- All Journals
- Al-Qadisiyah University
- Basrah University
- Kirkuk University
- Mosul University
- The Iraqi Borad for Medical Specialization
- University of Anbar
- University of Technology
- Al Mustafa University
- Al-Zahraa University for Women
- Alnoor University
- Kunooz University
- Misan University
- Ninevah University
- Tikrit University
- University of Al-Hamdaniya
- University of Kerbala
Softening and Bending of Black Poplar (Populus nigra L.) Wood with Chemicals | ||
| Journal of Tikrit University For Agriculture Sciences | ||
| Article 1, Volume 15, Issue 4, 2015, Pages 15-20 | ||
| Author | ||
| Younis H. Suleman | ||
| Abstract | ||
| Black Poplar (Populus nigra L.) wood boards (0.8 X 10.0 X 40.0 cm dimensions) were treated with different chemicals; Aqueous solutions of Ammonia (NH3) 10%, Sodium hydroxide (NaOH) 1% and 5%, Urea (CH4N2O) 25%, and water (H2O) at a temperature of (21-70oC) for (1-24 hours) for bending to a desired shapes. The absorption of chemicals by boards varied with the chemical structure of the used chemicals, treatment temperature and treatment time. The highest absorption of chemicals by wood boards was with aqueous ammonia (NH3) 10%, then 5% and 1% Sodium hydroxide (NaOH), followed by Urea 25% and water. The treatment temperature increase was effective in improving the absorption of applied chemicals in the case of NH3 10% and NaOH 1%. The concentration of the chemical (NaOH) also affected the absorption; lower concentration of NaOH (1%) was better than the concentration of NaOH (5%) after one hour of treatment. The bending of wood boards to a desired shape (half circle) achieved at a satisfied level to the local market need with NH3 10%, and with NaOH (1% and 5%) to a good level. The samples treated with Urea 25% and water failed for bending. | ||
| Keywords | ||
| poplar; wood; Sodium hydroxide; Ammonia; urea; Water; softening and bending; Populus nigra L; NaOH | ||
|
Statistics Article View: 30 PDF Download: 2 |
||