Multifunctional Self-Healing Dual Network Hydrogels Constructed via Host–Guest Interaction and Dynamic Covalent Bond as Wearable Strain Sensors for Monitoring Human and Organ Motions

• DOI: 10.1021/acsami.1c03213
• Publication Date: 2021-03-17T00:01:27Z
• Authors: Xiong Liu; Zhijun Ren; Fangfei Liu; Li Zhao; Qiangjun Ling; Haibin Gu
• Keywords: Gauge factor; Biocompatibility; Soft Robotics

Hydrogel-based flexible strain sensors have shown great potential in body movement tracking, early disease diagnosis, noninvasive treatment, electronic skins, and soft robotics. The good self-healing, biocompatible, sensitive stretchable properties are the focus of hydrogel-based sensors. Dual network (DN) hydrogels hopeful to fabricate self-healing with above properties. Here, multifunctional DN prepared via a combination host–guest interaction β-cyclodextrin ferrocene dynamic borate ester bonds poly(vinyl alcohol) borax. Carbon nanotubes used endow conductivity. obtained composite possess biocompatibility, stretchability (436%), fracture strength (41.0 KPa), property (healing efficiency 95%), high tensile sensitivity (gauge factor 5.9). as detect different human motions. After cutting, healed also can monitor motions stability. In addition, hydrogel may track respiratory pig lung vitro. This work exhibits new ideas approaches develop for constructing