Biomimetic Hygromorphic Actuator Systems

Abstract:
In this contribution we demonstrate how hygromorphic actuators can be generated based on the biological example of the pinecone. The actuation principle in the technical system is similar to the pinecone as the bending is caused by a hygroscopic layer which takes up water and swells upon rising relative humidities. The technical system, however, bends upon drying rather then swelling. We will also present ideas and first results of cooperative systems which include a second stimulus for swelling and deswelling.