A novel material concept for high strength cellulose composites
Abstract
The invention that should be explored in this project originates from a novel material concept, which unifies delignification and densification of wood resulting in a “green” high performance product. The delignification process, in analogy to common pulp production processes, was optimized to delignify entire wooden blocks and retain their structural integrity. Thereby, the highly beneficial structural directionality of wood is preserved and the wood fibres are not dispensed like in pulp making. In a second step, these cellulosic blocks are strongly densified in a newly developed process combining compression and lateral shear to gain a very compact cellulosic material with entangled fibres and strictly parallel fibre orientation. The obtained material possesses excellent mechanical properties even without a binding matrix. An average elastic modulus of 35 GPa and an average tensile strength of 270 MPa were obtained for the best configuration. Another advantage is that the bulk cellulose material can be more easily modified and functionalized for advanced materials development as the deligification step increases the accessibility of the cell wall in comparison to bulk wood.
delignification wood fibres high performance product pulp production compact cellulosic material
Publikationen
Project staff
Wolfgang Gindl-Altmutter
Univ.Prof. Dipl.-Ing. Dr.nat.techn. Wolfgang Gindl-Altmutter
wolfgang.gindl@boku.ac.at
Tel: +43 1 47654-89111
BOKU Project Leader
01.12.2018 - 30.11.2021
Matthias Jakob
Dipl.-Ing. Dr.nat.techn. Matthias Jakob
matthias.jakob@boku.ac.at
Project Staff
01.12.2018 - 30.11.2021
Felix Karl Georg Neudecker
Dipl.-Ing. Felix Karl Georg Neudecker
felix.neudecker@boku.ac.at
Tel: +43 1 47654-89136
Project Staff
01.12.2018 - 30.11.2021