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Registro Completo |
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Biblioteca(s): |
Embrapa Instrumentação. |
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Data corrente: |
20/09/2021 |
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Data da última atualização: |
10/06/2022 |
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Tipo da produção científica: |
Artigo em Periódico Indexado |
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Autoria: |
FONSECA, C. S.; SCATOLINO, M. V.; SILVA, L. E.; MARTINS, M. A.; GUIMARÃES JUNIOR, M.; TONOLI, G. H. D. |
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Afiliação: |
MARIA ALICE MARTINS, CNPDIA. |
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Título: |
Valorization of jute biomass: Performance of fiber-cement composites extruded with hybrid reinforcement (fibers and nanofibrils). |
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Ano de publicação: |
2021 |
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Fonte/Imprenta: |
Waste and Biomass Valorization, v. 12, 2021). |
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Páginas: |
5743?5761 |
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DOI: |
https://doi.org/10.1007/s12649-021-01394-1 |
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Idioma: |
Inglês |
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Conteúdo: |
In this study, the characteristics of jute fbers and cellulose nanofbrils (CNFs) and their impacts on mechanical strength were compared, particularly from the standpoint of their application as reinforcement in extruded fber–cement composites. Raw jute fbers were subjected to an alkaline treatment before being fbrillated into CNFs. The fber–cement composites were produced with jute fbers (0.5% and 2%) and CNFs (0.5% and 2%) via extrusion process. Both percentages of reinforcement were based on the cement mass. In addition, hybrid composites with a mixture of fbers and CNFs were produced. Hydroxypropyl methylcellulose and carboxylic polyether were used as additives to improve the mixture’s rheology. The composites were subjected to natural weathering for 5 months before being analyzed for their physical and mechanical properties. CNFs and jute fbers subjected to NaOH treatment presented a higher initial degradation temperature (Tonset). The apparent porosity decreased for all compositions studied, reaching a 75% reduction for the sample reinforced with 2% CNFs. Fiber–cement with a hybrid reinforcement of 1.5% CNFs+0.5% fbers exhibited the strongest mechanical performance. All compositions showed a decrease in the modulus of elasticity after natural weathering. In contrast, the modulus of rupture and the limit of proportionality showed an average gain of 1 MPa for fber–cement composites produced with hybrid reinforcements. The better mechanical performance of the hybrid formulations may be owing to the synergistic work of the fbers and CNFs, suggesting the potential of cellulose CNFs for use as reinforcement in cement-based composites. MenosIn this study, the characteristics of jute fbers and cellulose nanofbrils (CNFs) and their impacts on mechanical strength were compared, particularly from the standpoint of their application as reinforcement in extruded fber–cement composites. Raw jute fbers were subjected to an alkaline treatment before being fbrillated into CNFs. The fber–cement composites were produced with jute fbers (0.5% and 2%) and CNFs (0.5% and 2%) via extrusion process. Both percentages of reinforcement were based on the cement mass. In addition, hybrid composites with a mixture of fbers and CNFs were produced. Hydroxypropyl methylcellulose and carboxylic polyether were used as additives to improve the mixture’s rheology. The composites were subjected to natural weathering for 5 months before being analyzed for their physical and mechanical properties. CNFs and jute fbers subjected to NaOH treatment presented a higher initial degradation temperature (Tonset). The apparent porosity decreased for all compositions studied, reaching a 75% reduction for the sample reinforced with 2% CNFs. Fiber–cement with a hybrid reinforcement of 1.5% CNFs+0.5% fbers exhibited the strongest mechanical performance. All compositions showed a decrease in the modulus of elasticity after natural weathering. In contrast, the modulus of rupture and the limit of proportionality showed an average gain of 1 MPa for fber–cement composites produced with hybrid reinforcements. The better mechanical performance of the hybrid formul... Mostrar Tudo |
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Palavras-Chave: |
Cellulose fibers; CNF; Lignocellulose fiber; Mechanical fibrillation. |
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Categoria do assunto: |
-- |
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Marc: |
LEADER 02477naa a2200253 a 4500
001 2134590
005 2022-06-10
008 2021 bl uuuu u00u1 u #d
024 7 $ahttps://doi.org/10.1007/s12649-021-01394-1$2DOI
100 1 $aFONSECA, C. S.
245 $aValorization of jute biomass$bPerformance of fiber-cement composites extruded with hybrid reinforcement (fibers and nanofibrils).$h[electronic resource]
260 $c2021
300 $a5743?5761
520 $aIn this study, the characteristics of jute fbers and cellulose nanofbrils (CNFs) and their impacts on mechanical strength were compared, particularly from the standpoint of their application as reinforcement in extruded fber–cement composites. Raw jute fbers were subjected to an alkaline treatment before being fbrillated into CNFs. The fber–cement composites were produced with jute fbers (0.5% and 2%) and CNFs (0.5% and 2%) via extrusion process. Both percentages of reinforcement were based on the cement mass. In addition, hybrid composites with a mixture of fbers and CNFs were produced. Hydroxypropyl methylcellulose and carboxylic polyether were used as additives to improve the mixture’s rheology. The composites were subjected to natural weathering for 5 months before being analyzed for their physical and mechanical properties. CNFs and jute fbers subjected to NaOH treatment presented a higher initial degradation temperature (Tonset). The apparent porosity decreased for all compositions studied, reaching a 75% reduction for the sample reinforced with 2% CNFs. Fiber–cement with a hybrid reinforcement of 1.5% CNFs+0.5% fbers exhibited the strongest mechanical performance. All compositions showed a decrease in the modulus of elasticity after natural weathering. In contrast, the modulus of rupture and the limit of proportionality showed an average gain of 1 MPa for fber–cement composites produced with hybrid reinforcements. The better mechanical performance of the hybrid formulations may be owing to the synergistic work of the fbers and CNFs, suggesting the potential of cellulose CNFs for use as reinforcement in cement-based composites.
653 $aCellulose fibers
653 $aCNF
653 $aLignocellulose fiber
653 $aMechanical fibrillation
700 1 $aSCATOLINO, M. V.
700 1 $aSILVA, L. E.
700 1 $aMARTINS, M. A.
700 1 $aGUIMARÃES JUNIOR, M.
700 1 $aTONOLI, G. H. D.
773 $tWaste and Biomass Valorization$gv. 12, 2021).
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Embrapa Instrumentação (CNPDIA) |
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| Registros recuperados : 9 | |
| 2. |  | SALES, H. R.; SILVA, R. A.; QUINTELA, E. D.; POSSEBOM, A.; BARRIGOSSI, J. A. F. Aumento da patogenicidade de Metarhizium anisopliae ao Tibraca limbativentris com dose subletal de Tiametoxan. In: SEMINÁRIO JOVENS TALENTOS, 4., 2010, Santo Antônio de Goiás. Resumos apresentados. Santo Antônio de Goiás: Embrapa Arroz e Feijão, 2010. p. 21. (Embrapa Arroz e Feijão. Documentos, 257).| Tipo: Resumo em Anais de Congresso |
| Biblioteca(s): Embrapa Arroz e Feijão. |
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| 8. | | CANOVA, A. J. B.; SOUZA, R. T. de; CONCEIÇÃO, M. A. F.; PELINSON, G. J. B.; SALES, H. A. da S. Evolução da maturação e características físico-químicas da videira "BRS Vitória" em diferentes épocas de poda. In: ENCONTRO DE INICIAÇÃO CIENTÍFICA, 15., 2017.; ENCONTRO DE PÓS-GRADUANDOS DA EMBRAPA UVA E VINHO, 11., 2017, Bento Gonçalves. Resumos...Bento Gonçalves, RS: Embrapa Uva e Vinho, 2017. p. 54.| Tipo: Resumo em Anais de Congresso |
| Biblioteca(s): Embrapa Uva e Vinho. |
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| 9. | | PONTES, E. D. S.; ARAÚJO, M. G. G. de; SALES, H. L. D. de; SILVA, G. S.; SILVA, N. de S.; SOARES, J. K. B.; VIERA, V. B. Propriedades antioxidantes dos extratos da flor e da folha de malvavisco. Cadernos de Ciência & Tecnologia, v. 38, n. 1, e26755, 2021. Título em inglês: Antioxidant properties of malvavisco flower and leaf extracts.| Biblioteca(s): Embrapa Unidades Centrais. |
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| Registros recuperados : 9 | |
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