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- W4293491441 abstract "The development of bonding performance and cohesion of the constituent members is of great interest in the wood-based composites production process. This work presents an investigation for assessment of bondline in reinforced laminated veneer lumber . Phenol-formaldehyde was modified with silicon dioxide nanoparticles (SiO 2 -NPs), before applying as the binder. Experimentally, the bonding quality and durability were investigated based on penetration parameters, shear strength, apparent cohesive wood failure, and delamination ratio. Results verified that SiO 2 -NPs had catalytic impacts on the polymerization mechanism of phenol-formaldehyde resin. Bondline morphology was affected by SiO 2 -NPs presence, in a way that the penetration parameters were reduced under the influence of the viscosity rising and polymerization behavior of phenol-formaldehyde/nano SiO 2 composite. With the shorter hot-pressing time, the brittle resin failed cohesively in the bondline, while the reinforced bondline by phenol-formaldehyde/nano SiO 2 composite failed by delamination in the wood fibers. The highest shear strength in the core layer was recorded when 2% SiO 2 -NPs were presented in the bondline. The optimum shear strength and delamination ratio were observed at ≈ 135 and 330 μm penetration depth for effective penetration and maximum penetration, respectively. The SiO 2 -NPs promoted the bonding durability performance of the bondline, especially in the core layer of the laminated veneer lumbers with shortened hot-pressing time. This reinforced product indicated applicability of being used as a building material in high humid/exterior conditions. • SiO 2 -NPs showed catalytic effects on the curing process of PF resin. • Penetration parameters were reduced under the influence of the viscosity rising and polymerization behavior of PF/SiO 2 -NPs. • The maximum bonding durability was observed at ≈ 135 μm of effective resin penetration. • The SiO 2 -NPs promoted the durability performance of the core layers' bondline. • Promoted LVL passed Humid/Exterior class in terms of bonding quality." @default.
- W4293491441 created "2022-08-29" @default.
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- W4293491441 date "2022-11-01" @default.
- W4293491441 modified "2023-10-12" @default.
- W4293491441 title "Durability-related performance of reinforced bondline by phenol formaldehyde/nano SiO2 composite in Laminated Veneer Lumber (LVL)" @default.
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- W4293491441 doi "https://doi.org/10.1016/j.jobe.2022.105191" @default.
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