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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: |
09/11/2018 |
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Data da última atualização: |
26/07/2019 |
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Tipo da produção científica: |
Artigo em Periódico Indexado |
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Autoria: |
MALUCELLI, L. C.; MATOS, M. de; JORDÃO, C.; LACERDA, L. G.; CARVALHO FILHO, M. A. S.; MAGALHAES, W. L. E. |
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Afiliação: |
LUCCA C. Malucelli, Graduate Program in Environmental Management, Universidade Positivo; Mailson de Matos, Graduate Program in Materials and Science Engineering (PIPE), UFPR; Caroline Jordão, Graduate Program in Materials and Science Engineering (PIPE), UFPR; L. G. Lacerda, Graduate Program in Food Engineering, UEPG; M. A. S. Carvalho Filho, Graduate Program in Environmental Management, Universidade Positivo; WASHINGTON LUIZ ESTEVES MAGALHAES, CNPF. |
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Título: |
Grinding severity influences the viscosity of cellulose nanofiber (CNF) suspensions and mechanical properties of nanopaper. |
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Ano de publicação: |
2018 |
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Fonte/Imprenta: |
Cellulose, v. 25, n. 11, p. 6581-6589, Nov. 2018. |
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DOI: |
10.1007/s10570-018-2031-9 |
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Idioma: |
Inglês |
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Conteúdo: |
The extent of influence of ultrafine grinding on thermal, structural and rheological properties of cellulose nanofibers and mechanical properties of nanopaper was studied. Bleached Eucalyptus Pulp was used as a raw material for nanocellulose preparation where samples were collected every 5 passages (5, 10, 15, 20 and 25 passages) for analysis. TGA curves suggest thermal stability is decreased after 15 passages as surface area increased in homogenized samples. Moreover, intense defibrillation anticipated thermal degradation and gradually reduced cellulose degradation enthalpy in samples, as evidenced by TGA and DSC curves, thus suggesting fibers size reduction. The XRD crystallinity index does not vary with increased grinding. Finally, suspensions viscosity and nanopaper density showed strong influence over the mechanical properties of nanopapers as evidenced by DMA characterization. Increase in defibrillation resulted in fibers with enhanced tensile strain, toughness, and elastic modulus. However, fiber over-grinding affected this improvement, probably reducing electrostatic repulsion between fibers and resulting in less dense nanopapers. |
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Palavras-Chave: |
Defibrillation; Dynamic mechanical analysis; Microfibrilação; Microfibrillation; Nanocellulose; Nanocelulose. |
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Thesagro: |
Viscosidade. |
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Thesaurus Nal: |
Viscosity. |
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Categoria do assunto: |
X Pesquisa, Tecnologia e Engenharia |
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Marc: |
LEADER 02046naa a2200289 a 4500
001 2099071
005 2019-07-26
008 2018 bl uuuu u00u1 u #d
024 7 $a10.1007/s10570-018-2031-9$2DOI
100 1 $aMALUCELLI, L. C.
245 $aGrinding severity influences the viscosity of cellulose nanofiber (CNF) suspensions and mechanical properties of nanopaper.$h[electronic resource]
260 $c2018
520 $aThe extent of influence of ultrafine grinding on thermal, structural and rheological properties of cellulose nanofibers and mechanical properties of nanopaper was studied. Bleached Eucalyptus Pulp was used as a raw material for nanocellulose preparation where samples were collected every 5 passages (5, 10, 15, 20 and 25 passages) for analysis. TGA curves suggest thermal stability is decreased after 15 passages as surface area increased in homogenized samples. Moreover, intense defibrillation anticipated thermal degradation and gradually reduced cellulose degradation enthalpy in samples, as evidenced by TGA and DSC curves, thus suggesting fibers size reduction. The XRD crystallinity index does not vary with increased grinding. Finally, suspensions viscosity and nanopaper density showed strong influence over the mechanical properties of nanopapers as evidenced by DMA characterization. Increase in defibrillation resulted in fibers with enhanced tensile strain, toughness, and elastic modulus. However, fiber over-grinding affected this improvement, probably reducing electrostatic repulsion between fibers and resulting in less dense nanopapers.
650 $aViscosity
650 $aViscosidade
653 $aDefibrillation
653 $aDynamic mechanical analysis
653 $aMicrofibrilação
653 $aMicrofibrillation
653 $aNanocellulose
653 $aNanocelulose
700 1 $aMATOS, M. de
700 1 $aJORDÃO, C.
700 1 $aLACERDA, L. G.
700 1 $aCARVALHO FILHO, M. A. S.
700 1 $aMAGALHAES, W. L. E.
773 $tCellulose$gv. 25, n. 11, p. 6581-6589, Nov. 2018.
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Embrapa Florestas (CNPF) |
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| Registros recuperados : 8 | |
| 5. |  | LO MONACO, P. A.; MATOS, A. T. de; JORDÃO, C. P.; CECON, P. R.; MARTINEZ, M. A. Influência da granulometria da serragem de madeira como material filtrante no tratamento de águas residuais. Revista Brasileira de Engenharia Agrícola e Ambiental, Campina Grande, v. 8, n. 1, p. 116-119, jan. 2004.| Biblioteca(s): Embrapa Florestas. |
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| 6. | | MALUCELLI, L. C.; MATOS, M. de; JORDÃO, C.; LACERDA, L. G.; CARVALHO FILHO, M. A. S.; MAGALHAES, W. L. E. Grinding severity influences the viscosity of cellulose nanofiber (CNF) suspensions and mechanical properties of nanopaper. Cellulose, v. 25, n. 11, p. 6581-6589, Nov. 2018.| Tipo: Artigo em Periódico Indexado | Circulação/Nível: A - 1 |
| Biblioteca(s): Embrapa Florestas. |
|  |
| 8. | | MALUCELLI, L. C.; MATOS, M. de; JORDÃO, C.; LOMONACO, D.; LACERDA, L. G.; CARVALHO FILHO, M. A. da S.; MAGALHAES, W. L. E. Influence of cellulose chemical pretreatment on energy consumption and viscosity of produced cellulose nanofibers (CNF) and mechanical properties of nanopaper. Cellulose, v. 26, n. 3, p. 1667-1681, Feb. 2019.| Tipo: Artigo em Periódico Indexado | Circulação/Nível: A - 1 |
| Biblioteca(s): Embrapa Florestas. |
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| Registros recuperados : 8 | |
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| Nenhum registro encontrado para a expressão de busca informada. |
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