Time-resolved X-ray microtomographic measurement of water transport in wood-fibre reinforced composite material
Miettinen, A., Harjupatana, T., Kataja, M., Fortino, S., & Immonen, K. (2016). Time-resolved X-ray microtomographic measurement of water transport in wood-fibre reinforced composite material. In B. Madsen, A. Biel, Y. Kusano, H. Lilholt, L. P. Mikkelsen, L. Mishnaevsky, Jr., & B. F. Sørensen (Eds.), 37th Risø International Symposium on Materials Science (pp. 012037). IOP Conference Series : Materials Science and Engineering, 139 (1). Institute of Physics Publishing Ltd.. doi:10.1088/1757-899X/139/1/012037
© the Authors, 2016. Published under licence by IOP Publishing Ltd. This is an open access article distributed under the terms of a Creative Commons License.
Natural fibre composites are prone to absorb moisture from the environment which may lead to dimensional changes, mold growth, degradation of mechanical properties or other adverse effects. In this work we develop a method for direct non-intrusive measurement of local moisture content inside a material sample. The method is based on X-ray microtomography, digital image correlation and image analysis. As a first application of the method we study axial transport of water in a cylindrical polylactic acid/birch pulp composite material sample with one end exposed to water. Based on the results, the method seems to give plausible estimates of water content profiles inside the cylindrical sample. The results may be used, e.g., in developing and validating models of moisture transport in biocomposites.