Physical Structure Induced Hydrophobicity Analyzed from Electrospinning and Coating Polyvinyl Butyral Films

Figure 2

SEM images of the PVB films made by spin-coating 250 r/s (a), bar-coating 6 μm (b), positive electrospinning 15 cm (c), and negative electrospinning 15 cm (d). The upper inset images showed the water droplet onto these films, and the lower inset images showed the electrospun fiber diameter distributions.

(a)

(b)

(c)

(d)