Self-Healing Hydrogels with both LCST and UCST through Cross-Linking Induced Thermo-Response
AbstractSelf-healing hydrogels have drawngreat attention in the past decade since the self-healing property is one of the characteristics of living creatures. In this study, poly(acrylamide-stat-diacetone acrylamide) P(AM-stat-DAA) with a pendant ketone group was synthesized from easy accessible monomers, and thermo-responsive self-healing hydrogels were prepared through a series of diacylhydrazide compounds cross-linking without any additional stimulus. Although the copolymers do not show thermo-response, the hydrogels became thermo-responsive andboth the lower critical solution temperature (LCST) and upper critical solution temperature (UCST) varied with the composition of the copolymer and structure of cross-linkers. With a dynamic covalent bond connection, the hydrogel showed gel-sol-gel transition triggered by acidity, redox, and ketone to acylhydrazide group ratios. This is another interesting cross-linking induced thermo-responsive (CIT) hydrogel with different properties compared to PNIPAM-based thermo-responsive hydrogels. The self-healing hydrogel with CIT properties could have great potential for application in areas related to bioscience, life simulation, and temperature switching. View Full-Text
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Zhao, H.; An, H.; Xi, B.; Yang, Y.; Qin, J.; Wang, Y.; He, Y.; Wang, X. Self-Healing Hydrogels with both LCST and UCST through Cross-Linking Induced Thermo-Response. Polymers 2019, 11, 490.
Zhao H, An H, Xi B, Yang Y, Qin J, Wang Y, He Y, Wang X. Self-Healing Hydrogels with both LCST and UCST through Cross-Linking Induced Thermo-Response. Polymers. 2019; 11(3):490.Chicago/Turabian Style
Zhao, Haifeng; An, Heng; Xi, Baozhong; Yang, Yan; Qin, Jianglei; Wang, Yong; He, Yingna; Wang, Xinguo. 2019. "Self-Healing Hydrogels with both LCST and UCST through Cross-Linking Induced Thermo-Response." Polymers 11, no. 3: 490.
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