Regensburg 2022 – scientific programme

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CPP: Fachverband Chemische Physik und Polymerphysik

CPP 37: Interfaces and Thin Films and Responsive and Adaptive Systems

CPP 37.5: Talk

Thursday, September 8, 2022, 12:00–12:15, H39

Fabrication and Characterization of Hydrophobic Porous Metallic Membranes for High-Temperature Applications — Sara Claramunt¹, •Muhammad Khurram², Walther Benzinger¹, Manfred Kraut¹, and Roland Dittmeyer¹ — ¹Institute for Micro Process Engineering, Karlsruhe Institute of Technology, 76131 Karlsruhe, Germany — ²Institute for Physics, University of Greifswald, 17489 Greifswald, Germany

Hydrophobic porous metallic membranes can be integrated into a microreactor for in-situ separation of steam at high temperatures. This study investigates the fabrication and characterization of hydrophobic coatings on metallic substrates. Two different coating methods were explored: (1) plasma enhanced-chemical vapor deposition to form amorphous carbon silicon-doped a-C:H:Si:O thin films and (2) direct immersion in fluoroalkyl silane (FAS-13) solution using dip coating to form self-assembled monolayers. The results on wettability as well as SEM images and Energy Dispersive Spectroscopy/Wavelength Depressive Spectroscopy analyses indicate that the coated sintered stainless-steel membranes are adequate as hydrophobic surfaces, maintaining the porosity of the substrate and withstanding high temperatures. Especially the FAS-13 coating shows very good resistance to temperatures higher than 250°C. These findings are of special significance for the fabrication of porous metal membranes for the separation of steam in high-temperature applications.