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| Registros recuperados : 31 | |
| 21. |  | BUFALINO, L.; PROTÁSIO, T. de P.; COUTO, A. M.; NASSUR, O. A. C.; SÁ, V. A. de; TRUGILHO, P. F.; MENDES, L. M. Caracterização química e energética para aproveitamento da madeira de costaneira e desbaste de cedro australiano. Pesquisa Florestal Brasileira, Colombo, v. 32, n. 70, p. 129-137, abr./jun. 2012.| Biblioteca(s): Embrapa Florestas. |
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| 22. | | BUFALINO, L.; TONOLI, G. H. D.; COSTA, T. G.; PROTASIO, T. de P.; SENA NETO, A. R.; MARCONCINI, J. M.; GUIMARAES JUNIOR, M.; MENDES, L. M. Nanocellulose films from Amazon forest wood wastes: structural and thermal properties. Key engineering materials, [S. l.], v. 668, p. 110-117, 2016.| Biblioteca(s): Embrapa Instrumentação. |
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| 23. | | PROTÁSIO, T. de P.; LIMA, M. D. R.; BARROS JUNIOR, U. de O.; BUFALINO, L.; SILVA, A. R.; GONÇALVES, D. de A.; TRUGILHO, P. F. Qualidade da madeira de Tachigali vulgaris visando à produção de carvão vegetal siderúrgico. In: WORKSHOP ONLINE FLORESTAS DE TACHIGALI VULGARIS, 1., 2021, Colombo. Anais. Colombo: Embrapa Florestas, 2022. p. 113-124. (Embrapa Florestas. Documentos, 377).| Biblioteca(s): Embrapa Amazônia Oriental. |
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| 24. | | SILVA, M. O. dos S.; SILVA, M. G. da; BUFALINO, L.; ASSIS, M. R. de; GONCALVES, D. de A.; TRUGILHO, P. F.; PROTÁSIO, T. de P. Variations in productivity and wood properties of Amazonian tachi-branco trees planted at different spacings for bioenergy purposes. Journal of Forestry Research, v. 32, n. 1, p. 211-224, 2021. Publicado Online em 18 nov. 2019.| Biblioteca(s): Embrapa Amazônia Oriental. |
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| 25. | | BARROS-JUNIOR, U. O.; ROSÁRIO, W. A. S.; LIMA, M. D. R.; SILVA, M. O. S.; PATRÍCIO, E. P. S.; GONÇALVES, D. de A.; BUFALINO, L.; PROTÁSIO, T. P. Effects of tree spacing and forking on the modification of wood density in a trial plantation of Tachigali vulgaris for energy in Amazonia. Journal of Tropical Forest Science, v. 34, n. 1, p. 11-23, 2022.| Biblioteca(s): Embrapa Amazônia Oriental. |
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| 26. | | 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. Exploiting the Amazonian açaí palm leaves potential as reinforcement for cement composites through alkali and bleaching treatments. Journal of Natural Fibers, v. 1, p. 1-14, 2021.| Biblioteca(s): Embrapa Agroindústria Tropical; Embrapa Amapá. |
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| 27. | | MORAES, L. G.; LIMA, M. D. R.; ASSIS-PEREIRA, G.; GONÇALVES, D. de A.; VIDAURRE, G. B.; BUFALINO, L.; GUEDES, F. T. P.; TOMAZELLO-FILHO, M.; PROTÁSIO, T. de P. Forking and planting spacing impacts on wood density, X‑ray density, and heartwood proportion of Tachigali vulgaris. Trees, v. 37, p. 1567-1581, 2023.| Biblioteca(s): Embrapa Amazônia Oriental. |
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| 28. | | BUFALINO, L.; SENA NETO, A. R. de; TONOLI, G. H. D.; FONSECA, A. de S.; COSTA, T. G.; MARCONCINI, J. M.; COLODETTE, J. L.; LABORY, C. R. G.; MENDES, L. M. How the chemical nature of Brazilian hardwoods affects nanofibrillation of cellulose fibers and film optical quality. Cellulose, [S. l.], v. 22, p. 3657-3672, 2015.| Biblioteca(s): Embrapa Instrumentação. |
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| 29. | | SILVA, D. W.; SCATOLINO, M. V.; PEREIRA, T. G. T.; VILELA, A. P.; EUGENIO, T. M. C.; MARTINS, M. A.; MENDES, R. F.; BUFALINO, L.; TONOLI, G. H. D.; MENDES, L. M. Influence of thermal treatment of eucalyptus fibers on the physical-mechanical properties of extruded fiber-cement composites. Materials Today: Proceedings, v. 31, 2020. S348-S352| Biblioteca(s): Embrapa Instrumentação. |
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| 30. | | LIMA, M. D. R.; MORAES, L. G.; SILVA, R. de C. C.; BARROS JUNIOR, U. de O.; BUFALINO, L.; SOARES, A. A. V.; ASSIS-PEREIRA, G.; GONÇALVES, D. de A.; TOMAZELLO-FILHO, M.; PROTÁSIO, T. de P. Tachigali vulgaris energy forests: understanding spacing, age, and stem type effects on tree growth patterns and wood density. New Forests, v. 54, n. 3, p. 491-513, 2023.| Biblioteca(s): Embrapa Amazônia Oriental. |
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| 31. | | SCATOLINO, M. V.; DIAS, M. C.; SILVA, D. W.; BUFALINO, L.; MARTINS, M. A.; PICCOLI, R. H.; TONOLI, G. H. D.; LONDERO, A. A.; OENNING NETO, V.; MENDES, L. M. Tannin-stabilized silver nanoparticles and citric acid added associated to cellulose nanofibrils: effect on film antimicrobial properties. SN Applied Science, n. 1, art. 1243, 2019 Published online: 20 September 2019.| Biblioteca(s): Embrapa Instrumentação. |
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| Registros recuperados : 31 | |
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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. |
Registro Completo
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Biblioteca(s): |
Embrapa Instrumentação. |
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Data corrente: |
11/08/2020 |
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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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Circulação/Nível: |
B - 4 |
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Autoria: |
SILVA, D. W.; SCATOLINO, M. V.; PEREIRA, T. G. T.; VILELA, A. P.; EUGENIO, T. M. C.; MARTINS, M. A.; MENDES, R. F.; BUFALINO, L.; TONOLI, G. H. D.; MENDES, L. M. |
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Afiliação: |
MARIA ALICE MARTINS, CNPDIA. |
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Título: |
Influence of thermal treatment of eucalyptus fibers on the physical-mechanical properties of extruded fiber-cement composites. |
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Ano de publicação: |
2020 |
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Fonte/Imprenta: |
Materials Today: Proceedings, v. 31, 2020. |
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Páginas: |
S348-S352 |
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ISSN: |
2214-7853 |
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DOI: |
https://doi.org/10.1016/j.matpr.2020.04.764 |
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Idioma: |
Inglês |
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Conteúdo: |
This study proposes to evaluate the effect of the heat treatment in commercial eucalyptus fibers (produced by thermo-mechanical process) on the physical-mechanical properties of extruded fiber-cements composites. The fibers were treated with different temperatures of heat treatment (140, 170, 200 and 230 °C) for 60 min in a “Macro-ATG” oven. The chemical and morphological characteristics of the natural fibers were evaluated before and after the thermal treatment. The cementitious paste was composed by 67.9% cement, 29.1% limestone and 3% eucalyptus fibers. Hydroxypropylmethylcellulose (HPMC) and polyether carboxylic acid (ADVA 175) were added to the cement paste both in 1% (based on the cement mass) to facilitate the extrusion process. The thermal treatments at 200 and 230 °C were efficient in reducing the extractives content. On the other hand, a decrease in length, diameter and lumen size of the fibers has occurred. The decrease in extractives content did not influence the properties of water absorption, modulus of rupture (MOR) and modulus of elasticity (MOE). The increase in lignin content resulted in increase for apparent porosity and decrease of the toughness in reinforced fiber-cement produced with fibers treated at 200 and 230 °C. The application of the thermal treatment for the fibers did not show improvement in fiber-cement in the evaluated conditions. It is recommended to evaluate other properties of the fiber-cement reinforced with the mentioned treated fibers, such as natural and laboratorial weathering. MenosThis study proposes to evaluate the effect of the heat treatment in commercial eucalyptus fibers (produced by thermo-mechanical process) on the physical-mechanical properties of extruded fiber-cements composites. The fibers were treated with different temperatures of heat treatment (140, 170, 200 and 230 °C) for 60 min in a “Macro-ATG” oven. The chemical and morphological characteristics of the natural fibers were evaluated before and after the thermal treatment. The cementitious paste was composed by 67.9% cement, 29.1% limestone and 3% eucalyptus fibers. Hydroxypropylmethylcellulose (HPMC) and polyether carboxylic acid (ADVA 175) were added to the cement paste both in 1% (based on the cement mass) to facilitate the extrusion process. The thermal treatments at 200 and 230 °C were efficient in reducing the extractives content. On the other hand, a decrease in length, diameter and lumen size of the fibers has occurred. The decrease in extractives content did not influence the properties of water absorption, modulus of rupture (MOR) and modulus of elasticity (MOE). The increase in lignin content resulted in increase for apparent porosity and decrease of the toughness in reinforced fiber-cement produced with fibers treated at 200 and 230 °C. The application of the thermal treatment for the fibers did not show improvement in fiber-cement in the evaluated conditions. It is recommended to evaluate other properties of the fiber-cement reinforced with the mentioned treated fibers, s... Mostrar Tudo |
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Palavras-Chave: |
Cementitious composites; Chemical characterization; Extruded process; Morphological characterization. |
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Categoria do assunto: |
-- |
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Marc: |
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100 1 $aSILVA, D. W.
245 $aInfluence of thermal treatment of eucalyptus fibers on the physical-mechanical properties of extruded fiber-cement composites.$h[electronic resource]
260 $c2020
300 $aS348-S352
520 $aThis study proposes to evaluate the effect of the heat treatment in commercial eucalyptus fibers (produced by thermo-mechanical process) on the physical-mechanical properties of extruded fiber-cements composites. The fibers were treated with different temperatures of heat treatment (140, 170, 200 and 230 °C) for 60 min in a “Macro-ATG” oven. The chemical and morphological characteristics of the natural fibers were evaluated before and after the thermal treatment. The cementitious paste was composed by 67.9% cement, 29.1% limestone and 3% eucalyptus fibers. Hydroxypropylmethylcellulose (HPMC) and polyether carboxylic acid (ADVA 175) were added to the cement paste both in 1% (based on the cement mass) to facilitate the extrusion process. The thermal treatments at 200 and 230 °C were efficient in reducing the extractives content. On the other hand, a decrease in length, diameter and lumen size of the fibers has occurred. The decrease in extractives content did not influence the properties of water absorption, modulus of rupture (MOR) and modulus of elasticity (MOE). The increase in lignin content resulted in increase for apparent porosity and decrease of the toughness in reinforced fiber-cement produced with fibers treated at 200 and 230 °C. The application of the thermal treatment for the fibers did not show improvement in fiber-cement in the evaluated conditions. It is recommended to evaluate other properties of the fiber-cement reinforced with the mentioned treated fibers, such as natural and laboratorial weathering.
653 $aCementitious composites
653 $aChemical characterization
653 $aExtruded process
653 $aMorphological characterization
700 1 $aSCATOLINO, M. V.
700 1 $aPEREIRA, T. G. T.
700 1 $aVILELA, A. P.
700 1 $aEUGENIO, T. M. C.
700 1 $aMARTINS, M. A.
700 1 $aMENDES, R. F.
700 1 $aBUFALINO, L.
700 1 $aTONOLI, G. H. D.
700 1 $aMENDES, L. M.
773 $tMaterials Today: Proceedings$gv. 31, 2020.
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