Alkaline Pretreatment Facilitate Mechanical Fibrillation ofUnbleached Cellulose Pulps for Obtaining of Cellulose micro/nanofibrils (MFC)

Registro completo de metadados
MetadadosDescriçãoIdioma
Autor(es): dc.creatorMendonça, Maressa-
Autor(es): dc.creatorDias, Matheus Cordazzo-
Autor(es): dc.creatorMartins, Caio Cesar Nemer-
Autor(es): dc.creatorDurães, Alisson Farley Soares-
Autor(es): dc.creatorDamásio, Renato Augusto Pereira-
Autor(es): dc.creatorTonoli, Gustavo Henrique Denzin-
Data de aceite: dc.date.accessioned2026-02-09T11:59:15Z-
Data de disponibilização: dc.date.available2026-02-09T11:59:15Z-
Data de envio: dc.date.issued2024-09-24-
Data de envio: dc.date.issued2024-09-24-
Data de envio: dc.date.issued2022-06-22-
Fonte completa do material: dc.identifierhttps://repositorio.ufla.br/handle/1/59489-
Fonte completa do material: dc.identifierhttps://doi.org/10.1080/15440478.2022.2092252-
Fonte: dc.identifier.urihttp://educapes.capes.gov.br/handle/capes/1151875-
Descrição: dc.descriptionAs licenças de acesso aberto aplicáveis a este artigo estão em conformidade com as políticas do periódico em que foi publicado, disponíveis no link: https://v2.sherpa.ac.uk/id/publication/5687. Consulta realizada em 24 de set. de 2024.-
Descrição: dc.descriptionEnergy expenditure is a limiting factor for the production of cellulose micro/nanofibrils in mechanical processing. This study evaluated the effect of novel alkaline pretreatments on unbleached Eucalyptus sp. pulps (hardwood) and Pinus sp. cellulose (softwood) to facilitate the production of cellulose nanofibrils by mechanical fibrillation and reduce the energy consumed by the mill. Pretreatments with NaOH in concentrations of 5% for 2 h and 10% for 1 h and 2 h and a hybrid pretreatment with 5%/16% NaOH/ H2O2 for 2 h were evaluated. The 10% pre-treatment was done at 1 h and 2 h to evaluate the effect of the less aggressive treatment (1 h). The morphology, chemical composition, turbidity of the fibers/suspensions, mechanical properties, fibrillation quality index and energy expended during the fibrillation were evaluated for each pretreatment. The less aggressive pretreatments produced micro/nanofibrils with fewer passes of the pulp through the fibrillator, which effectively facilitated extraction with lower energy consumption. The hybrid pretreatment did not show satisfactory results in reducing energy consumption, and the quality of the nanofibrils produced by this pre-treatment was inferior to the others. This study showed innovation in performing novel and efficient NaOH and hybrid (NaOH/H202) pretreatments on commercial unbleached pulps to obtain pulp micro/nanofibrils.-
Formato: dc.formatapplication/pdf-
Idioma: dc.languagept_BR-
Publicador: dc.publisherTaylor & Francis Group-
Direitos: dc.rightsAttribution 4.0 International-
Direitos: dc.rightsAttribution 4.0 International-
Direitos: dc.rightsacesso aberto-
Direitos: dc.rightshttp://creativecommons.org/licenses/by/4.0/-
Direitos: dc.rightshttp://creativecommons.org/licenses/by/4.0/-
???dc.source???: dc.sourceJournal of Natural Fibers-
Palavras-chave: dc.subjectFibras de celulose-
Palavras-chave: dc.subjectMicrofibrilas de celulose-
Palavras-chave: dc.subjectNanofibrilas de celulose-
Palavras-chave: dc.subjectTratamento alcalino-
Palavras-chave: dc.subjectEnergia de fibrilação-
Palavras-chave: dc.subjectPropriedades mecânicas-
Palavras-chave: dc.subjectSuspensões de fibra-
Palavras-chave: dc.subjectCellulose fibers-
Palavras-chave: dc.subjectMicrofibrillated cellulose-
Palavras-chave: dc.subjectCellulose nanofibers-
Palavras-chave: dc.subjectAlkaline treatment-
Palavras-chave: dc.subjectFibrillation energy-
Palavras-chave: dc.subjectMechanical properties-
Palavras-chave: dc.subjectFiber suspensions-
Título: dc.titleAlkaline Pretreatment Facilitate Mechanical Fibrillation ofUnbleached Cellulose Pulps for Obtaining of Cellulose micro/nanofibrils (MFC)-
Tipo de arquivo: dc.typeArtigo-
Aparece nas coleções:Repositório Institucional da Universidade Federal de Lavras (RIUFLA)

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