Resumo

COELHO DA COSTA, Ana Paula et al. Ammonium Persulfate Oxidation of Lignocellulosic Biomass and Acai Berry Biomass for the Extraction of Nanocrystalline Cellulose: A Review. Rev. ion [online]. 2022, vol.35, n.1, pp.67-93.  Epub 28-Out-2022. ISSN 0120-100X.  https://doi.org/10.18273/revion.v35n1-2022005.

The growing interest in the production of Cellulose Nanocrystals (CNCs) is due to the search for new materials. CNCs have shown good performance in polymeric composites because of their nanometric dimensions and strength. CNCs production have had a positive impact because of its low energy consumption, also any lignocellulosic biomass, different from wood can be used. The conventional extraction method of CNCs is the acid hydrolysis using sulfuric acid, hydrochloric acid or a mixture between them. Recently, alternative methods of extraction have aroused interest as they are eco-friendly and efficient. One of them highlights the use of inorganic persulfates solutions in a single process stage, where no pretreatment is necessary. Thus, the CNCs are extracted directly without the previous removal of lignin and hemicellulose. The main advantage of this method is the lower consumption of water, solvents and energy. On the other hand, marketing of acai pulp from the Amazonian region has had an accelerated growing in the internal and foreign markets because of the antioxidant, energetic and nutritious properties of the fruit. Consequently, the generation of biomass has been extrapolated, and the policies about better use of this resource are still modest, resulting in the random dispose and discard of these processing wastes and in environmental problems. This article presents a state- of-the-art of achievement on CNCs extraction through Ammonium Persulfate Oxidation of lignocellulosic biomass, and also the acai berry biomass.

Palavras-chave : Lignocellulosic biomass; Acai berry biomass; Cellulose nanocrystals; Ammonium persulfate oxidation.

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