Characterization of Gliding Arc Plasma and Study of Its Grafting Effect on the Surface Properties of PVA and MMA
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Abstract
This study constructed a gliding arc plasma generation system operating at atmospheric pressure, using two stainless steel electrodes in an inverted V-shape powered by a high-voltage supply. Argon gas was introduced to generate plasma, and emission spectroscopy was used to analyze plasma parameters at varying gas flow rates. The results showed that higher gas flow rates increased electron temperature and electron density, indicating enhanced plasma ionization. In the second phase, methyl methacrylate (MMA) and polyvinyl alcohol (PVA) surfaces were modified via gliding arc plasma treatment for 5 min. to improve substrate adhesion. Post-treatment analysis was performed using Fourier transform infrared spectroscopy (FTIR) and field-emission scanning electron microscopy (FE-SEM). FE-SEM analysis revealed significant plasma-induced morphological changes, with PVA films developing nanoparticle chains and increased surface roughness at higher flow rates, whereas MMA films exhibited smoother and more homogeneous surfaces due to their hydrophobic nature. FTIR identified key vibrational bands (O-H, C-H, C=O, and C=C in PVA; C-H, C=O, and C-O in MMA), confirming chemical modification following plasma exposure. These findings highlight the potential of gliding arc plasma treatment for polymer surface modification in applications such as biomedical devices, coatings, textiles, and electronics.
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© 2023 The Author(s). Published by the College of Science, University of Baghdad. This is an open-access article distributed under the terms of the Creative Commons Attribution 4.0 International License.
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