Caracterização do mesocarpo de coco verde e sua aplicação como compósito

Abstract

The development of alternatives for the use of the coconut shell allows the reduction of the inadequate disposal of solid residues and provides a new option of yield next to the production sites. The present work aims to evaluate the chemical properties of the mesocarp of the green coconut, its potential of use for extraction of tannins and its adhesive capacity in agglomerated panels made with green coconut residue, thus analyzing the use of mesocarp of green coconut in two segments Industries. The tannin extraction was done with water, with water added with 1% sodium sulfite, 5% and 8%. From these extractions, it was observed which of the extractions yielded the best yield and characteristics to be used as an adhesive agent. The tests were done on agglomerated sheets of coconut residue. The pressing was carried out at 3.92 MPa for 10 minutes at a temperature of 100 ° C. The physical-mechanical properties of the material were determined, following the recommendations of standard NBR 14810 (ABNT, 2013). The 5% sodium sulphite concentration allowed a higher yield in the extraction of tannins and their characteristics as an adhesive agent, the coconut tannic extracts presented values that meet the requirements of adhesive agent, as well as the solution of the same to 50%. The tannins extracted from the mesocarp of the green coconut present potential for use as adhesive in panels. The coconut mesocarp is a material with potential for panel production, showing values of density, absorption and swelling that meets the ABNT NBR 14810-2 standard, as well as the tannin extracted from it, can be used in the gluing of panels. However, it is necessary to improve the knowledge regarding its characteristics for the application of temperature, pressure and adhesive contents ideal to enhance its use