Your search resulted in 25 documents.
Enhanced Flame Retardancy in Wood via In Situ Polymerization of Phosphorus-Containing Ionic Liquids
2025 - IRG/WP 25-20736
…this study, we synthesized a novel phosphorus-containing, polymerisable IL. The IL was impregnated into the wood and polymerised in situ, yielding PIL-modified wood. Raman spectroscopy and SEM confirmed the IL's in-situ polymerisation in the wood and its effect on swelling the cell walls. Notably, wood treated with…
J Jiang, Y Wu, J Luo, W Qu
Influence of hygro-thermal treatment temperature and duration on dimensional stabilisation of wood modified with poly(butylene succinate)
2017 - IRG/WP 17-40813
…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…
C Grosse, M Noël, L Rautkari, P Gérardin
Enhancing wood properties through bio-based and non-biocidal co-polyesters
2016 - IRG/WP 16-40740
…by impregnation of aqueous solutions of various poly- carboxylic acids or anhydrides (citric acid, succinic anhydride, tartaric acid) and glycerol, followed by in situ heat polymerization.
The chemicals mentioned are all bio-based, and allowed for food use (except succinic anhydride)
The resistance of…
C L’Hostis, M-F Thévenon, E Fredon, P Gérardin
Effect of insitu polymerization on practical properties of heat treated wood
2016 - IRG/WP 16-40763
…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…
M Ghorbani, M Mohseni Shaktaei
Hygroscopicity of wood after polyethylene glycol (PEG) impregnation and/or heat treatment
2013 - IRG/WP 13-40623
The hygroscopicity of wood after polyethylene glycol (PEG) impregnation and/or heat treatment was investigated by testing the water uptake, equilibrium moisture content (EMC) at various relative humidity levels, and contact angle of the poplar wood surface. The results showed that: (1) At…
Weiyue Xu Yuan Zhu, Jinzhen Cao
Probing red maple pit membrane pore size at FSP and OD using polystyrene macromolecules
2001 - IRG/WP 01-40217
…exclusion technique was used to pressure impregnate a polystyrene molecular weight (MW) series dissolved in styrene into red maple samples at approximately the fiber saturation point (FSP) and oven dry (OD). Radial penetration was less than tangential and FSP less than OD. There was a marked penetration change…
A Omidvar, M H Schneider, A R P Van Heiningen
Physical and mechanical properties of wood-polymer composites prepared from alder wood (Alnus glutinosa (l.) gaertn. subsp. barbata (c.a.mey.) yalt)
2001 - IRG/WP 01-40201
In this study, the physical mechanical properties of wood-polymer composites prepared from alder (Alnus glutinosa (L.) Gaertn. subsp. barbata (C.A.Mey.) Yalt) wood were investigated. Three different monomers styrene, methyl methacrylate and styrene/methyl methacrylate (70/30) mixtures and two loading levels were…
A Temiz, Ü C Yildiz, E D Gezer
A new process for in situ polymerization of vinyl monomers in wood to delay boron leaching
1998 - IRG/WP 98-40110
…A supplementary combination treatment with vinyl monomers; styrene (ST) and methylmetacrylate (MMA) was studied in order to extend the service life of boron treated wood. Sapwood specimens of Japanese cedar (Cryptomeria japonica D. Don) first treated with boric acid (BA) at 1.00% aqueous solution concentration. Vinyl…
M K Yalinkilic, W Dwianto, Y Imamura, M Takahashi
Prevention of termite tubing on foam insulation materials
2024 - IRG/WP 24-11039
…foam was readily protected by an application of a polyglycol borate to the foam surface. It is recommended that when foam insulation is used in wall, crawlspace or slab applications in structures, termite resistant foam insulation is used in addition to treating the wood with a polyglycol borate prior to…
Q Wu, J Curole, J D Lloyd
Penetration and distribution of styrene in pressure treated hardwoods
1997 - IRG/WP 97-40094
A styrene impregnation method was used to compare liquid distribution in several species as affected by flow direction, sapwood/heartwood, and method of impregnation. Twenty-five mm ( 1") cubes were cut from the sapwood and heartwood of red maple (Acer rubrum),…
P A Cooper, T S Janezic, U Srinivasan, A Omidvar
Development of Potentiometric Enzyme Biosensor for Detection of Permethrin Preservative in Treated Wood
2017 - IRG/WP 17-20628
…with hydrogen ionophore and a lipophilic salt. A poly(2-hydroxyethyl methacrylate) (pHEMA) was used to immobilise carboxylesterase for the detection of permethrin. Linear response range of the biosensor based on the enzyme was 1.99–79.43 μM of permethrin (r2 = 0.9912). Limit of Detection (LOD) for the…
M Nasir Mat Arip, C Tan, Gan Kee Seng
Investigating the potential role of creosote oil for the water repellent purposes in fiberboards
2013 - IRG/WP 13-40635
…Acidified
creosote oil (free of high molecular weight poly aromatic hydrocarbons) was added to
each fiber composition distinctly to evaluate and compare specifications with creosote
free board specimens. All specimens were tested physically and mechanically to
evaluate the effect of oil presence and wood…
M Sheikholeslami
Protective nanoparticle coating reducing water absorption of wood species
2012 - IRG/WP 12-40614
…samples for controlling the surface hydrophobicity. The styrene(maleimide) nanoparticles were synthesized in aqueous dispersions under pure conditions or in combination with 70 wt.-% palm oil. A first evaluation of the non-coated wood surfaces indicates a high dependence between the water contact angles, the…
P Samyn, A Paredes, G Becker, H Van den Abbeele, L Vonck, D Stanssens
Wood plastic composites from modified wood. Part 3. Durability of WPCs with bioderived matrix
2008 - IRG/WP 08-40423
…modified wood particles and 50% cellulose ester (CAP) or poly-lactic acid (PLA) content. The field test specimens were taken from larger extruded decking board profiles with 60% wood content and 40% CAP. 60/40-mix (wt/wt) for CAP corresponds to the same volumetric composition as 70/30-mix (wt/wt) with polypropylene…
M Westin, P Larsson Brelid, B K Segerholm, M Van den Oever
Furfurylated wood - An alternative to Preservative-treated wood
2006 - IRG/WP 06-40349
…does not release any more volatile organic compounds or poly-aromatic hydrocarbons than normal levels for wood combustion. Durability enhancement by furfurylating wood has not proven to be harmful to the environment. Test results have shown it to have performance similar to traditionally preserved wood.…
S Lande, M H Schneider, M Westin, J Phillips
Environmental risk assessment of treated wood - A mesocosm study
2005 - IRG/WP 05-50224-8
In order to evaluate the environmental impact of treated poles, we have developed physical models (mesocosms) containing around 250 kg of natural soil and a treated pole.
On the top of each mesocosm, a spraying mechanism, which can distribute ultrapure water…
P Marchal, F Poly
Evaluation of fluid distribution in pressure treated wood in different flow directions
2004 - IRG/WP 04-40281
Among different methods, polymerization technique was chosen to study distribution of fluid through cell types in treated wood. Red maple wood specimens with the size of 2 by 2 by 4 cm (radial, tangential and longitudinal, respectively) were prepared. Styrene monomer was used as the…
A Omidvar, M H Schneider
Modification of wood by graft treatment
2003 - IRG/WP 03-40257
…and (NH4)2Ce(NO3)6 were used as initiators and styrene as the monomer. All the graft treatment systems were capable of imparting appreciable water repellency, although water repellency was not permanent using the KMnO4 initiator system. Surprisingly, the major part of the imparted water repellency was…
M M Morshed, D D Nicholas, C Pittman Jr, T Schultz
Fire resistance of Alder wood treated with some chemicals.
Part II. Effect of Other Chemicals on the Combustion Properties
2002 - IRG/WP 02-40235
…(boric acid, borax,
sodium perborate), vinyl monomers (styrene, methyl methacrylate), Tanalith-CBC, Phosphoric acid, Vacsol, Immersol, Polyethylene glycole (PEG-400) and their mixed solutions of chemicals in order to determine their combustion properties.
The results indicated that inorganic boron compounds with…
A Temiz, Ü C Yildiz
On the resistance of consolidated ancient wood against Serpula lacrymans (Wulfen: Fr.) Schroeter
2000 - IRG/WP 00-10348
…Brown-rotted wood consolidated with acrylic resins, PVA (poly(vinyl acetate)), epoxy resins, shellac, linseed oil, animal glue and a beeswax/paraffin mixture were tested against the brown-rot fungus, Serpula lacrymans. Specimens impregnated with linseed oil and the epoxy resins Araldit BY and Araldit DY did not…
W Unger, A Unger, U Schiessl
Improvement of intrinsic properties of wood by chemical wood densification - Hydrophobic aspects and durability aspects
1999 - IRG/WP 99-40149
…by active substances like diisocyanate compounds with a copolymerization step. The second way is a densification by an impregnation of resins and a gamma polymerisation. This second way is described and discussed in this paper The measured parameters are (1) the hydrophobic properties of the surface based on…
G Labat, Q K Tran, I Le Bayon
Degradation of lignin model compounds with coordinated copper in the presence of peroxide
1998 - IRG/WP 98-10282
…was used as a copper coordinator, two synthetic dyes, Poly-R and RBBR were intensively decolorized with Cu(II) and H2O2 in aqueous solutions at room temperature. Although reactions with Cu(II) and H2O2 produce a strong oxidant, hydroxyl radical, via a Fenton pathway, the coordinated copper system presented here…
K Koller, K Messner, T Watanabe
The probable mechanism of action of boric acid and borates as wood preservatives
1990 - IRG/WP 1450
…tetrahydroxyborate ion [B(OH)4-] acts by complexation with poly-ols and probably attacks decay fungi through extracellular substrate sequestration; intracellular substrate sequestration; enzyme inhibition; and change in membrane function. Work was carried out to investigate this further and to try to explain certain…
J D Lloyd, D J Dickinson, R J Murphy
Information from the COIPM Wood Group
1988 - IRG/WP 4146
…work to test the durability of heat shrinkable polyolephin sheating materials for the protection of wood against marine organisms. The work began last year when wood samples were sent out to the participants. Three samples of Pinus sylvestris wrapped in polyolephin supplied by Raychem were sent to the…
A Gambetta
Dimensational stabilisation of wood
1981 - IRG/WP 3171
…studies were then started. Wood was treated with monomers (styrene, methyl metacrylate, isocyanate), formaldehyde, tannin and sugar. Despite a satisfactory reduction of the shrinkage behaviour, the costs of these methods are prohibitive. A recently developed heat treatment adjusting wood moisture content, temperature…
A Burmester