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International Journal of Bioprinting Sterilization effect on 3D printed inks

Figure 4. Storage modulus (G’), loss modulus (G”) and loss tangent (tanδ) as a function of frequency for: (A) non-sterilized (CONTROL), (B) UV-
sterilized (UV), (C) filtered (FILT), and (D) autoclaved (AUTO) GEL-SA samples in PBS media.

Figure 5. Storage modulus (G’), loss modulus (G”) and loss tangent (tanδ) as a function of frequency for: (A) non-sterilized (CONTROL), (B) UV-
sterilized (UV), (C) filtered (FILT), and (D) autoclaved (AUTO) GEL-SA samples in water.

[36]
viscous behavior (G” > G’) . Regarding tanδ values, in observed in AUTO and FILT samples. Since dimensional
almost the entire range of frequency studied, tanδ was stability is essential to form the construct when the ink is
lower than 1 for CONTROL and UV samples, indicating a deposited on the 3D printer platform, solid-like behavior is
[47]
solid-like behavior, while fluid-like behavior (tanδ > 1) was required to avoid the collapse of the 3D-printed construct .

Volume 9 Issue 1 (2023) 314 https://doi.org/10.18063/ijb.v9i1.645