Regensburg 2022 – wissenschaftliches Programm
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DY: Fachverband Dynamik und Statistische Physik
DY 20: Complex Fluids and Colloids, Micelles and Vesicles (joint session CPP/DY)
DY 20.3: Vortrag
Dienstag, 6. September 2022, 12:15–12:30, H38
Influence of the imbibition of colloids through the morphology of porous CNF layers — •Constantin Harder1,2, Marie Betker1,3, Alexakis E. Alexakis3, Andrei Chumakov1, Benedikt Sochor1, Elisabeth Erbes1,4, Marc Gensch1,2, Qing Chen1, Calvin Brett1,3, Jan Rubeck1, Matthias Schwartzkopf1, Eva Malmström3, Daniel Söderberg3, Peter Müller-Buschbaum2,5, and Stephan V. Roth1,3 — 1DESY, 22607 Hamburg, Germany — 2TU München, Physik-Department, LS Funktionelle Materialien, 85748 Garching, Germany — 3KTH Royal Institute of Technology, 10044 Stockholm, Sweden — 4Institute for X-ray Physics, Goettingen University, 37077 Goettingen, Germany — 5MLZ, TU München, 85748 Garching, Germany
Functionalization of porous materials in terms of optical, chemical, and mechanical properties is readily achieved by applying colloidal layers. Our goal is to functionalize porous cellulose nanofibril (CNF) templates by applying tailored core-shell colloids with specific surface properties. The colloidal layer formation influencing the surface properties can be tuned by the deposition conditions and subsequent annealing. Therefore, we applied colloidal inks (poly(butyl methacrylate) and poly(sobrerol methacrylate) in aqueous dispersion) with different glass transition temperatures Tg as the colloidal layers on the CNF templates. During the deposition, the colloids partially enter the CNF layer to fill the CNF voids and remain on the CNF surface, leading to complex drying processes. The morphology of the mixed CNF / colloidal thin film changes when Tg of the colloids is exceeded.