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Highly Stretchable, Sensitive, and Durable Ag/Tannic Acid@Graphene Oxide-Composite Hydrogel for Wearable Strain Sensors
Chen, Kai1; Wang, Feng1; Hu, Yunping1; Liu, Mingxiang1; Liu, Pei1; Yu, Yongsheng2; Feng, Qian1,3; Xiao, Xiufeng1
2022-03-11
摘要Flexible and wearable strain sensors have received extensive attention in the preparation of human-machine interface equipment, intelligent robots, and personalized health-monitoring biosensors. However, it has been a formidable challenge to develop materials with satisfying stretchability, sharp and quick sensitivity, and good linearity. Herein, we report a multifunctional nanocomposite hydrogel with outstanding stretchability, fatigue resistance, and electrical conductivity by adding Ag nanoparticle-coated graphene oxide (Ag/TA@GO)-based nanocomplexes into a polyacrylamide (PAM) hydrogel matrix. This Ag/TA@GO-PAM nanocomposite hydrogel shows an ultrahigh stretchability of 1250% and excellent conductivity (0.15 S.m(-1)). The sensitivity is improved to GF = 3.1; meanwhile, the preeminent linear sensing property is achieved in the ultrawide strain range of 0 to 1000%, with a high R-2 value of 0.994. Moreover, when the Ag/TA@GO-PAM hydrogel is assembled into a wearable strain sensor with a sandwiched structure, it can detect large and delicate motions (for example, facial expression and pronunciation), with excellent sensitivity and durability. In addition, the nanocomposite hydrogel is further explored from practical aspects for circuit assembly and repair, E-skin of bionic robots, and information encryption. Therefore, this study provides a basis for multifunctional wearable nanocomposite hydrogel sensors.
关键词graphene oxide nanocomposite hydrogel wearable strain sensor electronic skin information encryption
DOI10.1021/acsapm.1c01880
发表期刊ACS APPLIED POLYMER MATERIALS
ISSN2637-6105
卷号4期号:3页码:11
通讯作者Feng, Qian(qianfeng@cqu.edu.cn) ; Xiao, Xiufeng(xfxiao@fjnu.edu.cn)
收录类别SCI
WOS记录号WOS:000771753600001
语种英语