Composite wood products
Homayon Solymani; Abolfazl Kargarfard; Amir Nourbakhsh
Abstract
In this investigation, particleboard manufacturing has been offered considering usage of lignocellulosic residues from recision of pomegranate trees in particleboard production using pomegranate and poplar(P.nigra) wood with 4 different combination (1. 100% of pomegranate wood ...
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In this investigation, particleboard manufacturing has been offered considering usage of lignocellulosic residues from recision of pomegranate trees in particleboard production using pomegranate and poplar(P.nigra) wood with 4 different combination (1. 100% of pomegranate wood 2. 75% of pomegranate wood and 25% of poplar wood 3. 50% of pomegranate wood and 50% of poplar wood 4. 100% of poplar wood as the control sample ) and using 2 resin consumption levels UF (10 & 12 %) and 2 press time levels (4&5 min.). According to these factors, 16 combination samples were totally collected and 3 boards from each treatment totally 48 experimental sample boards were made. The result of physical and mechanical properties were analyzed using Randomized Complete Block experimental Design ( RCBD ). The result of this investigation showed that Modulus of Rupture (MOR) in boards has effectively reduced while increasing the press time. On the other hand , resin consumption content and press time have a direct impression on Modulus of Rupture (MOR) and Modulus of Elastisity (MOE) in boards so that MOR and MOE decreased while 10% resin consumption and increasing the press time. These results also indicated that MOR and MOE of the boards have increased by adding poplar particles to the wood combination for board production. Indeed, Internal Bonding (IB) of boards has modified while 10% resin consumption and increasing the press time but IB has effectively decreased by 12% resin consumption and increasing the press time. Anyway, all the Internal Bonding average values for boards have been higher than the standard level. The results also showed that Thickness Swelling (TS) of boards has increased by adding poplar particles to the wood combination for board production.
Composite wood products
Abdolrahman Hosseinzadeh; Amir Nourbakhsh; Fardad Golbabaei; Abolfazl Kargarfard; Homayon Solimani ashtiani
Abstract
In order to manufacture particleboard from various populus clones species grown in four years short - rotation, eighteen clones from different species of populus grown in "Alborz Research Center" with a control sample of Beech from Caspian Forests totally 19 combination spicement were collected and 3 ...
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In order to manufacture particleboard from various populus clones species grown in four years short - rotation, eighteen clones from different species of populus grown in "Alborz Research Center" with a control sample of Beech from Caspian Forests totally 19 combination spicement were collected and 3 boards from each treatment totally 57 experimental sample boards were produced.The effects of different species and clones of populus on physical and mechanical properties of boards were studied. The results showed that clones P.d 77.51 and P.e.561.41 grown four years had the maximum modulus of repture (MaR). The P.e. 561.41, P.e. vernirubensis showed a high modulus of elasticity (MOE), and internal bonding (IB) was the maximum in P.d. 44.9, P.n. 63.135. The minimum amount of thickness swelling after 2 hours - immersion were belong to P.d. 77.51, P.n. 42.78 and the thickness swelling after 24 hours immersion were belong to P.n. 63.135 , P.e. 42.78. respectively.It has been shown that most of the different populous clones grown four years - rotation, have the higher applicable properties than control sample for particleboard.The results of this study showed that it is possible to use 4-years-old wood of P.e. 561.41, P.d. 77.51, P.e vernirubensis, P.n. 63.135, P.e. 44.9 woods for particleboard manufacture.
