Biomedical Engineering Reference
In-Depth Information
Figure 30.3.
SEM photographs of cylindrical scaffold section surfaces
along the longitudinal direction. (a) Alginate, (b) chitosan, and (c) PCL scaf-
folds(
×
100) (Ref.22).
centrifugation.Sincethecentrifugalforceincreaseswiththeincreas-
ing radius of gyration (position dependent) at the same centrifugal
speed, bottom positions of the cylinder (longer radii of gyration)
cause more dense accumulation of the polymer fibrils, resulting
in smaller pore sizes as well as lower porosities, while the top posi-
tions (shorter radii) have larger pore sizes and higher porosities. As
thecentrifugalspeed,3,000rpm,wasappliedtothecylindricalmold
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