Desempenho físico-mecânico de compósito fabricado com fibra do epicarpo do côco babaçu (Orbignya Phalerata) e resíduos poliméricos

Abstract

This work aimed to obtain and characterize a composite material from agroenergetic and polymeric residues. It was composed of babassu coco epicarp fibers and different polymeric residues, using as a matrix the Urea-formaldehyde resin. The composite produced was analyzed for its physical, mechanical and morphological properties. The properties of moisture and density are according to the ABNT Standard 14810-2 (2014), for bonded wood sheets, except the PP20% composite that did not meet the density requirement. The swelling contents in thickness and water absorption obtained statistically better results, in the concentrations of 40% and 60% of resin. The addition of PP plastic residues in the structural matrix of the composite panels, promoted an increase in the performance of the mechanical properties of these, in relation to the PET residue. The mechanical properties MOE, MOR and the compressive strength of the composites were not influenced by the increase in UF resin content. In general, the produced composites obtained results compatible with the norms for the physical properties and in agreement with works referenced in the literature. The mechanical properties did not meet the norm and were inferior to the results obtained by other authors. Microscopic analysis by the MEV test allowed to verify the porosity and cracks of the UF resin, the high void content of the composite, the waxy surface of the fiber and consequently the low adhesion between the fiber and the matrix. Despite this, the use of babassu epicarp fibers for composite materials has a promising future and has been well studied. It is believed that the improvement of fiber preparation techniques and the use of technologies can improve the performance of the babassu epicarp fiber composite.