In this work, the adhesive systems used today in European industries of particleboard, medium density fibreboard (MDF) and oriented strand board (OSB) are discussed. The structure MDF OSB markets Europe relation to types adhesives product specifications presented as well. It is noticeable that new for wood-based panels like particleboard fibreboard, known non-furniture markets, growing at a fast rate. was concluded most technological changes concerning applied additives have been realised...

The potential of producing eco-friendly, formaldehyde-free, high-density fiberboard (HDF) panels from hardwood fibers bonded with urea-formaldehyde (UF) resin and a novel ammonium lignosulfonate (ALS) is investigated in this paper. HDF were fabricated the laboratory by applying very low UF gluing factor (3%) ALS content varying 6% to 10% (based on dry fibers). physical mechanical properties fiberboards, such as water absorption (WA), thickness swelling (TS), modulus elasticity (MOE), bending...

The rate and maximum swelling of several North American wood species in 40 organic liquids have been obtained with a computer interfaced linear variable displacement transformer. Since swells very fast some liquids, even at room temperature, this apparatus made it possible to obtain accurate data on the liquids. It was found that many similarities existed between cellulose within various solvent chemical classes. Hence, appears is primary polymer responsible for major amount (...)

The objective of the work was to improve leaching resistance fire-retardant (FR) modified wood by incorporation a thermoset resin. Here, Scots pine (Pinus sylvestris L.) sapwood impregnated with melamine formaldehyde (MF) resin and hydrophilic FRs guanyl-urea phosphate/boric acid vacuum-pressure treatment. Resistance FR-modified evaluated, after conducting an accelerated aging test according European standard EN 84. Inductively coupled plasma analysis showed that MF significantly reduced...

The potential of addition calcium lignosulfonate as an eco-friendly additive with a phenol-formaldehyde (PF) resin, at different ratios, to produce medium-density fibreboards (MDF) acceptable properties, was investigated in this work. were fabricated the laboratory low PF resin percentage (3%, 4%, 5%), while levels varied from 5% 15% (on dry fibres). physical and mechanical properties evaluated, further statistically analysed order determine optimal values content for fulfilling European...

The potential of producing ecofriendly composites from industrial waste fibres, bonded with magnesium lignosulfonate, a lignin-based formaldehyde-free adhesive, was investigated in this work. Composites were produced the laboratory using following parameters: hot press temperature 210 °C, pressing time 16 min, and 15% gluing content lignosulfonate (on dry fibres). physical mechanical properties evaluated compared European Standard (EN) required (EN 312, EN 622-5) common wood-based panels,...

The exterior application of fire-retardant (FR) timber necessitates it to have high durability because the possibility be exposed rainfall. In this study, water-leaching resistance FR wood has been imparted by grafting phosphate and carbamate groups water-soluble additives ammonium dihydrogen (ADP)/urea onto hydroxyl polymers via vacuum-pressure impregnation, followed drying/heating in hot air. A darker more reddish surface was observed after modification. Fourier transform infrared...

This study explored the potential of pulsed electric field (PEF) as an alternative wine-aging method in four Xinomavro red wines with implementation several wood chips (apricot, peach, apple, cherry, acacia, and oak trees). The evolution total polyphenol content (TPC) sensory properties were investigated. Sensory evaluation revealed that PEF treatment increased volatile compound extraction from each chip, thereby enhancing overall quality wines. utilization acacia tree Goumenissa wine led to...

In this work, the brown rot resistance of black pine (Pinus nigra L.) wood, pressure-treated in an autoclave with nano-sized zinc borate and oxide dispersions, was investigated. The two formulations based on have given encouraging results, indicating fungicide effects metal nanoparticles Coniophora puteana. specific, mean weight losses for P. sapwood exposed to fungus (one without one addition a binder) were negligible, that is 0.54% 0.34%, respectively. On contrary, impregnation wood...

The objective of the work was to evaluate efficacy two new polyphosphate-based fire retardants (FRs) and one commercial product named Siriono® on performance physical–mechanical properties medium density fibreboard (MDF) fabricated in laboratory from Scots pine (Pinus sylvestris L.) wood. fibres were treated with aqueous solutions retardants, at 12% loading (dry salt dry wood), bonded a melamine urea formaldehyde (MUF) adhesive. physical mechanical panels assessed using European standards,...

Abstract Acetylation of softwoods has been largely investigated to increase the dimensional stability and biological resistance wood. However, knowledge this technology not applied tropical hardwood species up date. The objective work was study effect acetylation on nine species, from forest plantations in Costa Rica, by applying acetic anhydride three different treatment times (1 h, 2.5 4 h), as well evaluate Fourier-Transform Infrared Spectroscopy (FTIR). Results showed that weight...

Scots pine (Pinus sylvestris L.) sapwood was modified using maleic anhydride (MA) and sodium hypophosphite (SHP) to improve its durability against wood-deteriorating fungi, mechanical strength, fire retardancy (thermal stability). The modification significantly reduced mass loss caused by wood-decaying fungi (Trametes versicolor, Rhodonia placenta, soft rot fungi) due the formation of cross-links between wood, MA, SHP, which limited moisture uptake altered chemical structure wood. On other...

Summary Wood swelling Rate of wood The in organic liquids at elevated temperatures has been investigated with the use Activation energy a computerized linear variable displacement transformer (LVDT). swelled extremely fast high temperatures. rate showed strong dependence on temperature Arrhenius equation which closely obeyed classical equation. This strict

In this research, acetylated wood (Accoya) was tested in ground contact central Greece. After ten years of exposure during a stake test, pine (Pinus radiata) stakes, with 20% acetyl weight gain, were completely intact and showed no visual decay (decay rating: 0). However, the key mechanical properties Accoya wood, that is, modulus elasticity (MOE) rupture (MOR) after 10 contact, significantly reduced by 32.8% 29.6%, respectively, despite an excellent result since evidence fungal attack...