Publicación: DENSIFICATION OF WOOD VANEERS COMBINED WITW OIL-HEAT TREATMENT. PART III: CELL WALL MECHANICAL PROPERTIES DETYRMINED BY NAOINDENTATION.
dc.creator | WILLIAM ARNOLDO GACITÚA ESCOBAR | |
dc.creator | CECILIA DEL CARMEN BUSTOS ÁVILA | |
dc.date | 2012 | |
dc.date.accessioned | 2025-01-10T14:35:54Z | |
dc.date.available | 2025-01-10T14:35:54Z | |
dc.date.issued | 2012 | |
dc.description.abstract | COMPRESSION UNDER THE EFFECT OF HEAT AND STEAM, ALSO CALLED THERMO-HYGROMECHANICAL (THM) DENSIFICATION, CAN INCREASE WOOD DENSITY AND THEREFORE IMPROVE ITS STRENGTH, STIFFNESS, AND HARDNESS. OIL-HEAT TREATMENT (OHT) IS ALSO KNOWN TO REDUCE WOOD?S HYGROSCOPICITY AND IMPROVE DIMENSIONAL STABILITY. A COMBINATION OF BOTH TREATMENTS CAN THEREFORE PRODUCE WOOD WITH IMPROVED MECHANICAL PROPERTIES AND DIMENSIONAL STABILITY. THE OBJECTIVE OF THIS PROJECT WAS TO DETERMINE CELL WALL MECHANICAL PROPERTIES OF THM-DENSIFIED AND OHT WOOD. TREMBLING ASPEN VENEERS WERE DENSIFIED BY A THM PROCESS AND SUBSEQUENTLY TREATED IN CANOLA OIL AT 200 AND 220°C. NANOINDENTATIONS WERE PERFORMED IN EARLYWOOD CELL WALLS. THE RESULTS SHOW THAT CELL WALL LONGITUDINAL MODULUS OF ELASTICITY INCREASED SIGNIFICANTLY FROM 13.5 GPA FOR THE CONTROL TO A MAXIMUM OF 18.2 GPA FOR THM DENSIFIED WOOD WITH OR WITHOUT OHT. CELL WALL HARDNESS INCREASED FROM 0.27 GPA TO A MAXIMUM OF 0.43 GPA. BOTH THM DENSIFICATION AND OHT SIGNIFICANTLY INCREASED CELL WALL HARDNESS. THEREFORE, THE INCREASE IN MECHANICAL PROPERTIES OF THM-DENSIFIED AND OHT WOOD CAN BE DUE TO AN INCREASE IN WOOD DENSITY RESULTING FROM A REDUCTION IN POROSITY BUT ALSO TO AN INCREASE IN THE MECHANICAL PROPERTIES OF THE CELL WALL. | |
dc.format | application/pdf | |
dc.identifier.issn | 1930-2126 | |
dc.identifier.issn | 1930-2126 | |
dc.identifier.uri | https://repositorio.ubiobio.cl/handle/123456789/8127 | |
dc.language | spa | |
dc.publisher | BIORESOURCES | |
dc.rights | PUBLICADA | |
dc.title | DENSIFICATION OF WOOD VANEERS COMBINED WITW OIL-HEAT TREATMENT. PART III: CELL WALL MECHANICAL PROPERTIES DETYRMINED BY NAOINDENTATION. | |
dc.type | ARTÍCULO | |
dspace.entity.type | Publication | |
ubb.Estado | PUBLICADA | |
ubb.Otra Reparticion | DEPARTAMENTO DE INGENIERIA EN MADERAS | |
ubb.Otra Reparticion | DEPARTAMENTO DE INGENIERIA EN MADERAS | |
ubb.Sede | CONCEPCIÓN | |
ubb.Sede | CONCEPCIÓN |