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Your search keyword '"Maletzko, Annabelle"' showing total 2 results
Start Over Author "Maletzko, Annabelle" Topic 3d printing
2 results on '"Maletzko, Annabelle"'

1. New Concept of Electronically and Protonic Conductive Polymer Structures for the Proton Exchange Membrane Water Electrolysis Produced by 3D-Printing

Author

Maletzko, Annabelle, Melke, Julia, Hübner, Christof, and Höhne, Carl-Christoph

Subjects
Functional compounds, 3D printing, PTL Production
Abstract

The polymer electrolyte membrane (PEM) water electrolysis is a promising technology for the production of hydrogen from water using fluctuating renewable electricity sources. However, to achieve widespread application, the investment cost has to be lowered considerably. For optimal two-phase mass transport of gases and water, and to simultaneously ensure electron transfer, a porous transport layer (PTL) is used in PEM systems. Due to the highly oxidative conditions in the oxygen-evolving electrode, PTLs consists of porous titanium, sometimes coated with noble metals to increase corrosion stability. Polymer compounds offer a great potential in terms of cost-efficiency, material properties, which can be easily tailor-made by e.g. polymer additives, and in terms of individual shaping options during the component production in particular by additive manufacturing. However, the conditions in the electrolysis cells are challenging for polymeric materials, in particular for materials used in the oxygen-evolving electrode. Here, we present first steps to a new concept of electronically and protonic conductive polymer structures for the PEM water electrolysis produced by 3D-printing.

Published
2022
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2. FFF 3D Printing of Small Porous Structures from Polymer Compounds Using the Ultimaker 3.

Author

Ernst, Matthias F., Maletzko, Annabelle, Baumann, Sascha, Baumann, Nils, Hübner, Christof, and Höhne, Carl‐Christoph

Subjects
*THREE-dimensional printing, *POLYMER structure, *POROUS polymers, *POLYVINYL alcohol, *POLYLACTIC acid, *MANUFACTURING processes, *CARBON nanotubes
Abstract

Additive manufacturing offers a great potential for the production of objects with a tailor‐made inner structure especially in combination with material development in the field of polymer compounds. However, the design possibilities for the inner structure depend on printing resolution, accuracy, and reproducibility. The quality of small filigree objects printed by additive manufacturing processes for polymer materials like fused filament fabrication (FFF) depends on the polymer material itself as well as on the processing parameters in the additive manufacturing technology used. Here, the production of small porous structures by FFF with an Ultimaker 3 is analyzed using polylactic acid (PLA) as well as polymer compounds of PLA containing carbon nanotubes (CNTs) and polyvinyl alcohol (PVA) containing titanium dioxide (TiO2). The influences of the calibration of the building plate, the heights of the 1st, 2nd, and 3rd layers, and of particulate additives on the printing behavior of the polymer compound, and hence the resulting accuracy of the width of single printed lines, are studied. Additionally, the printing of lattice‐like scaffold structures using PLA/CNT forming the structure and PVA/TiO2 as soluble support structure is described. [ABSTRACT FROM AUTHOR]

Published
2022
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