A self-healing and conductive ionic hydrogel based on polysaccharides for flexible sensors  

作　　者：Yufei Wang Zihao Chen Rui Chen Jie Wei 

机构地区：[1]Beijing Engineering Research Center for the Synthesis and Applications of Waterborne Polymers,Beijing 100029,China [2]Key Laboratory of Carbon Fibers and Functional Polymers,Ministry of Education,Beijing 100029,China [3]College of Materials Science and Engineering,Beijing University of Chemical Technology,Beijing 100029,China

出　　处：《Chinese Journal of Chemical Engineering》2023年第1期73-82,共10页中国化学工程学报（英文版）

基　　金：support from National Natural Science Foundation of China(51873009);Beijing Natural Science Foundation(2192042).

摘　　要：In this study,we proposed a self-healing conductive hydrogel based on polysaccharides and Li+to serve as flexible sensors.At first,the oxidized sodium alginate(OSA)was obtained through the oxidation reaction of sodium alginate(SA).Then OSA,carboxymethyl chitosan(CMC),and agarose(AGO)were dissolved in LiCl solution,respectively.Finally,the hydrogel was obtained through heating,mixing,and cooling processes.Because of the Schiff base structure and hydrogen bonding,the hydrogel demonstrates good mechanical and self-healing properties.The presence of Li+provides good conductivity for the hydrogel.In addition,we demonstrated the application of the hydrogel as the flexible sensors.It can perceive the process of pressing Morse code with the index finger as a pressure sensor and monitor sliding movement of the thumb as the strain sensor to browse the web with the mobile phone.Thus,the selfhealing conductive hydrogel may have potential applications in flexible wearable sensors.

关 键 词：HYDROGEL SELF-HEALING Conductivity POLYSACCHARIDE Flexible sensor 

分 类 号：TQ427.26[化学工程] TP212[自动化与计算机技术—检测技术与自动化装置]