Surface Modification of Polymers by Plasma Treatment for Appropriate Adhesion of Coatings

Surface Modification of Polymers by Plasma Treatment for Appropriate Adhesion of Coatings

26 March 2024 | Gregor Primc and Miran Mozetič
This review discusses recent advances in using non-equilibrium gaseous plasma to modify polymer surfaces for improved adhesion of coatings. The study highlights the importance of plasma parameters, such as treatment time, gas pressure, and plasma species flux, in achieving optimal adhesion. Different authors have used various experimental setups, leading to scattered and sometimes contradictory results. The adhesion force between the polymer and coating is influenced by surface wettability, but other factors, such as hydrophobic recovery and interlayer formation, can also affect it. The study emphasizes that improved adhesion is often attributed to changes in surface free energy and wettability, but the relationship between these factors and adhesion is complex. Plasma treatment can enhance wettability by introducing oxygen-containing functional groups and modifying surface morphology. However, prolonged treatment can lead to the formation of loosely bonded molecular fragments, which may reduce adhesion. The study also discusses the effects of different plasma types, such as high-pressure and low-pressure plasmas, on polymer surface properties and adhesion. It concludes that while plasma treatment can significantly improve adhesion, the optimal parameters depend on the specific polymer and application. The study recommends more detailed experimental descriptions and plasma characterization to ensure reproducibility and consistency in results.This review discusses recent advances in using non-equilibrium gaseous plasma to modify polymer surfaces for improved adhesion of coatings. The study highlights the importance of plasma parameters, such as treatment time, gas pressure, and plasma species flux, in achieving optimal adhesion. Different authors have used various experimental setups, leading to scattered and sometimes contradictory results. The adhesion force between the polymer and coating is influenced by surface wettability, but other factors, such as hydrophobic recovery and interlayer formation, can also affect it. The study emphasizes that improved adhesion is often attributed to changes in surface free energy and wettability, but the relationship between these factors and adhesion is complex. Plasma treatment can enhance wettability by introducing oxygen-containing functional groups and modifying surface morphology. However, prolonged treatment can lead to the formation of loosely bonded molecular fragments, which may reduce adhesion. The study also discusses the effects of different plasma types, such as high-pressure and low-pressure plasmas, on polymer surface properties and adhesion. It concludes that while plasma treatment can significantly improve adhesion, the optimal parameters depend on the specific polymer and application. The study recommends more detailed experimental descriptions and plasma characterization to ensure reproducibility and consistency in results.
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[slides and audio] Surface Modification of Polymers by Plasma Treatment for Appropriate Adhesion of Coatings