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Ultra-Stretchable and Self-Healing Anti-Freezing Strain Sensors Based on Hydrophobic Associated Polyacrylic Acid Hydrogels
| Content Provider | MDPI |
|---|---|
| Author | Yin, Shuya Su, Gehong Chen, Jiajun Peng, Xiaoyan Zhou, Tao |
| Copyright Year | 2021 |
| Description | Water-rich conductive hydrogels with excellent stretchability are promising in strain sensors due to their potential application in flexible electronics. However, the features of being water-rich also limit their working environment. Hydrogels must be frozen at subzero temperatures and dried out under ambient conditions, leading to a loss of mechanical and electric properties. Herein, we prepare $HAG_{x}$ hydrogels (a polyacrylic acid (HAPAA) hydrogel in a binary water–glycerol solution, where x is the mass ratio of water to glycerol), in which the water is replaced with water–glycerol mixed solutions. The as-prepared $HAG_{x}$ hydrogels show great anti-freezing properties at a range of −70 to 25 °C, as well as excellent moisture stability (the weight retention rate was as high as 93% after 14 days). With the increase of glycerol, $HAG_{x}$ hydrogels demonstrate a superior stretchable and self-healing ability, which could even be stretched to more than 6000% without breaking, and had a 100% self-healing efficiency. The $HAG_{x}$ hydrogels had good self-healing ability at subzero temperatures. In addition, $HAG_{x}$ hydrogels also had eye-catching adhesive properties and transparency, which is helpful when used as strain sensors. |
| Starting Page | 6165 |
| e-ISSN | 19961944 |
| DOI | 10.3390/ma14206165 |
| Journal | Materials |
| Issue Number | 20 |
| Volume Number | 14 |
| Language | English |
| Publisher | MDPI |
| Publisher Date | 2021-10-18 |
| Access Restriction | Open |
| Subject Keyword | Materials Industrial Engineering Antifreeze Hydrogels Hydrophobic Associated Polyacrylic Acid Ultra-stretchable Self-healing Sensors |
| Content Type | Text |
| Resource Type | Article |
