Berlin 2018 – wissenschaftliches Programm
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CPP: Fachverband Chemische Physik und Polymerphysik
CPP 25: Interfaces and Thin Films II
CPP 25.8: Vortrag
Dienstag, 13. März 2018, 12:00–12:15, PC 203
In situ growth study during spray deposition of bio-based materials — •Calvin Brett1,2,3, Nitesh Mittal1, 2, Wiebke Ohm3, Björn Fricke3, Daniel Söderberg1, and Stephan V. Roth3,4 — 1Department of Mechanics, Royal Institute of Technology (KTH), Stockholm, Sweden — 2Wallenberg Wood Science Center (WWSC), Stockholm, Sweden — 3Photon Science, Deutsches Elektronen-Synchroton (DESY), Hamburg, Germany — 4Department of Fibre and Polymer Technology, Royal Institute of Technology (KTH), Stockholm, Sweden
Assemblies of high aspect-rate nanoparticles are used in large-scale processes to create high-performance materials. We transferred these concepts to self-assembled thin films with tunable properties. Airbrush spray deposition - a scalable and rapid film fabrication process - is used to fabricate cellulose nanofibril (CNF) thin films. CNF as produced from wood presents a renewable and sustainable bio-material which draws increasing attention as template material for flexible, yet disposable electronics. By combining airbrush spray deposition with bio-based materials as CNFs we thus aim for scalable, industrially applicable, sustainable templates. In order to fully understand the fabrication kinetics during film growth, we took the advantage of surface sensitive X-ray scattering techniques in combination with in situ surface differential reflectance spectroscopy. Our study reveals very homogeneous CNF thin films with an unprecedented roughness below 2 nm in combination with a tunable wettability.