Thermal treatment and its effect on the gas permeability of Populus nigra
In this investigation, the effect of thermal treatment on gas permeability of Populus nigra was studied. The boards with 5×5×15 cm in dimensions were steamed under average pressure 2-3 bar. The treatments were carried out at 4 temperatures of 120, 140, 160 and 180 ºC for 1, 2 and 3-hour. After therm...
| Main Authors: | , , , |
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| Format: | Article |
| Language: | fas |
| Published: |
Iranian Scientific Association of Wood and Paper Industries
2012-01-01
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| Series: | Iranian Journal of Wood and Paper Industries |
| Subjects: | |
| Online Access: | http://www.ijwp.ir/article_11519_031837439a166744b3e7c04169a8a05a.pdf |
| Summary: | In this investigation, the effect of thermal treatment on gas permeability of Populus nigra was
studied. The boards with 5×5×15 cm in dimensions were steamed under average pressure 2-3
bar. The treatments were carried out at 4 temperatures of 120, 140, 160 and 180 ºC for 1, 2
and 3-hour. After thermal treatment, 2 cylindrical specimens with 18mm diameter and 10mm
length parallel to grain were prepared from each board, and their transverse permeability was
measured. The results showed that thermal treatment did not have any effect on gas
permeability at 120 and 140 ºC but it reduced the gas permeability at 160 and 180 ºC. There
was not any significant difference in %95 confidence level between different periods of
thermal treatment. |
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| ISSN: | 2008-9066 2423-3242 |