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Open AccessArticle

Effect of VUV Radiation on Surface Modification of Polystyrene Exposed to Atmospheric Pressure Plasma Jet

Department of Surface Engineering, Jozef Stefan Institute, Jamova cesta 39, 1000 Ljubljana, Slovenia
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Polymers 2020, 12(5), 1136; https://doi.org/10.3390/polym12051136
Received: 14 April 2020 / Revised: 5 May 2020 / Accepted: 14 May 2020 / Published: 15 May 2020
(This article belongs to the Special Issue Surface Chemistry of Polymers)
Precise tailoring of surface properties by gaseous plasma treatments remains a key scientific challenge, especially when adequate surface wettability should be laterally distributed, and sharp interfaces between hydrophobic and hydrophilic areas are desirable. The evolution of surface wettability and functional groups on polystyrene (PS) upon treatment with argon plasma jet was monitored by water contact angles and X-ray photoelectron spectroscopy (XPS). An array of water droplets was deposited on PS samples treated either directly by the plasma jet or only VUV radiation arising from the plasma. Rather sharp interfaces between the activated and not-affected regions were observed in both cases. The functionalization with highly-oxidized carbon functional groups, as determined by high-resolution C1s XPS spectra, was by far more efficient using the VUV radiation only. In contrast, the optimal wettability was achieved using direct plasma treatment. The results were explained by different mechanisms involved in the interaction of radiation and reactive plasma species with the polymer surface. View Full-Text
Keywords: atmospheric-pressure plasma jet; VUV interaction; polymer polystyrene; evolution of wettability patterns; evolution of functional groups atmospheric-pressure plasma jet; VUV interaction; polymer polystyrene; evolution of wettability patterns; evolution of functional groups
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MDPI and ACS Style

Zaplotnik, R.; Vesel, A. Effect of VUV Radiation on Surface Modification of Polystyrene Exposed to Atmospheric Pressure Plasma Jet. Polymers 2020, 12, 1136.

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