Fig. 13. (a) Optical images of (I) lignin microPCMs and (V) Ag/lignin microPCMs; SEM images of lignin microPCMs and (II and III) before and (IV) after washing with NaOH; SEM images of Ag/lignin microPCMs before (VI and VII) and (VIII) after washing with NaOH, reproduced with permission from ref. 289. (b) Advancing and receding contact angles, and snapshots taken after the first second of contact between a water droplet and the surface of the mats, Reproduced with permission from ref. 291. (c) Schematic representation of surface composition of composite electrospun lignin/PVA fibers as a function of bulk lignin content, FESEM micrograph of 20 : 80/15% lignin/PVA/CNC fibers. Reprinted with permission from. Reproduced with permission from ref. 292.