The use of black liquor reinforced with lignocellulose Nano fibers to improve the mechanical and physical properties of particleboard

Abstract
Background and aims: The aim of this research is provide a combination of urea-formaldehyde adhesive and black liquor and its properties were reinforced with lignocellulose Nano fiber for particle boards manufacturing.
Method and materials: In this study, the ratio of black liquor to urea-formaldehyde adhesive was as 0:100, 10:90, 30:70, and 50:50 percent, respectively. Press temperature was used at two levels of 180, and 200 c0 and lignocellulose Nano fiber at two levels 0 and 2 percent based on oven dried weight of urea-formaldehyde adhesive.
Results: Mechanical and physical properties (modulus of rupture, internal bonding, water absorption and thickness swelling after 2 and 24h soaking in water) of the produced boards were measured. The results showed that increasing black liquor resulted in decreasing the mechanical and physical properties boards. The results also indicated that mechanical and physical properties improved with increased press temperature and lignocellulose Nano fiber percent.
Conclusions: The results show that increasing black liquor decreasing the mechanical and physical properties. As well, press temperature and lignocellulose Nano fiber percent improved the mechanical and physical properties