fig4

Figure 4. Physical properties of the hydrogels. (A and B) Crystallization and crystallization curves of the hydrogel; (C) Compression curve of hydrogel; (D) Compression strength and compression modulus of the hydrogel; (E and F) Effect of Gly on the water retention and water absorption rates of the hydrogel; (G) Schematic of the semi-interpenetrating network changes of the hydrogel during stretching; (H) Images of the hydrogel’s adhesion to different objects. Data are presented as mean ± SD (n = 3); error bars represent standard deviation. All photos in the figure were taken by the author during the experiment. PG: Polyacrylamide/glycerol; SD: standard deviation; PANI: polyaniline