Figure 9.

Morphological analysis by SEM imaging of PCL scaffolds processed by supercritical CO₂ foaming at 10 MPa. (a–c) At a given soaking time (2 h), increasing the working temperatures induced the formation of larger pores. (d–f) Conversely, for a specific foaming temperature (40 °C), longer soaking times render scaffolds displaying smaller pores with greater pore numbers. Figure reprinted from The Journal of Supercritical Fluids, 117, Chen, C.-X., Liu, Q.-Q., Xin, X., Guan, Y.-X., and Yao, S.-J., Pore formation of poly(ε-caprolactone) scaffolds with melting point reduction in supercritical CO2 foaming, 279–288, 2016, with permission from Elsevier.