COMPOZITES ADHESIVES BASED ON SYNTHETIC AND LIGNOCELLULOSIC MONOMERS

Abstract

Important progress has been made nowadays in development of new composites engineering materials from renewable, large available lignocellulosic waste materials, as a more sustainable alternative to raw materials from fossil sources. Our research has been focused on synthesis and characterization of some new composites adhesives based on woody wastes fillers ammonium, aluminium and iron and chromium lignosulfonates, as partial substitutes for toxic synthetic monomers phenol and formaldehyde in synthesis of phenol-formaldehyde resins (matrix). The improvements achieved, by using the lignosulfonates, in the properties of the new composites resins phenol-formaldehyde-lignin derivatives consist on decrease in adhesive viscosity, better water resistance of finished boards, increasing of the pot life, resistance to biodegradation and low costs.