nnp N95-electrocharged filtration principle based face mask design using common materials Figure 2

Figure 2: Cartoon illustration of the electrspun polymer nanofiber manufacturing mechanism. Molten polymer in a viscous fluid form is forced through an orifice, usually a motorized syringe pump, shown as the EMITTER. A distance apart from the orifice is a metallic plate, we denote as the COLLECTOR. The syringe pump's metallic needle is connected to the positive, and collector is connected the negative terminal of a high voltage source, usually in the order of 10s of kilovolts. As the viscous molten polymer is forced out of the syringe needle, the DC electric field between the emitter and collector forces the droplet to stretch, undergoing extension and cooling simultaneously, and gets deposited as polymer nanofiber (shown as a red spiral in the cartoon illustration) on the collector plate. This fast extending and cooling polymer gets spit out as shown bounded within the blue dashed line in the illustration.