title: Mechanical properties of cellulose fibres and wood. Orientational aspects in situ investigated with synchrotron radiation.
abstract: Highly oriented native cellulose fibres (flax) and softwood (pine) have been investigated by means of X-ray diffraction. Local structural information was obtained by using X-ray microbeams. Tensile tests were performed in situ, revealing a change of orientation of cellulose microfibrils in materials with tensile strain. In flax fibres, the microfibrils rotate during the first percent of stretching, into a more parallel orientation with respect to the fibre axis. For wood, a decrease of orientation with the onset of strain hardening is found for the first time.
authors.affiliation: Institut für Experimentelle und Angewandte Physik, Universität Kiel, Leibnizstrasse 19, D-24098 Kiel, Germany.
authors.forename: Klaas
authors.initials: K
authors.lastname: Kölln
authors.forename: Ingo
authors.initials: I
authors.lastname: Grotkopp
authors.forename: Manfred
authors.initials: M
authors.lastname: Burghammer
authors.forename: Stephan V
authors.initials: SV
authors.lastname: Roth
authors.forename: Sergio S
authors.initials: SS
authors.lastname: Funari
authors.forename: Martin
authors.initials: M
authors.lastname: Dommach
authors.forename: Martin
authors.initials: M
authors.lastname: Müller
mesh_terms: D002482:Cellulose / Q000648:ultrastructure*; D017356:Synchrotrons; D013718:Tensile Strength; D014934:Wood; D014961:X-Ray Diffraction / Q000379:methods*
chemical_list: D002482:Cellulose