Casting process for flat membranes

Roll-to-roll production

Using a roll-to-roll process, we can produce flat membranes with thicknesses between 20 and 200 µm and a width of 300 mm. 

During casting, both temperature and atmosphere can be controlled and we have a precipitation bath which allows temperatures between 4 and 90°C. 


Dense, multilayer and mixed-matrix membranes

The main focus of Fraunhofer IGB is the processing of mixed-matrix systems. Using solvent evaporation or phase inversion processes, we can also produce both dense and porous membranes. In addition, we can calender multiple functional layers to form complex systems.

Our developments

Water purification

Forward osmosis membranes for gentle processing of complex mixtures.



Ionomer mixed matrix membranes for electrolysis and fuel cells.

Reference projects

September 2022 - August 2025


Fluorine-free humidifying membrane and innovative membrane winding element for cathode air humidification in PEM fuel cells

A crucial factor for the performance and long-term stability of polymer electrolyte membrane (PEM) fuel cells is the water management in the fuel cell. The (cathode) humidifier plays a central role in this. Within the framework of the project, novel fluorine-free flat membranes in particular are to be developed and validated at the IGB.

August 2017 – December 2020


Highly Integrated Cathode Subsystem: Development and production of a highly integrated air treatment module for use in automotive high-performance PEFCs with production-ready manufacturing technologies to realize automotive performance and cost targets

The management of the water produced played an important role in the performance and lifetime of a fuel cell. Membrane humidifiers can be used for this purpose as an external component to protect the ionomer membrane in the fuel cell from drying out at any time.