Modifikation eines Stahl-Polymer-Interfaces - Untersuchung und Optimierung von Haftungseigenschaften
FacultiesFakultät für Naturwissenschaften
LicenseStandard (Fassung vom 01.10.2008)
In this work laser treatment of stainless steel and the resulting material changes are studied. The irradiation of a stainless steel surfaces with short laser pulses improves the adhesion of polymers and especially of fluorinated polymers. The major goal was to understand the effects that lead to adhesion and to get the knowledge how to generate these effects. Several experiments helped to elucidate the main parameters responsible for polymer adhesion. With a design of experiments the fitting laser parameters for adhesion were found and their values were optimized. A setup for laser conditioning under well defined atmospheres was developed. Chemical changes and changes in surface topography caused by laser treatment were analyzed and compared with relevant adhesion data. A new kind of test was therefor developed to measure adhesion forces. For quantitative material characterization GDOES (Glow Discharge Optical Emission Spectroscopy), XPS (X-Ray Photoelectron Spectroscopy) and AFM (Atomic Force Microscopy) were used. Altogether these experiments contributed to a stepwise approach to a valid model. Finally a model was proposed which describes the direct adhesion between the inorganic steel surface and the organic polymer coating. By performing etching experiments and FTIR (Fourier Transformed Infrared Spectroscopy) measurements this model was proved.
Subject HeadingsAdhäsion [GND]
Metals. Surfaces [LCSH]