Topologically Enhanced Dual-Network Hydrogels with Rapid Recovery for Low-Hysteresis, Self-Adhesive Epidemic Electronics
| Autor: | Guangyong Zhang, Zelin Liu, Bin Li, Wei Shi, Hang Shi, Zefei Peng, Lan Liu, Ganghui Wei, Song Chen, Hongqiang Mo, Kaiying Luo |
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| Rok vydání: | 2021 |
| Předmět: |
Indoles
Materials science Polymers Polyacrylamide Acrylic Resins Modulus Dual network Biocompatible Materials Nanotechnology 02 engineering and technology 010402 general chemistry 01 natural sciences Polymerization chemistry.chemical_compound Adhesives Elastic Modulus Tensile Strength Humans General Materials Science Electronics Electrical conductor Hydrogels 021001 nanoscience & nanotechnology 0104 chemical sciences Hysteresis chemistry Electrode Self-healing hydrogels 0210 nano-technology |
| Zdroj: | ACS Applied Materials & Interfaces. 13:12531-12540 |
| ISSN: | 1944-8252 1944-8244 |
| DOI: | 10.1021/acsami.1c00819 |
| Popis: | Dual-network conductive hydrogels have drawn wide attention in epidemic electronics such as epidemic sensors and electrodes because of their inherent low Young's modulus, high skin-compliance, and tunable mechanical strength. However, it is still full of challenges to gain a dual-network hydrogel with high stretchability, low hysteresis, and skin-adhesive performance simultaneously. Herein, to address this issue, a novel dual-network hydrogel (denoted as PAa hydrogel) with polyacrylamide as the first network and topologically entangled polydopamine as the secondary network was prepared through a facile gel-phase in situ self-polymerization and soaking treatment. Benefiting from the topological enhancement as well as the synergetic effects of hydrogen bonds and metal coordination bonds, low modulus (∼10 kPa), excellent stretchability (1090.8%), high compression (90%), negligible hysteresis (η = 0.019, energy loss coefficient), rapid recovery in seconds, and self-adhesion are obtained in the PAa hydrogels. To demonstrate their practical use, a states-independent and skin-adhesive epidemic sensor was successfully attached on human skin for motion detection. What is more, by using the hydrogel as an epidemic electrode, electromyogram signals were accurately detected and wirelessly transmitted to a smart phone. This work offers a new insight to understand the strengthening mechanism of dual network hydrogels and a design strategy for both epidemic sensors and electrodes. |
| Databáze: | OpenAIRE |
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