Your search resulted in 260 documents. Displaying 25 entries per page.
Novel bio-based tannin/furfurylic alcohol thermosets: application to wood preservation
2022 - IRG/WP 22-40959
This project is integrated within the overall context of sustainable development and targets the valorization the wood industry by-products such as polyphenolic extractives, and in particular tannins. The objective targets the use of the same polymer used for production of tannin-furanic foams, but here for wood preservation to avoid the utilization of biocides. The aims is to the design of copoly...
C Gérardin-Charbonnier, E Azadeh, A Pizzi, P Gerardin
Improvement of durability of Scots pine against termites by impregnation with citric acid and glycerol followed by in situ polyesterification
2023 - IRG/WP 23-30777
Scots pine (Pinus sylvestris) sapwood samples were impregnated with solution containing citric acid (CA) and glycerol (Gly) followed by heating 140 °C according to already described procedure (L'hostis et al. 2018). The resulting modified woods were then used to evaluate the effect of chemical modification on the durability against termites. Two kinds of experiments were conducted for this purpos...
M Mubarok, J Damay, E Masson, E Fredon, Y S Hadi, I W Darmawan, P Gerardin
The influence of chemical and thermal modification on homogeneity between sapwood, heartwood, and transition wood of short rotation teak
2023 - IRG/WP 23-40961
Short rotation teak wood has low quality especially in durability. Heartwood presents sufficient natural durability and poor impregnability; meanwhile, most sapwood requires special treatment to increase its durability. The objective of this work was to investigate the effect of thermal or chemical treatment on homogenization between sapwood, heartwood, and transition wood for some selected proper...
R Martha, B George, W Darmawan, P Gerardin
The impact of pre-drying on treatment level variations of esterified solid wood analysed by X-ray densitometry
2023 - IRG/WP 23-40977
Wood modification requires homogenous treatment levels within the wood matrix to prevent insufficiently treated areas being subject to biodeterioration. Esterification of wood by citric acid and sorbitol can show differences in density caused by uneven chemical distribution during the curing phase and can be detected by x-ray densitometry. This study used density profiling to investigate the influ...
A Treu, S O Amiandamhem, E Larnoy
Optimization of furfurylic alcohol/tannin ratio to improve the performance of biosourced thermoset resins for wood protection
2023 - IRG/WP 23-40994
This study concerns the chemical modification of wood with different ratios of tannin and furfuryl alcohol (FA) in the presence of maleic acid as catalyst. Tannins were used not only as cross-linking agents, but also as co-monomers to improve wood durability, while reducing the amount of FA used. Different aqueous formulations were prepared containing decreasing amount of FA (from 45.45% to 0%) an...
E Azadeh, A Pizzi, P Gérardin, C Gérardin-Charbonnier
Studies on the treatability of selected pine species and corresponding efficacies of a new non-biocidal treatment
2024 - IRG/WP 24-20721
Wood decay caused by fungi may reduce the service life of wood in outdoor applications. Since moisture conditions in wood occur as one of the most crucial parameters for fungal decay, chemical modifications, which affect the latter, may increase the resistance of wood against such organisms. Usually, pine sapwood is easier to chemically treat than heartwood, as the former generally shows good perm...
T R da Silva Lins, L Emmerich, H Militz, P H Gonzales de Cademartoni, R J Klizke, M Pereira da Rocha
Physical, durability and chemical characterization of Gmelina arborea (Roxb.) wood treated with lactic acid
2024 - IRG/WP 24-30803
The increase in demand for durable wood has drawn attention to the use of fast-grown plantation species across the globe. Chemical modification was used to treat Gmelina arborea wood with lactic acid for property enhancement. The treated samples were obtained from two different ages of 15 and 10 years and sawn into (20 x 20 x 60) mm and (20 x 20 x 20) mm for physical, durability and chemical chara...
T O Akinwamide, J M Owoyemib, E A Iyiolac
Copper migration from preservative-treated Douglas-fir decking: models vs laboratory leaching data
2024 - IRG/WP 24-50390
The ability of a model to predict copper migration from Douglas-fir treated with organic metallic substances into a freshwater slough was evaluated against data generated through simulated overhead leaching. The model predicted very high loadings of ammoniacal copper zinc arsenate, alkaline copper quaternary or copper azole that had the potential to impact water quality while data from the exper...
M J Konkler, G Presley, J J Morrell, T Singh
Quantifying metal migration from a deck constructed with copper-azole-treated lumber
2024 - IRG/WP 24-50391
Soluble copper or micronized copper wood preservatives are the most common available wood preservative systems for residential applications in the United States. Copper containing wood preservatives have been scrutinized for their potential negative impacts on the environment, across many jurisdictions. Concerns arise from the potential for preservatives to migrate out of treated wood upon water e...
G Presley, M Konkler
Exploring the migration of creosote in freshwater environments: A study on treated wood immersion
2024 - IRG/WP 24-50392
Creosote is used as a wood preservative in aquatic environments and contain polycyclic aromatic hydrocarbons as active ingredients. It is critical to quantify the impact of these commodities on the environment to ensure specific uses of these commodities complies with federal and state regulatory standards for water bodies. This study explores Polycyclic Aromatic Hydrocarbons (PAH) migration patte...
I Rashidijouybari, M Konkler, K Quigley, G Presley