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| 17. | | SANTOS, E. O. dos; SANTOS, R. S.; OLIVEIRA, L. C. de. Determinação do nível de dano causado por Tetranychus ogmophallos (Acari: Tetranychidae) em amendoim forrageiro no Estado do Acre. In: SEMINÁRIO DA EMBRAPA ACRE DE INICIAÇÃO CIENTÍFICA E PÓS-GRADUAÇÃO, 3., 2020, Rio Branco, AC. Ciência e tecnologia na sociedade digital (edição on-line): anais. Rio Branco, AC: Embrapa Acre, 2021. p. 53-58. Apresentação oral. (Embrapa Acre. Eventos técnicos & científicos, 3). Editores: Virgínia de Souza Álvares, Fabiano Marçal Estanislau.| Biblioteca(s): Embrapa Acre. |
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 | Acesso ao texto completo restrito à biblioteca da Embrapa Instrumentação. Para informações adicionais entre em contato com cnpdia.biblioteca@embrapa.br. |
Registro Completo
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Biblioteca(s): |
Embrapa Instrumentação. |
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Data corrente: |
05/07/2023 |
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Data da última atualização: |
05/07/2023 |
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Tipo da produção científica: |
Artigo em Periódico Indexado |
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Circulação/Nível: |
A - 1 |
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Autoria: |
SETTER, C.; MASCARENHAS, A. R. P.; DIAS, M. C.; MEIRA, A. C. F. O.; CARVALHO, N. T. S.; LOURENÇO, M. S.; MARTINS, M. A.; TONOLI, G. H. D.; OLIVEIRA, T. J. P. de. |
|
Afiliação: |
MARIA ALICE MARTINS, CNPDIA. |
|
Título: |
Surface modification of cellulosic nanofibrils by spray drying: Drying yield and microstructural, thermal and chemical characterization. |
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Ano de publicação: |
2023 |
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Fonte/Imprenta: |
Industrial Crops & Products, v. 201, 116899, 2023. |
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Páginas: |
1 - 15 |
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ISSN: |
0926-6690 |
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DOI: |
https://doi.org/10.1016/j.indcrop.2023.116899 |
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Idioma: |
Inglês |
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Conteúdo: |
This study investigated the effect of the addition of cationic surfactant cetyltrimethylammonium bromide (CTAB) in cellulose nanofibril suspensions (CNF) on the efficiency of the spray drying process, as well as on the properties of the dried microparticles and on their water redispersibility. The results indicated that CNF pretreated with 10% sodium silicate and modified with surfactant resulted in higher drying yields. The particle sizes formed by drying depended on the characteristics of the precursor CNF, in general, the particles were smaller than 8 µm. The crystalline fraction of all particles produced was higher than that of never dried (ND) CNF, furthermore the powders were thermostable at elevated temperatures (>200 ◦C), which provides good evidence for applications in composites. Water stability showed that the rehydrated cellulose solutions were influenced by the treatments and the drying process. The addition of surfactant proves attractive to increase the spray drying yield of CNF, bringing prospects regarding cost reduction and expansion of CNF commercialization. Furthermore, the results provide fundamental insights into the relationship between the surface modification of CNF associated with the drying process with the characteristics of the spray-dried material. |
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Palavras-Chave: |
Nanofibrillated cellulose; Redispersion; Spray dryer; Surfactant. |
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Categoria do assunto: |
-- |
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Marc: |
LEADER 02250naa a2200301 a 4500
001 2154808
005 2023-07-05
008 2023 bl uuuu u00u1 u #d
022 $a0926-6690
024 7 $ahttps://doi.org/10.1016/j.indcrop.2023.116899$2DOI
100 1 $aSETTER, C.
245 $aSurface modification of cellulosic nanofibrils by spray drying$bDrying yield and microstructural, thermal and chemical characterization.$h[electronic resource]
260 $c2023
300 $a1 - 15
520 $aThis study investigated the effect of the addition of cationic surfactant cetyltrimethylammonium bromide (CTAB) in cellulose nanofibril suspensions (CNF) on the efficiency of the spray drying process, as well as on the properties of the dried microparticles and on their water redispersibility. The results indicated that CNF pretreated with 10% sodium silicate and modified with surfactant resulted in higher drying yields. The particle sizes formed by drying depended on the characteristics of the precursor CNF, in general, the particles were smaller than 8 µm. The crystalline fraction of all particles produced was higher than that of never dried (ND) CNF, furthermore the powders were thermostable at elevated temperatures (>200 ◦C), which provides good evidence for applications in composites. Water stability showed that the rehydrated cellulose solutions were influenced by the treatments and the drying process. The addition of surfactant proves attractive to increase the spray drying yield of CNF, bringing prospects regarding cost reduction and expansion of CNF commercialization. Furthermore, the results provide fundamental insights into the relationship between the surface modification of CNF associated with the drying process with the characteristics of the spray-dried material.
653 $aNanofibrillated cellulose
653 $aRedispersion
653 $aSpray dryer
653 $aSurfactant
700 1 $aMASCARENHAS, A. R. P.
700 1 $aDIAS, M. C.
700 1 $aMEIRA, A. C. F. O.
700 1 $aCARVALHO, N. T. S.
700 1 $aLOURENÇO, M. S.
700 1 $aMARTINS, M. A.
700 1 $aTONOLI, G. H. D.
700 1 $aOLIVEIRA, T. J. P. de
773 $tIndustrial Crops & Products$gv. 201, 116899, 2023.
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