Generation and Characterization of an Atmospheric-Pressure Plasma Jet (APPJ) and Its Application in the Surface Modification of Polyethylene Terephthalate

Abstract

An atmospheric-pressure plasma jet (APPJ) has a lot of applications in recent years such as in material processing, surface modification, biomedical material processing, and thin film deposition. APPJ has been generated by a high-voltage power supply (0-20 kV) at an operating frequency of 27 kHz. This paper reports the generation and characterization of APPJ in argon environment and its application in the surface modification of polyethylene terephthalate (PET). The plasma jet has been characterized by electrical and optical methods. In order to characterize the plasma jet, electron density and electron temperature have been determined. The surface roughness of the untreated and plasma-treated PET samples was characterized by contact angle measurement, surface energy analysis, Fourier transform infrared (FTIR) spectroscopy, scanning electron microscopy (SEM), and atomic force microscopy (AFM).

Investigation on Parameters of Atmospheric Pressure Plasma Jet by Electrical and Optical Methods

“…Atmospheric pressure argon plasma jet has been produced and estimated plasma parameters by optical and electrical methods. Electron density (n e ) and electron temperature (T e ) were found to be of the order of 10 14 cm -3 and 10 16 cm -3 [16] using power balance, intensity ratio and stark broadening methods and 0.46 eV and 0.53 eV [10] at applied voltage 3 kV and 4 kV respectively using intensity ratio method. Energy dissipated each cycle of discharge was found to be 3.6 ×10 -4 J, using the Lissajous figures method.…”

“…Therefore, the plasma characterization techniques are important to determine the plasma conditions [9]. In the present experimental setup, three glass tubes are coupled using a nylon coupler which facilitates introducing an additional inlet for gases in the discharge regime without any detriment to the jet formation mechanism [10][11][12].…”

Experimental Studies on Physicochemical Parameters of Water Samples before and after Treatment with a Cold Atmospheric Plasma Jet and its Optical Characterization

“…In this method, four suitable lines (two for Ar I and two for Ar II) were chosen from the spectral lines of argon discharge. e working formula used to calculate the electron temperature is as follows [2,[14][15][16]:…”

“…Atmospheric plasma has been recognized as an important basic tool for promoting various chemical reactions at low temperatures. More specifically, the physical and chemical properties of plasma-treated water are outlined in relation to the acidity, conductivity, redox potential, and concentration of ROS and RNS [2,3]. e simultaneous generation of physicochemical phenomena promotes itself to the top of the promising methods for liquid processing [4].…”

Electrical and Optical Characterization of Gliding Arc Discharge (GAD) Operated at Line Frequency (50 Hz) Power Supply

“…The electron density is an important factor to determine the properties of plasma species. From the electrical method the electron density is calculated following equation [24,25] In our case, cross sectional area of the plasma = 0.48 cm 2 -0.60 cm 2 , discharge voltage = 2.8 kV to 7.5 kV, discharge current = 47 mA to 75 mA, minimum distance between the electrodes = 0.3 cm. The mobility of electron in argon and air is 434 cm 2 V -1 s -1 and 592.1 cm 2 V -1 s -1 respectively [26].…”