint bending and tiny ***,the tough ionic conductive hydrogel would be widely applied in electronic skin,medical monitoring and artificial intelligence.

关键词： ionic conductive hydrogel strain sensor self-recovery fatigue resistance

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Self-sensing magnetic actuators of bilayer hydrogels

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International Journal of Smart and Nano Materials 2023年第4期14卷 496-509页

作者： Shengyuan Zhang Huangsan Wei Jingda Tang State Key Laboratory for Strength and Vibration of Mechanical Structures School of Aerospace EngineeringXian Jiaotong UniversityXi'anChina

Hard magnetic soft robots have been widely used in biomedical *** these applications,it is crucial to sense the movement of soft robots and their interaction with target ***,we propose a strategy to fabricate a self-sensing bilayer actuator by combining magnetic and ionic conductive *** magnetic hydrogel containing NdFeB particles exhibits rapid response to magnetic field and achieve bending ***,the polyacrylamide(PAAm)hydrogel with lithium chloride(LiCl)allows for the sensing of *** bending behavior of the bilayer under magnetic field is well captured by theoretical and simulated ***,the bilayer strain sensor shows good sensitivity,stability and can endure a wide-range cyclic stretching(0-300%).These merits qualify the self-sensing actuator to monitor the motion signals,such as bending of fingers and grasping process of an intelligent *** subject to an external magnetic field,the gripper can grab a cube and sense the resistance change simultaneously to detect the object *** work may provide a versatile strategy to integrate actuating and self-sensing ability in soft robots.

关键词： hard magnetic soft robots bilayer structure ionic conductive hydrogel selfsensing

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