Behbood Mohebby

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Any treatment of fibers can influence properties of medium density fibreboard (MDF). In this research, the effects of hydrothermal treatment on physical and mechanical properties of MDF were studied. Industrial fibers were hydrothermally treated in a stainless steel reactor at 120, 150 and 180 °C for 0, 30 and 90 min as holding time. Test boards were made(More)
This research work aimed at studying the effects of oleothermal modification of fir wood by using combined soybean oil with maleic anhydride (OHT–MA) to achieve lower treatment temperatures and enhance physico-mechanical properties. Wood blocks were oleothermally treated with soybean oil and OHT–MA at five different treatment temperatures (100, 120, 140,(More)
This research was planned to study the influence of reinforcement with metal and woven synthetic nets on the mechanical properties of medium density fiberboard (MDF). Sample boards were manufactured according to common practice. However, reinforcements were placed in the boards at one fourth of their thicknesses. Urea formaldehyde resin was used in the(More)
The Influence of hydrothermal treatment on bond shear strength of beech (Fagus orientalis) wood specimens was studied. Wood samples were treated in a reactor at temperatures of 130 and 150 ∘C for a holding time of 30 minutes. For determining the bond shear strength in treated woods, wood blocks were bonded with urea formaldehyde, polyvinyl acetate and(More)
Chitosan is a natural biopolymer, derived from chitin, which is used for wood modification. Polyethylene glycol (PEG) was reacted with wood to provide possible fixation of the chitosan to wood. Wood blocks were treated with chitosan and PEG, as well as pre-treatment with the PEG at different temperatures and further reaction with the chitosan. The samples(More)
Nano-chitosan was synthesized and reacted with fir wood to study its effects on physical properties. Nano size of the chitosan was initially determined by using the scanning electron microscope (SEM) as well as the zeta meter to confirm nano-structures. The measurements were indicated that the nano-chitosan particles achieved nano-sizes with an average of(More)
Effects of nano-chitosan on physical and mechanical properties as well as bio-resistances of beech and fir wood were investigated in the current research work. nano-chitosan was prepared and used to treat wood due its smaller size and also stability of the solution. Beech and fir wood blocks were treated with chitosan and nano-chitosan as 1 % concentrations(More)
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