Nanocellulose Preparation from Cassava Bagasse via Hydrolysis by Sulfuric Acid and Hydrogen Peroxide Medium

The novel and facile multi-stage method was used for the preparation of nanocellulose from cassava bagasse in Vietnam. Firstly, the cassava bagasse was treated with sodium hydroxide solution followed by chlorine dioxide bleaching for obtaining cellulose pulp with a brightness of 82% ISO. Secondly, the obtained bleached cellulosic pulp was achieved with a dilute sulfuric acid and hydrogen peroxide followed by purification and refining for obtaining nanocellulose. The following optimal conditions of the acidic treatment with adding of hydrogen peroxide for isolation of nanocellulose were proposed: concentration of hydrogen peroxide 0.1 wt.%, the concentration of sulfuric acid 0.25 wt. %, liquor to cellulose ratio 20 to 1, temperature 110 ° C, time 100 min. The characteristics of nanocellulose were studied by SEM, FTIR, and XRD.