Data/hora: 21/06/2024 12:02:28

Biblioteca(s): | Embrapa Agroindústria de Alimentos; Embrapa Florestas.
Tipo da produção científica: | Artigo em Periódico Indexado
Circulação/Nível: | A - 1
Data corrente: | 04/11/2020
Data da última atualização: | 09/02/2021
Autoria: | FURTADO, M. R.; MATTA, V. M. da; CARVALHO, C. W. P. de; MAGALHAES, W. L. E.; ROSSI, A. L.; TONON, R. V.
Afiliação: | Maraysa R. Furtado, Instituto de Química, Universidade Federal do Rio de Janeiro; VIRGINIA MARTINS DA MATTA, CTAA; CARLOS WANDERLEI PILER DE CARVALHO, CTAA; WASHINGTON LUIZ ESTEVES MAGALHAES, CNPF; André L. Rossi, Centro Brasileiro de Pesquisas Físicas, Rio de Janeiro; RENATA VALERIANO TONON, CTAA.
Título: | Characterization of spray-dried nanofibrillated cellulose and effect of different homogenization methods on the stability and rheological properties of the reconstituted suspension.
Ano de publicação: | 2021
Fonte/Imprenta: | Cellulose, v. 28, n. 1, p. 207-221, Jan. 2021.
DOI: | https://doi.org/10.1007/s10570-020-03516-9
Idioma: | Inglês
Conteúdo: | In the present study, a suspension of nanofibrillated cellulose from eucalyptus was spraydried in order to obtain a powdered material that could be easily transported and stored. The original suspension and the dried material were characterized for their physical, morphological and thermal properties. An increase in crystallinity and reduction in thermal stability were observed after drying. In addition, the fibrils size passed from nano to micro scale The powder obtained was rehydrated and homogenized by two methods: rotor-stator homogenization (5000, 10,000 and 15,000 rpm) and ultrasound (10, 30 and 50% maximum amplitude), during 3 and 5 min, in order to verify the possibility of obtaining a stable reconstituted suspension comparable to the original one. Higher treatment intensities resulted in suspensions with higher viscosity and stability. The suspension homogenized by ultrasound at 50% amplitude for 5 minutes was the most stable one and restored the nano dimensions of the original suspension. Both the original and the reconstituted suspensions showed a shear thinning and ??gel-like?? behavior. Higher UltraTurrax speed and ultrasound amplitude resulted in higher viscoelastic modulus (G0 and G00), although these values were lower than those found in the initial nanocellulose suspension.
Palavras-Chave: | Morphology; Nanocellulose; Nanocelulose; Propriedade térmica; Reconstitution; Reologia.
Thesaurus Nal: | Rheology; Spray drying; Thermal properties.
Categoria do assunto: | X Pesquisa, Tecnologia e Engenharia
Registro original: | Embrapa Agroindústria de Alimentos (CTAA)

Exemplares:

CTAA - (15048-1) - UPC - AP - DD -  -  -  - DIS
CNPF - (57479-1) - UPC - AP - DD -  -  -  - DIS