Ultrasound-assisted extraction of bioactives as a strategic step for chemical pretreatments in nanocellulose production from acerola by-products

Autor(es)

Silva, Natalia Cristina ; Silva, Maycon Jhony ; Assis, Odilio Benedito Garrido ; Martelli-Tosi, Milena

• Tipo de documento: Artigo Científico
• Fonte: International Journal of Biological Macromolecules; v. 276, p. 8-pg., 2024-07-18.

Resumo

Acerola by-products (AB) have been used as raw material for extracting active compounds; however, there were no studies related to the use of the remaining acerola by-product (RAB) from this extraction. This portion still has fibers and can be used for the production of cellulose nanofibrils (CNFs); therefore, the main objective of this study was to evaluate the production of CNFs using AB and RAB and to investigate whether the extraction can be a treatment step before bleaching/acid hydrolysis. AB and RAB were characterized before and after being chemically treated (AB_CT and RAB_CT, respectively). The fibers extracted from the RAB showed the highest cellulose contents (RAB: 36.6 % and RAB_CT: 69.9 %), suggesting that the extraction process had an impact on by-product defibrillation. The same trends were observed for CNFs produced by acid hydrolysis. CNFs based on RAB showed higher yield (CNF_RAB: 25.2 % and CNF_RAB_CT: 24.2 %), higher crystallinity index (CNF_RAB: 68.3 % and CNF_RAB_CT: 71.7%) and higher thermal stability compared to CNFs extracted from AB and AB_CT. This study proved that it is feasible to use by-products after removing the active compounds for CNF production without other pre-treatments or in association with chemical treatment to obtain more crystalline and thermally stable CNFs. (AU)

• Processo FAPESP: 19/23171-1 - Aproveitamento de subprodutos obtidos após processamento de alimentos: extração de compostos fitoquímicos, encapsulação e aplicação em filmes / coberturas biodegradáveis
• Beneficiário: Milena Martelli Tosi
• Modalidade de apoio: Auxílio à Pesquisa - Regular
• Processo FAPESP: 22/03055-0 - Aproveitamento sustentável de fitoquímicos extraídos a partir de subprodutos agroindustriais: encapsulação, avaliação biológica e aplicação como aditivos alimentares
• Beneficiário: Milena Martelli Tosi
• Modalidade de apoio: Auxílio à Pesquisa - Projeto Inicial