Abstract
Sugarcane bagasse (SCB), an abundant agro-industrial residue in Vietnam, was used as a raw material to produce cellulose nanofibrils (CNF). First, SCB pulp was obtained from the raw material of bagasse using a two-fraction method, soda treatment followed by bleaching with Javel solution. Then, the SCB pulp was converted into nano-sized cellulose fibers by subjected to low energy, economical treatment of TEMPO-mediated oxidation. A traditional mechanical method of fibrillation SCB pulp, stone grinding was done for comparison, the produced nanocellulose is referred to as MeSCB. The nanocellulose fibers refer as TOSCB obtained from the TEMPO oxidation process were characterized in terms of carboxyl content, morphology, crystallinity and thermal stability. The degree of fibrillation and the dimension of the two obtained nanocelluloses was determined by applying FE-SEM observations combined with an image processing application, ImageJ. The results show that the MeSCB were much less nanofibrillated than the corresponding TOSCB material but less toxic.
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