Abstract The objective of this study was to promote the adhesion waterborne and solvent-borne coatings [polyurethane (PU) alkyd] on wood surfaces by silane nanofilm formation means sol-gel processes. Tetraethoxysilane glycidoxypropyltrimethoxysilane served as materials. silane-based materials improved strength. positive effects can be explained changes in surface chemistry induced process. High-resolution X-ray photoelectron spectroscopy (XPS) showed an increase -C-H -C-C bonds a decrease...

The effect of dielectric barrier discharge (DBD) plasma treatment was studied on the surface characteristics and coating performance transparent epoxy resin particleboard (PB) medium-density fiberboard (MDF). performed at three energies (10, 15, 20 kW) distances from nozzle 20, 30 mm). Analyzing samples by Fourier transform infrared (FTIR) spectroscopy X-ray photoelectron (XPS) indicated changes their chemical structure means treatment. contact angle study showed a significant increase in...

The present study is aimed at the effect of heat treatment on nanosilver-impregnated Populus nigra, Fagus orientalis, and Abies alba to find out nail screw withdrawal resistance. Treatments included control, heat-treated, nano-silver-impregnated heattreated specimens. Empty-cell process was used for impregnation with a 200 ppm aqueous dispersion silver nanoparticles size range from 10 80 nm under 3 bars in pressure vessel 20 minutes. For treatment, both seasoned heat-treatment specimens were...

The potential use of nanoclay was examined to modify fluid transfer properties medium density fiberboard (MDF).For this, Na + montmorillonite (Na MMT) added urea formaldehyde resin produce MDF.Then, the air permeability and mass diffusivity MDF were evaluated.Scanning electron microscope (SEM) images X-ray diffraction (XRD) confirmed a dispersion exfoliation MMT in modified MDF.The presented systematic decrease with increasing amount.This reduction agreed simple ''tortuous path'' model.The...

Inter-tracheid and cross-filed pit specifications in compression wood opposite of Norway spruce (Picea abies) were determined. Fewer pits a smaller size aperture diameter observed wood. In contrast to the uniseriate arrangement bordered pairs wood, both biseriate circular view slit-like was often SEM images showed number helical fissures on tracheid walls along microfibril angle S2 layer. The cross-field dominantly piceoid but sometimes cupressoid occasionally taxodioid, whereas they mostly...

This research investigates the effect of plasma treatment with air, nitrogen (N2), and carbon dioxide (CO2) gases on performance waterborne (acrylic) solvent-borne (polyester) coated fir (Abies alba M.) wood samples. The properties plasma-coated samples were analyzed before after exposure to accelerated weathering compared those untreated solely treated ones. According pull-off testing, coating adhesion was considerably improved by treatment, obvious differences observed between different...

Abstract The surface color change of compression wood in spruce (Picea abies L.) and tension poplar (Populus nigra due to drying was investigated using CIE LAB CIELCh colorimetry techniques. results showed that the lighter, yellower, less red, more statured with a deeper hue after drying. Similar changes were also seen wood, except it yellow dry condition. (ΔE) found be remarkable than wood. Overall, difference colorimetric parameters between reaction woods their corresponding normal...

The biometric, density, and microscopic features of Parrotia persica species were investigated in this work. Three completely healthy P. trees randomly felled. discs 5 cm thickness cut at three height levels (at breast height, 3 m, 4.5 m) each stem. test specimens sequentially taken from pith to bark. biometric characteristics the fiber their density analyzed. studied according IAWA List Hardwoods. It was found that all factors decreased with increasing tree base top. In contrast, these also...

In this research, we used Pistacia atlantica gum during cooling phase of oil-heat treatment poplar wood (Populus deltoids) to improve its resistance the white-rot fungus Trametes versicolor and growth mold Penicillium expansum. Thermal modification was carried out using rapeseed oil at 180 °C, 200 °C 220 for 2 hours 4 hours. The modified specimens were then directly cooled in containing 0 %, 5 % 10 (w/w) 25 30 minutes. chemical constituents essential extracted with a Clevenger type...

This report discusses the biometry and microscopic features of Crataegus azarolus wood fibers. A tree was selected cut from gardens Neka city (Mazandaran province). At a breast height, 2.5 m 3.5 three 5 cm thick disks were prepared in transverse direction, test samples evaluated sequentially 2 x long by 3 pith to bark. The anatomical properties C. studied using light microscope. Wood are as follows: diffuse-porous with multiple vessel grouping radial direction (in most cases), homogenous...

The potential use of nanotechnology was employed to accurately determine the role reverse temperature gradient as a driving force for moisture transfer in wood during low-temperature convective drying process. Poplar boards treated with nano-silver (nano-Ag) particle suspension were conventionally dried at constant mild condition. In contrast untreated boards, developed nano-Ag-treated boards; i.e., greater value core compared surface within due distinct thermal conductivity nanoparticles....

e retarding ect of organosilane water soluble nanomaterials (nano-zycosil and nano-zyco l) on vapor di usion through poplar wood (P.nigra) was evaluated in comparison with that clear coatings (sealer nitrocellulose lacquer polyester lacquer) using cup sorption methods.Two drying methods were applied to dry the -coated substrates: oven at temperature 103 ± 2 °C for 24 h.and climatically 25 relative humidity 65% 20 minutes.e results showed both coating materials decreased rate wood.e sealer...

In this study, the effect of wollastonite on mechanical, physical, and morphological properties composites made sesame stem (Sesamum indicum L.) gypsum was investigated. The mixing ratio as a lignocellulosic material with at three levels (10:90, 20:80, 30:70) (0%, 5%, 10%, based dry weight cement) were considered variables. Fire resistance (weight loss) tested according to ISO 11925-3 DIN EN 634-1 two specifications for mechanical physical properties. Microstructural evaluated by scanning...

The potential use of organosilane nanomaterials (nano-zycosil and nano-zycofi l) for improving the weathering resistance poplar wood was evaluated in comparison to common clear coatings (nitrocellulose polyester lacquer).A 250 μm coating layer applied by an automatic fi lm applicator at speed 150 mm/s.The coated specimens were exposed a 1000 W xenon arc light source 65 % relative humidity temperature 20 ºC inside weather-o-meter 1440 hrs.Among materials, nano-zycosil showed best performance...

This study investigated the effect of cutting conditions effects on sound level and surface quality in softwood hardwood. The emission caused by process (band saw) as well roughness topography wood samples were evaluated. A direct relationship was found between density, moisture content, feeding rate, dimensions samples. Straight less than a curved direction. protective earmuffs very significant, reducing from 88 dB to 38 dB. results showed that with increasing density samples, decreased,...