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. 2022 Sep 1;15(17):6039. doi: 10.3390/ma15176039

Figure 6.

Figure 6

(Top) Macroscopic images of 3D printed CHI/CNF/Entrapped-cellulase hydrogel scaffolds evolution after printing and further incubation in PBS (pH 7.4) at 37 °C, allowing sustained CNF enzymatic biodegradation, as shown for different times: 5 min, 6 h, 6 d and 21 d. (Middle and Bottom) SEM micrographs of the microstructure of corresponding freeze-dried scaffolds obtained after enzymatic degradation for 21 days (a–f) (scale bars: (a) 3 mm (overview), (b) 200 μm, (c,d) 100 μm, (e,f) 50 μm) and for 14 days (g–j), at different magnifications and filament positions.