Curaua and eucalyptus nanofibers films by continuous casting: Mechanical and thermal properties

Claro, Pedro Ivo Cunha; Corrêa, Ana Carolina; Campos, Adriana de; Rodrigues, Vanessa Bolzan; Luchesi, Bruno Ribeiro; Silva, Luiz Eduardo; Mattoso, Luiz H. C.; Marconcini, J. M.

doi:10.1016/j.carbpol.2017.11.037

Cited by 29 publications

(22 citation statements)

References 30 publications

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“…As shown in Figure 4, the peak is not very sharp and of less height, it represents slow reaction which starts at some point of temperature; as temperature increases, it heats up with the increase in reaction and then with further increase in temperature, the reaction slowly ends up. 11 Thermal kinetic analysis. The kinetic study was performed using equations (8) and (9) of KAS and FWO methods, respectively.…”

Section: Fiber Characterizationmentioning

confidence: 99%

Characterization and thermal kinetic analysis of pineapple leaf fibers and their reinforcement in epoxy

Jain

Sinha

2018

Journal of Elastomers & Plastics

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The progress in the development of composites with natural fibers for various applications in different sectors witnesses remarkable success worldwide in the last decade. Among the various natural fibers existing worldwide, pineapple leaf fibers (PALFs) possess remarkable mechanical properties because of the maximum content of cellulose (*80%) among all natural fibers. In spite of having few limitations such as hydrophilicity, its advantages such as low cost, low weight, and biodegradability overweigh their limitations. The PALFs are poorly reported in the literature as a reinforcement in epoxy material. Bagasse, wheat straw, and coir have been successfully reinforced with epoxy resin; but inspite of having highest tensile strength among all natural fibers, PALF's are seldom used. PALF has been characterized chemically, morphologically, and thermally. Using thermal analysis, the models were fitted to calculate its activation energies at different fraction levels using different heating rates. PALF epoxy composites have been prepared using the hand layup method. The effect of fiber loading has also been studied for morphological, chemical, mechanical, and thermal properties of composites. Composites with 10% fiber loading have better mechanical properties in comparison to composites with other fiber loading. Scanning electron microscopic micrographs of fractured surfaces have been analyzed for all fiber loading composites, and the results have been successfully studied linking the stated work of other distinguished researchers of this arena.

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Section: Fiber Characterizationmentioning

confidence: 99%

Characterization and thermal kinetic analysis of pineapple leaf fibers and their reinforcement in epoxy

Jain

Sinha

2018

Journal of Elastomers & Plastics

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“…The casting process is widely used to produce nanocomposites in literature; although its productivity is lower than other usual thermal methods such as extrusion, it avoids degradation during the process and allows production of oriented structures. Recently, several methods have been reported to improve the productivity of the casting method, e.g., continuous casting, which will reduce the difference from traditional methods [36,37].…”

Section: Resultsmentioning

confidence: 99%

Composite films of ecofriendly lignocellulosic nanostructures in biodegradable polymeric matrix

2019

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Cellulose nanostructures (CNS) are an alternative for reinforcement of biodegradable polymers. However, the usual process applied to obtain them is environmentally harmful, generating chemical wastes, mostly in the lignin removal process. In this work, bionanocomposites reinforced with CNS were obtained using a process with lower environmental impact, viz. enzymatic hydrolysis of Pinus wood, with or without alkaline pretreatment for lignin removal. They were then incorporated into poly(butylene adipate-co-terephthalate) (PBAT) at 1%, 3%, and 5% (wt./wt.) by a solvent casting process with a nonionic surfactant as surface modification agent. The properties of the obtained composites indicated that pretreatment for lignin removal was not necessary to improve the mechanical properties. The isolated nature of the CNS led to a better distribution in the casting process and similar mechanical properties, with an increase in the Young's modulus by 16%. Addition of the surfactant helped improve the dispersion of the reinforcement but did not affect the mechanical properties. The interaction with water was affected by the addition of surfactant, which resulted in a hydrophilic composite and influenced its post-use degradation. The results of this work confirm that it is possible to produce CNS composites without excessive consumption of reagents and that their properties can be modified for use in different packaging applications.

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“…Foi possível observar a presença das bandas características da celulose em todas as amostras, pura ou com látex. Destas bandas, cita-se: a) 1061 cm -1 é atribuída ao alongamento da ligação C-O e a vibração da deformação angular no plano C-H da celulose (ALEMDAR; SAIN, 2008); b) faixa próxima a 2900 cm -1 é atribuída à vibração de alongamento assimétrica do grupo CH, que são típicos de materiais orgânicos; c) região entre 3200 e 3700 cm -1 foi atribuída à vibração de alongamento do grupo hidroxila (OH) (CLARO et al, 2018).…”

Section: Ftir-atrunclassified

Estudo da durabilidade de compósitos cimentícios com polpa de eucalipto modificados com microssílica e látex.

Machado¹

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Primeiramente agradeço a Deus, por ter me dado proteção e me iluminado em mais uma etapa da minha vida. Agradeço aos meus pais, Paulo Miguel Machado e Helenice de Jesus Carvalho Machado, e minha irmã, Isadora Cristina Carvalho Machado, pelo apoio, incentivo e compreensão ao longo de toda minha vida. À Prof. Dra. Leila Aparecida de Castro Motta, orientadora deste trabalho, a quem fica minha admiração, agradeço pela atenção, paciência e conhecimentos valiosos repassados. Ao Dr. Rondinele Alberto dos Reis Ferreira, co-orientador deste trabalho, agradeço por sempre estar disposto a me auxiliar nos experimentos, pelos ensinamentos, incentivos e amizade. Aos meus amigos de república, Lucas, Marco Antônio e Lorrana, agradeço pelos momentos compartilhados e nossa grande amizade, que foi essencial para esta conquista. Aos meus amigos de pós-graduação, em especial, Márcio e Vitor, pelo companheirismo e descontração nos momentos dentro e fora da universidade. Aos funcionários da FECIV. Aos professores que tiveram participação importante para a conclusão deste trabalho, com sugestões e esclarecimentos, em especial, Prof. Dr. Daniel Pasquini. À Cristiane e Lorayne agradeço pela ajuda. Ao Laboratório de Multiusuários do Instituto de Química da UFU pela realização do MEV, EDS e DRX. Ao Laboratório 06 da UFTM pela realização do ângulo de contato. Ao Laboratório de Fotoquímica e Ciência dos Materiais da UFU pela realização do FTIR-ATR. Enfim, agradeço aqueles que contribuíram na realização deste trabalho. MACHADO, P. J. C. Estudo da durabilidade de compósitos cimentícios com polpa de eucalipto modificados com microssílica e látex. 198 p.

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Curaua and eucalyptus nanofibers films by continuous casting: Mechanical and thermal properties

Cited by 29 publications

References 30 publications

Characterization and thermal kinetic analysis of pineapple leaf fibers and their reinforcement in epoxy

Characterization and thermal kinetic analysis of pineapple leaf fibers and their reinforcement in epoxy

Composite films of ecofriendly lignocellulosic nanostructures in biodegradable polymeric matrix

Estudo da durabilidade de compósitos cimentícios com polpa de eucalipto modificados com microssílica e látex.

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