Acid hydrolysis has recently become the most often used technique, because it has a long industrial history (Abe & Yano, 2009; Teixeira et al„ 2011). Sulfuric acid is usually the reagent of choice: it efficiently cleaves the glycosidic bonds existing between the cellulose chains and prevents the CNFs from agglomerating, to generate stable colloidal suspensions (Pirani & Hashaikeh, 2013). However, acid hydrolysis is corrosive, modifies the cellulose surface, and produces chemical waste (Satyamurthy et al„ 2011).