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OBTAINING CELLULOSE NANOCRYSTALS BY HYDROCHLORIC ACID FROM AGROINDUSTRIAL BAGASSE
The process of obtaining cellulose nanocrystals from agave bagasse Tequilana Weber var. Azul has acquired great importance because It’s a very abundant agroindustrial residue. Furthermore, in the literature it’s found that these nanomaterials are very relevant due to their abundance, strength, stiffness, low weight and biodegradability. In the present work, we report a study of hydrolysis with hydrochloric acid for the production of cellulose nanocrystals from these wastes; varying parameters such as temperature, reaction time and concentration. The cellulosic pulp was obtained from an alkaline cooking with NaOH and five stages of bleaching. The 1st stage with ClO2, 2nd with NaOH, 3rd with H2O2 and NaOH, 4th with ClO2 and 5to with NaOH. We obtained Kappa number = 23±3 %, percentage of alpha cellulose (α) = 94±3 %, viscosity (µ) = 11.53 cp, degree of polymerization (DP) = 830 Daltons and degree of brightness (B) = 76 %. The cellulose nanocrystals were characterized by DLS, FT-IR (compared with Whatman paper, which has a high degree of alpha cellulose) and AFM.