Ink storage modulus

What is a good storage modulus for a 3D printed sample?

For example, Chen et al. found that the pumpkin puree-based inks with solid-liquid ratio of 1:1.167 had proper storage modulus (∼20000 Pa) (by frequency sweep, Fig. 2P), showing weak gelation, which was conducive to maintain the 3D printed-samples structure ( Chen, Zhang, Liu, & Bhandari, 2021 ).

How does shear stress affect the storage modulus of sylgard184 ink?

The storage modulus increase with increasing SE1700 content in the hybrid ink, and the and for Newtonian fluid pure Sylgard184 ink are constant. Figure 2 (e) shows the characteristic parameter (equation (2)) as a function of shear stress.

How does extrusion pressure affect edible ink?

The extrusion pressure necessary to extrude tomato paste and other food inks, increased linearly with increasing flow stress; edible ink with tomato puree and vegepate showed a cross-over point of G′ and G″ at around 120 Pa and 500 Pa, and then the G″ of edible ink decreased quickly, indicating the structure of these edible inks were broken.

What psi does ink need?

Despite the high zero-shear viscosity of the ink (92598.5 Pa·s at 0.01 s -1 ), the ink only requires pressures between 12.6 and 15.9 psi to produce flow rates between 0.1 and 6.60 mL/min due to the ink’s highly shear-thinning behavior ( Fig. S5 ).

Is ink extrudable at 2 mL/min?

At 2 mL/min, a predicted maximum shear rate of 1757.9 s -1 is present in the nozzle, which significantly reduces the inks apparent viscosity ( Equation S3 ). Thus, the ink is predicted to be extrudable. In experimentation, all formulations of the ink extruded easily at the flow rates tested. 4.2.3. Step 3: ink classification decision

How does ink formulation affect the rheology of a printed device?

The ink formulation process plays a key role in tuning the rheology and the functional properties of the printed device. In this review, inks formulation, rheological characteristics and device performance are critically discussed, providing insights into the rheology-printability and formulation–functional properties relationships.