Journal
ACS APPLIED MATERIALS & INTERFACES
Volume 8, Issue 38, Pages 25544-25551Publisher
AMER CHEMICAL SOC
DOI: 10.1021/acsami.6b08279
Keywords
self-healable hydrogel; self-catalysis; dynamic covalent cross-linking thermoresponsive; sol gel transition
Funding
- Scientific Research Foundation for the Returned Overseas Chinese Scholars, State Education Ministry [2014-1685]
- Hebei University [2013-272]
- Postgraduate's Innovational Fund Project of Hebei Province [S2016018]
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The self-healable polymer hydrogel along with reversible temperature responsiveness was prepared through self-catalyzed dynamic acylhydrazone formation and exchange without any additional stimulus or catalyst. The hydrogel was prepared from a copolymer of N-isopropylacrylamide and acylhydrazine P(NIPAM-co-AH) cross-linked by PEO dialdehyde. Besides self-healed under catalysis of acid and aniline, the hydrogel can also self-heal activated by excess of acylhydrazine groups. Without interference of catalyst during the hydrogel formation and self-healing, this kind of hydrogel prepared from biocompatible polymers can be used in more areas including biotechnology and be more persistent. The hydrogel with a large part of the PNIPAM segment also showed temperature responsiveness around body temperature influenced by the variation in group ratio. This self-healable hydrogel has great potential application in areas related to bioscience and biotechnology.
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