Effects of moisture and cellulose fibril angle on the tensile properties of native single Norway spruce wood fibres

Research output: Contribution to journalResearch articleContributedpeer-review

Contributors

  • Nils Horbelt - , Max Planck Institute of Colloids and Interfaces (Author)
  • John W.C. Dunlop - , University of Salzburg (Author)
  • Luca Bertinetti - , Chair of Bioprospecting, Max Planck Institute of Colloids and Interfaces (Author)
  • Peter Fratzl - , Max Planck Institute of Colloids and Interfaces (Author)
  • Michaela Eder - , Max Planck Institute of Colloids and Interfaces (Author)

Abstract

Isolated single wood fibres with cellulose fibril angles from 10 to 43° were tested in microtensile tests under controlled temperature and relative humidity of 5, 50, 75, 90% and in the wet state. This systematic study provides experimental stiffness and strength data, calculated on cell wall cross sections. It has been shown that stiffness reduction with increasing moisture content is more pronounced in fibres with large cellulose fibril angles. Interestingly, stiffness reduction in fibres with low cellulose fibril angles has been observed for the fully hydrated state only. The experimental dataset was fed into a model to determine moisture dependent stiffness of the hemicellulose-lignin-matrix and the stresses acting on the fibrils and the matrix.

Details

Original languageEnglish
Pages (from-to)1305-1318
Number of pages14
JournalWood science and technology
Volume55
Issue number5
Publication statusPublished - Sept 2021
Peer-reviewedYes

External IDs

ORCID /0000-0002-4666-9610/work/142238929