DECMAS - Dielectric Elastomer Membranes for Cooperative Micro-Actuator/Sensor Concepts

The DECMAS project is funded by the German Research Foundation (DFG) and is part of the DFG Priority Programme SPP 2206 KOMMMA. Novel, miniaturized and cooperative dielectric actuator concepts are being researched.

The project is a collaboration between the Chair of Intelligent Material Systems headed by Prof. Seelecke from Saarland University (UdS), the Research Group for Adaptive Polymer-based Systems headed by Jun.-Prof. Rizzello from UdS, and the Research Group Sensors and Thin Film Technology headed by Prof. Schultes from Saarland University of Applied Sciences (HTW).

problem

Dielectric elastomers are thin elastomer films that are coated with a flexible electrode on both sides. They combine positive properties such as low weight, low manufacturing costs and energy efficiency. The simultaneous use as a sensor and as an actuator makes this technology particularly appealing. Today's applications are more likely to be found in the macroscopic field. The development towards miniaturized concepts is therefore the goal of this project and at the same time brings with it some challenges.
The interaction and cooperation between neighbouring actuators or sensors based on DE, which are increasingly approaching, has not yet been researched. Furthermore, new design concepts, manufacturing processes, as well as electronics specially adapted to small actuators must be developed. The electrode itself must also be suitable for the miniaturization process.

objective

The aim of the project is to further advance the miniaturization of dielectric actuator concepts and to understand and solve the problems that arise. Starting with the research in the macroscopic area, a gradual reduction of the corresponding components into the millimeter range is sought. At the end of the project, a technology demonstrator is to be created, which shows an array of miniaturized, cooperating DE actuators and sensors.

approach

A total of 3 research groups from HTW (AG Schultes) and UdS (AG Seelecke, AG Rizzello) are working together on the realization of this project. Computer-aided model-based and FEM simulations (AG Rizzello) are used to understand, visualize and optimize the electro-mechanical processes of the DE actuator arrays. Furthermore, the interaction between adjacent array points can be investigated by simulation. The insights gained from this flow into design optimization and the development of solution approaches for possible prototypes. In addition, algorithms for self-sensing and for controlling the actuators are developed in this work package.
In parallel, the working group Seelecke is working on the practical implementation of the DEA array in the second work package. The goal is to develop a functioning overall system in which all aspects such as production, construction, contacting, control, etc. must be coordinated. The insights gained here are directly incorporated into the simulations from the first work package, which in turn allows better predictions to be made for further iterations.
The third work package explores the development of novel metallic extensible electrodes, which still have good electromechanical properties even after several million cycles. Metallic thin films, which are sputtered onto a prestressed silicone film, are the focus of the work. By means of a laser, almost any electrode geometry is to be cut out. The resulting design freedom plays a decisive role in the minaturization and optimization process.

Results / Project status

The three-year project will end in autumn 2022. All three working groups are working in parallel on their work packages. Close coordination and synchronisation of research activities guarantees the greatest possible progress. The first concepts are currently in the implementation phase. Macroscopic demonstrators and arrays are already being manufactured and characterized.

Project management: Sipontina Croce (AG Rizzello); Julian Neu (AG Seelecke); Jonas Hubertus (AG Schultes)
Project management: Jun.-Prof. Dr. Gianluca Rizzello
Duration: 01.10.2019 – 30.09.2022
Funded by: DFG