An anti-freezing wearable strain sensor based on nanoarchitectonics with a highly stretchable, tough, anti-fatigue and fast self-healing composite hydrogel
[Display omitted] The application of conductive hydrogel sensors in wearable devices and electronic skin has aroused great research interest. However, hydrogel sensor cannot simultaneously have good self-healing properties, anti-freezing properties and excellent anti-fatigue properties, which result...
Gespeichert in:
Veröffentlicht in: | Composites. Part A, Applied science and manufacturing Applied science and manufacturing, 2022-09, Vol.160, p.107039, Article 107039 |
---|---|
Hauptverfasser: | , , , , , |
Format: | Artikel |
Sprache: | eng |
Schlagworte: | |
Online-Zugang: | Volltext |
Tags: |
Tag hinzufügen
Keine Tags, Fügen Sie den ersten Tag hinzu!
|
Zusammenfassung: | [Display omitted]
The application of conductive hydrogel sensors in wearable devices and electronic skin has aroused great research interest. However, hydrogel sensor cannot simultaneously have good self-healing properties, anti-freezing properties and excellent anti-fatigue properties, which results in poor reusability and unstable sensing performance. A composite hydrogel was synthesized by one-pot method using polyvinyl alcohol, acrylamide, sodium alginate and glycerol as raw materials. The obtained hydrogel has excellent mechanical properties (0.51 MPa stress, 1500% elongation at break and tensile toughness of 3.6 MJ/m3) and fast self-healing performance with healing efficiency (HE) as high as 92% without any external stimulus. At the same time, glycerol has strong freeze resistance for hydrogels. The hydrogel can stably transmit electrical signals at subzero temperature (−20 °C). In addition, we also verified that the hydrogel could self-recover in a short time through cyclic stretching, indicating the fatigue resistance and rapid recovery of the material. |
---|---|
ISSN: | 1359-835X 1878-5840 |
DOI: | 10.1016/j.compositesa.2022.107039 |