| Revue: | Maderas : ciencia y tecnología |
| Base de datos: | |
| Número de sistema: | 000534548 |
| ISSN: | 0718-221X |
| Autores: | Pratiwi, Lisa Adina1 Darmawan, Wayan1 Priadi, Trisna1 George, Béatrice2 Merlin, André2 Gérardin, Christine2 Dumarçay, Stéphane2 Gérardin, Philippe2 |
| Instituciones: | 1Bogor Agricultural University Faculty of Forestry Department of Forest Products, Indonesia 2Université de Lorraine Faculté des Sciences et Technologies Laboratoire d’Etudes et de Recherche sur le Matériau Bois, Vandoeuvre-lès-Nancy. France |
| Año: | 2019 |
| Volumen: | 21 |
| Número: | 2 |
| Paginación: | 209-222 |
| País: | Chile |
| Idioma: | Inglés |
| Resumen en inglés | Many wood processing industries use short rotation teak, which has lower quality especially in durability and dimensional stability. Heat treatment is an eco-friendly method to improve dimensional stability and durability of wood. The objectives of the study were to investigate the effects of thermal modification on chemical composition, colour, dimensional stability and durability as well as coating’s performance after accelerated weathering of short and long rotation teak for exterior utilization. In this study, the samples were heated in oven at 220 °C for 20 h under nitrogen atmosphere. Results showed that independently of growth conditions teak woods underwent hemicelluloses degradation and an increase of lignin content after heat treatment. Extractives contents were lower in short rotation than in long rotation teak, and decreased in all cases after heat treatments. Dimensional stability was considerably improved as indicated by anti-swelling efficiency values of 64,9% and 58,9% for short and long rotation teak, respectively. Heated teak woods were more resistant against Trametes versicolor and the durability of short-rotation teak increased from moderate to very durable. Coatings on heat treated teaks had better bonding quality and better photo-stability when compared to unheated. Heated short rotation teak could be considered for exterior application. |
| Keyword: | Dimensional stability, Durability, Heat treatment, Tectona grandis, Weathering. |
| Texte intégral: | Texto completo (Ver HTML) Texto completo (Ver PDF) |
