Produção Nacional
Revisado por pares
Development of composites based on recycled polyethylene/sugarcane bagasse fibers
2013; Wiley; Volume: 35; Issue: 4 Linguagem: Inglês
10.1002/pc.22720
ISSN1548-0569
AutoresAlberto Gomes Vieira de Carvalho Neto, Thiago Amaral Ganzerli, Adriano Luciano Cardozo, Sílvia Luciana Fávaro, Antonio G.B. Pereira, Emerson M. Girotto, Eduardo Radovanovic,
Tópico(s)Nanocomposite Films for Food Packaging
ResumoIn this work, sugarcane bagasse fibers were used as filler in composites having recycled high‐density polyethylene (PEr) as matrix. Because of the poor interaction between fibers surface and the PEr, the surface of bagasse was chemically modified. This modification consists of washing with water at 80°C, a mercerization process using sodium hydroxide and acetylation reaction with acetic anhydride. The chemical modification was characterized by Fourier transform infrared–horizontal attenuated total reflectance (FTIR‐HATR) and 13 C nuclear magnetic resonance spectroscopies (NMR), thermogravimetric analysis (TGA), and scanning electronic microscopy (SEM). The composites were prepared from modified and unmodified fibers into PEr matrix, containing 5, 10, and 20% (w/w) of fiber. The samples were processed by extrusion and molds were prepared by injection process in order to perform mechanical tests. These materials were analyzed by SEM, TGA, and the water uptake was evaluated. Also, their mechanical properties were analyzed. Morphological analysis indicated that the chemical modification of sugarcane bagasse increased the compatibility between matrix and reinforcement. Tensile, flexural, and impact tests showed that the mechanical properties of the composite were improved compared to PEr due to the presence of the fibers. POLYM. COMPOS., 35:768–774, 2014. © 2013 Society of Plastics Engineers
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