Study of Modified Area of Polymer Samples Exposed to a He Atmospheric Pressure Plasma Jet Using Different Treatment Conditions

Author(s)

Nishime, Thalita M. C. ^{[1, 2]} ; Wagner, Robert ^{[1, 3]} ; Kostov, Konstantin G. ^[2]

Affiliation

^[1] Leibniz Inst Plasma Sci & Technol INP, D-17489 Greifswald, MV - Germany

^[2] Sao Paulo State Univ UNESP, Fac Engn FEG, BR-12516410 Guaratingueta, SP - Brazil

^[3] Kostov, Konstantin G., Sao Paulo State Univ UNESP, Fac Engn FEG, BR-12516410 Guaratingueta, SP, Brazil.Nishime, Thalita M. C., Leibniz Inst Plasma Sci & Technol INP, D-17489 Greifswald, MV - Germany

• Document type: Journal article
• Source: POLYMERS; v. 12, n. 5 MAY 2020.
• Web of Science Citations: 0

Abstract

In the last decade atmospheric pressure plasma jets (APPJs) have been routinely employed for surface processing of polymers due to their capability of generating very reactive chemistry at near-ambient temperature conditions. Usually, the plasma jet modification effect spans over a limited area (typically a few cm(2)), therefore, for industrial applications, where treatment of large and irregular surfaces is needed, jet and/or sample manipulations are required. More specifically, for treating hollow objects, like pipes and containers, the plasma jet must be introduced inside of them. In this case, a normal jet incidence to treated surface is difficult if not impossible to maintain. In this paper, a plasma jet produced at the end of a long flexible plastic tube was used to treat polyethylene terephthalate (PET) samples with different incidence angles and using different process parameters. Decreasing the angle formed between the plasma plume and the substrate leads to increase in the modified area as detected by surface wettability analysis. The same trend was confirmed by the distribution of reactive oxygen species (ROS), expanding on starch-iodine-agar plates, where a greater area was covered when the APPJ was tilted. Additionally, UV-VUV irradiation profiles obtained from the plasma jet spreading on the surface confirms such behavior. (AU)

• FAPESP's process: 15/21989-6 - Development of Cold Atmospheric Pressure Plasma Jets for Material Treatment, Thin Films Deposition and Biomedical Applications
• Grantee: Konstantin Georgiev Kostov
• Support Opportunities: Regular Research Grants