10:30 AM - 10:45 AM
▼ [9a-Z22-4] PVP Electrospinning Fibers with Ag Nanoparticles Synthesized by Plasma
Keywords:electrospinning, plasma, Ag nanoparticles
AgNPs were synthesized by “Atmospheric-pressure Pulsed Discharge Plasma in a Slug Flow Reactor System”. The gas-liquid slug flow was generated in a capillary glass tube by flowing Ar gas and feed solution alternately. The mixed aqueous solution of 6 mmol/l AgNO3 and 0.1 wt.% starch was used as the feed solution. Through the copper plate attached to the outer surface of the glass capillary tube, an AC 10 kV voltage was transferred into the Ar gas phase to generate plasma in the glass capillary tube. After pulsed discharge plasma treatment, the collected yellow aqueous solution was freeze-dried.
The freeze-dried powder was mixed with a 10 wt.% Polyvinylpyrrolidone (PVP Mw 1,300,000) ethanol solution. This mixture was used as the feed solution for electrospinning. In the electrospinning, a DC power supply was applied to generate electrostatic force with 11.5 kV between the inner φ 0.5 mm nozzle and the collector, with a distance of 9.5 cm. Through a high-pressure syringe pump with setting the flow rate of 0.05 ml/min, the mixture was jet out from the nozzle to the collector. At 300 K and 21% of humidity atmospheric conditions, nanofibers were collected through the electrospinning setup.
TEM images of the electrospun product show that many nanoparticles distributed continuously on the surface of the fiber. Spectra of EDX shows, metallic Ag was evenly detected on the fiber.