Dresden 2017 – wissenschaftliches Programm

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CPP: Fachverband Chemische Physik und Polymerphysik

CPP 57: Thin Films, Nanostructures and Nanoparticles I

CPP 57.9: Vortrag

Donnerstag, 23. März 2017, 12:30–12:45, ZEU 114

In situ GISAXS analysis of spray deposited biopolymer thin films — Wiebke Ohm¹, Björn Beyersdorff¹, Matthias Schwartzkopf¹, Pallavi Pandit¹, Calvin Brett¹, Marc Gensch¹, Shun Yu², Nitesh Mittal², Daniel Söderberg², and •Stephan Roth^1,2 — ¹Deutsches Elektronen-Synchrotron Hamburg, Notkestraße 85, 22607 Hamburg — ²KTH Royal Institute of Technology, Department of Fibre and Polymer Technology, Teknikringen 56-58, SE-100 44 Stockholm, Sweden

Flexible biopolymer substrates based on cellulose nanofibrils (CNFs) are gaining increasing interest for nanotechnology such as organic electronics or solar cells since they present a renewable and sustainable alternative for synthetic polymers. In view of efficient industrial scalable fabrication, both the controlled arrangement of the CNFs during deposition and the use of industrial compatible deposition processes are essential.

We thus applied air-brush spray deposition of aqueous dispersions of CNF/water as a versatile deposition technique for preparing of cellulose thin films [1]. In situ grazing incidence small angle x-ray scattering (GISAXS) and atomic force microscopy measurements revealed the inner structure of these cellulose films. The effect of different types of CNFs was explored, enzymatic cellulose as well as TEMPO oxidized cellulose with different surface charges. The influence of different incidence angles of the spray was studied to reveal the impact on ordering of the CNFs. [1] Roth, J. Phys.: Condens. Matter 28, 403003(2016)