Page 65 - Tailoring Electrospinning Techniques for Regenerative Medicine - Marc Simonet

ULTRA-POROUS 3D POLYMER MESHES BY LOW-TEMPERATURE ELECTROSPINNING
Figure 3.3 Side view (cross sections; SEM images) of poly(lactic acid-co-glycolic acid) meshes electrospun at 30% relative humidity and room temperature (a & c) or using a dry ice cooled collection drum (b & d).
Some preferential orientation within the planar collection drum surfaces can still be visible (Figure 3.3d) while a significant portion of the fibers keep the overall mesh structure open by protruding along the z-axis (direction perpendicular to the collection drum
surface). This observation was confirmed for the di erent cross sections of electrospun polyurethane (Figure 3.4) underlining the increasingly more important fiber orientation in the z-direction.
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