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. 2020 Oct 1;12(10):2261. doi: 10.3390/polym12102261

Figure 14.

Figure 14

Self-healing process after dibenzaldehyde-terminated poly(ethylene glycol (PEG-DA)-based hydrogels were cut and joined. (a) Two disk-shaped original hydrogels, (b) Original hydrogels were cut in 4 pieces and put back together. (c,d) The completed healing of two original hydrogels. (e) Self-healed hydrogel extruded by a needle without clogging. (fh) Illustration of the injection process of the hydrogels. Reprinted with permission from J. Qu et al. [36]. pH-responsive self-healing injectable hydrogel based on N-carboxyethyl chitosan for hepatocellular carcinoma therapy. Copyright © (2017), Acta Biomaterialia Inc. Published by Elsevier. All rights reserved.