Value aggregation of pine (Araucaria angustifolia) nuts agro-industrial waste by cellulose extraction

Araucaria (Araucaria angustifolia) is a tree species found in the Southeast and South of Brazil. It also known as Brazilian pine, presenting fruits high acceptance. However, its processing generates by-products that are little used. Thus, this work aimed to extract characterize cellulose obtained from pinion husk, well evaluate contents ash, lignin, ?-cellulose composition. The raw material extracted were characterized by X-ray fluorescence analysis (XRF), diffraction (XRD), Fourier transform infrared spectroscopy (FTIR) thermogravimetric (TGA). As for chemical composition detected, husks showed 1.6% 7% extractives, 34% lignin 55% cellulose, being 46% 9% hemicellulose. was observed XRD removal amorphous materials resulted gain crystallinity (from 19 33%). Proving efficiency extraction, characterization shown be purity, since main band cellulosic sample (TGA) disappeared. Finally, shows bark rich source making it possible obtain nanocrystals.