Título:	Exploiting the Amazonian açaí palm leaves potential as reinforcement for cement composites through alkali and bleaching treatments.
Autoria:	GUEDES, C. E. G. OLIVEIRA, D. N. P. S. de BEZERRA, J. B. PENIDO, C. A. F. de O. FERREIRA, N. S. BORGES, W. L. BUFALINO, L. SOUZA, T. M.
Afiliação:	CARLOS EDUARDO GOUVEIA GUEDES, UNIFAP DHIMITRIUS NEVES PARAGUASSÚ SMITH DE OLIVEIRA, POLITEC-AP JEFFERSON BEZERRA BEZERRA, UNIFAP CIRO AUGUSTO FERNANDES DE OLIVEIRA PENIDO, POLITEC-AP NILSON SANTOS FERREIRA, UFS WARDSSON LUSTRINO BORGES, CPAF-AP LINA BUFALINO, UFRA TIAGO MARCOLINO SOUZA, UEAP.
Ano de publicação:	2021
Referência:	Journal of Natural Fibers, v. 1, p. 1-14, 2021.
Conteúdo:	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
Palavras-chave:	Fiber morphology Ceramic matrix Portland cement
Tipo do material:	Artigo de periódico
Acesso:	openAccess
Aparece nas coleções:	Artigo em periódico indexado (CPAF-AP)