Berlin 2024 – wissenschaftliches Programm
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CPP: Fachverband Chemische Physik und Polymerphysik
CPP 15: Poster I
CPP 15.11: Poster
Montag, 18. März 2024, 18:00–20:00, Poster C
Water-based lignin colloidal particle and cellulose nanofibrils hybrid films with UV-block ability by spray deposition — •Shouzheng Chen1,2, Constantin Harder1,3, Iuliana Ribca4, Yusuf Bulut1,3, Peter Müller-Buschbaum3,5, Mats Johansson4, Julien Navarro2, and Stephan Roth1,4 — 1Deutsches Elektronen-Synchrotron DESY, Notkestraße 85, 22607 Hamburg, Germany — 2Institute of Wood Science, Universität Hamburg, 20146 Hamburg, Germany — 3Physik-Department, Lehrstuhl für Funktionelle Materielien, Technische Universität München, James-Franck-Strasse 1, 85748 Garching, Germany — 4KTH Royal Institute of Technology, Department of Fibre and Polymer Technology, 10044 Stockholm, Sweden — 5Technische Universität München, Heinz Maier-Leibnitz Zentrum (MLZ), Lichtenbergstr. 1, 85748 Garching, Germany
Cellulose nanofibrils(CNFs) have hydrophilic interfaces and establish self-entangled networks, making them natural biopolymer substrate materials. Lignin is a natural UV-shielding material due to its high content of phenolic groups. We prepared hybrid films from CNFs and water-based colloidal lignin particles(CLP) by spray deposition using layer-by-layer stacking as well as premixing. The resulting nanostructures were correlated with water imbibition, UV shielding ability and visible light transparency of the films. We found that CNF acts as a directing agent in the premixed system to dominate the uniform distribution of CLP in the thin film, which allows to optimizing the visible light transparency while maintaining the UV-shielding ability.
Keywords: cellulose nanofibrils; colloidal lignin particles; X-ray scattering; UV-shielding