| About this Abstract |
| Meeting |
2023 TMS Annual Meeting & Exhibition
|
| Symposium
|
Biological Materials Science
|
| Presentation Title |
Micro X-ray Computed Tomography Study of Moisture-induced Swelling in the Wood Cellular Structure |
| Author(s) |
Joseph Jakes, Xavier Arzola, Carlos Baez, Roderic Lakes, Donald Stone |
| On-Site Speaker (Planned) |
Joseph Jakes |
| Abstract Scope |
Wood is an anisotropic cellular material that swells and shrinks with changes in moisture content. However, the multiscale structure-property relationships needed to understand swelling in wood remain incomplete, especially at the smaller length scales in intact wood. To quantify how much cell walls swell in intact wood, we used synchrotron-based micro X-ray computed tomography (μXCT) and a custom-built relative humidity (RH) chamber to capture three-dimensional images of Loblolly pine (Pinus taeda) wood conditioned at different RH’s. A new segmentation process based on U-Net convolutional neural networks was developed to segment the μXCT images into air and cell wall components. These experiments quantified how much the cell wall itself swelled during moisture sorption and resulted in the first measurements of the coefficient of hygroexpansion of wood cell walls in intact wood. New insights into the three-dimensional deformations in the intact wood cellular structure were also gained. |
| Proceedings Inclusion? |
Planned: |