SKM 2023 – wissenschaftliches Programm
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CPP: Fachverband Chemische Physik und Polymerphysik
CPP 45: Emerging Topics in Chemical and Polymer Physics, New Instruments and Methods
CPP 45.4: Vortrag
Donnerstag, 30. März 2023, 10:15–10:30, ZEU 255
Pair-wise dependences of morphological descriptors provide fingerprint of pore structure in cellulose-based materials — •Karin Zojer1, Matthias Neumann2, Phillip Gräfensteiner2, Eduardo Machado Charry1, Andre Hilger3, Ingo Manke3, Ulrich Hirn4, and Volker Schmidt2 — 1Institute of Solid State Physics,Graz University of Technology, Petersgasse 16, 8010 Graz, Austria — 2Institute of Stochastics, Ulm University, Helmholtzstrasse 18, 89069 Ulm, Germany — 3Institute of Applied Materials, Helmholtz-Zentrum Berlin für Materialien und Energie, Hahn-Meitner-Platz 1, 14109 Berlin, Germany — 4Institute of Bioproducts and Paper Technology, Graz University of Technology, Inffeldgasse 23, 8010 Graz, Austria
Predicting the macroscopic behavior of heterogeneous porous materials from their microscopic structure is formidably challenging, because local morphological microstructure descriptors markedly and erratically vary across a sample. We demonstrate how to quantify cross relationships between pore space-related descriptors and to use these relations to distinguish complex pore spaces at a glance, alike using fingerprints. The key idea is to map the actual microstructure on a multivariate probability distribution. The latter contains strongly compressed information to reproduce the spatial variations of selected properties and their pair-wise interdependencies. Using R-vine copulas, we will exemplarily construct such a distribution of the local morphological descriptors porosity, thickness, surface area per volume and pathway tortuosity for the measured microstructure of paper sheets.