München 2019 – wissenschaftliches Programm

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P: Fachverband Plasmaphysik

P 18: Postersitzung

P 18.35: Poster

Donnerstag, 21. März 2019, 16:30–18:30, Foyer Audimax

Investigation of Surface Modifications Caused by Plasma Treatment — •Sandra Moritz1, Janosch J. Perlbach1, Joachim Sann2, Markus Göttlicher2, and Markus H. Thoma11I. Physikalisches Institut, Justus-Liebig University Gießen — 2Physikalisch-Chemisches Institut, Justus-Liebig University Gießen

Inactivation of microorganism by cold atmospheric plasma is one major application in the field of plasma medicine. Therefore, one has to know whether the plasma treatment affects the treated surfaces or not. In this contribution, the effect of cold atmospheric SMD plasma treatment on different surfaces was investigated.

Therefore, the experimental setup was driven for 16 hours with 10 minutes-breaks every 30 minutes. Within the plasma chamber, different material samples (Stainless Steel, UPVC, PP, FEP, glass) were placed. The room temperature was between 18 and 26C, the air humidity between 68 and 96% during the treatments.

Afterwards, 3 samples of every material and configuration were analyzed, using 4 different methods. Firstly, a macroscopic analysis was made which was secondly compared with laser microscopic scans. Thirdly, the contact angles between the samples and reference liquids (water, ethanol, diiodmethane and ethylenglycol) were measured and furthermore, the free surface energy of the samples was determined. Lastly, an XPS-analysis was applied, to investigate the molecular composition of treated and untreated samples.

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