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Registro Completo |
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Biblioteca(s): |
Embrapa Agroindústria Tropical; Embrapa Algodão. |
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Data corrente: |
07/01/2020 |
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Data da última atualização: |
20/01/2020 |
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Tipo da produção científica: |
Artigo em Periódico Indexado |
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Autoria: |
ANDRADE, F. K.; MORAIS, J. P. S.; MUNIZ, C. R.; NASCIMENTO, J. H. O. DO; VIEIRA, R. S.; GAMA, F. M. P. DA; ROSA, M. de F. |
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Afiliação: |
FÁBIA KARINE ANDRADE, Universidade Federal do Ceará - UFC/Departamento de Engenharia Química; JOAO PAULO SARAIVA MORAIS, CNPA; CELLI RODRIGUES MUNIZ, CNPAT; JOSÉ HERIBERTO OLIVEIRA DO NASCIMENTO, Universidade Federal doRio Grande do Norte - UFRN/Departamento de Engenharia; RODRIGO SILVEIRA VIEIRA, Universidade Federal do Ceará - UFC/Departamento de Engenharia Química; FRANCISCO MIGUEL PORTELA DA GAMA, IBB, Institute for Biotechnology and Bioengineering,University of Minho, Braga, Portugal; MORSYLEIDE DE FREITAS ROSA, CNPAT. |
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Título: |
Stable microfluidized bacterial cellulose suspension. |
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Ano de publicação: |
2019 |
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Fonte/Imprenta: |
Cellulose, v. 26, n. 10, p. 5851-5864, July 2019. |
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DOI: |
. DOI: https://doi.org/10.1007/s10570-019-02512-y |
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Idioma: |
Inglês |
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Conteúdo: |
In this work, nanofibrillated suspensions of bacterial cellulose (BC) were produced via microfluidization. The effects of the size of the openings of the microfluidizer chamber and ultrasonication on the nanofibril properties were evaluated. The results of the X-ray diffraction analysis indicated a considerable reduction in BC crystallinity (86?65%) and crystallite size (5.8?4.0 nm) after microfluidization and ultrasonication. Thermal analysis showed a remarkable reduction from 337 to 283ªC in the initial temperature of degradation along the several steps of BC deconstruction. Moreover, infrared analysis indicated that both processes led to an increase in the Ib content (43?66%) of the fibers. Morphological analysis showed that the fibrillation process used exposed the internal faces of the ribbon-like nanofibrils, and thus, increased the surface area of the cellulose network, and produced fibers with a high aspect ratio (L/d). A thermally stable nanofibrillated suspension could be obtained by adding carboxymethyl cellulose as a simple and effective way to maintain cellulose fibers dispersed in the solution during sterilization by autoclaving. |
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Palavras-Chave: |
Celulose bacteriana; Celulose nanofibrilada; Microfluidização; Microfluidization; Nanofibrillated cellulose; Sterilization. |
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Thesagro: |
Celulose; Esterilização. |
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Categoria do assunto: |
-- |
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URL: |
https://ainfo.cnptia.embrapa.br/digital/bitstream/item/208760/1/Stable-microfluidized-bacterial.pdf
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Marc: |
LEADER 02053naa a2200301 a 4500
001 2118741
005 2020-01-20
008 2019 bl uuuu u00u1 u #d
024 7 $a. DOI: https://doi.org/10.1007/s10570-019-02512-y$2DOI
100 1 $aANDRADE, F. K.
245 $aStable microfluidized bacterial cellulose suspension.$h[electronic resource]
260 $c2019
520 $aIn this work, nanofibrillated suspensions of bacterial cellulose (BC) were produced via microfluidization. The effects of the size of the openings of the microfluidizer chamber and ultrasonication on the nanofibril properties were evaluated. The results of the X-ray diffraction analysis indicated a considerable reduction in BC crystallinity (86?65%) and crystallite size (5.8?4.0 nm) after microfluidization and ultrasonication. Thermal analysis showed a remarkable reduction from 337 to 283ªC in the initial temperature of degradation along the several steps of BC deconstruction. Moreover, infrared analysis indicated that both processes led to an increase in the Ib content (43?66%) of the fibers. Morphological analysis showed that the fibrillation process used exposed the internal faces of the ribbon-like nanofibrils, and thus, increased the surface area of the cellulose network, and produced fibers with a high aspect ratio (L/d). A thermally stable nanofibrillated suspension could be obtained by adding carboxymethyl cellulose as a simple and effective way to maintain cellulose fibers dispersed in the solution during sterilization by autoclaving.
650 $aCelulose
650 $aEsterilização
653 $aCelulose bacteriana
653 $aCelulose nanofibrilada
653 $aMicrofluidização
653 $aMicrofluidization
653 $aNanofibrillated cellulose
653 $aSterilization
700 1 $aMORAIS, J. P. S.
700 1 $aMUNIZ, C. R.
700 1 $aNASCIMENTO, J. H. O. DO
700 1 $aVIEIRA, R. S.
700 1 $aGAMA, F. M. P. DA
700 1 $aROSA, M. de F.
773 $tCellulose$gv. 26, n. 10, p. 5851-5864, July 2019.
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Registro original: |
Embrapa Algodão (CNPA) |
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| 13. |  | BOURASSET, A.-X.; COSTE, C.; GARCIA, G.; GIGAULT, J.; LAUNOIS, M.; MONARD-JAHIEL, A. Mission conjointe NMA/PRIFAS d´étude et de prospective dans Le Sudeste du Bresil, du 27 octobre au 10 novembre 1990. Montpellier: CIRAD-PRIFAS; Campinas: Embrapa-NMA, 1991. 27 p. apostila, A4 (D., 405)| Tipo: Comunicado Técnico/Recomendações Técnicas |
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