Regensburg 2013 – wissenschaftliches Programm
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CPP: Fachverband Chemische Physik und Polymerphysik
CPP 35: Poster: Biomaterials and Biopolymers (joint session BP/CPP)
CPP 35.4: Poster
Mittwoch, 13. März 2013, 16:30–18:30, Poster C
Water absorption of cellulose fibers and possible morphological influences — •Patrice Kreiml1,2, Christian Ganser1,2, Roland Morak1, Oskar Paris1, Robert Schennach2,3, and Christian Teichert1,2 — 1Institute of Physics, Montanuniversität Leoben, Franz Josef - Str. 18, 8700 Leoben, Austria — 2Christian Doppler Laboratory for Surface Chemical and Physical Fundamentals of Paper Strength, Graz University of Technology, Petersgasse 16/2, 8010 Graz, Austria — 3Institute of Solid State Physics, Graz University of Technology, Petersgasse 16/2, 8010 Graz, Austria
Fibers are used in textiles, hygiene products, and medical applications. The water absorption is an important property in the applications mentioned. In this study, the water absorption of different fiber types was measured. The method of choice is a micro balance, which allows to detect a change in mass by increasing and decreasing the partial water vapor pressure at a constant temperature. The result is an isothermal hysteresis that yields the water absorption and desorption with respect to the relative humidity. Additionally, the morphology of two sets of viscose fibers was characterized by atomic-force microscopy (AFM). The two sets of samples were produced under the same conditions, but exhibited a difference in water absorption. A comprehensive roughness analysis showed no significant differences in the roughness parameters. However, on the surfaces of all samples trenches could be observed. Preliminary results indicate an influence of trench density on the water absorption. Supported by Kelheim Fibres and the Christian Doppler Research Society, Vienna Austria.