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. Author manuscript; available in PMC: 2020 Nov 18.
Published in final edited form as: Chem Rev. 2020 Aug 20;120(19):10834–10886. doi: 10.1021/acs.chemrev.0c00015

Figure 6.

Figure 6.

(A) Chemical structure of the ABA triblock copolymer. (B) Schematics of the reversible sol-gel transition of the prepared hydrogel under temperature switch. (C) Gelation test of UNONU and NON polymer solutions under cold (4°C) and warm (37°C) conditions via simple tilting. (D) Dynamic strain amplitude cyclic test (γ = 0.5% and 200%) of the hydrogel at 37°C showing rapid self-healing behavior. (E) Frequency-dependent (at a strain of 1%) oscillatory shear rheology of the hydrogel. (F) Viscosity measurement of the hydrogel (inset: injection test of the hydrogel at room temperature). (G) Hydrogels were cut into equal halves by a razor blade. (H) The self-healed hydrogels can also withstand stretching, scale bars: 1 cm. Reprinted with permission from ref141. Copyright 2017 American Chemical Society.