Treatment by gliding arc of epoxy resin: preliminary analysis of surface modifications

Plasma Surface Modification of Epoxy Polymer in Air DBD and Gliding Arc

“…A comparison was performed for different wavelength range used in the fitting process and results showed only a slight change on the T rot values (see Table S2); however, the most representative temperature values were assumed for the narrow spectral range (305.5 to 310 nm). Additional calculations for the N 2 (C-B) vibrational bands for the ∆ν = −1 resulted in a similar value of T rot = 3508 ± 800 K. All the calculated T rot values are compatible with each other and consistent to those measured in a previous study [35]. Estimation of T vib values is discussed in Supplementary Material and values are also shown in Table S2.…”

“…Additional calculations for the N2(C-B) vibrational bands for the Δν = −1 resulted For the Gliding Arc the OES experiments were carried out along the discharge axis as shown on Figure S1. According to previous results in similar conditions [35], significant variations in the plasma composition and temperatures were clearly observed along the discharge axis. In this study the OES was performed at the 15 mm gap between the electrode base and the sample surface.…”

“…The arc voltage progressively increases until it attains the breakdown voltage value of the starting gap: a new arc appears at the bottom of the reactor, which extinguishes the first arc at the top of the electrodes, so that the Gliding Arc is periodically submitted to the ignition-lengthening-extinction cycle. More details about the source configuration can be found elsewhere [35]. Epoxy samples were placed downstream at a fixed distance of 15 mm from the reactor nozzle so that successive discharges impinge on the surface (direct treatment).…”

“…Although the air DBD plasma treatment has emerged as a promising means of epoxy surface modification, the study of other air-based plasma sources like Gliding Arcs has hardly been explored. In our preliminary work, we studied the surface modification of epoxy resin using Gliding Arc discharges in dry air and we showed the potential for rapid hydrophilization [35]. Herein, we investigate the plasma treatment on epoxy surface with two plasma sources, i.e., a Gliding Arc reactor fed with dry air and a newly designed, ambient-air pulsed DBD.…”

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

“…Plasma diagnostics is crucial for the understanding of the discharge physics which helps to estimate the most fundamental parameters (electron density and electron temperature) in gas discharges [17]. The plasma parameters are strongly dependent upon the type of discharge, nature of working gas, gas pressure, power supply geometrical structure of electrodes, materials of dielectrics etc.…”