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. 2023 Jul 6;15(28):33972–33984. doi: 10.1021/acsami.3c02961

Figure 5.

Figure 5

Oscillatory measurements of all hydrogel samples, tested using frequency and amplitude sweeps. (A) tan δ value, calculated from the ratio between G’ and G″ from the amplitude sweep to observe the viscoelasticity of hydrogels (with and without UV). (B) Storage moduli of hydrogels (with and without UV) obtained from the linear region of amplitude and frequency curves. The error bars indicate the standard deviation of storage modulus for each ink, presented as mean ± SD (n = 10, *p < 0.05, **insignificant). (C–E) Comparison of strain recovery behavior of hydrogels with the complementary network (HAGA10-HAMA15 and HAGA20-HAMA15) and without the complementary network (HAMA15). The strain recovery behavior was measured through seven cycles of strain (1% strain → 800% strain → 1% strain).