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Assessment of wood microstructural changes after one-stage thermo-hydro treatment (THT) by micro X-ray computed tomography

(2016) HOLZFORSCHUNG. 70(2). p.167-177
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Abstract
The microstructural changes in a selection of softwoods and hardwoods resulting from thermo-hydro treatment (THT) at 160°C were examined by means of a state-of-the-art micro X-ray computed tomography. A dedicated X-ray scanning and volumetric processing protocol was developed. All reconstructed volumes had an approximate voxel pitch between 0.8 and 1.2 μm3. The microstructures of the same needle-shaped specimens before and after THT were visualized, and the individual parameters (maximum opening and lumen volume) for various cell types were quantified and compared. The highest values of substance volume were recorded for the ash sapwood (81%) and spruce specimens (72%). After THT, a significant correlation was found between the mass loss determined by gravimetry and the X-ray volume loss. The largest change occurred in the lumen volume of several tissue components, such as libriform fibers, tracheids, and ray parenchyma. The average aspen fiber volume reduction after THT was 31%, a value 2.6 times higher than the volume reduction of the average vessels. The porosity of ash sapwood increased from 41 to 56%, whereas the porosity of birch decreased from 34 to 29%.
Keywords
micro X-ray computed tomography, porosity, thermo-hydro treatment, wood microstructure, SILVER BIRCH, MICROTOMOGRAPHY

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Chicago
Biziks, Vladimir, Jan Van den Bulcke, Juris Grinnins, Holger Militz, Bruno Andersons, Ingeborga Andersone, Jelle Dhaene, and Joris Van Acker. 2016. “Assessment of Wood Microstructural Changes After One-stage Thermo-hydro Treatment (THT) by Micro X-ray Computed Tomography.” Holzforschung 70 (2): 167–177.
APA
Biziks, V., Van den Bulcke, J., Grinnins, J., Militz, H., Andersons, B., Andersone, I., Dhaene, J., et al. (2016). Assessment of wood microstructural changes after one-stage thermo-hydro treatment (THT) by micro X-ray computed tomography. HOLZFORSCHUNG, 70(2), 167–177.
Vancouver
1.
Biziks V, Van den Bulcke J, Grinnins J, Militz H, Andersons B, Andersone I, et al. Assessment of wood microstructural changes after one-stage thermo-hydro treatment (THT) by micro X-ray computed tomography. HOLZFORSCHUNG. 2016;70(2):167–77.
MLA
Biziks, Vladimir, Jan Van den Bulcke, Juris Grinnins, et al. “Assessment of Wood Microstructural Changes After One-stage Thermo-hydro Treatment (THT) by Micro X-ray Computed Tomography.” HOLZFORSCHUNG 70.2 (2016): 167–177. Print.
@article{6870176,
  abstract     = {The microstructural changes in a selection of softwoods and hardwoods resulting from thermo-hydro treatment (THT) at 160{\textdegree}C were examined by means of a state-of-the-art micro X-ray computed tomography. A dedicated X-ray scanning and volumetric processing protocol was developed. All reconstructed volumes had an approximate voxel pitch between 0.8 and 1.2 \ensuremath{\mu}m3. The microstructures of the same needle-shaped specimens before and after THT were visualized, and the individual parameters (maximum opening and lumen volume) for various cell types were quantified and compared. The highest values of substance volume were recorded for the ash sapwood (81\%) and spruce specimens (72\%). After THT, a significant correlation was found between the mass loss determined by gravimetry and the X-ray volume loss. The largest change occurred in the lumen volume of several tissue components, such as libriform fibers, tracheids, and ray parenchyma. The average aspen fiber volume reduction after THT was 31\%, a value 2.6 times higher than the volume reduction of the average vessels. The porosity of ash sapwood increased from 41 to 56\%, whereas the porosity of birch decreased from 34 to 29\%.},
  author       = {Biziks, Vladimir and Van den Bulcke, Jan and Grinnins, Juris and Militz, Holger and Andersons, Bruno and Andersone, Ingeborga and Dhaene, Jelle and Van Acker, Joris},
  issn         = {0018-3830},
  journal      = {HOLZFORSCHUNG},
  keyword      = {micro X-ray computed tomography,porosity,thermo-hydro treatment,wood microstructure,SILVER BIRCH,MICROTOMOGRAPHY},
  language     = {eng},
  number       = {2},
  pages        = {167--177},
  title        = {Assessment of wood microstructural changes after one-stage thermo-hydro treatment (THT) by micro X-ray computed tomography},
  url          = {http://dx.doi.org/10.1515/hf-2014-0337},
  volume       = {70},
  year         = {2016},
}

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