fig7
![Polyelectrolyte-based conductive hydrogels: from theory to applications](https://image.oaes.cc/7a7c2dd8-fc84-421c-a70d-87456ca10d88/4978.fig.7.jpg)
Figure 7. Adhesion tests of hydrogels. (A) Peeling tests of hydrogels [various lignosulfonate (LS) contents] adhering to pigskin[65]. (B) Adhesion strength of hydrogels (various LS contents) adhering to pigskin[65]. (C) Schematic diagram of hydrogel adhesion to wood, glass, plastic, and stainless steel spoons[65]. (D) Adhesion of the hydrogel to pig skin. Hydrogels adhered to pig skin tissues under bending (i) and torsion (ii). (iii) Two pig skins connected by hydrogel[66]. (A-C) Reproduced with permission[65]. Copyright 2022, Elsevier. (D) Reproduced with permission[66]. Copyright 2020, ACS.