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| Registros recuperados : 19 | |
| 2. |  | MENDES, L. M.; IWAKIRI, S.; MORI, F. A.; GUIMARÃES JUNIOR, J. B.; MENDES, R. F. Eucalyptus urophylla stands wood utilization at two different ages for production of particleboard panels. Cerne, Lavras, v. 15, n. 3, p. 288-294, jul./set. 2009.| Biblioteca(s): Embrapa Florestas. |
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| 5. | | GUIMARÃES JÚNIOR, J. B.; MENDES, L. M.; MENDES, R. F.; MORI, F. A. Painéis de madeira aglomerada de resíduos da laminação de diferentes procedências de Eucalyptus grandis, Eucalyptus saligna e Eucalyptus cloeziana. Cerne, Lavras, v. 17, n. 4, p. 443-452, out./dez. 2011.| Biblioteca(s): Embrapa Florestas. |
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| 6. | | MENDES, R. F.; MENDES, L. M.; MENDONÇA, L. L.; GUIMARÃES JÚNIOR, J. B.; MORI, F. A. Qualidade de painéis aglomerados homogêneos produzidos com a madeira de clones de Eucalyptus urophylla. Cerne, Lavras, v. 20, n. 2, p. 329-336, abr./jun. 2014.| Biblioteca(s): Embrapa Florestas. |
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| 8. | | MENDES, R. F.; MENDES, L. M.; GUIMARÃES JÚNIOR, J. B.; SANTOS, R. C. dos; CÉSAR, A. A. da S. Efeito da associação de bagaço de cana, do tipo e do teor de adesivo na produção de painéis aglomerados. Ciência Florestal, Santa Maria, v. 22, n. 1, p. 161-170, jan./mar. 2012.| Biblioteca(s): Embrapa Florestas. |
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| 10. | | GUIMARÃES JUNIOR, J. B.; XAVIER, M. M.; SANTOS, T. S.; PROTÁSIO, T. de P.; MENDES, R. F.; MENDES, L. M. Inclusão de resíduo da cultura de sorgo em painéis aglomerados de eucalipto. Pesquisa Florestal Brasileira, Colombo, v. 36, n. 88, p. 435-442, out./dez. 2016.| Biblioteca(s): Embrapa Florestas. |
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| 11. | | GUIMARÃES JUNIOR, J. B.; ARAÚJO, B. L. M.; LOPES, O. P.; MENDES, R. F.; MENDES, L. M. Produção de painéis aglomerados da madeira de desrama de Acacia mangium. Pesquisa Florestal Brasileira, Colombo, v. 33, n. 76, p. 387-391, out./dez. 2013.| Biblioteca(s): Embrapa Florestas. |
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| 12. | | ALMEIDA, K. N. S. de; SOUZA, K. B. de; MENDES, R. F.; GUIMARÃES JÚNIOR, J. B.; MENDES, L. M. Qualidade de painéis aglomerados produzidos com Eucalyptus urophylla e resíduos da desrama de Acacia mangium Willd. Scientia Forestalis, Piracicaba, v. 43, n. 107, p. 713-720, set. 2015.| Biblioteca(s): Embrapa Florestas. |
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| 14. | | PROTÁSIO, T. de P.; COUTO, A. M.; TRUGILHO, P. F.; GUIMARÃES JUNIOR, J. B.; LIMA JUNIOR, P. H. de; SILVA, M. M. O. Avaliação tecnológica do carvão vegetal da madeira de clones jovens de Eucalyptus grandis e Eucalyptus urophylla. Scientia Forestalis, Piracicaba, v. 43, n. 108, p. 801-816, dez. 2015.| Biblioteca(s): Embrapa Florestas. |
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| 15. | | PROTÁSIO, T. de P.; GUIMARÃES NETO, R. M.; SANTANA, J. de D. P. de; GUIMARÃES JÚNIOR, J. B.; TRUGILHO, P. F. Canonical correlation analysis of the characteristics of charcoal from Qualea parviflora Mart. Cerne, Lavras, v. 20, n. 1, p. 81-88, jan./mar. 2014.| Biblioteca(s): Embrapa Florestas. |
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| 16. | | PROTÁSIO, T. de P.; SANTANA, J. de D. P. de; GUIMARÃES NETO, R. M.; GUIMARÃES JÚNIOR, J. B.; TRUGILHO, P. F.; RIBEIRO, I. B. Avaliação da qualidade do carvão vegetal de Qualea parviflora. Pesquisa Florestal Brasileira, Colombo, v. 31, n. 68, p. 295-307, out./dez. 2011.| Biblioteca(s): Embrapa Florestas. |
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| 17. | | CÉSAR, A. A. da S.; MENDES, L. M.; BUFALINO, L.; PROTÁSIO, T. de P.; GUIMARÃES JUNIOR, J. B.; MORI, F. A.; MESQUITA, R. G. de A. Análise da qualidade do encolamento de partículas de painéis OSB em condições de laboratório. Cerne, Lavras, v. 20, n. 4, p. 501-508, 2014.| Biblioteca(s): Embrapa Florestas. |
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| 18. | | PROTÁSIO, T. de P.; TRUGILHO, P. F.; SIQUEIRA, H. F. de; MELO, I. C. N. A. de; ANDRADE, C. R.; GUIMARÃES JUNIOR, J. B. Caracterização energética de pellets in natura e torrificados produzidos com madeira residual de Pinus. Pesquisa Florestal Brasileira, Colombo, v. 35, n. 84, p. 435-442, out./dez. 2015.| Biblioteca(s): Embrapa Florestas. |
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| 19. | | FARIA, D. L.; MESQUITA JUNIOR, L.; RESENDE, A. A.; LOPES, D. E.; MENDES, L. M.; MARTINS, M. A.; MARCONCINI, J. M.; GUIMARÃES JUNIOR, J. B. Physical and mechanical properties of polyurethane thermoset matrices reinforced with green coconut fibres. Journal of Composite Materials, v. 54, n. 30, 2020. 4841-4852| Biblioteca(s): Embrapa Instrumentação. |
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| Registros recuperados : 19 | |
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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: |
26/08/2020 |
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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: |
A - 2 |
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Autoria: |
FARIA, D. L.; MESQUITA JUNIOR, L.; RESENDE, A. A.; LOPES, D. E.; MENDES, L. M.; MARTINS, M. A.; MARCONCINI, J. M.; GUIMARÃES JUNIOR, J. B. |
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Afiliação: |
MARIA ALICE MARTINS, CNPDIA; JOSE MANOEL MARCONCINI, CNPDIA. |
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Título: |
Physical and mechanical properties of polyurethane thermoset matrices reinforced with green coconut fibres. |
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Ano de publicação: |
2020 |
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Fonte/Imprenta: |
Journal of Composite Materials, v. 54, n. 30, 2020. |
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Páginas: |
4841-4852 |
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DOI: |
10.1177/0021998320940023 |
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Idioma: |
Inglês |
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Conteúdo: |
Currently, the use of composites to replace parts made only with plastics has been gradually employed. The advantages of these composites are low cost, high availability of raw materials and good physical and mechanical properties. Thus, this work aimed at producing and characterizing composites produced with coconut fibre reinforced polyurethane matrices. The coconut fibres were studied as to their chemical constituents, aspect ratio, bulk density, pH, tensile properties, and surface SEM images. The composites were prepared using the hand lay-up process and four different concentrations of coconut fibre were evaluated: 30, 40, 50, and 60%. The composites were assessed as for water absorption after 20 days of immersion, bulk density, impact IZOD, tensile tests, and visualize the matrix-reinforcement interface using SEM. The electron micrographs showed a great deal of impurities on the surface of coconut fibres, such as greases, waxes, and gums, due to the high amount of extraction material (19.78%), which damages the adherence of the polymer onto the coconut fibre and, as observed, cause detachment between the reinforcement and the matrix. The tensile strength of the composites tended to increase as greater amounts of coconut fibres were added to the matrix. The averages were around 6.51 to 6.72 MPa for composites with 30 and 60% fibres, respectively. Therefore, coconut fibres can be considered as an alternative to synthetic fibres commonly used in composites, and they can be used at a ratio of 60% without prejudicing the properties of the composites, making them lighter and cheaper. MenosCurrently, the use of composites to replace parts made only with plastics has been gradually employed. The advantages of these composites are low cost, high availability of raw materials and good physical and mechanical properties. Thus, this work aimed at producing and characterizing composites produced with coconut fibre reinforced polyurethane matrices. The coconut fibres were studied as to their chemical constituents, aspect ratio, bulk density, pH, tensile properties, and surface SEM images. The composites were prepared using the hand lay-up process and four different concentrations of coconut fibre were evaluated: 30, 40, 50, and 60%. The composites were assessed as for water absorption after 20 days of immersion, bulk density, impact IZOD, tensile tests, and visualize the matrix-reinforcement interface using SEM. The electron micrographs showed a great deal of impurities on the surface of coconut fibres, such as greases, waxes, and gums, due to the high amount of extraction material (19.78%), which damages the adherence of the polymer onto the coconut fibre and, as observed, cause detachment between the reinforcement and the matrix. The tensile strength of the composites tended to increase as greater amounts of coconut fibres were added to the matrix. The averages were around 6.51 to 6.72 MPa for composites with 30 and 60% fibres, respectively. Therefore, coconut fibres can be considered as an alternative to synthetic fibres commonly used in composites, and they can b... Mostrar Tudo |
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Palavras-Chave: |
Thermoset matrices. |
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Categoria do assunto: |
-- |
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Marc: |
LEADER 02357naa a2200241 a 4500
001 2124574
005 2022-08-16
008 2020 bl uuuu u00u1 u #d
024 7 $a10.1177/0021998320940023$2DOI
100 1 $aFARIA, D. L.
245 $aPhysical and mechanical properties of polyurethane thermoset matrices reinforced with green coconut fibres.$h[electronic resource]
260 $c2020
300 $a4841-4852
520 $aCurrently, the use of composites to replace parts made only with plastics has been gradually employed. The advantages of these composites are low cost, high availability of raw materials and good physical and mechanical properties. Thus, this work aimed at producing and characterizing composites produced with coconut fibre reinforced polyurethane matrices. The coconut fibres were studied as to their chemical constituents, aspect ratio, bulk density, pH, tensile properties, and surface SEM images. The composites were prepared using the hand lay-up process and four different concentrations of coconut fibre were evaluated: 30, 40, 50, and 60%. The composites were assessed as for water absorption after 20 days of immersion, bulk density, impact IZOD, tensile tests, and visualize the matrix-reinforcement interface using SEM. The electron micrographs showed a great deal of impurities on the surface of coconut fibres, such as greases, waxes, and gums, due to the high amount of extraction material (19.78%), which damages the adherence of the polymer onto the coconut fibre and, as observed, cause detachment between the reinforcement and the matrix. The tensile strength of the composites tended to increase as greater amounts of coconut fibres were added to the matrix. The averages were around 6.51 to 6.72 MPa for composites with 30 and 60% fibres, respectively. Therefore, coconut fibres can be considered as an alternative to synthetic fibres commonly used in composites, and they can be used at a ratio of 60% without prejudicing the properties of the composites, making them lighter and cheaper.
653 $aThermoset matrices
700 1 $aMESQUITA JUNIOR, L.
700 1 $aRESENDE, A. A.
700 1 $aLOPES, D. E.
700 1 $aMENDES, L. M.
700 1 $aMARTINS, M. A.
700 1 $aMARCONCINI, J. M.
700 1 $aGUIMARÃES JUNIOR, J. B.
773 $tJournal of Composite Materials$gv. 54, n. 30, 2020.
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