Areal homogeneity verification of plasma generated by diffuse coplanar surface barrier discharge in ambient air at atmospheric pressure

Abstract

This paper deals with an optical emission spectroscopy study of a diffuse coplanar surface barrier discharge (DCSBD) in air at atmospheric pressure. The main aim of this study was to verify the areal homogeneity of the generated plasma, which is important for many applications like treatment of nonwoven fabrics, glass, metals, polymers, foils, and so on. Optical emission spectra of DCSBD plasma in air were measured for three different frequencies (15, 30, and 50 kHz) of the applied voltage. Comparison of the calculated rotational and vibrational temperatures was carried out, and areal homogeneity of plasma was proved. Electrical parameters of discharge such as the plasma power using the area of the Lissajous figures and energy transfer efficiency to the discharge were also investigated. The effective thickness of plasma layer as a function of the input power was measured.

Plasma Treatment of Large-Area Polymer Substrates for the Enhanced Adhesion of UV–Digital Printing

“…The plasma was generated by two dielectric barrier discharge versions, DCSBD and half-DCSBD (HDCSBD). The DCSBD generates a macroscopically homogeneous LTP with an input power of 400 W at ~15 kHz [ 23 ]. The active-discharge area is ~8 × 20 cm 2 .…”

“…To date, the DCSBD has been investigated for the surface treatment and functionalization of various polymers [ 11 , 12 , 19 ] and biomaterials [ 20 , 21 ]. Its compact and optimized electrode geometry, together with the optimized supplied voltage parameters (f~15 kHz, U p-p ~20 kV), provides high-power-density, macroscopically homogeneous plasma due to a high presence of diffuse plasma and ensures fast and homogenous surface treatment [ 22 , 23 ]. Moreover, the reliability and scalability of DCSBD plasma operation tested in various gases, humidities, and environments makes this technology especially suitable for industrial-scale in-line material processing.…”

Adhesion improvement on the inner side of LLDPE/PA tubular film exposed to DCSBD roll‐to‐roll plasma system from the outer side of the film

“…The DCSBD produces a plasma layer with an effective thickness of 0.3 mm in ambient air, [ 42 ] and the area of produced nonequilibrium plasma is 8 cm × 20 cm. The square power density of DCSBD fluctuates in the range of 2.5–3.8 W cm − 2 depending on the utilised input power of 400 or 600 W, respectively.…”

Experimental investigation on upstream and downstream discharges in airflows

“…+ and the translational motion of O 2 and N 2 is easily achieved. Therefore, the plasma temperature can be expressed by the rotational temperature of N , 2 + and the emission spectra of N 2 (C 3 Π u →B 3 Π g ) can be used to calculate the rotational temperature by comparing the experimental spectra with the calculated ones [28][29][30]. By using the code in [31,32], the rotational temperature of N 2 is obtained by fitting the measured profile of the emission band (near 337.1 nm) with that of a simulated on, and the rotational temperature in the upstream and downstream discharges under airflow is shown in figure 6.…”