Thermal and morphological behavior of EVOH/piassava fiber composites
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2012
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CHARACTERIZATION OF MINERALS, METALS, AND MATERIALS. 141th; ANNUAL MEETING & EXIBITION
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Composite consisting of ethylene vinyl alcohol (EVOH) with short piassava fibers were prepared
by extrusion process and their thermal and morphological behavior were investigated. The
EVOH reinforced with 5 and 10 % of piassava {Attaleafimifera Mart) fiber particle, based on the
percentage weight ratio (wt %), untreated and treated with a commercial silane coupling agent,
were prepared and the influence of fiber loading and the effect of chemical treatment on their
thermal and morphological behavior were evaluated by SEM, DSC and TG analyses. Melt flow
index (MFI) of the composites have been determined to evaluate the effects of fiber
reinforcement on dynamic viscoelastic melt of the EVOH. In addition, piassava fibers
characterization by SEM, FTIR, and organic and inorganic composition have also been carried
out. The SEM results of the composites showed surface micrographs without microvoids and a
good distribution, dispersion and compatibility between the fillers and the EVOH matrix.
Concerning the piassava fibers characterization, the results showed that piassava has higher
lignin content than cellulose and hemicelluloses, and around 0.7 % of ash with 52 % of silica
(Si02). This high concentration of silica is consistent with the SEM analysis of the fiber that
showed a large amount of "silica rings" encrusted on their surface.
Como referenciar
NOGUEIRA, BEATRIZ R.; CHINELLATO, ANNE; ORTIZ, ANGEL V.; PARVEEN, ARIFA; RANGARI, VIJAYA K.; MOURA, ESPERIDIANA A.B. Thermal and morphological behavior of EVOH/piassava fiber composites. In: HWANG, JIANN-YANG (ed.); MONTEIRO, SERGIO N. (ed.); BAI, CHENGGUANG (ed.); CARPENTER, JOHN (ed.); CAI, MINGDONG (ed.); FIRRAO, DONATO (ed.); KIM, BUOUNG-GON (ed.). In: CHARACTERIZATION OF MINERALS, METALS, AND MATERIALS. 141th; ANNUAL MEETING & EXIBITION, March 11-15, 2012, Orlando, Florida, USA. Proceedings... Hoboken, NJ, USA: John Wiley & Sons, Inc., 2012. p. 373-380. DOI: 10.1002/9781118371305.ch44. Disponível em: http://repositorio.ipen.br/handle/123456789/27636. Acesso em: 19 Mar 2025.
Esta referência é gerada automaticamente de acordo com as normas do estilo IPEN/SP (ABNT NBR 6023) e recomenda-se uma verificação final e ajustes caso necessário.