Effects of Nano-Silane on the Physical and Mechanical Properties of Oriented Strand Lumber (Osl)

Abstract

Cette étude s'est penchée sur les effets de la teneur en résine et en composés de nano-silane (NS) sur les panneaux structuraux orientés (OSB), un important produit en bois reconstitué. Des panneaux OSB ont été fabriqués avec de la résine d'urée-formaldéhyde (UF) à 8 % et à 10 % (sur poids sec des panneaux), avec application de NS à deux teneurs en fonction de la teneur en résine UF. Nos résultats montrent que les traitements aux deux teneurs différentes en résine donnent des valeurs très proches pour les modules de rupture et d'élasticité, la flexion au choc et la résistance à la traction. Cela indique que la compacité élevée des lamelles de la matrice OSB est le facteur déterminant des propriétés mécaniques globales des panneaux composites. L'interaction entre NS et résine UF affaiblit significativement ces propriétés dans la plupart des cas de traitement à 10 % NS, alors que le dosage de NS à 20 % est suffisant pour contribuer activement au processus de collage des lamelles et compense les pertes en partie. L'analyse par cluster indique que les propriétés mécaniques sont générale-ment davantage fonction de la compacité de la matrice composite que de la teneur en résine. Dès lors, l'étude conclut que le NS n'est pas à recommander à l'industrie en raison de ses effets négatifs sur la plupart des propriétés physiques et méca-niques des panneaux OSB.Mots-clés : nanomatériaux, panneaux structuraux orientés (OSB), panneaux de particules, composé de silane, bois composite, Zycosil, Iran. ABSTRACT EFFECTS OF NANO-SILANE ON THE PHYSICAL AND MECHANICAL PROPERTIES OF ORIENTED STRAND LUMBER (OSL)The effects of resin content and nano-silane (NS) compounds on oriented strand lumber (OSL), an important engineered wood product, were studied here. OSL panels were produced using two different urea-formaldehyde (UF) resin contents of 8% and 10%, based on the dry weight of the wood strips; two NS contents were applied based on the UF resin content. Our results show that treatments with the two different resin contents produce very similar values for modulus of rupture (MOR), modulus of elasticity (MOE), impact bending (IB), and tensile strength (TS). This revealed that the high compactness of strips in the OSL matrix was the predominant factor determining the overall mechanical properties of the composite panels. The interaction between NS and UF-resin significantly reduced these properties with most treatments at 10% NS, while 20% NS was enough to contribute actively to the process of binding the strips together and compensated for part of the loss. Cluster analysis indicated that the mechanical properties were generally dependent on the compactness of the composite matrix rather than on the resin content. Based on these findings, the study concluded that NS is not to be recommended to the industry because of its negative effects on most physical and mechanical properties in OSL panels.Keywords: nano-materials, oriented strand lumber (OSL), particleboard, silane compounds, wood-composite, zycosil , Iran. RESUMEN EFECTOS DE LOS ...

Mechanical and Physical Properties of Oriented Strand Lumber (OSL): The Effect of Fortification Level of Nanowollastonite on UF Resin

“…At this resin content, it seems that nanowollastonite caused poor wetting of wood strips since the majority of failures were due to the resin and not to the wood. Another possible explanation for this behavior may be the absorption or gathering of resin molecules by wollastonite nanofibers, preventing them from being active in the process of sticking the strips together [39,40,41].…”

Influence of strand size, board density, and adhesive type on characteristics of oriented strand lumber boards manufactured from pine strands

“…Although in industrial practice the shape of wood particles is irregular, except for veneerbased materials, they are still described by linear dimensions of a parallelepiped. For wood particles used to manufacture OSL in laboratory conditions, linear dimensions are within the following ranges: 78 mm to 142 mm long, 9 mm to 60 mm wide, and 0.55 mm to 0.75 mm thick (Preechatiwong et al 2007;Beck et al 2009;Taghiyari et al 2016). Generally, the material used in the studies is of a uniform size fraction, and the thickness of the manufactured boards is less than 20 mm, mainly due to technical limitations.…”

Effects of different nanoclay loadings on the physical and mechanical properties of Melia composita particle board

“…Addition of Cloisite 30B resulted in significant improvement in mechanical properties of wood polymer composites (Samariha et al, 2015). However there is report of compactness of strips having more effect on oriented strand lumber when prepared with different concentration of UF resin along with nano-silane (Taghiyari et al, 2016a). One of the ways to decrease the formaldehyde emission of the UF boned panels is to use nano-fillers such as nanoclay and nano-SiO 2 because these materials have strong absorbability as well as high barrier property (Roumeli et al, 2012).…”