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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. |
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Registro Completo |
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Biblioteca(s): |
Embrapa Instrumentação. |
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Data corrente: |
13/12/2024 |
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Data da última atualização: |
13/12/2024 |
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Tipo da produção científica: |
Artigo em Periódico Indexado |
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Autoria: |
LOZANO, K. P. C.; MENDES, J. F.; FERREIRA, L. F.; MARTINS, M. A.; MENDOZA, J. S.; MENDES, R. F. |
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Afiliação: |
FEDERAL UNIVERSITY OF LAVRAS; FEDERAL UNIVERSITY OF LAVRAS; MARIA ALICE MARTINS, CNPDIA; UNIVERSITY OF SUCRE; FEDERAL UNIVERSITY OF LAVRAS. |
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Título: |
Hydrophobic bio-composites of stearic acid starch esters and micro fibrillated cellulose processed by extrusion. |
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Ano de publicação: |
2024 |
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Fonte/Imprenta: |
Industrial Crops & Products, v. 221, 119313, 2024. |
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Páginas: |
1 - 13 |
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ISSN: |
0926-6690 |
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DOI: |
https://doi.org/10.1016/j.indcrop.2024.119313 |
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Idioma: |
Inglês |
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Conteúdo: |
Fatty acid starch esters are potential candidates for obtaining hydrophobic starch-based materials. The objective was to evaluate thermoplastic bio-composites with stearic acid cassava starch esters (SAE) as matrices reinforced with micro fibrillated cellulose (MFC). SAE with 0.11 and 0.14 of DS and native cassava starch were processed with 5 % and 10 % MFC by extrusion and then thermo-compression to obtain bio-composite films. Performance of bio-composites as a function of the degree of substitution (DS) of starch esters and the content of MFC, was evaluated. Starch esterification reduced the crystalline phase and glass transition temperature of bio-composites, as confirmed by structural and thermal analysis. The increase of DS reduced the degradation temperature, which was compensated by adding MFC, favoring thermal stability. The hydrophobicity of films increased with the degree of starch esterification. Treatments with 0.14 DS formed stiffer and less tensile strength films. There was an increase in the modulus of elasticity and a reduction in elongation by increasing MFC. Fracture microscopy of films showed defects by incomplete starch melting and lack of interfacial adhesion with MFC caused by starch esterification. Starch esterification and MFC dispersion were determinants in the performance of bio-composites. In consequence, starch esterification with stearic acid reduces the compatibility with the MFC and, consequently, the performance of composites |
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Palavras-Chave: |
Ball-milling; Composites. |
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Categoria do assunto: |
-- |
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Marc: |
LEADER 02219naa a2200241 a 4500
001 2170670
005 2024-12-13
008 2024 bl uuuu u00u1 u #d
022 $a0926-6690
024 7 $ahttps://doi.org/10.1016/j.indcrop.2024.119313$2DOI
100 1 $aLOZANO, K. P. C.
245 $aHydrophobic bio-composites of stearic acid starch esters and micro fibrillated cellulose processed by extrusion.$h[electronic resource]
260 $c2024
300 $a1 - 13
520 $aFatty acid starch esters are potential candidates for obtaining hydrophobic starch-based materials. The objective was to evaluate thermoplastic bio-composites with stearic acid cassava starch esters (SAE) as matrices reinforced with micro fibrillated cellulose (MFC). SAE with 0.11 and 0.14 of DS and native cassava starch were processed with 5 % and 10 % MFC by extrusion and then thermo-compression to obtain bio-composite films. Performance of bio-composites as a function of the degree of substitution (DS) of starch esters and the content of MFC, was evaluated. Starch esterification reduced the crystalline phase and glass transition temperature of bio-composites, as confirmed by structural and thermal analysis. The increase of DS reduced the degradation temperature, which was compensated by adding MFC, favoring thermal stability. The hydrophobicity of films increased with the degree of starch esterification. Treatments with 0.14 DS formed stiffer and less tensile strength films. There was an increase in the modulus of elasticity and a reduction in elongation by increasing MFC. Fracture microscopy of films showed defects by incomplete starch melting and lack of interfacial adhesion with MFC caused by starch esterification. Starch esterification and MFC dispersion were determinants in the performance of bio-composites. In consequence, starch esterification with stearic acid reduces the compatibility with the MFC and, consequently, the performance of composites
653 $aBall-milling
653 $aComposites
700 1 $aMENDES, J. F.
700 1 $aFERREIRA, L. F.
700 1 $aMARTINS, M. A.
700 1 $aMENDOZA, J. S.
700 1 $aMENDES, R. F.
773 $tIndustrial Crops & Products$gv. 221, 119313, 2024.
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Embrapa Instrumentação (CNPDIA) |
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| 6. |  | VELOSO, M. G.; DIECKOW, J.; ZANATTA, J. A.; BAYER, C.; HIGA, R. C. V.; BREVILIERI, R. C.; COMERFORD, N. B.; STOPPE, A. M. Reforestation with loblolly pine can restore the initial soil carbon stock relative to a subtropical natural forest after 30 years. European Journal of Forest Research, v. 137, p. 593-604, Oct. 2018.| Tipo: Artigo em Periódico Indexado | Circulação/Nível: B - 2 |
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