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. 2021 Feb 13;12(2):195. doi: 10.3390/mi12020195

Figure 2.

Figure 2

Printability of two hybrid bioink formulations using custom-made bioprinter. (a) Representative images of 3D printed 16-layers and 20 × 20 mm square grid pattern for 2A4CNC (2% Alginate and 4% Cellulose Nanocrystals) bioink. Three different air pressures were tested to find optimum pneumatic air pressure. (b) Representative images of 3D printed grid pattern with 4A1CNF (4% Alginate and 1% TEMPO oxidized Cellulose Nanofiber) under three different air pressures. (c) Line thickness printed by extrusion at various air pressures, showing the effect of air pressure on the filament width. (d) Representative images of 2-layers grid pattern after 2 min crosslinking in calcium with an optimum air pressure of 12 PSI for 2A4CNC bioink and (e) optimum air pressure of 20 PSI for 4A1CNF.