Bio-inspired, Super-stretchable and Self-adhesive Hybrid Hydrogel with SC-PDA/GO-Ca2+/PAM Framework for High Precision Wearable Sensors

Jian Zhou, Fengling Zhou, Xinxin Long, Ying Liu, Haibao Lu, Jikui Luo, Lei Chen, Shurong Dong, Yongqing Fu, Huigao Duan*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

Abstract

Flexible sensors which are highly stretchable, sensitive, and self-adhesive are critically required for wearable electronics, personalized healthcare monitoring and electronic skins. Conductive hydrogel-based sensors hold great promises for this purpose. However, it remains a critical challenge to integrate all the critical functions (e.g., remarkable stretchability, high sensitivity, and self-adhesiveness) into one hydrogel. Here, we propose a bio-inspired hybrid hydrogel framework with a hierarchical configuration that incorporates sodium casein, polydopamine, calcium chloride, and graphene oxide into a polyacrylamide hydrogel. Multiple interpenetrating network architectures and their strong interactions provide superior stretchability of 10,300%, high strain sensitivity with a gauge factor of 13.45 over a broad strain range, robust adhesiveness, fast responsiveness, and excellent reproducibility. This hydrogel-based wearable sensor demonstrates outstanding sensing performance in detecting, quantifying, and remotely monitoring human motions through integration into a cloud platform. A durable glove is further developed using the hybrid hydrogel for wirelessly controlling synchronized motions of a manipulator and accurately recognizing hand gestures. This hybrid hydrogel has shown wide-range applications in fields including wearable electronics, human–machine interfaces, and electronic skins.
Original languageEnglish
Article number137259
Number of pages12
JournalChemical Engineering Journal
Volume447
Early online date2 Jun 2022
DOIs
Publication statusE-pub ahead of print - 2 Jun 2022

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