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. 2018 Jul 27;19(8):2198. doi: 10.3390/ijms19082198

Figure 3.

Figure 3

(a) the synthesis scheme of benzaldehyde-terminated four-arm PEG (PEG-BA), and PEG-BA conjugated amino group of CMC to form dynamic hydrogel; (b) schematic illustration of the gelation and self-healing process; (c) macroscopic self-healing process of the hydrogel. Top: the hydrogel strips extruded from syringe and healed to a whole piece and suspended under gravity; bottom: optical microscope images of hydrogels after healing for 0, 1, and 2 h at room temperature. Reprinted with permission [36]. Copyright 2016, Wiley-VCH.