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(Referência obtida automaticamente do Web of Science, por meio da informação sobre o financiamento pela FAPESP e o número do processo correspondente, incluída na publicação pelos autores.)

Low-energy preparation of cellulose nanofibers from sugarcane bagasse by modulating the surface charge density

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Autor(es):
Pinto, Lidiane O. [1, 2] ; Bernardes, Juliana S. [2] ; Rezende, Camila A. [1]
Número total de Autores: 3
Afiliação do(s) autor(es):
[1] Univ Estadual Campinas, Inst Chem, POB 6154, BR-13083970 Campinas, SP - Brazil
[2] Brazilian Ctr Res Energy & Mat CNPEM, Brazilian Nanotechnol Natl Lab LNNano, POB 6192, BR-13083970 Campinas, SP - Brazil
Número total de Afiliações: 2
Tipo de documento: Artigo Científico
Fonte: Carbohydrate Polymers; v. 218, p. 145-153, AUG 15 2019.
Citações Web of Science: 1
Resumo

In this work, cellulose nanofibers (CNF) were obtained from sugarcane bagasse (SC) without high-energy mechanical treatments, using TEMPO-mediated oxidation. Variable NaClO concentrations were used to impart electrostatic repulsion between surface charged groups thus facilitating fibril separation. CNFs with diameters in the 3-5 nm range were obtained by oxidation of SC pulp with NaClO at 25 and 50 mmol/g. After a 30 min-sonication step, these CNFs were broken down into cellulose nanocrystals (CNC) by mechanical action. Both CNF and CNC preparation by this method are possible in SC due to its particular cell wall morphology and were not achieved in eucalyptus biomass, which is more recalcitrant. This work provided thus a new pathway to modulate the final morphology of cellulose particles by combining a low recalcitrant raw material with different surface charge densities. (AU)

Processo FAPESP: 16/04514-7 - Estudo do uso de nanopartículas de celulose no controle reológico de fluidos complexos
Beneficiário:Juliana da Silva Bernardes
Linha de fomento: Auxílio à Pesquisa - Programa BIOEN - Regular
Processo FAPESP: 16/13602-7 - Estudo sobre estratégias para o aproveitamento integral da biomassa lignocelulósica
Beneficiário:Camila Alves de Rezende
Linha de fomento: Auxílio à Pesquisa - Programa BIOEN - Regular