Effect of Nano-zinc oxide and adhesive type on Physical and Mechanical Properties of Laminated Strand Lumber

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MOHAMMADI H.; Mastary Farahani M.R.; YOUSEFI H.; HABIBPOUR B.

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Journal: Journal of Wood and Forest Science and Technology Year:2018 | Volume:25 | Issue:1 Page(s): 33-47

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Title

Effect of Nano-zinc oxide and adhesive type on Physical and Mechanical Properties of Laminated Strand Lumber

Author(s)

MOHAMMADI H. | Mastary Farahani M.R. | YOUSEFI H. | HABIBPOUR B. | Issue Writer Certificate

Keywords

Wood based compositesQ1

Laminated strand lumberQ1

Phenol formaldehydeQ2

Polymeric methylene diphenyl diisocyanatQ1

Nano Zink OxidQ1

Abstract

Background and objectives: One of the most widely used wood products applied in wooden buildings as load bearing posts or beams is Laminated strand lumber (LSL). Nano-zinc oxide is a chemical that has the potential to be used in the protection of LSL. The use of nano-zincoxide as an additive in LSL may affect its mechanical and physical properties. In this study, the effect of adhesive type (PF and pMDI) and nano-zinc oxide amount (0, 0. 5, 1, 1. 5 % based on strands weigth) on the physical and mechanical properties of LSL was investigated. Materials and methods: For this purpose, lSLs were made from Iranian beech using either a Phenol formaldehyde (PF) or a Polymeric methylene diphenyl diisocyanat(pMDI) adhesive and four loading levels of nano-zinc oxide. The mechanical and physical properties of the LSLs were then measured according to ASTM-D5456 and modified ASTM-D1037 respectively. Results: The results showed that the interaction between nano-zinc oxide treatment and the adhesive type was significant for MOE and IB while the interaction was not significant for MOR at the alpha level of 5%. Not only did nano-zinc oxide not reduce significantly the mechanical properties of the composites but it also increased partially the studied properties in most cases. Nano-zinc oxide with the lowest loading decreased the thickness swelling and improved the dimensional stability. The higher loadings did not result in any further improvement. Conclusion: In general, it can be concluded that the different levels of nano-zinc oxide can be used in treating Laminated strand lumber composites made with PF and pMDI adhesives without having any negative effect on mechanical properties of the composites.

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APA: Copy

MOHAMMADI, H., Mastary Farahani, M.R., YOUSEFI, H., & HABIBPOUR, B.. (2018). Effect of Nano-zinc oxide and adhesive type on Physical and Mechanical Properties of Laminated Strand Lumber. JOURNAL OF WOOD AND FOREST SCIENCE AND TECHNOLOGY, 25(1 ), 33-47. SID. https://sid.ir/paper/380149/en

Vancouver: Copy

MOHAMMADI H., Mastary Farahani M.R., YOUSEFI H., HABIBPOUR B.. Effect of Nano-zinc oxide and adhesive type on Physical and Mechanical Properties of Laminated Strand Lumber. JOURNAL OF WOOD AND FOREST SCIENCE AND TECHNOLOGY[Internet]. 2018;25(1 ):33-47. Available from: https://sid.ir/paper/380149/en

IEEE: Copy

H. MOHAMMADI, M.R. Mastary Farahani, H. YOUSEFI, and B. HABIBPOUR, “Effect of Nano-zinc oxide and adhesive type on Physical and Mechanical Properties of Laminated Strand Lumber,” JOURNAL OF WOOD AND FOREST SCIENCE AND TECHNOLOGY, vol. 25, no. 1 , pp. 33–47, 2018, [Online]. Available: https://sid.ir/paper/380149/en

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