Effect of an oil heat treatment on the leachability and biological resistance of boric acid impregnated wood
2007
Lyon, Florent | Thevenon, Marie-France | Hwang, Won-Joung | Imamura, Yuji | Gril, Joseph | Pizzi, Antonio | Laboratoire de Mécanique et Génie Civil (LMGC) ; Université de Montpellier (UM)-Centre National de la Recherche Scientifique (CNRS) | Département Performances des systèmes de production et de transformation tropicaux (Cirad-PERSYST) ; Centre de Coopération Internationale en Recherche Agronomique pour le Développement (Cirad) | Kyoto University | Laboratoire d’Etude et de Recherche sur le Matériau Bois (LERMAB) ; Institut National de la Recherche Agronomique (INRA)-AgroParisTech-Université Henri Poincaré - Nancy 1 (UHP)
International audience
显示更多 [+] 显示较少 [-]英语. Vegetable oils provide boron retention of about 30% of initial amount depending on oil drying properties. Linseed oil is the most efficient, followed by soybean oil and rapeseed oil. Durability of C. japonica and F. crenata wood specimens has been enhanced by application of linseed oil alone but not enough to reduce termite’s attack of Coptotermes formosanus. Treating wood with a 1.0% w/w boric acid solution prior to oil treatment protects C. japonica from termite and fungi degradations. Efficiency against termites is mainly due to boron retention by oil but hydrophobic oil also forms a barrier decreasing fungi penetration. Boron efficacy threshold around 0.7 kg/m3BAE, lower than classical boron treatments thresholds indicates that oil water-repellence reinforces boron biostatic effect.
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