Influence of Thermal Modification in Nitrogen Atmosphere on the Selected Mechanical Properties of Black Poplar Wood (<i>Populus nigra</i> L.)
The thermal modification of wood in a nitrogen atmosphere shapes the functional properties of wood. The aim of this research was to determine the influence of different levels of temperature and the duration of thermal modification on the mechanical properties of the black poplar (<i>Populus n...
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MDPI AG
2022-11-01
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| Online Access: | https://www.mdpi.com/1996-1944/15/22/7949 |
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| author | Olga Bytner Michał Drożdżek Agnieszka Laskowska Janusz Zawadzki |
| author_facet | Olga Bytner Michał Drożdżek Agnieszka Laskowska Janusz Zawadzki |
| author_sort | Olga Bytner |
| collection | DOAJ |
| description | The thermal modification of wood in a nitrogen atmosphere shapes the functional properties of wood. The aim of this research was to determine the influence of different levels of temperature and the duration of thermal modification on the mechanical properties of the black poplar (<i>Populus nigra</i> L.). Black poplar was thermally modified in nitrogen atmosphere in the temperature range from 160 °C to 220 °C (6 levels) for 2 h to 8 h (4 levels), resulting in a total of 24 treatments. The effect of these treatments on compressive strength parallel to the grain (CS), modulus of rupture (MOR), and modulus of elasticity during bending (MOE) were analyzed. Thermal modification influenced the mechanical properties of black poplar wood. After thermal modification occurred in a nitrogen atmosphere, an increase in compressive strength was noticeable for all variants of black poplar wood modification. The highest 16% increase in CS was obtained for the modification carried out at the temperature of 160 °C and for 2 h. An increase was also found for MOE when modified under mild conditions, while a decrease occurred for variants at higher temperatures, i.e., for 200 °C and 220 °C. The study showed that for all modification variants, there was a decrease in MOR alongside the increase in modification temperature and time. |
| first_indexed | 2024-03-09T18:13:01Z |
| format | Article |
| id | doaj.art-a10481b1e3c843a9848a7f51ba95c046 |
| institution | Directory Open Access Journal |
| issn | 1996-1944 |
| language | English |
| last_indexed | 2024-03-09T18:13:01Z |
| publishDate | 2022-11-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Materials |
| spelling | doaj.art-a10481b1e3c843a9848a7f51ba95c0462023-11-24T09:01:37ZengMDPI AGMaterials1996-19442022-11-011522794910.3390/ma15227949Influence of Thermal Modification in Nitrogen Atmosphere on the Selected Mechanical Properties of Black Poplar Wood (<i>Populus nigra</i> L.)Olga Bytner0Michał Drożdżek1Agnieszka Laskowska2Janusz Zawadzki3The Institute of Wood Sciences and Furniture, 159 Nowoursynowska St., 02-776 Warsaw, PolandThe Institute of Wood Sciences and Furniture, 159 Nowoursynowska St., 02-776 Warsaw, PolandThe Institute of Wood Sciences and Furniture, 159 Nowoursynowska St., 02-776 Warsaw, PolandThe Institute of Wood Sciences and Furniture, 159 Nowoursynowska St., 02-776 Warsaw, PolandThe thermal modification of wood in a nitrogen atmosphere shapes the functional properties of wood. The aim of this research was to determine the influence of different levels of temperature and the duration of thermal modification on the mechanical properties of the black poplar (<i>Populus nigra</i> L.). Black poplar was thermally modified in nitrogen atmosphere in the temperature range from 160 °C to 220 °C (6 levels) for 2 h to 8 h (4 levels), resulting in a total of 24 treatments. The effect of these treatments on compressive strength parallel to the grain (CS), modulus of rupture (MOR), and modulus of elasticity during bending (MOE) were analyzed. Thermal modification influenced the mechanical properties of black poplar wood. After thermal modification occurred in a nitrogen atmosphere, an increase in compressive strength was noticeable for all variants of black poplar wood modification. The highest 16% increase in CS was obtained for the modification carried out at the temperature of 160 °C and for 2 h. An increase was also found for MOE when modified under mild conditions, while a decrease occurred for variants at higher temperatures, i.e., for 200 °C and 220 °C. The study showed that for all modification variants, there was a decrease in MOR alongside the increase in modification temperature and time.https://www.mdpi.com/1996-1944/15/22/7949bending strengthcompressive strengthmodulus of elasticitythermal modificationnitrogen atmospherepoplar wood |
| spellingShingle | Olga Bytner Michał Drożdżek Agnieszka Laskowska Janusz Zawadzki Influence of Thermal Modification in Nitrogen Atmosphere on the Selected Mechanical Properties of Black Poplar Wood (<i>Populus nigra</i> L.) Materials bending strength compressive strength modulus of elasticity thermal modification nitrogen atmosphere poplar wood |
| title | Influence of Thermal Modification in Nitrogen Atmosphere on the Selected Mechanical Properties of Black Poplar Wood (<i>Populus nigra</i> L.) |
| title_full | Influence of Thermal Modification in Nitrogen Atmosphere on the Selected Mechanical Properties of Black Poplar Wood (<i>Populus nigra</i> L.) |
| title_fullStr | Influence of Thermal Modification in Nitrogen Atmosphere on the Selected Mechanical Properties of Black Poplar Wood (<i>Populus nigra</i> L.) |
| title_full_unstemmed | Influence of Thermal Modification in Nitrogen Atmosphere on the Selected Mechanical Properties of Black Poplar Wood (<i>Populus nigra</i> L.) |
| title_short | Influence of Thermal Modification in Nitrogen Atmosphere on the Selected Mechanical Properties of Black Poplar Wood (<i>Populus nigra</i> L.) |
| title_sort | influence of thermal modification in nitrogen atmosphere on the selected mechanical properties of black poplar wood i populus nigra i l |
| topic | bending strength compressive strength modulus of elasticity thermal modification nitrogen atmosphere poplar wood |
| url | https://www.mdpi.com/1996-1944/15/22/7949 |
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