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 | Acesso ao texto completo restrito à biblioteca da Embrapa Florestas. Para informações adicionais entre em contato com cnpf.biblioteca@embrapa.br. |
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Registro Completo |
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Biblioteca(s): |
Embrapa Florestas. |
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Data corrente: |
14/03/2025 |
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Data da última atualização: |
14/03/2025 |
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Tipo da produção científica: |
Artigo em Periódico Indexado |
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Autoria: |
PETERSOHN JUNIOR, E.; PIRES, C.; FREITAS, R. A. de; MAGALHAES, W. L. E. |
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Afiliação: |
EGON PETERSOHN JUNIOR, UNIVERSIDADE FEDERAL DO PARANÁ; CASSIANO PIRES, UNIVERSIDADE FEDERAL DO PARANÁ; RILTON ALVES DE FREITAS, UNIVERSIDADE FEDERAL DO PARANÁ; WASHINGTON LUIZ ESTEVES MAGALHAES, CNPF. |
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Título: |
Effect of the adition of hydroxypropyl methylcellulose and hydroxyethyl cellulose on the rheological properties and thermogravimetric kinetics of dried and redispersed microfibrillated cellulose. |
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Ano de publicação: |
2025 |
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Fonte/Imprenta: |
Fibers and Polymers, 2025, 1229-9197, 2025. |
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DOI: |
https://doi.org/10.1007/s12221-025-00890-8 |
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Idioma: |
Inglês |
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Conteúdo: |
Hydroxypropyl Methylcellulose (HPMC) and Hydroxyethyl Cellulose (HEC) were added in variable amounts (5–30% w/w) to microfibrillated cellulose (MFC) and after homogenization the blends were dried by spray drying and redispersed by sonication. The dispersions were characterized through oscillatory rheometric measurements, where amplitude, frequency and viscosity sweeps were performed. For redispersed blend samples, when compared to redispersed MFC and never-dried blends, the addition of HPMC and HEC resulted in an increase in storage and loss moduli, an increase in apparent viscosity and thixotropy, as well as greater stability. The use of sonication also showed significant effects for never-dried MFC suspensions and their blends, with increased moduli and viscosity. Furthermore, the dry blends in a ratio of 70:30 were studied for thermal stability and thermogravimetric kinetics, where interactions between the polymers were confirmed. The results showed a decrease in thermal stability and activation energy of the blends, which is probably a result of the decrease in cellulose intrachain and interchain hydrogen bonds. |
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Palavras-Chave: |
Cinética termogravimétrica; Hydroxyethyl cellulose; Hydroxypropyl methylcellulose; Sonicação; Sonication. |
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Thesagro: |
Celulose; Propriedade Reológica. |
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Thesaurus Nal: |
Cellulose. |
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Categoria do assunto: |
K Ciência Florestal e Produtos de Origem Vegetal |
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Marc: |
LEADER 02062naa a2200265 a 4500
001 2173928
005 2025-03-14
008 2025 bl uuuu u00u1 u #d
024 7 $ahttps://doi.org/10.1007/s12221-025-00890-8$2DOI
100 1 $aPETERSOHN JUNIOR, E.
245 $aEffect of the adition of hydroxypropyl methylcellulose and hydroxyethyl cellulose on the rheological properties and thermogravimetric kinetics of dried and redispersed microfibrillated cellulose.$h[electronic resource]
260 $c2025
520 $aHydroxypropyl Methylcellulose (HPMC) and Hydroxyethyl Cellulose (HEC) were added in variable amounts (5–30% w/w) to microfibrillated cellulose (MFC) and after homogenization the blends were dried by spray drying and redispersed by sonication. The dispersions were characterized through oscillatory rheometric measurements, where amplitude, frequency and viscosity sweeps were performed. For redispersed blend samples, when compared to redispersed MFC and never-dried blends, the addition of HPMC and HEC resulted in an increase in storage and loss moduli, an increase in apparent viscosity and thixotropy, as well as greater stability. The use of sonication also showed significant effects for never-dried MFC suspensions and their blends, with increased moduli and viscosity. Furthermore, the dry blends in a ratio of 70:30 were studied for thermal stability and thermogravimetric kinetics, where interactions between the polymers were confirmed. The results showed a decrease in thermal stability and activation energy of the blends, which is probably a result of the decrease in cellulose intrachain and interchain hydrogen bonds.
650 $aCellulose
650 $aCelulose
650 $aPropriedade Reológica
653 $aCinética termogravimétrica
653 $aHydroxyethyl cellulose
653 $aHydroxypropyl methylcellulose
653 $aSonicação
653 $aSonication
700 1 $aPIRES, C.
700 1 $aFREITAS, R. A. de
700 1 $aMAGALHAES, W. L. E.
773 $tFibers and Polymers, 2025, 1229-9197, 2025.
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Embrapa Florestas (CNPF) |
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| 1. |  | TOURNE, D. C. M.; MARTORANO, L. G.; BRIENZA JUNIOR, S.; DIAS, C. T. dos S.; LISBOA, L. S.; SARTORIO, S. D.; VETTORAZZI, C. A. Potential topoclimatic zones as support for forest plantation in the Amazon: Advances and challenges to growing paricá (Schizolobium amazonicum). Environmental Development, v. 18, p. 26-35, Apr. 2016.| Tipo: Artigo em Periódico Indexado | Circulação/Nível: B - 1 |
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