USE OF COCONUT FIBERS (COCOS NUCIFERA) AS AN ALTERNATIVE LIGNOCELLULOSIC SOURCE TO OBTAIN NANOCELLULOSIS BY MECHANICAL DEFIBRILLATION FOR MISCELLANEOUS APPLICATIONS

摘要

in this invention, coconut fibers that constitute a bulky lignocellulosic residue that is discarded by the coconut processing industries (water, pulp) are used to obtain nanocellulose. a process for obtaining nanocellulose is described, which consists of cutting the fibers, followed by treatment in water at 50-60¿ / 1h (twice, with water change), treatment with 2% sodium hydroxide w / b 90 / 2h (twice, changing the solution and washing the fibers with water after each treatment), delignification treatment with 1.5g of sodium chlorite for every 10g of 80% fibers and 10 drops of glacial acetic acid in 160ml of distilled water during 80¿ / 1h (three times, changing the solution and washing the fibers with water after each treatment), suspension of fibers in water with a consistency between (0.1-4.0%) was treated by defibrillation mechanical in a colloidal type mill, with rotation speed of 1500rpm and opening between stones of 0.1? 0.5mm. the product (nanocellulose) can be applied to increase barrier properties and / or mechanically reinforce paper, packaging, polymer blends, polymer matrices (forming composites) and adhesives as well as rheology and texture modifier in cosmetics, food and paints.