Your search resulted in 376 documents. Displaying 25 entries per page.
Studying Weathering Performance of Coatings on Thermally Modified Wood
2017 - IRG/WP 17-40805
Thermal modification and degree of improved properties depends on wood species and treatment parameters. Southern pine and spruce are the two common wood species for decking, fences and siding in North America. This study was the first to evaluate coating performance when applied on oil-heat-treated southern pine and spruce wood samples. Water uptake, colour and gloss changes of samples were analy...
M Nejad, M Dadbin, P Cooper
Impact of heat treatment on physico-mechanical properties of torrefied Antholceistha djalonensis wood
2017 - IRG/WP 17-40811
Thermal modification at relatively high temperatures is an effective method to improve the dimensional stability and mechanical properties of wood. This study was carried out to investigate the impact of heat treatment on the physic-mechanical properties of torrefied Anthocleistha djalonensis wood. Thirty nine defect-free specimens of dimensions 20 mm × 20 mm × 60 were prepared for the determina...
E A Iyiola, B Olufemi, J A Fuwape, J M Owoyemi
Influence of hygro-thermal treatment temperature and duration on dimensional stabilisation of wood modified with poly(butylene succinate)
2017 - IRG/WP 17-40813
To improve wood properties, especially dimensional stability, a treatment based on poly(butylene succinate) oligomers (OBS) was experimented. After impregnation in wood, a further hygro-thermal treatment (HTT) was carried out in a pressurized reactor at 100% relative humidity (RH) at differing temperatures for differing durations. The aim of HTT is to induce partial swelling of wood cell walls so ...
C Grosse, M Noël, L Rautkari, P Gérardin
Analysis of Wood Industrial Pollutants Based on Emission Coefficients
2017 - IRG/WP 17-50325
Accurate calculation and estimation pollutants is one of the basic tasks of environmental protection .The low carbon economy put forward However，low carbon economy data of wood industry is lack. The paper research on emissions and pollution of Chinese wood industry. The results showed dust emissions from much to least is: fiberboard, plywood and particle board; the amount of industrial ...
Chu Jie, Ma Ji, Zhangjing Chen
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
Exploration of waterlogged piles and wooden constructions of Riga Dome Cathedral
2017 - IRG/WP 17-10901
The Riga Dome Cathedral’s waterlogged wood piles and the roofs and tower's wooden structures were investigated, the extent of biological damage was evaluated, and the wood rot fungi and insects were identified. The pile wood’s component composition and elemental composition were analysed; the wood structure damage by erosion bacteria was microscopically determined. In the roofs and tower ...
B Andersons, I Andersone, I Irbe, V Fridrihsone, R Lūsis
Multivariate modeling of mould growth in relation to extractives in dried Scots pine sapwood
2017 - IRG/WP 17-20629
Influence of extractives on mould growth on Scots pine sapwood dried in air or in kiln was studied. Boards were sprayed with water mixtures of spores of the fungal species Penicillium sp., Aspergillus sp., Mucor sp., Paecilomyces sp., Trichoderma sp., treated at a temperature of 22ºC at 90% RH, classified into a percentage of covered area. Acetone and water extracts were isolated and analyzed for...
O Karlsson, O Myronycheva, M Sehlstedt-Persson, M Öhman, D Sandberg
Assessing the nutrient value of bio-based materials in relation to early fungal growth
2017 - IRG/WP 17-20631
Bio-based materials are gaining importance in the building industry, as the focus on sustainability and life-cycle-assessment has increased dramatically over the last decade. Wood and wood-engineered products as well as insulation materials made from flax, hemp, etc. are hence increasingly used. These materials originate from renewable resources and are often biodegradable, which can cause problem...
L De Ligne, J Van den Bulcke, J Baetens, B De Baets, J Van Acker
Resistance of modified wood to termite attack assessed in laboratory and field testing: A review of internal research
2018 - IRG/WP 18-40824
Within the past decades, new wood modification technologies have been investigated in order to improve certain wood characteristics and enable the use of timber products for outdoor applications. Some of these non-biocidal technologies have been developed and commercialized recently. Thus, various material properties were studied intensively and shown to be improved. To a great extent, previous re...
L Emmerich, P Gascón-Garrido, H Militz
An examination of the potential for the use of the Maillard reaction to modify wood
2018 - IRG/WP 18-40829
Finding efficient ways to decrease wood decay caused by fungi and increasing its dimensional stability is an important issue in the timber construction. A possible way to avoid wood decay by fungi is by reducing the water content of wood, since water is a primary condition for fungal growth. Bulking of the wood cell wall by chemical reagents occupies the space where water normally occurs. At the s...
K Peeters, E Larnøy, A Kutnar, Č Tavzes, C A S Hill
In-line quality control of the film thickness in industrial coating processes for exterior cladding
2018 - IRG/WP 18-40835
The production of industrially coated wood cladding has been strongly increasing in Scandinavia during the last years. In the beginning of this development, industrial coating processes included solely the application of pigmented primers; these however provide only a short protection of the wood surface and the application of a top coat is required during the first 6 to 12 months after mounting t...
U Hundhausen, M Slabohm
A Conceptual Review of Young People’s Perceptions about Wood
2018 - IRG/WP 18-40836
This article was adapted from the previous study “Young People’s Perceptions about Wood” prepared by Usta (2017), and extended through the development and evaluation of the initial data in terms of the conceptual framework regarding the descriptions of wood by young people. Because it was highlighted by previous study that the university students as the full members of society have the aware...
I Usta
A Synergistically Stabilized Oil-in-Water Paraffin Pickering Emulsion Used in Wood Treatment
2018 - IRG/WP 18-40840
Pickering emulsions (emulsions stabilized by solid particles) are attractive as they have strong similarities with traditional surfactant-stabilized emulsions. In this study, an oil-in-water (O/W) paraffin Pickering emulsion system with satisfying stability and small droplet size distribution was developed by hydrophilic silica particles and traditional surfactants as mixed emulsifiers. The drople...
J Jiang, J Cao
Improvement of short rotation teak wood properties through thermal modification
2018 - IRG/WP 18-40842
Teak (Tectona grandis L.f) is one of the most popular tropical timber species. Nowadays, the source of long rotation teak is limited in the availability. Many wood processing industries use short rotation teak, which has lower quality especially in durability and dimensional stability. Heat treatment is an eco-friendly method improving dimensional stability and durability of wood. The objectives o...
L A Pratiwi, I W Darmawan, B George, A Merlin, C Gérardin, S Dumarçay, T Priadi, P Gérardin
Wood-Plastic Composites preservation against fire: Nanofillers as fire retardant alternative
2018 - IRG/WP 18-40843
The purpose of this study is to improve fire resistance of Wood-Plastic Composites (WPCs) by adding inorganic nanofillers. Indeed, the main components of WPC, namely wood and polymer are both flammable materials despite the fact that WPCs are used in the field of construction. The effect of nanofillers on fire retardancy of Wood-High density polyethylene Composites was studied with three nanofille...
D Ben Ammar, A Koubaa, S Migneault, H Bouafif
Developments within COST Action FP1303 related to the modification of wood
2018 - IRG/WP 18-40847
COST Action FP 1303 (Performance of bio-based building materials) was established in 2013 with the main aim to improve the knowledge on the performance of bio-based materials used as building products and the assessment of factors influencing these, with the aim of increasing their service life. This Action has helped in understanding the interlinked relationships between durability, product aesth...
D Jones
Difference of wood decay manner between brown-rot species
2019 - IRG/WP 19-10938
Wood blocks (Cryptomeria japonica) which were decayed by a Polyporales white-rot fungus (Trametes versicolor) and brown-rot fungi (Fomitopsis palustris, F. pinicola, and Wolfiporia cocos), respectively, were analyzed by X-ray diffraction and infrared spectroscopic methods followed by multivariate analysis. In the analyses, the differences in the cellulose crystallinities and infrared spectral patt...
R Kondo, Yo Horikawa, S Nakaba, K Ando, M Yoshida
Performance of modified wood in service - multi-sensor data fusion and its multi-way analysis
2019 - IRG/WP 19-20660
Recent developments in the field of electronic sensors and analytics provide new opportunity for accurate characterization of materials often based on portable and non-destructive methods. By using several complementary techniques, the material description is precise and complete. The data provided by multiple equipment, however, are often not directly comparable due to different resolution, sensi...
A Sandak, J Sandak, M Cocchi
The use of bicine and tricine as possible Maillard reagents in a combined thermal/chemical modification of beech
2019 - IRG/WP 19-40852
The effects of thermal modification have been well established, particularly in terms of reductions in mechanical performance. In recent years, there has been an increase in studies related to the Maillard reaction. More commonly associated with food chemistry, it involves the reaction of amines and reducing sugars during cooking procedures. This paper has attempted to combine the use of amines an...
D Jones, C-M Popescu, D Krzisnik, M Hocevar, M Humar, M-C Popescu
Development of beech wood thermo-chemical modification treatments based on different vinylic derivatives of glycerol and polyglycerol
2019 - IRG/WP 19-40855
In this study, a combination between chemical and thermal wood modification has been investigated. Seven types of a low concentration of 10% aqueous additive solution of vinylicglycerol [glycerol-maleic anhydride (Gly-MA), glycidyl methacrylate (GM), and Glycerol methacrylate-maleic anhydride (GM/MA(2eq))], vinylicpolyglycerol [polyglycerol-maleic anhydride (PG-MA), polyglycerol methacrylate (PGM...
M Mubarok, S Dumarcay, H Militz, K Candelier, M-F Thevenon, P Gerardin
Chemical Analysis of Southern Pine Pole Stubs Sixty Months Following Treatment with a Methylisothiocyanate-Based Solid Fumigant Stick
2019 - IRG/WP 19-30740
Methylisothiocyanate-based fumigants have been commercially used in the United States for over 35 years to control internal decay in utility poles and other wooden structures with little technological advancement. The most recently commercialized methylisothiocyanate-based fumigant is chemically known as dazomet. Dazomet is a free-flowing powder or granule that decomposes in the presence of mois...
D J Herdman, T Pope, R R Browning
An overview of recent studies involving the thermal modification of hardwood species
2019 - IRG/WP 19-40869
This paper outlines recent activities related to the thermal modification of hardwood species, and particularly to tropical hardwood species. Timber demand is ever increasing, but this is being limited by the necessity to protect virgin forest stands. As such, the majority of supply of popular species is being met from juvenile short rotation stands. The limited age from these stands often plays a...
D Jones, M Gaff, F Kacik
Charring of Norway spruce wood surface – an alternative surface modification technique?
2019 - IRG/WP 19-40870
Charring is an old wood surface treatment technique, mainly performed on wooden façade elements with the aesthetical aims, but also with the purpose of protection. This flame treatment method can be grouped into heat treatment processes. Below the top charred layer of damaged wood there is a layer which is during flame treatment exposed to high temperatures in anoxic or semi-anoxic conditions. Th...
M Petric, M Pavlic, J Zigon
Improvement of wood decay and termite durability resulting from combined treatments based on borax/phenol-formaldehyde impregnation followed by thermal modification
2019 - IRG/WP 19-40871
This study determined the factors influencing the boron content after leaching of pine blocks impregnated with aqueous solution of phenol-formaldehyde (PF) resin with or without borax and subjected to heat treatment by response surface methodology. An experimental design permits to analyze the effects of heat treatment temperature (150, 185 and 220°C), curing time (5, 12, 5 and 20 hours), resin c...
S Salman, M-F Thevenon, A Petrissans, S Dumarcay, P Gerardin
Thermal performance and fire safety properties of traditional circumferential log-cabin walls
2019 - IRG/WP 19-40872
The paper describes the experiment of fire resistance of a circumferential log-cabin wall fragment using various structural modification of the gap between two log members. The influence of the gap structural modification on the criterion of fire resistance E (envelop integrity) and I (insulation) is evaluated. The evaluating criteria are represented by the development of temperatures measured in ...
S Jochim, L Makovicka Osvaldova, M Zachar, Z Danihelova