自愈水凝胶
材料科学
电导率
乙二醇
压力传感器
生物相容性
离子键合
离子电导率
可重用性
电解质
化学工程
纳米技术
导电体
复合材料
计算机科学
离子
高分子化学
化学
电极
机械工程
有机化学
物理化学
工程类
软件
冶金
程序设计语言
作者
Yuxiang Qin,Yanxu Chen,Xueshuo Zhang,Anbo Zheng,Qing Xia
出处
期刊:ACS applied electronic materials
[American Chemical Society]
日期:2023-04-18
卷期号:5 (5): 2758-2768
被引量:5
标识
DOI:10.1021/acsaelm.3c00129
摘要
In recent years, hydrogels have become excellent optional materials for flexible sensors due to their high stretchability and biocompatibility. However, the instabilities of hydrogels including the tendency to dry out and the poor reusability seriously limit their applications. Herein, a double-network (DN) organohydrogel is derived by regulating the mechanical property, conductivity, and antidrying characteristic of the poly (acrylamide-co-acrylic acid) (P(AM-co-AA)) hydrogel. Specifically, the ionic coordination (CO2LFeIII) is imported as the secondary cross-link to strengthen the mechanical property, and LiCl in ethylene glycol (EG) solution enhances the conductivity and antidrying characteristics simultaneously. Benefiting from these improvements of material characteristics, the iontronic pressure sensor assembled from the DN organohydrogel demonstrates excellent performances such as a high sensitivity, fast response/recovery characteristic at different frequencies, and remarkable fatigue resistance. These properties also enable physiological signal detections in diverse scenarios. At the same time, with the help of abundant functional groups in the double network and solvent, the organohydrogel exhibits practical NH3 sensing performances including high response, strong gas selectivity, and excellent long-term stability, paving the way toward broader multiscene applications of hydrogels.
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