Berlin 2015 – wissenschaftliches Programm
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CPP: Fachverband Chemische Physik und Polymerphysik
CPP 34: P6: Biomaterials and Biopolymers
CPP 34.6: Poster
Dienstag, 17. März 2015, 14:00–16:00, Poster C
AFM studies of adsorbed xylan on cellulosic materials — •Caterina Czibula1,2, Christian Ganser1,2, Albrecht Miletzky2,4, Stefan Spirk3, Robert Schennach2,5, and Christian Teichert1,2 — 1Institute of Physics, Montanuniversitaet Leoben, Austria — 2Christian Doppler Laboratory for Surface Chemical and Physical Fundamentals of Paper Strength, Graz University of Technology, Austria — 3Institute for Chemistry and Technology of Materials, Graz University of Technology, Austria — 4Institute for Paper-, Pulp- and Fibre Technology, Graz University of Technology, Austria — 5Institute of Solid State Physics, Graz University of Technology, Austria
Xylan is the predominant hemicellulose in plants and wood. It is a byproduct in papermaking and the production of regenerated cellulose fibers. To find an additional use of xylan, its ability to positively influence mechanical properties of paper is investigated at the example of a variety of cellulosic substrates. The adsorption of xylan to amorphous cellulose thin films, viscose fibers, and paper fibers is studied. Atomic force microscopy (AFM) is employed to characterize the topography of the samples and to analyze their surfaces. The size of the randomly distributed xylan aggregates varies between 20 nm - 30 nm. The shape, either globular or elongated, is dependent on the electrolyte concentration.