Monitoring imbibition dynamics at tissue level in Norway spruce using X-ray imaging

Abstract

The study of moisture migration in Norway Spruce may reduce the discrepancy between measurements and simulations of transfers in buildings and thus be helpful for improving their performance and durability. For this purpose, X-ray imaging was used to study moisture migration in Norway spruce during imbibition at tissue level. Moisture content kinetics in earlywood and latewood, based on X-ray attenuation, was observed and measured through rigorous protocol. The imbibition process was studied in both longitudinal and radial directions. The results showed an easier migration of liquid in latewood than in earlywood in the longitudinal uptake. In the radial direction, the impact of compression wood as a barrier and the role of the anatomical structure in the liquid migration were highlighted by the direct visualization of filled tracheids.

Improving the Performance Properties of Impregnated Wood with its Subsequent Utilization into a Biochar Sorbent

“…This method was originally used to detect and localize internal defects in logs (Shi et al, 2022b(Shi et al, , 2022c. With the continuous improvement of technology, it has become more widely used, for example, to check the density and moisture (Martin et al, 2021), to study the development of xylem (Lehnebach et al, 2021), the distribution of fiber texture at the junction of branches and stems (Hu et al, 2022). In addition, X-ray microscopic tomography has been used to study the microstructure and properties of acetylated wood (Sedighi Moghaddam et al, 2017) and wood impregnated with furfuryl alcohol resin (Liu et al, 2021).…”

Influence of Natural Aging on the Moisture Sorption Behaviour of Wooden Structural Components

“…With this technique, up to 23 wood samples can be evaluated simultaneously under the same environmental conditions, thus providing increased accuracy and facilitating comparisons [ 25 ]. Furthermore, various chemical techniques are available for assessing the degradation of wooden artefacts, including wet chemistry [ 1 , 26 ], infrared (IR) spectroscopy [ 27 , 28 , 29 ], near-infrared (NIR) spectroscopy [ 30 , 31 ], Raman spectroscopy [ 27 , 32 ], nuclear magnetic resonance (NMR) spectroscopy [ 27 , 33 , 34 ], gas chromatography–mass spectrometry (GC-MS) [ 27 , 35 , 36 ], direct analysis in real time mass spectrometry (DART-MS) [ 37 , 38 ], and X-ray techniques [ 27 , 39 , 40 ]. IR spectroscopy, which is among the most popular methods for determining the chemical structures of wood, can provide information about the disappearance or generation of various functional groups or chemical bonds based on peak position, shape, and intensity [ 28 ].…”