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 | Acesso ao texto completo restrito à biblioteca da Embrapa Amapá. Para informações adicionais entre em contato com cpafap.biblioteca@embrapa.br. |
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Registro Completo |
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Biblioteca(s): |
Embrapa Amapá. |
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Data corrente: |
28/11/2021 |
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Data da última atualização: |
03/02/2025 |
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Tipo da produção científica: |
Artigo em Periódico Indexado |
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Autoria: |
GUEDES, C. E. G.; OLIVEIRA, D. N. P. S. de; BEZERRA, J. B.; PENIDO, C. A. F. de O.; FERREIRA, N. S.; BORGES, W. L.; BUFALINO, L.; SOUZA, T. M. |
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Afiliação: |
CARLOS EDUARDO GOUVEIA GUEDES, UNIVERSIDADE FEDERAL DO AMAPÁ; DHIMITRIUS NEVES PARAGUASSÚ SMITH DE OLIVEIRA, POLÍCIA TÉCNICO-CIENTÍFICA DO ESTADO DO AMAPÁ; JEFFERSON BEZERRA BEZERRA, UNIVERSIDADE FEDERAL DO AMAPÁ; CIRO AUGUSTO FERNANDES DE OLIVEIRA PENIDO, POLÍCIA TÉCNICO-CIENTÍFICA DO ESTADO DO AMAPÁ; NILSON SANTOS FERREIRA, UNIVERSIDADE FEDERAL DE SERGIPE; WARDSSON LUSTRINO BORGES, CPAF-AP; LINA BUFALINO, UNIVERSIDADE FEDERAL RURAL DA AMAZÔNIA; TIAGO MARCOLINO SOUZA, UNIVERSIDADE DO ESTADO DO AMAPÁ. |
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Título: |
Exploiting the Amazonian açaí palm leaves potential as reinforcement for cement composites through alkali and bleaching treatments. |
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Ano de publicação: |
2022 |
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Fonte/Imprenta: |
Journal of Natural Fibers, v. 19, n. 13, p. 6947-6960, 2022. |
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DOI: |
https://doi.org/10.1080/15440478.2021.1941483 |
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Idioma: |
Inglês |
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Conteúdo: |
Recent investigations proposed alternatives for utilization of Açaí (Euterpe oleracea Mart.) fruit wastes, seeds, and lignocellulosic fibers. However, Açaí leaves may also be obtained without harvesting the palms and could be used in higher value-added products. Alkali reaction (1% and 5% of NaOH), different temperatures (70°C, 80°C, and 100°C), and bleaching were combined to produce fibres from the Açaí leaves. Scanning electron microscopy, X-ray diffraction, and thermogravimetry were used to evaluate the effect of treatments on fibers, whereas X-ray diffraction and calorimetry were employed to characterize Portland cement pastes containing fibers. Results indicated that Açaí leaves could be transformed into short-length fibers with improved degrading temperature. Alkali treatment at 5% sodium hydroxide (90°C) and bleaching increased fibers? crystallinity and showed efficiency in removing non-cellulosic components. Cement paste evaluation also indicated that fibers treated at 5% NaOH solution caused fewer changes in calorimetric profile and therefore present a greater potential for cement-based composites. |
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Palavras-Chave: |
Ceramic matrix; Fiber morphology; Portland cement. |
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Thesagro: |
Açaí. |
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Thesaurus Nal: |
Biocomposites; Biomass; Thermal stability. |
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Categoria do assunto: |
P Recursos Naturais, Ciências Ambientais e da Terra |
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Marc: |
LEADER 02084naa a2200301 a 4500
001 2136697
005 2025-02-03
008 2022 bl uuuu u00u1 u #d
024 7 $ahttps://doi.org/10.1080/15440478.2021.1941483$2DOI
100 1 $aGUEDES, C. E. G.
245 $aExploiting the Amazonian açaí palm leaves potential as reinforcement for cement composites through alkali and bleaching treatments.$h[electronic resource]
260 $c2022
520 $aRecent investigations proposed alternatives for utilization of Açaí (Euterpe oleracea Mart.) fruit wastes, seeds, and lignocellulosic fibers. However, Açaí leaves may also be obtained without harvesting the palms and could be used in higher value-added products. Alkali reaction (1% and 5% of NaOH), different temperatures (70°C, 80°C, and 100°C), and bleaching were combined to produce fibres from the Açaí leaves. Scanning electron microscopy, X-ray diffraction, and thermogravimetry were used to evaluate the effect of treatments on fibers, whereas X-ray diffraction and calorimetry were employed to characterize Portland cement pastes containing fibers. Results indicated that Açaí leaves could be transformed into short-length fibers with improved degrading temperature. Alkali treatment at 5% sodium hydroxide (90°C) and bleaching increased fibers? crystallinity and showed efficiency in removing non-cellulosic components. Cement paste evaluation also indicated that fibers treated at 5% NaOH solution caused fewer changes in calorimetric profile and therefore present a greater potential for cement-based composites.
650 $aBiocomposites
650 $aBiomass
650 $aThermal stability
650 $aAçaí
653 $aCeramic matrix
653 $aFiber morphology
653 $aPortland cement
700 1 $aOLIVEIRA, D. N. P. S. de
700 1 $aBEZERRA, J. B.
700 1 $aPENIDO, C. A. F. de O.
700 1 $aFERREIRA, N. S.
700 1 $aBORGES, W. L.
700 1 $aBUFALINO, L.
700 1 $aSOUZA, T. M.
773 $tJournal of Natural Fibers$gv. 19, n. 13, p. 6947-6960, 2022.
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Registro original: |
Embrapa Amapá (CPAF-AP) |
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| Registros recuperados : 3 | |
| 2. |  | GERMANO, C. M.; OLIVEIRA, N. N. P. M.; CARVALHO, I. M. de; LAMEIRA, O. A.; PINTO, J. E. B. P.; BERTOLUCCI, S. K. V. Doseamento de fenólicos totais e avaliação inibitória da lipoxigenase de frações do extrato etanólico bruto de Phyla betulifolia (Kunth) Greene (Verbenaceae). In: CONGRESSO DA PÓS-GRADUAÇÃO, 27., 2018, Lavras. Anais... Lavras: UFLA, 2018.| Tipo: Resumo em Anais de Congresso |
| Biblioteca(s): Embrapa Amazônia Oriental. |
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| 3. | | MORAIS, E. de; CARVALHO, I. C. de; PANTOJA, W. L. da C.; LIMA, A. C. S.; OLIVEIRA, M. E. C.; GUIMARÃES, C. M. C.; LOURENÇO JUNIOR, J. de B.; SILVA, A. G. M. e. Óleo de palma (Elaeis Guineenses Jacq.) na alimentação de ovinos, desaparecimento ruminal da matéria seca, matéria orgânica e proteína bruta. In: CONGRESSO BRASILEIRO DE ZOOTECNIA, 24., 2014, Vitória. A zootecnia fazendo o Brasil crescer: anais... Vitória: Universidade Federal do Espírito Santo, 2014.| Tipo: Artigo em Anais de Congresso |
| Biblioteca(s): Embrapa Amazônia Oriental. |
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| Registros recuperados : 3 | |
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