Solvent System Effect on Ace-DEX Scaffolds. Scanning electron micrographs of acetalated dextran 5% (wt/wt) doxorubicin (DXR) (Ace-DEX/5DXR) scaffolds electrospun in a solvent system of hexafluoroisopropanol (HFIP) and butanol with ratios of a) 90:10, b) 80:20, and c) 60:40. d) Picture of 5% wt/wt loaded DXR scaffolds electrospun with HFIP and butanol with ratios of 90:10, 80:20, and 60:40 (from left to right). e) Burst release of DXR from Ace-DEX/5DXR scaffolds electrospun with different HFIP to butanol ratios of 90:10 (black square), 80:20 (gray triangle), and 60:40 (white circle). Data points for all graphs are the mean ± standard error of the mean. Scale bar is the same for all images and represents 5 μm.