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Registro Completo |
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Biblioteca(s): |
Embrapa Instrumentação. |
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Data corrente: |
14/04/2020 |
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Data da última atualização: |
16/08/2022 |
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Tipo da produção científica: |
Artigo em Periódico Indexado |
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Autoria: |
CORRÊA, A. C.; TEODORO, K. B. R.; SIMÃO, J. A.; CLARO, P. I. C.; TEIXEIRA, E. M.; MATTOSO, L. H. C.; MARCONCINI, J. M. |
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Afiliação: |
LUIZ HENRIQUE CAPPARELLI MATTOSO, CNPDIA; JOSE MANOEL MARCONCINI, CNPDIA. |
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Título: |
Cellulose nanocrystals from curaua fibers and poly [ethylene-co-(vinyl acetate)] nanocomposites: Effect of drying process of CNCs on thermal and mechanical properties. |
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Ano de publicação: |
2020 |
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Fonte/Imprenta: |
Polymer Composites, v. 41, n. 5, 2020. |
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Páginas: |
1736-1748 |
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DOI: |
10.1002/pc.25493 |
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Idioma: |
Inglês |
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Conteúdo: |
Poly[ethylene-co-(vinyl acetate)] (EVA) and cellulose nanocrystals (CNCs)from curaua fibers were used to obtain nanocomposites. Due to polarity thatacetate groups promote in EVA, they tend to present better affinity with cellu-lose nanostructures without compatibilizers. In addition, the influence of thedrying conditions of CNCs suspension on their dispersion through the matrixwas also evaluated. CNCs were obtained via acid hydrolysis in a mixture of sul-furic and hydrochloric acids. Part of CNCs in neutral suspension was freeze-dried and part was dried in an oven with air circulation. The dried CNCs wereincorporated into EVA at concentrations of 1, 3, and 5 wt% of each CNCs. Thecompositions were processed in a corotating twin-screw extruder and injectionmolded. Morphological results showed better dispersion and adhesion offreeze-dried nanocrystals into EVA, and these nanocomposites also presentedincrease in elastic modulus and elongation at break, resulting in more resilientand elastic materials. |
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Palavras-Chave: |
Cellulose nanocrystals; Drying effect; EVA. |
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Categoria do assunto: |
-- |
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Marc: |
LEADER 01814naa a2200253 a 4500
001 2121646
005 2022-08-16
008 2020 bl uuuu u00u1 u #d
024 7 $a10.1002/pc.25493$2DOI
100 1 $aCORRÊA, A. C.
245 $aCellulose nanocrystals from curaua fibers and poly [ethylene-co-(vinyl acetate)] nanocomposites$bEffect of drying process of CNCs on thermal and mechanical properties.$h[electronic resource]
260 $c2020
300 $a1736-1748
520 $aPoly[ethylene-co-(vinyl acetate)] (EVA) and cellulose nanocrystals (CNCs)from curaua fibers were used to obtain nanocomposites. Due to polarity thatacetate groups promote in EVA, they tend to present better affinity with cellu-lose nanostructures without compatibilizers. In addition, the influence of thedrying conditions of CNCs suspension on their dispersion through the matrixwas also evaluated. CNCs were obtained via acid hydrolysis in a mixture of sul-furic and hydrochloric acids. Part of CNCs in neutral suspension was freeze-dried and part was dried in an oven with air circulation. The dried CNCs wereincorporated into EVA at concentrations of 1, 3, and 5 wt% of each CNCs. Thecompositions were processed in a corotating twin-screw extruder and injectionmolded. Morphological results showed better dispersion and adhesion offreeze-dried nanocrystals into EVA, and these nanocomposites also presentedincrease in elastic modulus and elongation at break, resulting in more resilientand elastic materials.
653 $aCellulose nanocrystals
653 $aDrying effect
653 $aEVA
700 1 $aTEODORO, K. B. R.
700 1 $aSIMÃO, J. A.
700 1 $aCLARO, P. I. C.
700 1 $aTEIXEIRA, E. M.
700 1 $aMATTOSO, L. H. C.
700 1 $aMARCONCINI, J. M.
773 $tPolymer Composites$gv. 41, n. 5, 2020.
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Registro original: |
Embrapa Instrumentação (CNPDIA) |
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