Fig. 4. SEM images of the cotton textile impregnated with Greensilica® particles (SiO2 , amine-SiO2 , diamine-SiO2 and epoxy-SiO2 )(9:1), just after textile impregnation (I) and after 5 washing cycles (II): columns a) and c) without cure, and columns b) and d) with cure.