Your search resulted in 856 documents. Displaying 25 entries per page.
Water interactions in wood polyesterified with sorbitol and citric acid
2020 - IRG/WP 20-40888
Polyesterifcation of wood with sorbitol and citric acid seems to be a promising chemical wood modification technique that is both low-cost and produced from bio-based chemicals. An interesting aspect of the modification is the interaction of water with the polyesterified wood since the relationship with moisture appears to be unique compared to other wood modification systems. This communication p...
G Beck, A Treu, E Larnøy
Evaluation of chemical densification of three hardwood species through in-situ electron beam polymerization
2020 - IRG/WP 20-40893
Hardwoods are the most suitable species for wood flooring for their appearance as well as their hardness. Yet, improving hardness can provide substantial benefit for the wood flooring market. Chemical densification of wood and in-situ polymerization through electron beam technology was chosen to increase hardness of three hardwoods (Yellow birch (YB) (Betula alleghaniensis Britt.), Sugar maple (SM...
J Triquet, P Blanchet, V Landry
Self-regulating heating cables for conductive heat transfer in pest control
2020 - IRG/WP 20-40895
Pest control by means of conductive heating of wooden elements requires considerable measuring and control efforts in order to avoid overheating of wooden surfaces, damage of structural elements and risk of fire. The usage of self-regulating heating cables might overcome such problems. In laboratory tests and under real conditions the applicability of self-regulating heating cables is tested with ...
J Müller, E Melcher, J Welling
Performance of a water-borne stain on beech, spruce, MDF and OSB improved by plasma pre-treatment
2020 - IRG/WP 20-40897
Coatings are an important part of wood protection, especially for outdoor applications. In order to provide a good protection, protective coatings need to exhibit good adhesion, mechanical resistance, and weathering resistance. Plasma pre-treatments are an established method to increase the performance of existing coatings including those on wood and wood-based substrates. Moreover, plasma deposit...
S Dahle, J Žigon, I Uranjek, M Petrič
Comprehensive protection of timber in seawater
2020 - IRG/WP 20-10970
The hazard of wood in seawater can be divided into two areas: Below the water level, shipworm (Teredo navalis) and gribble (Limnoria lignorum) can attack non-resistant or insufficiently protected wood; above the water level, there is a risk by wood-destroying fungi and, to a lesser extent, insects. In a national project funded by the Deutsche Bundesstiftung Umwelt (DBU, German Federal Environmenta...
E Melcher, J Müller, T Huckfeldt
Sterilization of Large Timbers during Preservative Treatment: How Quickly We Forget
2020 - IRG/WP 20-40902
Air seasoning is a common method of moisture management in utility poles and is done de facto during pole storage prior to treatment. However, extended air drying prior to treatment encourages fungal attack and can facilitate establishment of decay fungi in poles before a protective preservative barrier is applied. This problem can be mitigated by proper air-seasoning methods coupled with heat ste...
G Presley, J Cappellazzi, M Konkler, K Maguire, R Nelson, J J Morrell
Biofinish: A Functional Wood Surface Treatment based on Aureobasidium
2020 - IRG/WP 20-40903
Xyhlo Biofinish is a natural and environmentally friendly wood protection concept based on linseed oil impregnation and a fungal-based coating. It emerged in the late 1990s and has been developed over the past 15 years into an industrially applicable process in the Netherlands. The combination of linseed oil impregnation and a surface treatment with the living fungus Aureobasidium extends the serv...
S Rensink, M Sailer, S Roukens, J Gerber, H van der Mel, K Potgieter, J Spit, R Bulthuis, C Struck, M Bennink
NewSiest-Enhancement of UV stability of thermally modified wood through envelope impregnation with nanobased stabilisers
2020 - IRG/WP 20-40909
Thermal modification is a process which improves the properties of wood, resulting in a material that can be disposed at the end of the product life cycle without presenting an environmental hazard. Thermally modified wood retains as a natural product and the grain, original colour variances and characteristics of wood are still present. However, exposure to daylight causes brightening or greying ...
K Srinivasa, M Petrič
Plasma treatment of wood - a review of 15 years of research in Göttingen
2021 - IRG/WP 21-40913
Wood is an important renewable resource and can be found omnipresent in everyday life. Its natural properties offer numerous advantages regarding physical, mechanical but also aesthetic aspects, but also challenges that one has to address with various modification methods.
Driven by the desire to promote the use of promising new technologies using plasmas, there has been a close research network ...
P Sauerbier, R Köhler, G Avramidis, W Viöl, H Militz
The iron reduction by chemical components of wood blocks decayed by wood rotting fungi
2021 - IRG/WP 21-10979
Brown-rot fungi, a group of wood rotting fungi, is well known to be one of major microorganisms that cause the deterioration of wooden buildings in Japan and have been considered to use chelator-mediated Fenton (CMF) reaction in concert with hydrolytic and redox enzymes for degradation of wood cell wall. CMF can be described as a non-enzymatic degradation system that utilizes hydroxyl radicals pro...
R R Kondo, Y Horikawa, K Ando, B Goodell, M Yoshida
Marine borer resistance of various wood materials in Japan
2021 - IRG/WP 21-10983
Wood resistance against marine borer was intensively studied in the 1940s in Japan, but the research activities on the subject diminished afterward, as the use of wooden marine structures and ships decreased. Today, however, use of wood as a construction material is officially promoted for its environmental benefits. The author started to immerse some wood materials in the seawater pool at PARI ...
M Yamada
Preliminary investigation for preservation method of CLT using non-pressure treatment
2021 - IRG/WP 21-40919
Cross-laminated Timber (CLT) is increasingly being used in residential and non-residential construction around the world, and some of these areas are at high risk of biodeterioration. Addition to moisture management of construction, preservative treatment of CLT may be needed to prevent decay and termite attack in the area. Pressure treatment being most reliable, is not feasible due to the large d...
T Miyauchi, Y Ohashi, J Miyazaki, R Takanashi, H Shibui, S Isaji, T Shigeyama, Y Sugai, A Yamamoto, T Hramiishi, T Mori, H Matsunaga
Treatability of South African-grown Eucalyptus grandis with water-borne copper azole and disodium octaborate tetrahydrate wood preservatives
2021 - IRG/WP 21-40920
This study investigated the treatability of the sapwood and heartwood of sawn Eucalyptus grandis with copper-azole (CuAz) and disodium octaborate tetrahydrate (DOT) water-borne preservatives towards improving its durability for enhanced use in structural solid wood applications. The results obtained showed that, at a moisture content of 12 ± 1%, sawn E. grandis sapwood can be impregnated to a mea...
A A Alade, Z Naghizadeh, C B Wessels
Effect of a Water Repellent Treatment on Moisture Behavior of Three Australian Hardwoods: A Preliminary Report
2021 - IRG/WP 21-40921
Wood is inherently hygroscopic and will sorb moisture either directly from the atmosphere or via capillary action. Moisture can have marked effects on wood properties and repeated wetting and drying creates dimensional changes that lead to physical damage. Exposure to elevated moisture levels also increases the risk of fungal attack.
Wood preservatives have long been used to minimize the risk of ...
B Hassan, J J Morrell, K Wood
Effect of Heat Treatment on Physical and Mechanical Properties of Oriental Beech Wood (Fagus orientalis L.)
2021 - IRG/WP 21-40923
The present study aims to investigate the influence of heat treatment on physical and mechanical properties of Oriental beech wood (Fagus orientalis Lipsky.). Samples were exposed to temperature levels of 130˚C, 160˚C, and 190˚C for 3, 6, and 9 h. Selected physical and mechanical properties including compression strength parallel to grain, compression strength perpendicular to grain, bending st...
M D Ghalehno, D Chu, B N Sheshkal, M Humar, M Bahmani
Chemical composition of agarwood of Aquilaria crassna Pierre ex. Lecomte induced by Basidiomycetes from French Guiana
2022 - IRG/WP 22-10988
Aquilaria trees subjected to stress induce the formation of a transformed wood named agarwood. The formation of agarwood is a plant defense mechanism that occur in complex interactions with environmental microorganisms. Agarwood chemical compounds are mainly chromones and oxygenated sesquiterpenes such as eudesmol, agarospirol, jinkoh-eremol and valerianol, which are valued in perfumery. Its deriv...
C Zaremski, M Ducousso, C Andary, G Michaloud, C Menut, A Zaremski, N Amusant
Effect of furfurylation treatment on the performance of three Canadian wood species
2022 - IRG/WP 22-40925
The demand for exterior wood siding is stagnating in North America, partly due to the perception of consumers, architects and contractors regarding their durability and maintenance. Improving attributes such as the dimensional stability of wood is therefore necessary to make it more attractive to consumers. This project aims to assess the performance of Canadian species; white spruce (Picea glauca...
G Boivin, D Schorr
A novel wood preservation technology improving durability and water-related properties
2022 - IRG/WP 22-40926
A newly developed silicone oil (Archroma Management GmbH, Switzerland) was tested for wood modification purposes. Scots pine sapwood was treated with aqueous solutions of this silicone oil and showed a penetration of the modification agent into the wood cell wall. Both, biological durability and moisture-related properties, experienced significant improvements by the modification. Besides, the mod...
L Emmerich, H Militz, M Vila
Environmentally Friendly Wood Modification based on Tannin-Furfuryl alcohol - Effect on stabilisation, mechanical properties and decay durability
2022 - IRG/WP 22-40929
Furfurylation is a well-known wood modification technology. This paper studied the effect of tannin addition on the wood furfurylation. Three kinds of dicarboxylic acids, adipic acid, succinic acid, and tartaric acid, as well as glyoxal as a comparing agent, were used to catalyse the polymerisation of furanic or tannin-furanic solutions during wood modification. Impregnation of furanic or tannin-f...
M Mubarok, E Azadeh, F O Akong, S Dumarçay, A Pizzi, C Charbonnier-Gérardin, P Gérardin
Steam Pre-conditioning Treatment Prior to Acetylation: Impact on Dimensional Stability, Moisture Response Behaviour, and White-Rot Fungal Resistance of Hevea brasiliensis and Mitragyna ciliata Wood
2022 - IRG/WP 22-40930
The effect of steam pre-conditioning treatment on the dimensional stability, moisture response behaviour, and durability against white-rot fungus P. chrysosporium of acetylated Hevea brasiliensis and Mitragyna ciliata wood species were assessed. Defect-free specimens of both species from the top, middle, and base positions were selected, prepared according to ASTM D143-09 & ASTM D-2017 standards a...
E Uchechukwu Opara, J Mayowa Owoyemi, J Adeola Fuwape
Surface chemical wood densification through in situ electron beam polymerization: description and dose study
2022 - IRG/WP 22-40933
Traditional wood chemical densification processes can be used to improve wood mechanical properties by increasing density of the material throughout its thickness. While mechanical surface densification has heavily been investigated, surface treatments involving impregnation of monomers remain unexplored. This study describes a new material, surface densified through lateral impregnation of acryla...
J Triquet, P Blanchet, V Landry
Chemical modification of cellulose nanofibrils for tailoring properties of composites
2022 - IRG/WP 22-40934
Due to its natural abundance, complete biodegradability and excellent properties, cellulose is one of the most promising materials for the production of bio composites, as well as one of the most promising fillers for biodegradable polymer composites. This is also true for nanocellulose. A large number of hydroxyl groups on the surface of fibers or fibrils enables a whole series of chemical reacti...
I Poljanšek, J Levanič, V Ž Bogataj, V Vek, P Oven
Optimized composition of alkyd emulsion with nanoparticles of iron oxide for enhancing protection of thermally modified wood
2022 - IRG/WP 22-40940
Thermal treatment is acknowledged as an environmentally friendly method to improve durability of wood and some of its properties, such as biological resistance, dimensional stability, reduced hygroscopy. Despite these improvements, when used outdoors, also thermally treated wood is subjected to the action of environmental factors, like solar radiation, moisture, precipitations, temperature, etc., ...
E Sansonetti, D Cīrule, I Andersone, B Andersons, E Kuka
Utilization of Pressure Treated Lumber in Cross Laminated Timber Manufacture and its Impact on Bondline
2022 - IRG/WP 22-40953
Mass timber building construction is increasing dramatically across North America which presents challenges to these structures not seen in Northern Europe. Large parts of the United States harbor termites and existing mass timber building technologies that rely solely on moisture exclusion to increase durability are insufficient in these areas. The successful expansion of mass timber construction...
G Presley, C Wainscott, J Valenti, S Noble
Evaluation of Decay Resistance for the Larch Wood Heat-treated with Superheated Steam
2022 - IRG/WP 22-40956
Heat-treatment of wood is a process that involves applying heat ranging 160–260°C to improve its physico-mechanical properties and resistance against wood rot fungi. The level of the changes in the wood properties by heat-treatment differs depending on the temperature and duration of heat-treatment, as well as the types of heat transfer media used for heat-treatment. The heat-treatment on wood ...
Y Park, S-M Yoon, H Kim, W-J Hwang