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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: |
09/08/2024 |
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Data da última atualização: |
27/11/2024 |
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Tipo da produção científica: |
Artigo em Periódico Indexado |
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Autoria: |
PETERSOHN JUNIOR, E.; LUCIZANI, A. C.; VERÍSSIMO, V.; PIRES, C.; ANDRADE, A. S. de; MATOS, M. de; PERISSUTTI, G. E.; MAGALHAES, W. L. E.; FREITAS, R. A. de. |
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Afiliação: |
EGON PETERSOHN JUNIOR, UNIVERSIDADE FEDERAL DO PARANÁ; ANGELO CEZAR LUCIZANI, UNIVERSIDADE FEDERAL DO PARANÁ; VICTOR VERÍSSIMO, UNIVERSIDADE FEDERAL DO PARANÁ; CASSIANO PIRES, UNIVERSIDADE FEDERAL DO PARANÁ; ALAN SULATO DE ANDRADE, UNIVERSIDADE FEDERAL DO PARANÁ; MAILSON DE MATOS, SENAI; GISELE ELIANE PERISSUTTI, CNPF; WASHINGTON LUIZ ESTEVES MAGALHAES, CNPF; RILTON ALVES DE FREITAS, UNIVERSIDADE FEDERAL DO PARANÁ. |
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Título: |
Rheological properties of microfibrillated cellulose and hydroxypropyl methylcellulose blends in ethanol/water solvent systems. |
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Ano de publicação: |
2024 |
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Fonte/Imprenta: |
Cellulose, v. 31, n.13, p. 7925-7940, 2024. |
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ISSN: |
0969-0239 |
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DOI: |
https://doi.org/10.1007/s10570-024-06085-3 |
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Idioma: |
Inglês |
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Conteúdo: |
Microfibrillated cellulose (MFC) and hydroxypropyl methylcellulose (HPMC) were employed as gelling agents in hydroalcoholic solu- tions. However, a limited number of studies have explored the interactions between MFC and cellulose derivatives in organic solvents. Most of these stud- ies have primarily focused on either the interactions between MFC and polymers in aqueous solutions. To investigate their collaborative effect, phase diagrams were constructed by varying the concentration of the constituent elements, confirming phase separa- tion, and identifying liquid-like and gel-like proper- ties through oscillatory rheological measurements. Oscillatory amplitude, frequency, oscillatory swing temperature and viscosity were performed. Addition- ally, aerogels were fabricated with and without etha- nol for microscopic analysis. It was demonstrated that ethanol significantly influences the rheological char- acteristics of MFC and MFC + HPMC dispersions, resulting in an increase in the elastic modulus (G’), decreased thixotropic behavior, and increased stabil- ity. Tests were also conducted with urea, a strongly chaotropic agent, providing evidence of the types of interactions governing the systems, and demonstrat- ing that intermolecular hydrogen bond interactions play a predominant role. |
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Palavras-Chave: |
Celulose microfibrilada; Hidroalcoólico soluções; Hidroxipropilmetil celulose; Hydroalcoholic solutions; Hydroxypropyl methylcellulose; Microfibrillated cellulose; Reologia. |
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Thesagro: |
Celulose. |
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Thesaurus Nal: |
Rheology. |
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Categoria do assunto: |
K Ciência Florestal e Produtos de Origem Vegetal |
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Marc: |
LEADER 02409naa a2200349 a 4500
001 2166406
005 2024-11-27
008 2024 bl uuuu u00u1 u #d
022 $a0969-0239
024 7 $ahttps://doi.org/10.1007/s10570-024-06085-3$2DOI
100 1 $aPETERSOHN JUNIOR, E.
245 $aRheological properties of microfibrillated cellulose and hydroxypropyl methylcellulose blends in ethanol/water solvent systems.$h[electronic resource]
260 $c2024
520 $aMicrofibrillated cellulose (MFC) and hydroxypropyl methylcellulose (HPMC) were employed as gelling agents in hydroalcoholic solu- tions. However, a limited number of studies have explored the interactions between MFC and cellulose derivatives in organic solvents. Most of these stud- ies have primarily focused on either the interactions between MFC and polymers in aqueous solutions. To investigate their collaborative effect, phase diagrams were constructed by varying the concentration of the constituent elements, confirming phase separa- tion, and identifying liquid-like and gel-like proper- ties through oscillatory rheological measurements. Oscillatory amplitude, frequency, oscillatory swing temperature and viscosity were performed. Addition- ally, aerogels were fabricated with and without etha- nol for microscopic analysis. It was demonstrated that ethanol significantly influences the rheological char- acteristics of MFC and MFC + HPMC dispersions, resulting in an increase in the elastic modulus (G’), decreased thixotropic behavior, and increased stabil- ity. Tests were also conducted with urea, a strongly chaotropic agent, providing evidence of the types of interactions governing the systems, and demonstrat- ing that intermolecular hydrogen bond interactions play a predominant role.
650 $aRheology
650 $aCelulose
653 $aCelulose microfibrilada
653 $aHidroalcoólico soluções
653 $aHidroxipropilmetil celulose
653 $aHydroalcoholic solutions
653 $aHydroxypropyl methylcellulose
653 $aMicrofibrillated cellulose
653 $aReologia
700 1 $aLUCIZANI, A. C.
700 1 $aVERÍSSIMO, V.
700 1 $aPIRES, C.
700 1 $aANDRADE, A. S. de
700 1 $aMATOS, M. de
700 1 $aPERISSUTTI, G. E.
700 1 $aMAGALHAES, W. L. E.
700 1 $aFREITAS, R. A. de
773 $tCellulose$gv. 31, n.13, p. 7925-7940, 2024.
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