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. Author manuscript; available in PMC: 2016 Nov 24.
Published in final edited form as: Chem Mater. 2015 Oct 27;27(22):7627–7635. doi: 10.1021/acs.chemmater.5b02839

Figure 2.

Figure 2

High extensibility and fast self-healing property of the hydrogel prepared using the pre-coordination method. (a–c) Tensile test of the as-prepared hydrogel sheet. A strain at break of 1000% was achieved in a tensile test. (d–f) Tensile test of the self-healed hydrogel sheet. The hydrogel sheet was cut apart and rejoined for self-healing for 20 minutes before the test. A maximum strain of 800% was achieved before the rupture. Note that the rupture occured not at the self-healed site, indicating the hydrogel completely self-healed within 20 minutes. The hydrogel (1xFe) used in the test was prepared with 14 wt% acrylamide, 0.176% dopamine methacrylamide, 0.038% FeCl3 and 0.5% photo-initiator (LAP).