| Revue: | Maderas : ciencia y tecnología |
| Base de datos: | PERIÓDICA |
| Número de sistema: | 000274899 |
| ISSN: | 0718-221X |
| Autores: | Boonstra, M.J1 Rijsdijk, J.F Sander, C2 Kegel, E Tjeerdsma, B3 Militz, H4 Acker, J. van5 Stevens, M |
| Instituciones: | 1Plato International, Arnhem. Holanda 2RINNTECH - Frank Rinn Engineering and Distribution, Heidelberg, Baden-Wurttemburg. Alemania 3SHR Hout Research, Wageningen, Gelderland. Holanda 4Georg-August-Universitat Gottingen, Gottingen, Niedersachsen. Alemania 5Ghent University, Laboratory of Wood Technology, Gante. Bélgica |
| Año: | 2006 |
| Volumen: | 8 |
| Número: | 3 |
| Paginación: | 209-218 |
| País: | Chile |
| Idioma: | Inglés |
| Tipo de documento: | Artículo |
| Enfoque: | Experimental, analítico |
| Resumen en inglés | Heat treatment of wood is an effective method to improve the dimensional stability and durability against biodegradation. Optimisation of a two-stage heat treatment process at relatively mild conditions (<200°C) and its effect on the anatomical structure of hardwoods were investigated by means of a light and scanning electron microscopic analysis. Hardwood species such as beech and poplar, were predominantly sensitive to collaps of the vessels and some deformation of the libriform fibres directly near the vessels. In treated beech and birch radial cracks were observed near the rays. Optimisation of the heat treatment process conditions including the application of a steam hydro thermolysis stage reduced such damages to a minimum. Broken cell walls perpendicular to the fibre direction resulting in transverse ruptures has been noticed in heat treated hardwood species. This contributes to abrupt fractures of treated wood as observed in bending tests which can lead to considerably different failure behavior after impact of mechanical stress. In some treated hardwood species maceration (small cracks between tracheids) was noticed after heat treatment. Heat treatment did not reveal damage to the ray parenchyma pit membranes, bordered pits and large window pit membranes; and the margo fibrils appeared without damage |
| Disciplinas: | Ingeniería, Agrociencias, Biología |
| Palabras clave: | Ingeniería industrial, Silvicultura, Anatomía e histología, Madera, Secado, Anatomía de la madera |
| Keyword: | Engineering, Agricultural sciences, Biology, Industrial engineering, Silviculture, Anatomy and histology, Wood, Drying, Wood anatomy |
| Texte intégral: | Texto completo (Ver HTML) |
