Surface Characterization of Asymmetric Bi-Soft Segment Poly(ester urethane urea) Membranes for Blood-Oxygenation Medical Devices

Figure 2

SEM images of PEUU 100 (a, b, and c), where, (a) active layer, (b) bottom surface, (c) cross-section, PEUU 95 (d, e, and f) where, (d) active layer, (e) bottom surface, (f) cross-section, PEUU 90 (g, h, and i) where, (g) active layer, (h) bottom surface, (i) cross-section, PEUU 85 (j, k, and l) where, (j) active layer, (k) bottom surface, (l) cross-section of the membranes.

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