Regensburg 2022 – wissenschaftliches Programm

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BP: Fachverband Biologische Physik

BP 28: Biopolymers, Biomaterials and Bioinspired Functional Materials (joint session CPP/BP)

BP 28.1: Hauptvortrag

Freitag, 9. September 2022, 09:30–10:00, H39

New biobased material concepts using scattering techniques to elucidate and control nanoscale assembly — •Daniel Söderberg — KTH Royal Institute of Technology, Department of FIbre and Polymer technology, Stockholm, Sweden

Cellulose, the most abundant biopolymer on earth, can be crucial in mitigating fossil-based resources to more sustainable solutions. It is used as an engineering material, e.g. sawn timber, pulp for papermaking or as a polymer as a basis for plastic materials.

Cellulose nanofibres (CNF) constitute the structural component of plants, it is a semi-crystalline, semi-flexible rod-like nanoparticle having cross-sections in the order of 4-5 nm and lengths around one micrometre. Based on technical developments during the last decades, it is today possible to extract the CNF in large quantities, which has promoted significant research efforts aiming at new material concepts and devices based on cellulose.

Small and wide-angle x-ray scattering have been used to understand nanoscale assembly during fibre spinning from a CNF dope using microfluidics, allowing the tuning of the hierarchical structure, resulting in 100% bio-based filaments with exceptional properties. Furthermore, to develop scalable engineering processes, an in-depth understanding of nanoscale diffusion and the effects of nanoparticle interaction in low-concentration crowded systems has been pursued by combining light-scattering, X-ray Photon Correlation Scattering and coarse-grain modelling.