Please use this identifier to cite or link to this item: http://www.alice.cnptia.embrapa.br/alice/handle/doc/1136697
Title: Exploiting the Amazonian açaí palm leaves potential as reinforcement for cement composites through alkali and bleaching treatments.
Authors: GUEDES, C. E. G.
OLIVEIRA, D. N. P. S. de
BEZERRA, J. B.
Ciro Augusto Fernandes de Oliveira Penido
Nilson Santos Ferreira
BORGES, W. L.
BUFALINO, L.
SOUZA, T. M.
Affiliation: CARLOS EDUARDO GOUVEIA GUEDES, UNIFAP; DHIMITRIUS NEVES PARAGUASSÚ SMITH DE OLIVEIRA, POLITEC-AP; JEFFERSON BEZERRA BEZERRA, UNIFAP; WARDSSON LUSTRINO BORGES, CPAF-AP; LINA BUFALINO, UFRA; TIAGO MARCOLINO SOUZA, UEAP.
Date Issued: 2021
Citation: Journal of Natural Fibers, v. 1, p. 1-14, 2021.
Description: Recent investigations proposed alternatives for utilization of Açaí (Euterpe oleracea Mart.) fruit wastes, seeds, and lignocellulosic fibers. However, Açaí leaves may also be obtained without harvesting the palms and could be used in higher value-added products. Alkali reaction (1% and 5% of NaOH), different temperatures (70°C, 80°C, and 100°C), and bleaching were combined to produce fibres from the Açaí leaves. Scanning electron microscopy, X-ray diffraction, and thermogravimetry were used to evaluate the effect of treatments on fibers, whereas X-ray diffraction and calorimetry were employed to characterize Portland cement pastes containing fibers. Results indicated that Açaí leaves could be transformed into short-length fibers with improved degrading temperature. Alkali treatment at 5% sodium hydroxide (90°C) and bleaching increased fibers? crystallinity and showed efficiency in removing non-cellulosic components. Cement paste evaluation also indicated that fibers treated at 5% NaOH solution caused fewer changes in calorimetric profile and therefore present a greater potential for cement-based composites.
Thesagro: Açaí
NAL Thesaurus: Biomass
Thermal stability
Biocomposites
Keywords: Fiber morphology
Ceramic matrix
Portland cement
Language: Ingles
Type of Material: Artigo de periódico
Access: openAccess
Appears in Collections:Artigo em periódico indexado (CPAF-AP)

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