Regensburg 2004 – wissenschaftliches Programm

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SYLS: Life Sciences on the Nanometer Scale - Physics Meets Biology

SYLS 3: Symposium "Life Sciences on the Nanometer Scale - Physics Meets Biology"

SYLS 3.53: Poster

Mittwoch, 10. März 2004, 16:00–18:30, B

Mechanical properties of cellulose fibres — •Klaas Kölln¹, Claas Behrend¹, Ingo Grotkopp¹, Sergio S. Funari², Martin Dommach², Stephan V. Roth³, Manfred Burghammer³, and Martin Müller¹ — ¹IEAP, Uni Kiel, 24098 Kiel — ²MPIKG Golm c/o HASYLAB, Hamburg — ³ESRF, Grenoble, France

The structural biomaterial cellulose is a composite of nanocrystalline cellulose microfibrils embedded in a disordered matrix of cellulose and other polysaccharides. The viscoelastic mechanical properties reflect this morphology. In order to understand the structure–properties relation of cellulose fibres, we carried out tensile tests in situ while taking X–ray diffraction patterns using synchrotron radiation. Fibre bundles were investigated at HASYLAB, single fibres at ESRF. Two mechanisms on the microscopic scale could be identified: A rotation of the microfibrils and a stretching of the individual microfibrils.