Lignocellulosic Micro and Nanofibrillated Cellulose Produced by Steam Explosion for Wood Adhesive Formulations

The reinforcing impact of Lignocellulosic micro and nanofibrillated cellulose (L-MNFCs) obtained from Eucalyptus Globulus bark in Urea-Formaldehyde UF adhesive was tested. L-MNFCs were prepared by an environmentally friendly, low-cost process using a combination involving steam explosion followed refining ultra-fine grinding. Obtained showed web-like morphology with some aggregates lignin nanodroplets. They present mixture residual fibers fine elements width varying between 5 nm to 20 ?m, respectively. effects the addition low amounts (1% wt.) on properties three different adhesives (Urea-Formaldehyde UF, Phenol-Formaldehyde PF, Tannin-Hexamine TH) studied evolution pH, viscosity, mechanical properties. Results that viscosity PF increased L-MNFCs, unlike TH. Meanwhile, led better behavior for adhesives. Particleboards then modified amount 1% wt. sufficient increase internal bonding ?67%, modulus elasticity ?43%, rupture ?29%.