Fig. 7From: Colorful Hydrophobic Poly(Vinyl Butyral)/Cationic Dye Fibrous Membranes via a Colored Solution Electrospinning ProcessSchematic representation of the high WCA of NFM due to its rough surface (a), the real water droplet onto electrospun colorful PVB NFM surface (b), and the SEM image of colorful NFM (c), which suggested the dye may wrapped in the fiber as displayed in enlarge image of (a)Back to article page