This paper reports on the synthesis of polymeric nanomembranes produced by electrospinning. Polyamide-66 (PA-66) was used for studying the influence of fabrication parameters (polymer concentration, applied tension, solution flow rate, gap between needle and target) on the morphology of the nanofibers. Also investigated was the effect from adding graphene into the nanofiber. The average diameter was directly proportional to polymeric concentration, flow rate, and applied tension. The addition of graphene led to an increase in the average diameter, which ranged from 57 nm for the fibers in absence of graphene to 141 nm for a 2 wt. (%) of graphene added. It should be stressed, however, that the average diameters were 37% smaller than the values reported in the literature.