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. 2021 Dec 20;15:203–213. doi: 10.1016/j.bioactmat.2021.11.036

Fig. 4.

Fig. 4

Adhesive properties of the PDA-PAM/Mg2+ hydrogel. (a) Adhesion effect of the hydrogel on human elbow during exercise. (b) Digital images demonstrating the macroscopic adhesion of the hydrogel to various substrates. (c) Schematic illustration of tensile-adhesion testing and adhesion mechanism of hydrogel on tissue. (d) Adhesive strengths of hydrogels on various substrates (glass, PE, Al, and skin).