Chemical and Mechanical Characterization of Thermally Modified Gmelina arborea Wood
Gmelina arborea (Roxb. ex. Sm.) wood samples were thermally modified at 180 °C, 200 °C and 220 °C for 3 h, by employing a process similar to ThermoWood®. The resulting effects on the basic chemical composition and mechanical properties were determined. The results were analyzed statistically with A...
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| Format: | Article |
| Language: | English |
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University of Ljubljana Press (Založba Univerze v Ljubljani)
2021-05-01
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| Series: | Les |
| Subjects: | |
| Online Access: | https://journals.uni-lj.si/les-wood/article/view/12104 |
| _version_ | 1797950986076028928 |
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| author | Maxidite Amankwaah Minkah Kojo Agyapong Afrifah Djeison Cesar Batista Holger Militz |
| author_facet | Maxidite Amankwaah Minkah Kojo Agyapong Afrifah Djeison Cesar Batista Holger Militz |
| author_sort | Maxidite Amankwaah Minkah |
| collection | DOAJ |
| description |
Gmelina arborea (Roxb. ex. Sm.) wood samples were thermally modified at 180 °C, 200 °C and 220 °C for 3 h, by employing a process similar to ThermoWood®. The resulting effects on the basic chemical composition and mechanical properties were determined. The results were analyzed statistically with ANOVA, and Least Square Deviation was used to compare means. Generally, after the thermal modification (TM) process, the cellulose, hemicelluloses and extractives content decreased significantly. By contrast, lignin proportions increased significantly. Untreated wood and samples modified at 180 °C indicated comparable modulus of elasticity (MOE), modulus of rupture (MOR), degree of integrity (I), fine fraction (F) and resistance to impact milling (RIM). Noteworthy reductions however occurred at 200 °C and 220 °C. Significant increases in Brinell hardness (BH) took place at 180 °C, recording a high decrease at 220 °C. Gmelina arborea could be modified suitably at 180 °C for structural and other purposes. To take advantage of other improved properties, modification at 200 °C could be employed for non-structural uses.
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| first_indexed | 2024-04-10T22:23:45Z |
| format | Article |
| id | doaj.art-0f8d28b8d8ab444aa41ecc9b96e7bf66 |
| institution | Directory Open Access Journal |
| issn | 0024-1067 2590-9932 |
| language | English |
| last_indexed | 2024-04-10T22:23:45Z |
| publishDate | 2021-05-01 |
| publisher | University of Ljubljana Press (Založba Univerze v Ljubljani) |
| record_format | Article |
| series | Les |
| spelling | doaj.art-0f8d28b8d8ab444aa41ecc9b96e7bf662023-01-17T10:36:40ZengUniversity of Ljubljana Press (Založba Univerze v Ljubljani)Les0024-10672590-99322021-05-0170110.26614/les-wood.2021.v70n01a02Chemical and Mechanical Characterization of Thermally Modified Gmelina arborea WoodMaxidite Amankwaah MinkahKojo Agyapong AfrifahDjeison Cesar BatistaHolger Militz Gmelina arborea (Roxb. ex. Sm.) wood samples were thermally modified at 180 °C, 200 °C and 220 °C for 3 h, by employing a process similar to ThermoWood®. The resulting effects on the basic chemical composition and mechanical properties were determined. The results were analyzed statistically with ANOVA, and Least Square Deviation was used to compare means. Generally, after the thermal modification (TM) process, the cellulose, hemicelluloses and extractives content decreased significantly. By contrast, lignin proportions increased significantly. Untreated wood and samples modified at 180 °C indicated comparable modulus of elasticity (MOE), modulus of rupture (MOR), degree of integrity (I), fine fraction (F) and resistance to impact milling (RIM). Noteworthy reductions however occurred at 200 °C and 220 °C. Significant increases in Brinell hardness (BH) took place at 180 °C, recording a high decrease at 220 °C. Gmelina arborea could be modified suitably at 180 °C for structural and other purposes. To take advantage of other improved properties, modification at 200 °C could be employed for non-structural uses. https://journals.uni-lj.si/les-wood/article/view/12104High-Energy Multiple Impact (HEMI)Resistance to Impact Milling (RIM)Thermal modificationStatic Bending |
| spellingShingle | Maxidite Amankwaah Minkah Kojo Agyapong Afrifah Djeison Cesar Batista Holger Militz Chemical and Mechanical Characterization of Thermally Modified Gmelina arborea Wood Les High-Energy Multiple Impact (HEMI) Resistance to Impact Milling (RIM) Thermal modification Static Bending |
| title | Chemical and Mechanical Characterization of Thermally Modified Gmelina arborea Wood |
| title_full | Chemical and Mechanical Characterization of Thermally Modified Gmelina arborea Wood |
| title_fullStr | Chemical and Mechanical Characterization of Thermally Modified Gmelina arborea Wood |
| title_full_unstemmed | Chemical and Mechanical Characterization of Thermally Modified Gmelina arborea Wood |
| title_short | Chemical and Mechanical Characterization of Thermally Modified Gmelina arborea Wood |
| title_sort | chemical and mechanical characterization of thermally modified gmelina arborea wood |
| topic | High-Energy Multiple Impact (HEMI) Resistance to Impact Milling (RIM) Thermal modification Static Bending |
| url | https://journals.uni-lj.si/les-wood/article/view/12104 |
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