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. 2023 May 31;9(5):765. doi: 10.18063/ijb.765

Figure 3.

Figure 3.

Printability and mechanical properties of hydrogel inks. (A) Photographic images of printing filament and printed structure with different mass ratios of PVA and TA. (B) 2D-printing performance of various shapes with PVA/TA1:1/PAA hydrogel inks through 400-, 200-, and 100-μm diameter nozzles, and SEM images. (C) Printed meshes structures of 2D printing and SEM image. (D) 3D-printed hydrogel by stacked structure. (E) Stress–strain curves of each ratio of printed hydrogel inks. (F) Optical image of the bulk and printed PVA/TA1:1/PAA hydrogel mechanical properties. (G) Stress–strain curves of the bulk and printed PVA/TA1:1/PAA hydrogel ink. (H) Photographs of the self-healing hydrogel. (I) Self-healing efficiency of the hydrogel as a function of healing time (n = 3: n is the sample size). (J) Stress–strain curves of self-healed hydrogel for each time point. (Scale bar: 5 mm for (B), 100 μm for SEM image of (B), 500 μm for (C), 5 mm for (D), 10 mm for (F), and 7 mm for (H)).