Your search resulted in 149 documents. Displaying 25 entries per page.
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
The potential and the challenges of acetylated wood in timber bridges - experiences from an ongoing project
2017 - IRG/WP 17-40792
Acetylated wood is known to be a durable and dimensional stable alternative for high performance materials, and has high potential for exterior timber structures. Research has shown that acetylated wood can be effectively bonded by various adhesive types. However, one of the most common used adhesives for timber constructions, Melamine Urea Formaldehyde (MUF), shows a high degree of delamination o...
A Treu, R Bredesen, F Bongers
NGS analysis of fungal OTUs in Aquilaria sp. from French Guyana, Cambodia, Laos and Thailand
2017 - IRG/WP 17-50328
Aquilaria is a tree species belonging to the Thymeleaceae family. When Aquilaria sp. is injured, it produce agarwood. Agarwood is characterized by a darker wood colour than the healthy one and by a strong perfume that is much esteemed by perfumers and some oriental religious communities. The production of agarwood is presumed to depend of environmental factors, among them fungi. The aim of this wo...
C Zaremski, C Malandain, O Sibourg, C Andary, G Michaloud, M Ducousso, N Amusant, A Zaremski
Natural durability, ethanol-toluene extractives and phenol content prediction of eight wood species from Madagascar using NIRS multispecific models
2018 - IRG/WP 18-10926
Madagascar has nearly 4000 species of trees and shrubs, but wood properties of only 200 species have been studied. Some properties, such as the natural durability or chemical composition are of importance for adequate and optimal use of these timber species. Since durability tests take long time and chemical analyzes can be very expensive, alternative methods such as near infrared spectroscopy (NI...
A R Razafimahatratra, H Rakotovololonalimanana, M-F Thévenon, C Belloncle, G Chaix, T Ramananantoandro
Recent findings clarifying the mechanism of brown-rot decay protection in acetylated wood
2018 - IRG/WP 18-40827
This paper summarizes the findings obtained during my PhD research over the past three years. The results provide insights which help to understand the enhanced brown-rot decay resistance of acetylated wood with particular emphasis on the role of water. The protection acetylation provides is derived from moisture exclusion within the acetylated cell wall, but the exact mechanism by which water is ...
G Beck
Properties and potential use of Irvingia gabonensis and Irvingia wombolu kernel extracts as natural wood adhesives: Towards formaldehyde free wood composite products
2018 - IRG/WP 18-40832
Irvingia species are widely distributed in central and West Africa as well as parts of Asia and are earmarked for domestication due to the multitude of potential products that can be obtained from them. With renewed interest in renewable sources, the current study establishes the feasibility of utilizing extracts from Irvingia gabonensis and Irvingia wombolu kernels as wood adhesives. Proximate an...
A O Alawode, S O Amiandamhen, M Meincken, L Tyhoda
Molecular identification of marine borers causing wood deterioration on marine facilities in Korea
2019 - IRG/WP 19-10955
The deterioration factors of wood which was used in the marine environment, Tongyeong (South Coast) and Incheon (West Coast) in Korea, were investigated in order to develop technologies for safe and long-term use of timber in ocean facilities.
The marine microorganisms isolated by damaged wood were identified as morphological Chelura sp. and Teredo sp. As a result of DNA sequencing, it was confir...
Sae-Min Yoon, Min-Ji Kim, Won-Joung Hwang, Yong-Seok Choi, Dong-Won Son
Alternative products enhancing dimensional stability comparing to conventional treated products in Japan
2019 - IRG/WP 19-40885
The Act on the Promotion of the Utilization of Wood in Public Buildings (2010) in Japan has made a new stream of the utilization field of timber from housing constructions to larger scale non-housing constructions. After the act, the performance of dimensional stability in preservative treated products becomes more important factor than before. Therefore, various technologies have been developed, ...
K Yamamoto, D Tezuka, Y Sugai, S Maeda, I Momohara
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
Limiting Polysaccharide Motion Protects Wood From Decay
2020 - IRG/WP 20-40890
It is well known that chemical modifications to improve decay resistance also reduce the equilibrium moisture content (EMC) of wood. The mechanism of this action, however, has been the subject of much debate. Several groups have suggested that decay resistance is a result of lower diffusion rates of fungal degradation agents through the wood cell wall. A recent paper explained the fundamental prin...
C G Hunt, S L Zelinka, J E Jakes
Enhancing the durability of low durability Eucalyptus plantation species: a review of strategies
2020 - IRG/WP 20-40910
Eucalyptus species native to Australia have shown excellent growth rates, good physical properties and resistance to diseases. As a result, they are widely planted globally for a variety of uses. One negative aspect of many of these faster growing species is that they have a high percentage of low durability heartwood that resists preservative treatment. In Australia, large plantations of these sp...
K C Wood, J J Morrell, W Leggate
Application of suberin fatty acids extracted from birch bark for wood coating
2021 - IRG/WP 21-40914
It is well known that chemical modifications to improve decay resistance also reduce the equilibrium moisture content (EMC) of wood. The mechanism of this action, however, has been the subject of much debate. Several groups have suggested that decay resistance is a result of lower diffusion rates of fungal degradation agents through the wood cell wall. A recent paper explained the fundamental prin...
A Kumar, Risto Korpinen, Veikko Möttönen
Impregnation of wood with antifungal compounds from low-quality tree biomass
2022 - IRG/WP 22-30763
In this paper we have reviewed recent research on the development of bio-based preservative formulations for wood done at the Department of wood science and technology, Ljubljana. Preservative formulations used in this investigation were prepared using plant polyphenols as biocidal agents. These nonstructural components of wood were stilbenes and flavonoids, and were extracted from wood of broken ...
V Vek, I Poljanšek, A Balzano, M Humar, P Oven
Molecular dynamics investigation of wood modification with furfuryl alcohol
2022 - IRG/WP 22-40931
Molecular dynamics (MD) was applied to investigate and understand the structural characteristics and the interaction of cellulose and lignin with furfuryl alcohol for explaining the wood modification process. A single chain of cellulose polymer model and a softwood lignin model was considered to represent cellulose and lignin polymers. The obtained radial distribution function results revealed tha...
V Ponnuchamy, J Sandak, A Sandak
Establishing the minimum effective penetration of wood preservatives in the refractory heartwood of E. nitens
2023 - IRG/WP 23-30780
Conventional pressure treatment of many Australian hardwoods results in little to no penetration of heartwood and a non-uniform envelope treatment of <5 mm surrounding a mostly untreated core. This is a major issue for many of the low durability plantation hardwood timbers that are grown in Tasmania, which contain high percentages of heartwood. Long term studies on softwoods such as spruce decking...
J R Vargas, J J Morrell, L Yermán, K C Wood
Through-boring to improve the performance of low durability Eucalyptus species for utility poles: 10-year field test results of pole stubs exposed in Southeast Queensland
2023 - IRG/WP 23-40972
An impending shortage of naturally durable hardwood electricity pole timbers in Australia has encouraged investigation of alternatives containing less durable, untreatable heartwood. Through-boring or drilling holes perpendicular to the long axis before treatment, has been used successfully on refractory softwood poles in North America and might have application in Australia. The use of through-bo...
J Norton, L P Francis, J J Morrell
Evaluation of the effectiveness of soaking of high-temperature plywood in low-temperature oil-based wood
2023 - IRG/WP 23-40991
We conducted a preliminary investigation to determine if soaking high-temperature plywood in a low-temperature preservative solution could achieve deeper penetration of the preservative, even in plywood made with refractory wood species such as Japanese larch. Specimens cut from commercial plywood (Japanese larch) were stored at various temperatures before being soaked in the preservative solution...
T Miyauchi, S Isaji, H Shibui, N Furuta, J Miyazaki, H Matusnaga
Service life of poplar, a low durability hardwood
2024 - IRG/WP 24-41007
Hybrid poplar is the most common plantation hardwood of the temperate climate zone and is complementary to natural stands of aspen with mainly plantations in Europe and China. Poplar wood has been considered as a valid alternative for many of the construction applications of softwoods especially when considering engineered wood products.
The natural durability of hybrid poplar is low and for a ra...
J Van Acker, X Jiang, L De Ligne, J van den Bulcke
Durability and molecular analysis of fungal communities in wood exposed above ground
2025 - IRG/WP 25-11068
The objective of the study was to explore the durability of wood exposed above ground, comprising a wide diversity of wood species and treatments and extensive assessment data on wood durability in ongoing long-term testing. Larch species and Scots pine heartwood, two tropical species ntholo and ncurri and a number of treated wood by copper-based formulations and alternatives (silanes, spiroborate...
N Högberg, D Panov, G Daniel, N Terziev
From Wet to Preserved: Collecting Data of Waterlogged Wood Treated with PEG in Lanyan Museum and Study the Effect of Molecular Weight on Dimensional Stability
2025 - IRG/WP 25-11080
Waterlogged archaeological wood are most commonly unearthed in Yilan County, with over one-third originating from the Yilan Agricultural School site. This study aims to analyse the current state of conservation of waterlogged archaeological wood in Yilan County and hopes to properly alleviate the irreversible damage caused to the waterlogged archaeological wood after they leave the water layer. Ho...
K-L Huang, P-Y Kuo
The non-energy utilization of low-quality wood from the invasive species Prunus serotina
2025 - IRG/WP 25-30814
Alien invasive species in Europe, such as Prunus serotina, can significantly impact ecosystem structure and function. This species provides low-quality timber, which is most often used for energy purposes in the form of biomass. In the era of policies focused on a circular economy, seeking methods to extend the life cycle of raw materials and wood products is necessary. For this purpose, the wood ...
W Perdoch, P Kołwzan
Enhanced Termite Resistance of Low Durability Fast Growing Teak Wood by Non-Biocide Treatments Based on Chemical and Thermal Modification
2025 - IRG/WP 25-30818
Short rotation teak as a fast-growing tree can be considered as a renewable material resource for the future green economy. However, short rotation teak wood is susceptible to biodeterioration, particularly to termite attack. The objective of this work was to investigate the effect of chemical and thermal treatment on resistance of sapwood, transition wood, and heartwood of short rotation teak aga...
R Martha, K Candelier, M-F Thévenon, B George, I S Rahayu, W Darmawan, P Gérardin
Influence of plasma treatment on the coatability of wood primer with a topcoat for exterior use
2025 - IRG/WP 25-30828
The coatability of oil, or of solvent-borne alkyd resin wood primers with waterborne acrylic finish is the subject of much debate, but not much information can be found in the scientific literature on this topic. The aim of our study was therefore to evaluate the adhesion strength of the waterborne acrylic coating on oiled wood or wood with a solvent-based alkyd primer and to test the recoatabilit...
M Petrič, L Albreht, N B Štrus, E Keržič, M Pavlič, J Žigon, S Dahle
Developing a Novel Bio-based PF Resin as Wood Preservative and Explore its Synthesis Route Using RSM Methodology
2025 - IRG/WP 25-41046
Phenol-formaldehyde (PF) resin treatment has long been recognized as one of the most effective and widely used wood preservation methods, offering exceptional durability, dimensional stability, and resistance against biological degradation. However, traditional PF synthesis relies heavily on petroleum-derived phenol, raising concerns about environmental impact and resource sustainability. To date,...
H-C Ye, Y-C Wu, T-H Lin, P-Y Kuo