Your search resulted in 415 documents. Displaying 25 entries per page.
Decay resistance of wood treated with bio-friendly preservative systems
2016 - IRG/WP 16-30698
Due to more restrictive toxicological requirements and increased ecological awareness of consumers, wood preservatives containing biocides are no longer desired on the market. Therefore, research on new environmentally friendly formulations is of great importance. One of the possible solutions is to develop new preservatives based on natural substances, which are harmless to humans, animals and th...
B Mazela, G Cofta, W Perdoch, L Ross Gobakken, P Kwaśniewska-Sip
Resistance of heat treated Ash wood under steam pressure: rot fungi, soil micro-organisms and termites
2016 - IRG/WP 16-40724
Thermal modification processes have been developed to increase the biological durability and dimensional stability of wood. The aim of this paper was to study the influence of ThermoWood® treatment intensity on wood decay resistance improvement against soil-inhabiting micro-organisms, brown/white rots and termite’s exposures. All of the tests were carried out in the laboratory with two differen...
K Candelier, S Hannouz, M-F Thévenon, D Guibal, P Gérardin, M Pétrissans, R Collet
Modifying wood with paraffin wax emulsion impregnation and thermal modification: hydrophobization effect and mechanism of the combined treatment
2016 - IRG/WP 16-40726
The aim of this study was to enhance the water repellency of wood by a combined treatment of paraffin wax emulsion (PWE) impregnation and thermal modification. Two different treating procedures were used to modify the southern pine (pinus spp.). One is first PWE impregnation and then thermal modification, another is first thermal modification and then PWE impregnation. The treated samples were imm...
Wang Wang, Jinzhen Cao, Cong Chen
Fabrication and characterization of MicroPCMs filled wood-plastic composites: Effects of polyethylene glycol on melamine–formaldehyde shell material
2016 - IRG/WP 16-40728
Microencapsulated phase change materials (MicroPCMs) containing dodecanol were fabricated using melamine-formaldehyde (MF) or polyethylene glycol 200 modified melamine-formaldehyde (PMF) resin as the shell materials by in situ polymerization. Wood flour/high-density polyethylene (WF/HDPE) composites with MF shell MicroPCMs (MF-MicroPCMs) or PMF shell MicroPCMs (PMF-MicroPCMs) were prepared, respec...
Xi Guo, Jinzhen Cao
The durability of natural and thermomodified black poplar wood and Scots pine sapwood after two years of external exposition
2016 - IRG/WP 16-40730
Natural biological durability of many European wood species is considered to be relatively small, particularly in a ground contact conditions. This is due to the exposure of the wood to the range of biological and atmospheric destructive factors. This may to limit the scope of application of the wood of these species, particularly in construction. The biocides are often used for wood protection in...
A Fojutowski, A Kropacz, A Noskowiak
Formation of hydrophobic wood surface by means of thermal treatment and surface modification with alkyl ketene dimer (AKD)
2016 - IRG/WP 16-40738
One of the major shortcomings of wood-based materials compared to technical materials is attributed to their poor dimensional stability in changing climates and in contact with liquid water. Heat treatment induces chemical change with a consequent decreasing of reactivity of the material showing unwanted surface inactivation. Alkyl ketene dimer (AKD) is a widely used sizing agent in papermaking, w...
T Lovaglio, T Meints, L Todaro, W Gindl-Altmutter
Optimising wood chemical modification with lactic acid oligomers by screening of processing conditions and chemical additives
2016 - IRG/WP 16-40741
Oligomer systems based on lactic acid (OLA), were impregnated in wood and polymerised in-situ by heat treatment to improve the properties of the treated wood especially regarding anti-swelling efficiency (ASE), hygroscopicity, water leaching resistance and durability. This article relates the optimisation of the heat treatment conditions and the consideration of selected chemicals for improvement ...
C Grosse, M-F Thévenon, M Noël, P Gérardin
Durability of Thermally Modified Engineered Wood Products
2016 - IRG/WP 16-40745
In this study, rated plywood, oriented strand board (OSB), laminated strand lumber (LSL), and laminated veneer lumber (LVL) were thermally modified as a post-treatment at 140 °C, 150 °C, 160 °C, 170 °C, and 180 °C using a closed, pressurized treatment method. Eastern larch OSB manufactured from heartwood and sapwood was also thermally modified as a post-treatment at 160 °C and 180°C. All ...
H M Barnes, M D Aro, A Rowlen
The influence of log soaking temperature and thermal modification on the properties of birch veneers
2016 - IRG/WP 16-40749
In veneer manufacture the logs are routinely soaked in heated water baths in order to soften the wood prior to peeling. The temperature of the water may vary greatly between batches; however, the influence of log soaking temperature on veneer properties has had little research attention. Uncontrolled moisture is known to cause problems in wood-based materials, while thermal modification offers a m...
S Källbom, K Laine, M S Moghaddam, A Rohumaa, K Segerholm, M Wålinder
Chemical, physical-mechanical characterization and durability of thermally modified beech and ash wood by thermo-vacuum process (Termovuoto)
2016 - IRG/WP 16-40758
The paper illustrates part of the results from the CIP Eco-innovation project “Thermo-vacuum: new process for new generation of thermally modified wood”. The project is part of the 7th Framework Programme for European Research and Technological Development, and thermo-vacuum modified wood is already on the European market. The project was selected by the European Commission, EASME Agency, as "...
M Jebrane, I Cuccui, O Allegretti, N Terziev
Effect of insitu polymerization on practical properties of heat treated wood
2016 - IRG/WP 16-40763
This research was conducted to investigate the effect of combined modification; heat treatment and impregnation with styrene monomer on physical and mechanical properties of poplar wood (Populus deltoides). Test samples were grouped in six levels of control, wood polymer made from styrene, heat treatment at 170 ºC and 200ºC and combined modification; first hat treated at 170 ºC and 200ºC and t...
M Ghorbani, M Mohseni Shaktaei
Accelerated weathering and fungal resistance of wood modified with isopropenyl acetate
2016 - IRG/WP 16-40764
Chemical modification of Rubberwood (Heveabrasiliensis Müll.Arg) with isopropenyl acetate (IPA) in presence of anhydrous aluminum chloride and iodine as catalysts was carried out. Modified wood surfaces were exposed to UV light source in an accelerated weathering tester to evaluate UV resistance. Anti-swelling efficiency (ASE) and fungal resistance of modified wood were also evaluated. Modified w...
G B Nagarajappa, K K Pandey
Environmentally Sustainable Method of Termite Management using a baiting system: A case study in the Philippines
2016 - IRG/WP 16-50317
Environment and sustainability are key words for achieving product and business success. Use of chemicals in human vicinity such as homes and buildings are on the increase, thanks to a growing consciousness on pests. Using chemical insecticide is the main stay to counter these pests, but its role in environment is being scrutinized.Insect baiting technology has proven its success around the world ...
P Dhang
Development of Wood Modification – High melting point wax and hot oil treatments
2016 - IRG/WP 16-40768
This study covers an introduction to the projects where new facilities were created for developing wood modification. In this new research environment it is possible to treat wood with versatile equipment. First modifications with this equipment are going to be done in high temperature and pressure using high melting point waxes and hot oils.
Earlier studies, tests and commercial products show...
H Turunen, L Linkosalmi, J Peura, O Paajanen
Wood Protection and Environmental Performance of Products - Impacts COST Action FP1407 Aims to Bring
2016 - IRG/WP 16-50323
Though many aspects of wood modification (chemical, thermal, impregnation) treatments are known, the fundamental influence of the process on product performance, the environment, and end of life scenarios remain unknown. To contribute to the low-carbon economy and sustainable development, it is essential to integrate interactive assessment of process parameters, developed product properties, and e...
A Kutnar
A review on prediction methods of wood natural durability
2017 - IRG/WP 17-10892
Natural durability of timber may be defined as “inherent ability of timber to attack by wood destroying organisms (bacteria, fungi, insects, marine borers) without preservative treatment. On the base of biological tests, EN-350-2 standard (Afnor, 1994), describe the classification of wood species according to their natural durability. But these specifications are not adapted in the case of wood ...
N Amusant, C Flora, J Beauchène, E Houël, C Duplais
Comparison of 1H qNMR and NIR spectroscopic methods to predict heartwood decay resistance in Dicorynia guianensis Amsh
2017 - IRG/WP 17-20601
Dicorynia guianensis is by far the most exploited wood in French Guiana, as it is an abundant tree species associated with good technological properties. However, the decay resistance of D. guianensis wood against lignivorous fungi pathogens is sometimes variable. Therefore, the development of tools to predict the decay resistance of D. guianensis heartwood is relevant in wood science and agrofore...
C Flora, G Frédéric, M-F Thevenon, Y Estevez, C Duplais, N Amusant
Overview of the treated wood quality control program in the United States with the recent challenges and advances
2017 - IRG/WP 17-20616
In the past two decades, there have been significant and rapid changes in wood protection technologies for residential applications which have moved away from long established heavy duty metal oxide based products such as chromated copper arsenate (CCA). The successor generation of wood protection systems usually contain copper as the primary biocide, in combination with carbon-based co-biocides s...
L Jin
Efficacy of Erythropleum suaveolens (potrodom) and Distemonanthus benthamianus (bonsamdua) water extractives on the durability of five Ghanaian less used timber species of varying perviousness and retentiveness
2017 - IRG/WP 17-30705
Conventional wood preservatives are not only toxic to target bio-deterioration organisms but also to humans, other organisms and the environment. In an effort to find preservatives that are less toxic or non-toxic to man, other organisms and the environment, efficacy of branch bark and heartwood water extracts (0.65 g/ml) of Erythropleum suaveolens (potrodom) and Distemonanthus benthamianus (bonsa...
A Asamoah, K Frimpong-Mensah, C Antwi-Boasiako
Bio-friendly wood protection systems - resistance to mould and blue-stain fungi
2017 - IRG/WP 17-30713
With stricter restrictions on the use of biocides and increasing environmental awareness there is a pronounced need for effective bio-friendly protection systems in the wood preservative and wood coating industry. One of the possible pathways is to exploit and utilize natural substances with active biological effects. Silanes, caffeine, natural oils and potassium carbonate were chosen as compounds...
L Ross Gobakken, W Perdoch, B Mazela, P Kwaśniewska-Sip, G Cofta
Weathering protection of European hardwoods through double modification
2017 - IRG/WP 17-30715
Beech and poplar were thermally modified, treated with melamine resin and both treatments were combined. The weathering performance (cracks and general appearance) of modified beech and poplar was assessed in natural weathering and correlated to material properties such as work in bending (WB) and Brinell hardness. In addition, the equilibrium moisture content after exposure of 12 months and subse...
G Behr, A Gellerich, S Bollmus, H Militz
Effects of heat treatment on sound absorption coefficients in nanosilver-impregnated and normal solid woods
2017 - IRG/WP 17-40770
Effects of impregnation with silver nano-suspension as well as heat-treatment on sound absorption coefficients (AC) were studied in tangential direction of five different solid woods based on their importance. AC was measured at two frequencies of 250 and 500 Hz. A 400 ppm nanosuspension was used for the impregnation; silver nanoparticles had a size range of 30-80 nm. Based on the obtained results...
A Esmailpour, J Norton, H R Taghiyari, H Zolfaghari, S Asadi
Commercialisation of DMDHEU Modified Wood in Australasia
2017 - IRG/WP 17-40772
While there is an increasing volume of data for the impregnation and curing of timber using dimethylol dihydroxyethyleneurea (DMDHEU) on species such as Scots Pine, Beech, Slash Pine and Spotted gum, there is limited information available on the impact of the modification process on the performance of Pinus radiata (referred to hence forth as Radiata pine). The variability within material and spec...
B R Derham, T Singh, H Militz
Dimensional Stability of Melamine Formaldehyde-Treated Southern Pine
2017 - IRG/WP 17-40774
The objective of this preliminary study was to evaluate the influence of different levels of melamine formaldehyde (MF) and curing cycle on the dimensional properties of southern pine. Thirty samples for each combination of treatment and curing regimen plus untreated controls and controls subjected to the same curing regimen were tested. Shrinkage/swelling coefficients showed that up to 60% ASE c...
H M Barnes, L S Sites, T S F A França, M G Sanders, F J N França
Effect of Particle Size on Wax Distribution in Paraffin Wax Emulsion Impregnated Wood
2017 - IRG/WP 17-40779
Paraffin wax emulsion impregnation has been a common eco-friendly approach for improving water repellency of wood. In this study, southern pine (Pinus spp.) and Scots pine (Pinus sylvesteris L.) samples were impregnated with paraffin wax emulsions of different solid contents and particle sizes, and then the time domain nuclear magnetic resonance (TD-NMR) was used to elucidate the influence of part...
Wang Wang, Jinzhen Cao, Yiheng Huang