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Effects of thermal modification on wood ultrastructure analyzed with crystallographic texture

  • Wiesław Olek EMAIL logo und Jan T. Bonarski
Veröffentlicht/Copyright: 29. Januar 2014
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Abstract

The changes in ultrastructure of thermally modified beech and poplar wood have been studied by means of the crystallographic texture analysis. The experimental pole figures have been registered based on the X-ray diffraction (XRD). The 3D texture function, i.e., the orientation distribution function (ODF) was calculated with the use of the procedure implemented for materials with the monoclinic lattice symmetry. The inverse pole figures were recalculated from the obtained ODF. Areas with specific crystallographic organization in wood were identified and gradual changes in intensities of moderately oriented areas were observed. Simultaneously, additional reorganization of crystalline cellulose was observed as a result of heat treatment. The integrated skeleton lines confirmed the gradual decomposition of hemicelluloses as well as the temporary increase of cellulose self-organization.


Corresponding author: Wiesław Olek, Faculty of Wood Technology, Poznań University of Life Sciences, ul. Wojska Polskiego 28, 60-637 Poznań, Poland, Tel.: +48601519816, Fax: +48618487146, e-mail:

Acknowledgments

The work was financially supported by the Ministry of Science and Higher Education as the N N309 2876 3 research grant as well as by the National Science Centre as the 2011/01/M/NZ9/00028 research grant.

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Received: 2013-8-30
Accepted: 2014-1-10
Published Online: 2014-1-29
Published in Print: 2014-8-1

© 2014 by De Gruyter

Artikel in diesem Heft

  1. Frontmatter
  2. Original Articles
  3. Lignin chemistry and topochemistry during kraft delignification of Eucalyptus globulus genotypes with contrasting pulpwood characteristics
  4. Rapid functionalisation of cellulose-based materials using a mixture containing laccase activated lauryl gallate and sulfonated lignin
  5. Aggregation of sodium lignosulfonate above a critical temperature
  6. Impact of iron(II) and oxygen on degradation of oak – modeling of the Vasa wood
  7. Morphological, thermal, and structural aspects of dried and redispersed nanofibrillated cellulose (NFC)
  8. Effects of recovered wood on the formaldehyde release of particleboards
  9. Oxalic acid production and metal removal during fungal degradation of CCA-treated wood in nutrient culture
  10. Analysis of cold temperature effect on stress wave velocity in green wood
  11. Finite element modeling and experimental validation of radio frequency heating (RFH) of curved laminated wood-based panels
  12. Anti-termitic potential of heartwood and bark extract and chemical compounds isolated from Madhuca utilis Ridl. H. J. Lam and Neobalanocarpus heimii King P. S. Ashton
  13. Effects of thermal modification on wood ultrastructure analyzed with crystallographic texture
  14. Short Notes
  15. Potential contribution of anion exclusion to hydroxide penetration in green liquor-modified kraft pulping
  16. Improving the weathering on larch wood samples by electron beam irradiation (EBI)
  17. Effect of plasma treatment on cell-wall adhesion of urea-formaldehyde resin revealed by nanoindentation
  18. Imaging hyphal growth of Physisporinus vitreus in Norway spruce wood by means of confocal laser scanning microscopy (CLSM)
  19. Meetings
  20. Meetings
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