Computational study of extrusion bioprinting with jammed gelatin microgel-based composite ink

Material extrusion, a filament-based three-dimensional (3D) bioprinting technique, is commonly adopted to fabricate many complex constructs for its high efficiency, compatibility with variety of biomaterials, and easy realization. During extrusion bioprinting, the morphology (including shape size) extruded filaments great interest since are basic building blocks printed 3D structures filament determines printing resolution, surface quality, part mechanical strength. The objective this study computationally analyze performance jammed gelatin microgel-based composite ink during in terms cross-sectional influence yield-stress fluid property on structural printability. As seen from rheological measurements, microgel viscoplastic shear-thinning property, enables it self-supported applications. process has been modeled by using fitted Herschel–Bulkley model simulate behavior first time, resulting good modeling performance. In particular, under different conditions satisfactorily modeled. It found that turns flat rectangular small normalized gap distance (less than 0.6). Furthermore, achievable maximum length (without collapse) ink, deposited both between two supporting substrates over substrate, estimated.