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Abstract
<title>Abstract</title> <p> The growing demand for sustainable materials has driven interest in nanocellulose derived from renewable resources. In this context, this study investigates the influence of different bleaching sequences on the production of nanocellulose from Eucalyptus urograndis pulp. Three bleaching sequences were evaluated: D <sub>0</sub> (E+P)D <sub>1</sub> P <sub>2</sub> , A <sub>HT</sub> DP <sub>2</sub> and A <sub>HT</sub> E <sub>HT</sub> DP <sub>1</sub> , <sub/> using an industrially bleached pulp as reference, followed by sulfuric acid hydrolysis and subsequent processing steps. The obtained nanocellulose presented heterogeneous size distribution, with widths between 30 and 40 nm and lengths close to 300 nm, resulting in high aspect ratios. Average yields were approximately 80% for all samples. No statistically significant influence of the bleaching sequences on nanocellulose dimensions or yield was observed.These results indicate that acid hydrolysis is the primary factor governing nanocellulose characteristics, while variations in bleaching conditions have a limited effect. This finding suggests that different pulp qualities can be used for nanocellulose production without compromising performance, providing greater flexibility for industrial applications. </p>