Molecular grafted of nanoparticles on sisal fibers: adhesion with cementitious matrices and novel functionalities

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MetadadosDescriçãoIdioma
Autor(es): dc.creatorSantos, R. D.-
Autor(es): dc.creatorThomas, S.-
Autor(es): dc.creatorFerreira, S. R.-
Autor(es): dc.creatorSilva, F. A.-
Autor(es): dc.creatorCombariza, M. Y.-
Autor(es): dc.creatorBlanco-Tirado, C.-
Autor(es): dc.creatorOvalle-Serrano, S. A.-
Autor(es): dc.creatorSouza Junior, F. G.-
Autor(es): dc.creatorOliveira, G. E.-
Autor(es): dc.creatorToledo Filho, R. D.-
Data de aceite: dc.date.accessioned2026-02-09T11:38:28Z-
Data de disponibilização: dc.date.available2026-02-09T11:38:28Z-
Data de envio: dc.date.issued2022-01-28-
Data de envio: dc.date.issued2022-01-28-
Data de envio: dc.date.issued2021-06-15-
Fonte completa do material: dc.identifierhttps://repositorio.ufla.br/handle/1/49086-
Fonte completa do material: dc.identifierhttps://www.sciencedirect.com/science/article/abs/pii/S0022286021003021-
Fonte: dc.identifier.urihttp://educapes.capes.gov.br/handle/capes/1144147-
Descrição: dc.descriptionCement materials have good compression strength, but poor tensile resistence. Aiming to improve this property, natural fibers can be applied as reinforcement. However, natural fibers have low adhesion with cement, and surface treatments are needed. In this work, sisal fibers were submitted to a cationization process followed by the grafting of two kinds of nanoparticles, Fe2O3 and MnO2. It is a usual treatment to dye fibers to the fabrics. The fibers microstructural characteristics were evaluated, before and after treatment, by using FTIR, XRD, TGA, DSC, SEM, water absorption, and tensile strength tests. The effect of the nanoparticles on the sisal fiber-cement matrix adhesion was evaluated by single fiber pull-out tests. The results show the cationization process removes part of lignin, increasing the fiber crystallinity, while the grafting of nanoparticles reduces the fiber crystalline degree, which indicates that nanoparticles grafting in the lignin spaces. The nanoparticles grafting acts as a catalyst of cellulose formation during the thermal degradation changing the initial fiber degradation profile. All treatments have caused a reduction in the absorbed water amount, become the fibers more stable dimensionally. They have improved the fiber adhesion on the cementitious matrix, being the sisal fiber grafting with MnO2 the best result.-
Idioma: dc.languageen-
Publicador: dc.publisherElsevier-
Direitos: dc.rightsrestrictAccess-
???dc.source???: dc.sourceJournal of Molecular Structure-
Palavras-chave: dc.subjectSisal fibers-
Palavras-chave: dc.subjectCementitious composites-
Palavras-chave: dc.subjectNanoparticles grafting-
Palavras-chave: dc.subjectSurface chemical modification-
Título: dc.titleMolecular grafted of nanoparticles on sisal fibers: adhesion with cementitious matrices and novel functionalities-
Tipo de arquivo: dc.typeArtigo-
Aparece nas coleções:Repositório Institucional da Universidade Federal de Lavras (RIUFLA)

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