Tension‐Responsive Graphene Oxide Conductive Hydrogel with Robust Mechanical Properties and High Sensitivity for Human Motion Monitoring

• Published in: Macromolecular materials and engineering Vol. 308; no. 4
• Main Authors: Sun, Peijie, Li, Qiaoling
• Format: Journal Article
• Language: English
• Published: Weinheim John Wiley & Sons, Inc 01.04.2023; Wiley-VCH
• Subjects: Borax; Boric acid; Carbon; Deformation; Electrical properties; Energy dissipation; Flexible components; Fractures; Graphene; graphene oxide hydrogels; high‐strength; Human motion; Hydrogels; Hydrogen bonds; ionic conductive hydrogels; Iron; Mechanical properties; Monitoring; Nanocomposites; Nanomaterials; Polymers; sensing; Sensors; tension‐responsive hydrogels; Unloading
• ISSN: 1438-7492; 1439-2054
• DOI: 10.1002/mame.202200529

PVA‐BB/GO‐Fe3+/agar hydrogels (BB is configured by 1:1 configuration of 0.04 mol L−1 boric acid solution and 0.04 mol L−1 borax solution) are designed with excellent mechanical and electrical properties due to their triple cross‐linked network, and they maintain stable performance in various tests, which is sufficient to support the use of hydrogels in multiple scenarios. Meanwhile, the tension responsiveness of the PVA‐BB/GO‐Fe3+/agar hydrogel allows it to rapidly transmit signal changes upon tension changes. Finally, maintaining increased energy dissipation and strength enhancement during the loading–unloading cycle provides the possibility of long, stable operation. In summary, it is believed that PVA‐BB/GO‐Fe3+/agar hydrogel has significant potential in the field of flexible sensors and is expected to be fabricated as a sensor for motion monitoring. A PVA‐BB/GO‐Fe3+/agar hydrogel that is capable of strong mechanical properties and high sensitivity at the same time is designed. The stress can be continuously increased during the load–unload cycle. Stable over 1000 cycles, highly responsive and able to monitor movement at different frequencies.