Surface analysis of different O₂-activated polyurethane-co-silicones using XPS

Abstract Polycarbonate-urethane-co-silicone (PCU-Sil) are gaining increasing interest in biomedical application, such as drug delivery systems, coatings and combination products, due to their adjustable mechanical properties. They can be easily processed using a wide range of methods. Biocompatibility improved by surface modifications, coupling drugs, proteins, antibodies or polymer layers, which extends the applications. To generate additional coupling, first step would generation functional groups on activations, plasma activation. In this context, assignment is important, done XPS measurements. Within study analysis generated after oxygen (O2) activation two PCU-Sils was performed. addition, stability modification evaluated 24 hours. It surprising that were differently stable also different rearranged over time, not have been recognizable if only contact angle measurements used.