Journal
MACROMOLECULAR CHEMISTRY AND PHYSICS
Volume 221, Issue 22, Pages -Publisher
WILEY-V C H VERLAG GMBH
DOI: 10.1002/macp.202000237
Keywords
anti-freezing and water conservation; complex working conditions; hydrogels; interpenetrating networks; self-healing hydrogels
Categories
Funding
- Key RAMP
- D Plan of Shanxi Province [201903D121114]
- Graduate Science and Technology Project of North University of China [20191645]
- Shanxi Scholarship Council of China [2014-6]
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Traditional self-healing hydrogels have great application prospects in biological engineering because of their extremely high water content, but their durability cannot be easily guaranteed. Therefore, developing a rapid self-healing hydrogel with long-lasting water retention capacity is still a significant challenge. A high-strength and fast self-healing hydrogel with an interpenetrating double network based on polyvinyl alcohol/agar-ethylene glycol (PVA/agar-EG) is proposed. Polyvinyl alcohol (PVA) and agar are designed for the construction of the interpenetrating network. Furthermore, the introduction of a borate-bonding dynamic action mode affords the hydrogel with extraordinary mechanical strength and rapid self-healing. The addition of EG as a traveling solvent enables the sample to retain water and prevents freezing in harsh environments, including at high temperatures of 80 degrees C and extremely low temperatures of -40 degrees C. Additionally, owing to the intelligent remolding ability of the PVA/agar-EG hydrogel, the material can be recycled to prolong the service life of the hydrogel. Overall, the PVA/agar-EG hydrogel developed in this study can provide a new general strategy for the development of intelligent self-healing devices, and hydrogels can be applied in complex environmental engineering.
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