Cholecalciferol as Bioactive Plasticizer of High Molecular Weight Poly(D,L-Lactic Acid) Scaffolds for Bone Regeneration

Abstract

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Extrusion 3D printing of a multiphase collagen‐based material: An optimized strategy to obtain biomimetic scaffolds with high shape fidelity

“…This is further supported by the Carreau‐Yasuda fitting, whose parameter values can be seen in Table 1, and by the parameter k in particular. In fact, the inverse of k gives the shear rate at which a fluid behavior shifts from Newtonian to pseudo‐plastic 43 . In this case, this value equals to 0.03 s −1 , well below the usual shear rates in extrusion printing (Figure 3a).…”

“…In fact, the inverse of k gives the shear rate at which a fluid behavior shifts from Newtonian to pseudo-plastic. 43 In this case, this value equals to 0.03 s À1 , well below the usual shear rates in extrusion printing (Figure 3a).…”

Development of Hydroxyapatite/Polycaprolactone Composite Biomaterials for Laser Powder Bed Fusion: Evaluation of Powder Characteristics, Mechanical Properties and Biocompatibility

“…To obtain the material η 0 , the Carreau–Yasuda model was used to analyze the complex viscosity of PCL and HA/PCL composites as a function of frequency, as it not only describes the Newtonian behavior of the fluid at low shear rates but also captures the shear thinning process at high shear rates. The complex viscosity η of polymers is generally described using the Carreau–Yasuda model [ 70 ]: where η ∞ is the infinite shear viscosity, η 0 is the zero-shear viscosity, λ is the relaxation time, n is the power law index, and a is the width of the transition region between Newtonian and power law behavior. The zero-shear viscosities of virgin PCL, PCL, 5HA/PCL, 10HA/PCL, and 20HA/PCL were determined to be 3304.3 Pa·s, 5522.7 Pa·s, 7817.6 Pa·s, 9092.6 Pa·s, and 8177 Pa·s, respectively (the fitting parameters are presented in Table S2 ).…”