tailieunhanh - Effects of posttreatment with alkaline copper quat and copper azole on the mechanical properties of wood-based composites

The static bending strengths, modulus of rupture, and modulus of elasticity of 5 commercial wood-based composites [softwood plywood (SWP), hardwood plywood (HWP), medium density fiber-board (MDF), oriented strand board (OSB), and particleboard (PB)] were measured after a postmanufacture treatment of vacuum-impregnation with alkaline copper quat (ACQ) and copper azole (CA). | Turkish Journal of Agriculture and Forestry Research Article Turk J Agric For (2013) 37: 505-510 © TÜBİTAK doi: Effects of posttreatment with alkaline copper quat and copper azole on the mechanical properties of wood-based composites Cihat TAŞÇIOĞLU* Department of Forest Industrial Engineering, Faculty of Forestry, Düzce University, 81620 Düzce, Turkey Received: Accepted: Published Online: Printed: Abstract: The static bending strengths, modulus of rupture, and modulus of elasticity of 5 commercial wood-based composites [softwood plywood (SWP), hardwood plywood (HWP), medium density fiber-board (MDF), oriented strand board (OSB), and particleboard (PB)] were measured after a postmanufacture treatment of vacuum-impregnation with alkaline copper quat (ACQ) and copper azole (CA) (target retentions: , , and kg m–3 for ACQ; , , and kg m–3 for CA). Of the composites tested, SWP exceptionally sustained no damage to its bending strengths, regardless of preservative types and retentions. Others (HWP, MDF, OSB, and PB) were necessarily affected to some degree by posttreatments. In accordance with the dimensional stability and resistance to biological attacks, of the posttreated composites, SWP seems most suitable and implemental for posttreatment when the appropriate selection of treatment concentrations and schedules is made. Key words: Alkaline copper quat, copper azole, mechanical properties, posttreatment, wood-based composites 1. Introduction Wood-based composites have recently become widely utilized in the construction industry, mostly replacing solid lumber in nonstructural and structural applications (Laks 2002; Kirkpatrick and Barnes 2005). Since these composites are usually prone to biodegradation and biodeterioration when utilized in outdoor and ground contact conditions, proper protection is important to ensure their longer .

• Nông nghiệp
• Alkaline copper quat
• Copper azole
• Mechanical properties
• Wood based composites
• Vacuum impregnation