Polymers are materials with a wide range of properties that are used in many different areas. In addition to synthetic polymers, which are also commonly called plastics, biopolymers, i.e. polymers of natural origin, are increasingly in demand in technical applications. The application properties of products made from these materials can be improved or extended by functionalising the surface. For this important technical process of coating or modifying surfaces, specific strategies and technologies have been developed in recent decades and are widely used in industry. However, there is still considerable potential to utilise the useful properties of these materials in ever new applications. We are developing new materials and technologies for this purpose.