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. Author manuscript; available in PMC: 2022 Mar 1.
Published in final edited form as: Materialia (Oxf). 2020 Nov 17;15:100954. doi: 10.1016/j.mtla.2020.100954

Figure 2.

Figure 2.

(a) Effect of shear rate on the viscosity of alginate (alg, blue line), collagen (col, green line), alg/col 1/0.25 (brown line), alg/col 1/0.5 (red line), and alg/col 1/1 (purple line) hydrogels (b) evolution of storage modulus with time at 37 °C for alginate gel (blue), collagen (green), alg/col 1/0.25 (brown), alg/col 1/0.5 (red), and alg/col 1/1 (purple) hydrogels with 1 mg/mL CaSO4 concentration (c) effect of alginate to collagen weight ratio on the storage modulus of alg/col gels after 900 seconds at 37 °C (d) evolution of storage modulus with time at 37 °C for alg/col 1/0.5 hydrogel with 0 (blue), 0.5 (brown), 1 (red), and 1.5 (green) mg/mL CaSO4 concentration (e) effect of CaSO4 concentration on the storage modulus of alg/col 1/0.5 hydrogel after 900 seconds at 37 °C. (f) effect of precursor solutions storage time on the shear dependent viscosity of the alg/col 1/0.5 hydrogel. The collagen and alginate precursor solutions were stored at 4°C for 0 days (red), 7 days (blue), 14 days (green), or 28 days (brown) and mixed right before the viscosity measurement. “An asterisk” in 2c represents a statistically significant difference between the test group and both alg and col groups. An asterisk in 2e represents a statistically significant difference between the test group and the group without CaSO4. Two asterisks in 2c and 2e represents a statistically significant difference between the test group and all other groups. Error bars in 2c and 2e correspond to means ±1 SD for n = 3.