| 초록 |
Self-healing hydrogels have drawn significant attention because they can respectively result in longer lifespans and highly enhanced mechanical performances than classical hydrogels. Here, a self-healable double network hydrogel was developed using reversible imine formation network between aldehyde groups of oxidized sodium alginate (OSA) and amines of gelatin (GLT) chains as the first and poly(acrylamide) (PAAm) as the second network covalently crosslinked by allyl β-cyclodextin ether (ACE). The self-healable double network hydrogel held its loading energy, unloading energy, and ability to dissipate energy constant despite 10 cycles of compression tests at 80% strain. Besides, the mechanical strength was higher than a double network hydrogel for which N,N′-methylenebisacrylamide (MBA) is used as a second network crosslinker. |
