Painéis de partículas elaborados com caule da mandioca como alternativa ao MDF utilizado na construção civil

Abstract

Due to man's action in extracting natural resources, there is a need to search for new sustainable solutions. Thus, the present work aimed to verify the potential of the cassava stem for the preparation of wooden panels to replace MDF (medium density fiberboard), customarily used in the civil construction sector. The methodology consisted of physical and mechanical characterization tests (density, flexural strength and modulus of elasticity). For the manufacture of the panels, 0%, 5%, 10%, 15% and 20% urea-formaldehyde resin were used in replacement to fiber mass. The panels were formed in a thermo-hydraulic press at a temperature of 220 ºC and pressures of 17.5 and 26.25 kgf / cm², for 15 minutes. The 15% and 20% ratios showed better rupture (MOR) and elasticity (MOE) modules, respectively. However, the panels without resin may represent a potential path for the production of panels with an alternative material, as it would be within the limits of the minimal flexural strength required by current regulations. In addition, it is a less harmful material, since the most common panels used in civil construction use binders such as urea-formaldehyde in the manufacturing process.