Impacts of impregnation with boron compounds on the bonding strength of wood materials

Özçi̇fçi̇, Ayhan

doi:10.1016/j.conbuildmat.2006.11.006

Cited by 8 publications

(9 citation statements)

References 5 publications

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“…The retention amounts for both types of impregnations in the two different woods were similar to each other [20]. Also, the retention ratio showed similar results.…”

Section: Retention Amount and Ratio Of Impregnation Solutionssupporting

confidence: 74%

Effects of Outdoor Exposures and Boron Compounds on Bonding Strength of Desmodur-VTKA Adhesive

Özçi̇fçi̇

2010

Journal of Adhesion Science and Technology

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This study was carried out to determine the shear strength of an adhesive on weathered wood, impregnated with a boron compound, using a long term dipping method. The shear strength of D-VTKA adhesive on two types of wood species each containing one of two types of the impregnated material, under different weathering conditions, was measured. The results showed that the highest shear strength (11.01 N/mm 2 ) was obtained with the control samples of untreated, oriental beech wood, and the lowest was obtained for Scots pine impregnated with boric acid after two seasons of exposure (six months). Weather conditions affected the shear strength in a negative way. Finally the results showed that if the boron compounds were supported with non-leaching chemicals, they could be recommended as fire-retardant additives and would extend the life of wood bonded with D-VTKA adhesive.

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“…The retention amounts for both types of impregnations in the two different woods were similar to each other [20]. Also, the retention ratio showed similar results.…”

Section: Retention Amount and Ratio Of Impregnation Solutionssupporting

confidence: 74%

Effects of Outdoor Exposures and Boron Compounds on Bonding Strength of Desmodur-VTKA Adhesive

Özçi̇fçi̇

2010

Journal of Adhesion Science and Technology

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“…In the literature wood samples were impregnated with different concentrations (1 to 13%) of boron compounds (Peker et al 1999;Toker 2007;Awoyemi 2008;Özçifçi 2008). In conclusion, mechanical strength losses increased with increasing concentration of boron compounds.…”

Section: Methodsmentioning

confidence: 99%

Effects of Boron Impregnation and Heat Treatment on Some Mechanical Properties of Oak (Quercus petraea Liebl.) Wood

Perçin¹,

Sofuoğlu²,

Uzun³

2015

BioResources

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Heat treatment changes some physical, mechanical, and chemical properties of wood. Inorganic borates have been used as wood preservatives for many years. The aim of this study was to investigate the effects of impregnation chemicals on some mechanical properties (bending strength (MOR), modulus of elasticity (MOE), tensile strength parallel to the grain (TS), compression strength parallel to the grain (CS), and shear strength parallel to the grain (SS)) of heat-treated oak (Quercus petraea Liebl.). For this purpose, the oak wood specimens were impregnated with 5% aqueous solution of boric acid (BA) and borax (BX). Then specimens were heat-treated at 160, 190, and 220 °C for 2 and 4 h. According to the results of the study, borax retention value was higher than boric acid. The bending strength, modulus of elasticity in bending, tensile strength parallel to the grain, and shear strength parallel to the grain decreased due to heat treatment. The highest mechanical strength losses were determined in samples heat treated at 220 °C for 4 h. Generally the mechanical strength losses of samples impregnated with borax were lower than non-impregnated controls and specimens impregnated with boric acid.

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“…Muchos factores pueden contribuir al desarrollo de una insuficiente resistencia en la línea de adhesivo. La presencia de preservantes y estabilizantes pueden interferir en la adhesión interfacial entre la madera y el adhesivo (Lee et al, 2006;Örs et al, 2004;Özçifçi, 2008). Se ha reportado que para lograr uniones estables con adhesivos del tipo PF en maderas tratadas con PEG fue necesario remover el PEG de las capas superficiales (Unger et al, 2001).…”

Section: Resultados Y Discusiónunclassified

“…Many factors may contribute to insufficient glue-line strength. The presence of preservatives and stabilizers can interfere with the interfacial adhesion between wood and adhesive (Lee et al, 2006;Örs et al, 2004;Özçifçi, 2008). It has been reported that to achieve stable bonds with PF-type adhesives in PEG-treated wood, it was necessary to remove the PEG from the surface layers (Unger et al, 2001).…”

Section: Resultados Y Discusiónmentioning

confidence: 99%

EVALUACIÓN DE TRES ADHESIVOS EN LA FABRICACIÓN DE TABLEROS ENLISTONADOS DE Aspidosperma quebracho blanco ESTABILIZADO CON POLIETILENGLICOL

Sanabria¹,

Cayre²,

Frank³

2011

rchscfa

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RESUMENEn este trabajo se evaluó que tipo de adhesivo es factible de utilizar en la fabricación de tableros enlistonados de madera de Aspidosperma quebracho-blanco impregnada con polietilengliol (PEG). Se analizaron tres tipos de adhesivos: polivinil acetato (PVAc), urea-formaldehído (UF) y fenol-formaldehído (PF) para conformar los tableros. La calidad adhesiva se determinó mediante la resistencia de la línea de adhesivo en tableros fabricados con madera impregnada y sin impregnar. El uso de PEG como estabilizante de la madera de Aspidosperma quebracho-blanco no interfirió en el proceso de adhesión cuando se utilizaron adhesivos UF y PF. Con el adhesivo PVAc provocó una disminución (< 15 %) de la resistencia en la línea de adhesivo respecto de la madera sin impregnar. El adhesivo que mejor se comportó de acuerdo a la Norma Española UNE 56-777-92. Determinación de la resistencia en la línea de adhesivo, fue el UF. Los adhesivos PVAc y PF no lograron pasar las especificaciones mínimas de 10 N·mm -2 aún en los tableros fabricados con madera sin impregnar. ABSTRACTThis study analyzed what type of adhesive is most suitable for use in the manufacture of Aspidosperma quebracho-blanco wood blockboards impregnated with polyethylene glycol (PEG). Three types of adhesives that could potentially be used to form the boards were analyzed: polyvinyl acetate (PVAc), urea-formaldehyde (UF) and phenol-formaldehyde (PF). Bond quality was determined by the glue-line strength in boards made with impregnated and non-impregnated wood. The use of PEG as a stabilizer of Aspidosperma quebracho-blanco wood did not interfere in the adhesion process when UF and PF adhesives were tested. The PVAc adhesive decreased (<15%) the resistance of the glue line in comparison with the non-impregnated wood. The adhesive that performed the best according to the Spanish standard UNE 56-777-92, pertaining to the determination of glue-line strength, was the UF one. The PVAc and PF adhesives failed to reach the minimum specifications of 10 N·mm -2 even in those boards manufactured with non-impregnated wood.

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Impacts of impregnation with boron compounds on the bonding strength of wood materials

Cited by 8 publications

References 5 publications

Effects of Outdoor Exposures and Boron Compounds on Bonding Strength of Desmodur-VTKA Adhesive

Effects of Outdoor Exposures and Boron Compounds on Bonding Strength of Desmodur-VTKA Adhesive

Effects of Boron Impregnation and Heat Treatment on Some Mechanical Properties of Oak (Quercus petraea Liebl.) Wood

EVALUACIÓN DE TRES ADHESIVOS EN LA FABRICACIÓN DE TABLEROS ENLISTONADOS DE Aspidosperma quebracho blanco ESTABILIZADO CON POLIETILENGLICOL

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