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P: Fachverband Plasmaphysik

P 12: Atmospheric-pressure plasma and applications 3

P 12.1: Hauptvortrag

Mittwoch, 11. März 2020, 11:00–11:30, b305

Surface modification with atmospheric-pressure plasmas - applications and challenges — •Claus-Peter Klages, Lars Bröcker, Andreas Czerny, Stefan Kotula, Meret Leonie Lehner, Andris Martinovs, and Vitaly Raev — Institute for Surface Technology, Technische Universität Braunschweig, Braunschweig, Germany

Since the early 1990, soon after demonstration of stable uniform dielectric-barrier discharges by a group at Sophia University in Tokyo, the number of scientific papers concerning applications of atmospheric-pressure plasmas for surface treatment has been increasing rapidly up to between 150 and 200 per year in the recent decade. In the industry, so-called corona treatment was introduced much earlier - already around 1950 to render polymer surfaces wettable or, in the 1960, to degrease aluminum surfaces. In spite of a long and successful technical history of applications, fundamental mechanisms of the interactions between discharges and organic or inorganic surfaces and products of these interactions are to a large extent still unknown. The lecture will give an account of recent work at Fraunhofer IST or at IOT/TUBS on applications of barrier discharges for treatment of inorganic surfaces such as silicon, silica, aluminum or silver, and on recent studies on the plasma-nitrogenation of polymer surfaces and low-molecular-weight model compounds, utilizing flowing post-discharges as well as single-filament discharges in nitrogen. Results of infrared-spectroscopic investigations of plasma-nitrogenated samples are compared with densities of reactive nitrogen species in the gas phase.