AI Article Synopsis
- * Various chemical delignification methods and defibrillation cycles (10 and 20) were tested, showing that removing lignin led to better quality nanofibers with reduced width and improved properties like high crystallinity and thermal stability.
- * Higher shear forces and more cycles (20) resulted in better dispersion of nanofibrils and improved suspension stability, demonstrating the potential to utilize peach palm waste effectively in producing valuable nanocellulose.
Article Abstract
The large amount of residues generated by the peach palm agroindustry and its cellulose content (34 g 100g) motivated the present investigation, where outer sheaths were used for nanocellulose production through ultrafine grinding. Protocols combining different chemical delignification with defibrillation intensity (10 and 20 cycles) were applied and their influence over some properties and characteristics of nanofibers evaluated. At all protocols applied it was possible produce cellulose at nanometric level (widths ˜100 nm), with high crystallinity index (49.8-54.5%) and great thermal stability. The delignification influenced the defibrillation, where lignin removal resulted in well dispersed bundles of fibrils with lower widths. Lower lignin contents combined with higher shear forces released more nanofibrils, with more adsorbed water with defibrillation extension. These behavior influenced the suspension stability, that was higher at larger number of cycles (20). The results evidenced that was possible produced FNC with appropriate technical characteristics from pupunha discards.
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| http://dx.doi.org/10.1016/j.carbpol.2019.04.035 | DOI Listing |
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