Synthesis and Characterization of Polycaprolactone-Based Polyurethanes for the Fabrication of Elastic Guided Bone Regeneration Membrane

Figure 5

From (a) to (d): SEM images of electrospun membranes made of PCL, PCL-HDI-PEG (1 : 2 : 1), PCL-HDI-PEG (2 : 3 : 1), and PCL-HDI-EDA (2 : 3 : 1) at 200x (left column) and 2000x magnifications (right column).