Modification of water vapor diffusion in poplar wood (Populus nigra L.) by steaming at high temperatures

Maedeh SAYAR; Asghar TARMIAN

Makale detayları

Modification of water vapor diffusion in poplar wood (Populus nigra L.) by steaming at high temperatures

Yazarlar:

Maedeh SAYAR | Asghar TARMIAN

Yayıncı:

TUBITAK

Dergi:

Turkish Journal of Agriculture and Forestry 2013 Vol.37 Issue 4, pp.511-515

Belge Tipi:

Makale

Yayın Tarihi:

3/2013

Belge Dili:

Türkçe

Document ID (Org No.):

2000807646

Sıklık:

İki Aylık

eISSN:

1303-6173

pISSN:

1300-011X

Anahtar kelimeler:

Özet:

 

In this investigation, the effect of steaming on the water vapor diffusion coefficient of poplar wood (Populus nigra L.) was studied. Boards with dimensions of 50 × 50 × 150 (W × H × L) mm3 and average moisture content of 12% were steamed at temperatures of 120, 140, 160, and 180 °C for 1, 2, and 3 h. The diffusion coefficients were then measured based on Fick's law of diffusion in steady-state conditions using the cup method. Results showed that the steaming of poplar wood at all mentioned temperatures can decrease the water vapor diffusion coefficient. However, no further improving effect was caused by increasing the steam temperature or duration. Some significant wood anatomical and chemical changes like cell wall collapse and holocellulose hydrolysis give some explanations for the improving effect of steaming on the diffusion coefficient. Overall, steaming at temperature of 120 °C for 1 h as the best treatment is recommended to modify the water vapor diffusion coefficient.

 

In this investigation, the effect of steaming on the water vapor diffusion coefficient of poplar wood (Populus nigra L.) was studied. Boards with dimensions of 50 × 50 × 150 (W × H × L) mm3 and average moisture content of 12% were steamed at temperatures of 120, 140, 160, and 180 °C for 1, 2, and 3 h. The diffusion coefficients were then measured based on Fick's law of diffusion in steady-state conditions using the cup method. Results showed that the steaming of poplar wood at all mentioned temperatures can decrease the water vapor diffusion coefficient. However, no further improving effect was caused by increasing the steam temperature or duration. Some significant wood anatomical and chemical changes like cell wall collapse and holocellulose hydrolysis give some explanations for the improving effect of steaming on the diffusion coefficient. Overall, steaming at temperature of 120 °C for 1 h as the best treatment is recommended to modify the water vapor diffusion coefficient.

Makale detayları

Modification of water vapor diffusion in poplar wood (Populus nigra L.) by steaming at high temperatures

Yazarlar:

Maedeh SAYAR | Asghar TARMIAN

Yayıncı:

TUBITAK

Dergi:

Turkish Journal of Agriculture and Forestry 2013 Vol.37 Issue 4, pp.511-515

Belge Tipi:

Makale

Yayın Tarihi:

3/2013

Belge Dili:

Türkçe

Document ID (Org No.):

2000807646

Sıklık:

İki Aylık

eISSN:

1303-6173

pISSN:

1300-011X

Key words: Poplar wood

steaming

water vapor diffusion

Sayı

Makale detayları

Modification of water vapor diffusion in poplar wood (Populus nigra L.) by steaming at high temperatures

Yazarlar: Maedeh SAYAR | Asghar TARMIAN

Yayıncı: TUBITAK

Dergi: Turkish Journal of Agriculture and Forestry 2013 Vol.37 Issue 4, pp.511-515

Belge Tipi: Makale

Yayın Tarihi: 3/2013

Belge Dili: Türkçe

Document ID (Org No.): 2000807646

Sıklık: İki Aylık

eISSN: 1303-6173

pISSN: 1300-011X

Key words: Poplar wood

steaming

water vapor diffusion

Sayı

Yazarlar:

Maedeh SAYAR | Asghar TARMIAN

Yayıncı:

TUBITAK

Dergi:

Turkish Journal of Agriculture and Forestry 2013 Vol.37 Issue 4, pp.511-515

Belge Tipi:

Makale

Yayın Tarihi:

3/2013

Belge Dili:

Türkçe

Document ID (Org No.):

2000807646

Sıklık:

İki Aylık

eISSN:

1303-6173

pISSN:

1300-011X