Anti-freezing, Conductive Self-healing Organohydrogels with Stable Strain-Sensitivity at Subzero Temperatures
| Autor: | Lie Chen, Qinfeng Rong, Mingjie Liu, Jiajia Zhou, Wenwei Lei, Yong-ai Yin |
|---|---|
| Rok vydání: | 2017 |
| Předmět: |
Materials science
macromolecular substances 02 engineering and technology Conductivity 010402 general chemistry 01 natural sciences Polyvinyl alcohol Catalysis law.invention chemistry.chemical_compound law Polymer chemistry Molecule Crystallization technology industry and agriculture General Medicine General Chemistry Atmospheric temperature range 021001 nanoscience & nanotechnology 0104 chemical sciences Solvent Chemical engineering chemistry Self-healing hydrogels 0210 nano-technology Ethylene glycol |
| Zdroj: | Angewandte Chemie International Edition. 56:14159-14163 |
| ISSN: | 1433-7851 |
| DOI: | 10.1002/anie.201708614 |
| Popis: | Conductive hydrogels are a class of stretchable conductive materials that are important for various applications. However, water-based conductive hydrogels inevitably lose elasticity and conductivity at subzero temperatures, which severely limits their applications at low temperatures. Herein we report anti-freezing conductive organohydrogels by using an H2O/ethylene glycol binary solvent as dispersion medium. Owing to the freezing tolerance of the binary solvent, our organohydrogels exhibit stable flexibility and strain-sensitivity in the temperature range from −55.0 to 44.6 °C. Meanwhile, the solvent molecules could form hydrogen bonds with polyvinyl alcohol (PVA) chains and induce the crystallization of PVA, greatly improving the mechanical strength of the organohydrogels. Furthermore, the non-covalent crosslinks endow the conductive organohydrogels with intriguing remoldability and self-healing capability, which are important for practical applications. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|
Plný text