Novel High Voltage Pulsing to Generate Uniform Glow Discharge Air Plasma for Environment Friendly Inline Treatment of Textile

Abstract

The energy control to the DBD (Dielectric Barrier Discharge) air plasma is proposed which ensure the uniform glow discharge plasma in the air gap. This energy control requires a unique high voltage switching which generates bundles of RF (Radio Frequency) discharge of 0.5 MHz to 2.5 MHz at 6kV but damped oscillations in nature. This damping period ranges from 8us to 10us in repetitive mode. The repetition of switching is limited to 100 kHz to avoid appending of energy in the air gap of DBD to prevent filament generation. The 6kVrms significantly lower voltage than the voltage ratings of conventional pulsed DC supply used in DBD plasma generation at atmospheric pressure. Still, it provides plasma power density of 2W/cm2 which is substantially higher for fast treatment of textile materials such as cotton, polyethylene, polypropylene etc. The functionality measurements results for various materials and the diagnostics of the air DBD plasma are also presented in the paper.