期刊
SENSORS AND ACTUATORS B-CHEMICAL
卷 295, 期 -, 页码 159-167出版社
ELSEVIER SCIENCE SA
DOI: 10.1016/j.snb.2019.05.082
关键词
Stretchable hydrogel; Transparent; Self-healing; High sensitivity
资金
- Kuo K. and Cindy F. Wang Professorship
- College of Engineering
- International Postdoctoral Exchange Fellowship Program
- National Natural Science Foundation of China [21604026, 51603075]
- Fundamental Research Funds for the Central Universities [2017BQ069]
- Vice Chancellor for Research and Graduate Education (VCRGE) Office
Wearable sensors have emerged as favored novel devices for human healthcare. Current sensors, however, suffer from low sensitivity, non-transparency, and lack of self-healing ability. In this study, we synthesized a polyvinyl alcohol/cellulose nanofibril (PVA/CNF) hydrogel with dual-crosslinked networks for highly transparent, stretchable, and self-healing pressure and strain sensors. The hydrogel contains dynamic borate bonds, metal-carboxylate coordination bonds, and hydrogen bonds, all of which contribute to the hydrogel's superior dimensional stability, mechanical strength and flexibility, and spontaneous self-healing ability as compared to traditional PVA hydrogels. The developed hydrogel has a moderate modulus of 11.2 kPa, and a high elongation rate of 1900%. It spontaneously self-heals within 15 s upon contact without any external stimuli, has a high transmittance of over 90%, and has excellent compatibility with human fibroblasts. The capacitive sensor developed based on the PVA/CNF hydrogel has high sensitivity to very subtle pressure changes, such as small water droplets. When used as a strain sensor, it was capable of detecting and monitoring various human motions such as finger, knee, elbow, and head movements, breathing, and gentle tapping. The developed hydrogel and sensors not only show great potential in electronic skin, personal healthcare, and wearable devices, but may also inspire the development of transparent, intelligent skin-like sensors.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据