عنوان مقاله [English]
نویسنده [English]چکیده [English]
Effect of tobacco plant stalk on the mechanical and Physical properties of particleboard
Using of agriculture residues instead of wood as raw material in lignocellulosic industry including particleboards is effective strategy in protection of forests. One of agricultural residues is tobacco stalks which after harvesting of leaves their stalks mostly ploughed into the soil or burnt in the field by farmers, but their stalks are good sources of fibers.
The particle boards have been fabricated with mixture of 0% tobacco stalk , 25% tobacco stalk and 75% forestry wood chips , 50% tobacco stalks and 50% forestry wood chips , 75% tobacco stalks and 25% forestry wood chips and 100 percent of forestry wood chip. The Urea-formaldehyde resin content was permanent and 10% of dried weight of woodchips, but two press times 4 and 6 minute was employed.
The result showed that with increasing of tobacco stalks, the MOR, MOE, resistance of water absorption and thickness swelling increased significantly (P>0.01) and it is because of higher compression ration of tobacco stalks. But in contrast with increasing of tobacco stalks the internal bonding decreases significantly (P>0.05) and it can be attributed to low density and high aspect ratio of tobacco fibers. Meanwhile with increasing press time from 4 to 6 minutes the mechanical properties and internal bounding decreases but water absorption and thickness swelling doesn’t get any changes.
Particleboard, Tobacco stalk, Mechanical and physical properties, Press time