Regensburg 2025 – wissenschaftliches Programm

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CPP: Fachverband Chemische Physik und Polymerphysik

CPP 34: Focus Session: Interactions Between Water and Cellulose I

CPP 34.2: Vortrag

Donnerstag, 20. März 2025, 15:30–15:45, H34

Using Nanocellulose Hygroscopicity for Conductive 3D Paper Structures — •Marie Betker^1,2, Tim Erichlandwehr³, Benedikt Sochor^1,4, Elisabeth Erbes^1,5, Yamit Alon², Alisher Kurmanbay², Yanan Li⁶, Irene Fernandez-Cuesta³, Peter Müller-Buschbaum⁶, Simone Techert^1,5, Daniel Söderberg^2,7, and Stephan Roth^1,2,7 — ¹Deutsches Elektronen Synchrotron, Notkestrasse 85, 22607 Hamburg, Germany — ²KTH Royal Institute of Technology, Teknikringen 56, 10044 Stockholm, Sweden — ³Hamburg Advanced Research Centre for Bioorganic Chemistry, Universität Hamburg, Luruper Chaussee 149, 22761 Hamburg, Germany — ⁴Lawrence Berkeley National Laboratory, 6 Cyclotron Rd, Berkeley, CA 94720, USA — ⁵Institute for X-ray Physics, Goettingen University, Friedrich Hund Platz 1, 37077 Göttingen, Germany — ⁶TUM School of Natural Sciences, Chair for Functional Materials, 85748 Garching, Germany — ⁷Wallenberg Wood Science Center, Teknikringen 52, 10044 Stockholm, Sweden

We report the fabrication of the, to this date, thinnest sprayed nanopaper foils. For that, we spray aqueous nanocellulose dispersions layer-by-layer on a hot substrate. The foils are only 2 um thin with an average basic weight of 1.9 g/square metre. We specifically exploit the hygroscopicity of paper-based materials to rearrange our water-soaked foils into three-dimensional, free-standing shapes. We further demonstrate the applicability of our foils by making them conductive via integration of silver nanowires. This approach is a step towards more sustainable, 3D organic electronics.

Keywords: nanocellulose; nanopaper; spray deposition; 3D shapes