A direction-aware and ultrafast self-healing dual network hydrogel for a flexible electronic skin strain sensor
| Autor: | Ting Lu, Min Xu, Guodong Pan, Lu Han, Hailong Huang, Likun Pan, Lijia Wan, Xiaoyang Xuan, Wenwu Peng |
|---|---|
| Rok vydání: | 2020 |
| Předmět: |
Polyethylenimine
Materials science Renewable Energy Sustainability and the Environment technology industry and agriculture Supramolecular chemistry Electronic skin Nanotechnology macromolecular substances 02 engineering and technology General Chemistry Strain sensor 010402 general chemistry 021001 nanoscience & nanotechnology 01 natural sciences Polyvinyl alcohol Artificial skin 0104 chemical sciences chemistry.chemical_compound chemistry Self-healing General Materials Science 0210 nano-technology Ultrashort pulse |
| Zdroj: | Journal of Materials Chemistry A. 8:26109-26118 |
| ISSN: | 2050-7496 2050-7488 |
| Popis: | As an important part of artificial intelligence, electronic skin has received more and more attention recently. However, two serious issues, slow self-healing and lack of direction recognition, have limited the burgeoning of electronic skin largely. Herein, for the first time we report a dual network flexible hydrogel, which was synthesized via cross-linking polyvinyl alcohol (PVA) and polyethylenimine (PEI) with 4-formylbenzoboric acid (Bn) to form a polymer network and then incorporating MXene into the polymer network. Due to the synergy of multiple reversible dynamic covalent bonds and supramolecular interactions, the PVA/Bn/PEI/MXene (PBPM) hydrogel exhibits direction-aware and ultrafast self-healing abilities (self-healing time ∼0.06 s) as well as rapid response performance (signal response time ∼0.12 s). Furthermore, an electronic skin strain sensor assembled by using the PBPM hydrogel can not only efficiently detect the movements in different parts of the prosthetic person body but also specifically identify the directions of the movements including head-down/up and wrist-down/up. The flexible PBPM hydrogel in this work has shown great potential in the applications of artificial skin, soft robots, health monitoring and human-machine exchange interfaces. |
| Databáze: | OpenAIRE |
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