Fig. 30.
(a–c) FE-SEM images of PAA fibrous membranes obtained from different solvents: (a) H2O, (b) H2O/ethanol, and (c) ethanol. Reprinted with permission from [32]. © 2011 Royal Society of Chemistry. (d and e) FE-SEM images of gelatin NFN membranes obtained from different solvents: (d) formic acid and (e) acetic acid. Reprinted with permission from [108]. © 2011 Elsevier B.V. (f–k) FE-SEM images of PA-6 fibrous membranes obtained from different solvents: (f) formic acid, (g) Formic acid/dichloromethane, (h) formic acid/acetic acid, (i) formic acid/chlorophenol, (j) chlorophenol and (k) hexafluoroiso propanol. Reprinted with permission from [137]. © 2010 Springer-Verlag.