Wettability and decay of particleboards manufactured with thermally treated sugarcane residue and bamboo (Dendrocalamus asper) particles
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| Format: | Artículo científico |
| Language: | en |
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Universidad del Bío Bío
2022
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| _version_ | 1876439277145948160 |
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| author | Flávia Maria Silva Brito |
| author_facet | Flávia Maria Silva Brito |
| contents | Wettability and decay of particleboards manufactured with thermally treated sugarcane residue and bamboo (Dendrocalamus asper) particles Flávia Maria Silva Brito Geraldo Bortoletto Juarez Benigno Paes Agrociencias contact angle wood decay fungi Chemical composition thermal modification medium density particleboards This study aimed to evaluate the chemical composition of wood particles (control and treated), and the effects of thermal modification and adhesive levels on the wettability and biological resistance of particleboards made of sugarcane residue and bamboo (Dendrocalamus asper). Therefore, 75% bamboo particles and 25% sugarcane residue (bagasse) were used for producing the particleboards. The particles were treated at 220 °C for 3h35min. Urea formaldehyde (UF) adhesive was used in three solid contents (10%, 12% and 14%) based on the dry mass of the particles. The mat was cold pre-consolidated (pressure of 0,5 MPa for 5 min) and after hot consolidated (3,45 MPa, 180 ºC, 10 min). Water and ethylene glycol and two measurement times were used to measure the contact angle. Gloeophyllum trabeum and Rhodonia placenta (brown rot) and Trametes versicolor (white rot) fungi were used for the biological resistance test. There was a change in the chemical composition of the treated particles such as a reduction in the levels of lignin (bagasse and bamboo), total extracts and holocellulose (bagasse). The thermal treatment increased the final contact angles obtained with water. The particleboard surfaces were classified as non-wettable and partially wettable to the tested solvents. The thermal treatment provided biological resistance improvements in the particleboards to the tested fungi, being classified as very resistant to Rhodonia placenta, resistant to very resistant to Gloeophyllum trabeum, and moderate to resistant to Trametes versicolor. 2022 artículo científico 0717-3644 https://www.redalyc.org/articulo.oa?id=48575019030 https://www.redalyc.org/journal/485/48575019030/ https://www.redalyc.org/journal/485/48575019030/html/ https://www.redalyc.org/journal/485/48575019030/48575019030.epub https://www.redalyc.org/journal/485/48575019030/movil 10.4067/s0718-221x2022000100430 en http://www.redalyc.org/revista.oa?id=485 Maderas. Ciencia y Tecnología application/pdf Universidad del Bío Bío Maderas. Ciencia y Tecnología (Chile) Vol.24 |
| format | Artículo científico |
| id | redalyc_48575019030 |
| institution | Redalyc |
| language | en |
| publishDate | 2022 |
| publisher | Universidad del Bío Bío |
| spellingShingle | Wettability and decay of particleboards manufactured with thermally treated sugarcane residue and bamboo (Dendrocalamus asper) particles Flávia Maria Silva Brito Agrociencias contact angle wood decay fungi Chemical composition thermal modification medium density particleboards Wettability and decay of particleboards manufactured with thermally treated sugarcane residue and bamboo (Dendrocalamus asper) particles Flávia Maria Silva Brito Geraldo Bortoletto Juarez Benigno Paes Agrociencias contact angle wood decay fungi Chemical composition thermal modification medium density particleboards This study aimed to evaluate the chemical composition of wood particles (control and treated), and the effects of thermal modification and adhesive levels on the wettability and biological resistance of particleboards made of sugarcane residue and bamboo (Dendrocalamus asper). Therefore, 75% bamboo particles and 25% sugarcane residue (bagasse) were used for producing the particleboards. The particles were treated at 220 °C for 3h35min. Urea formaldehyde (UF) adhesive was used in three solid contents (10%, 12% and 14%) based on the dry mass of the particles. The mat was cold pre-consolidated (pressure of 0,5 MPa for 5 min) and after hot consolidated (3,45 MPa, 180 ºC, 10 min). Water and ethylene glycol and two measurement times were used to measure the contact angle. Gloeophyllum trabeum and Rhodonia placenta (brown rot) and Trametes versicolor (white rot) fungi were used for the biological resistance test. There was a change in the chemical composition of the treated particles such as a reduction in the levels of lignin (bagasse and bamboo), total extracts and holocellulose (bagasse). The thermal treatment increased the final contact angles obtained with water. The particleboard surfaces were classified as non-wettable and partially wettable to the tested solvents. The thermal treatment provided biological resistance improvements in the particleboards to the tested fungi, being classified as very resistant to Rhodonia placenta, resistant to very resistant to Gloeophyllum trabeum, and moderate to resistant to Trametes versicolor. 2022 artículo científico 0717-3644 https://www.redalyc.org/articulo.oa?id=48575019030 https://www.redalyc.org/journal/485/48575019030/ https://www.redalyc.org/journal/485/48575019030/html/ https://www.redalyc.org/journal/485/48575019030/48575019030.epub https://www.redalyc.org/journal/485/48575019030/movil 10.4067/s0718-221x2022000100430 en http://www.redalyc.org/revista.oa?id=485 Maderas. Ciencia y Tecnología application/pdf Universidad del Bío Bío Maderas. Ciencia y Tecnología (Chile) Vol.24 |
| title | Wettability and decay of particleboards manufactured with thermally treated sugarcane residue and bamboo (Dendrocalamus asper) particles |
| topic | Agrociencias contact angle wood decay fungi Chemical composition thermal modification medium density particleboards |
| url | https://www.redalyc.org/articulo.oa?id=48575019030 https://www.redalyc.org/journal/485/48575019030/ https://www.redalyc.org/journal/485/48575019030/html/ https://www.redalyc.org/journal/485/48575019030/48575019030.epub https://www.redalyc.org/journal/485/48575019030/movil |