Fig. 3: Mechanical and self-healing properties of the hydrogels. | Communications Materials

Fig. 3: Mechanical and self-healing properties of the hydrogels.

From: Interfacial assembly of self-healing and mechanically stable hydrogels for degradation of organic dyes in water

Fig. 3

a The compressive loading–unloading curves of various hydrogels. b The compressive loading–unloading curves of 5 cycles of DPAS hydrogel. c SEM image showing the layered stacking structure of the DPAS hydrogel in compression. d The typical tensile stress–strain curves of various hydrogels. e The tensile loading–unloading curves of five cycles of DPAS hydrogel. f SEM image showing the microfibril structure of DPAS hydrogel when stretching. g Fracture-recovery test of the hydrogel. h Tensile images and i the corresponding stretch magnification of the hydrogel after cutting and followed by self-healing for 2 h. j Tensile stress–strain curves of the original and healed hydrogel after healing for 2 h. (The hydrogels are expressed as DPA, DPAS, and DPAS@P-GOM gels, where DP, A, S, and GO indicate the hydrogels containing DACO-PDA@Pd NPs, acrylic acid, sodium alginate, and graphene oxide, respectively. For example, DPAS corresponds to the p(DACO-DA@Pd NPs-co-AA-SA) hydrogel.).

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