[1] Forschungszentrum Julich, Inst Energy Res, Leo Brandt Str 1, D-52425 Julich, Germany
[2] Univ Twente, Dept Sci & Technol, NL-7500 AE Enschede, Netherlands
[3] Rhein Westfal TH Aachen, Dept Chem Engn, D-52056 Aachen, Germany
[4] GKSS Forschungszentrum Geesthacht GmbH, Polymer Res Inst, D-21502 Geesthacht, Germany
[5] Hermsdorfer Inst Tech Keram eV, D-07629 Hermsdorf Thuringia, Germany