Figure 5.

Wettability and zeta potential of unmodified PLLA scaffold and ECM protein surface functionalized PLLA scaffolds. (a) Representative average contact angle of unmodified PLLA scaffolds and protein functionalized scaffolds. The water contact angle of unmodified and poly L lysine was relatively similar. However, the collagen, gelatin and fibronectin modified fibers show a slightly reduced wettability behavior, possibly due to the inherent nature of individual proteins. (b) The graph represents average zeta potential of unmodified PLLA scaffold and protein functionalized scaffolds. The surface zeta potential of unmodified scaffolds was higher than other samples, with collagen and fibronectin scaffolds showing lowest values.