effects were studied of 200 ppm silver and copper nano-suspensions, with size range from 20 to 80 nm, on the hardness of particleboards produced at an industrial scale at the iran-choob factory, iran. metal nano-suspensions were added to the mat at two levels of 100 and 150 milli-liters/kg dry weight wood particles, and the results were compared with those of the control panels. results showed ...

worldwide, asbestos fibers utilized in fiber cement boards, have been recognized as harmful materials regarding the public health and environmental pollutions. these concerns motivate the researchers to find the appropriate alternatives to substitute the asbestos material towards the sustainability policies. in this paper, the applicability of asbestos replacement with three types of agricultur...

To improve the bonding strength between adhesive and enhance the performance of composite board made from corn stalk rinds, a method for preparing three-layer composite boards was proposed. Accordingly, corn stalk rinds with the epidermis removed, were used as the core layer, while crushed aggregates from the epidermis were used as the surface layer of the composite board. Single-factor and ort...

Fe₃O₄/wood fiber composites are prepared with a green mechanical method using only distilled water as a solvent without any chemical agents, and then a binderless composite board with high mechanical properties is obtained via a hot-press for electromagnetic (EM) absorption. The fibers are connected by hydrogen bonds after being mechanically pretreated, and Fe₃O₄ nanoparticles (NPs) are attache...

effect of nanosilver (ns) on the heat-transferring rate to the core section of medium density fiberboard (mdf) mat was studied here. a 400 ppm aqueous nanosilver suspension was used at three consumption levels of 100, 150, and 200 ml/kg, based on the weight of dry wood fibers; the results were then compared with the control mdf panels. the size range of nanosilver was 30-80 nm. results showed t...

We have designed, produced, and experimentally characterized 2.7 mm thick composite panels having negative refractive index between 8.4 and 9.2 GHz. The composite metamaterial is fabricated using conventional commercial multilayer circuit-board lithography; three-dimensional physical (as opposed to electromagnetic) structure is introduced by the use of vias to form sections of the scattering el...

Renovation work on train station platforms requires removing the protective covering of half-finished and then putting it back again at end each day. However, time allotted for renovation in buildings is limited. Reducing coverings therefore expected to help shorten working time. We developed a light, high-strength plate consisting resin-impregnated glass cloth, foam, thin steel plate. This pap...

Rubberwood (Hevea brasiliensis Muell. Arg) is underutilized in most developing countries but has potential to be a solution the shortage of wood for pulp, paper and composite products at end its production cycle. Determining understanding fibre properties (fibre dimensions morphology) key utilization pulp as well composites. This study assessed effect age on rubberwood. Samples four ages (10, 1...