Fig. 4From: Recent advances of on-demand dissolution of hydrogel dressingsFormation and dissolution of hydrogel based on retro-Michael addition reaction. a Michael addition and retro-Michael reaction. Figure is adapted with permission from the original articles of Konieczynska and Grinstaff [36] (Copyright 2017 by American Chemical Society). b Hydrogel formation using maleimide-functionalized low-molecular weight heparin (MAL-LMWH) and poly(ethylene glycol) (PEG)-thiols; degradation mechanisms for ester and succinimide thioether groups. Figure is adapted with permission from the original articles of Baldwin and Kiick [48] (Copyright 2013 by Royal Society of Chemistry). GSH glutathione, PBS phosphate buffer salineBack to article page