Dresden 2026 – wissenschaftliches Programm
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CPP: Fachverband Chemische Physik und Polymerphysik
CPP 6: French-German Session: Membranes and Porous Materials II
CPP 6.4: Vortrag
Montag, 9. März 2026, 12:15–12:30, ZEU/LICH
Two coexisting populations of sorbed DMSO drive distinct structural changes in a swelling porous material — Raimund Teubler1,3, Alexandra Serebrennikova1,2,3, Maximilian Fuchs1,3, Eduardo Machado Charry1, Robert Saf1, Erich Leitner1,3, and •Karin Zojer1,3 — 1Graz University of Technology, Graz, Austria — 2Wood Kplus Competence Center, Linz, Austria — 3CDL for mass transport through paper, Graz, Austria
Understanding the swelling of cellulose-lignin-based fibers is essential for describing the mechanisms governing water and volatile uptake in porous materials such as paper. We reveal the dynamics of dimethyl sulfoxide (DMSO) uptake and quantify the resulting changes in fiber and sheet structure by combining three recently developed techniques based on concentration determination in coupled uptake/release experiments, microcomputed tomography (µ-CT), and optical microscopy. DMSO interacts with the fibers in a manner similar to water. We show that DMSO is incorporated into the paper sheet in two distinct populations, each contributing differently to the structural evolution of the material. The first population consists of DMSO molecules incorporated into the fibers, leading to fiber swelling. The second population accumulates at the fiber surfaces; although these molecules bind to and are released from the surface rapidly, they gradually modify the fiber surface [1]. As a consequence, built-in stresses within the fiber network are released, causing structural changes that persist long after fiber swelling has ceased.
[1] R. Teubler et al., DOI: 10.1007/s10450-025-00656-x.
Keywords: porous fibrous materials; swelling; transport; micro-CT