材料科学
丙烯酸
标度系数
乙二醇
溶剂
纳米技术
自愈水凝胶
化学工程
复合材料
高分子化学
共聚物
化学
聚合物
有机化学
制作
医学
替代医学
病理
工程类
作者
Libin Han,Xiaofeng Song,Dongsheng Chen,Rui Qu,Yuze Zhao
出处
期刊:Langmuir
[American Chemical Society]
日期:2023-04-19
卷期号:39 (17): 6151-6159
被引量:1
标识
DOI:10.1021/acs.langmuir.3c00292
摘要
Human-machine interactions, medical monitoring, and flexible robots stimulate interest in hydrogel sensing devices. However, developing hydrogel sensors with multifunctions such as good mechanics, electroconductivity, resistance to solvent volatility as well as freezing, self-adhesion, and independence on external power supply remains a challenge. In the work, a poly(acrylic acid-N-isopropylacrylamide) P(AA-NIPAm) organic hydrogel loading LiCl is prepared by ultraviolet cross-linking in ethylene glycol/H2O. The organic hydrogel exhibits favorable mechanical properties such as an elongation of break at 700% and a breaking strength of 20 KPa, can adhere to various substrates, and resists frost and solvent volatility. Especially, it possesses an excellent conductivity of 8.51 S/m. The organic hydrogel shows wide strain sensitivity based on resistance change, and the gauge factor reaches 5.84 in the range of 300-700%. It has short responsive and recuperative time and is still stable within 1000 rounds. Moreover, the organic hydrogel is also assembled into a self-powered device in which the open-circuit voltage is 0.74 V. The device can transform external stimuli such as stretching or compressing into the output current change, so it detects human motion effectively in real time. The work provides a perspective for electrical sensing engineering.
科研通智能强力驱动
Strongly Powered by AbleSci AI