Intrinsically adhesive, highly sensitive and temperature tolerant flexible sensors based on double network organohydrogels

被引:96
|
作者
Zhou, Hongwei [1 ]
Lai, Jialiang [1 ]
Jin, Xilang [1 ]
Liu, Hanbin [2 ]
Li, Xusheng [1 ]
Chen, Weixing [1 ]
Ma, Aijie [1 ]
Zhou, Xuechang [3 ]
机构
[1] Xian Technol Univ, Sch Mat & Chem Engn, Shaanxi Key Lab Photoelect Funct Mat & Devices, Xian 710021, Peoples R China
[2] Shaanxi Univ Sci & Technol, Coll Bioresource Chem & Mat Engn, Shaanxi Provincal Key Lab Papermaking Technol & S, Xian 710021, Peoples R China
[3] Shenzhen Univ, Coll Chem & Environm Engn, Shenzhen, Peoples R China
基金
中国国家自然科学基金;
关键词
Intrinsic adhesion; Organohydrogel; Flexible sensor; High sensitivity; Temperature tolerance; HIGH MECHANICAL STRENGTH; HYDROGEL SENSORS; STRAIN SENSORS; TOUGH; TRANSPARENT; GEL; STRATEGY;
D O I
10.1016/j.cej.2020.127544
中图分类号
X [环境科学、安全科学];
学科分类号
08 ; 0830 ;
摘要
Hydrogel-based flexible sensors are of promising applications in various fields, but fabrication of such sensors with integrated high performances remains a challenge. In this work, flexible sensors (both strain sensors and pressure sensors) with integrated high performances are fabricated utilizing double network (DN) organohydrogels. Because of the unique structure of DN organohydrogels, the flexible sensors exhibit intrinsic adhesion without introducing components that are often used to obtain adhesive hydrogels, such as polydopamine, nucleobases or proteins. In addition, outstanding temperature tolerance (-18 to 80 ?C), high stretchability (>2000%), tensile strength (>300 kPa), self-healing ability (96.5%) and transparency (90%) are also achieved. Resistive-type strain sensors of DN organohydrogels achieve high gauge factor (GF = 2.58), low response time (0.18 s), large sensing range (0?1000%) and reversible sensing ability (>1000 cycles). Sandwich-shaped capacitive-type pressure sensors comprising DN organohydrogel electrodes with reliefs exhibit a high sensitivity of 2.14 kPa-1. Such flexible sensors can be applied in monitoring various human motions and subtle physiological activities and further promoted as wireless sensors on the basis of a Bluetooth protocol.
引用
收藏
页数:14
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