Journal
JOURNAL OF COMPOSITE MATERIALS
Volume 51, Issue 25, Pages 3481-3489Publisher
SAGE PUBLICATIONS LTD
DOI: 10.1177/0021998317690446
Keywords
Composite; natural fibers; fiber/matrix bond; mechanical properties; degradation
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The use of lignocellulosic fibers derived from renewable resources as a reinforcing phase in polymeric matrix composites provides positive environmental benefits with respect to ultimate disposability and raw material use. Despite the attractive properties, lignocellulosic fillers are used only to a limited extent in industrial practice due to the restriction to 200 degrees C in composites processing temperatures. Lignocellulosic materials start to degrade near 230 degrees C. This limits the type of thermoplastics that can be used in association with polysaccharide fillers. To overcome these disadvantages, chemical treatments, i.e. alkaline treatment, were applied to curaua fibers to improve the thermal properties. Colorimetry was employed to evaluate the extension of darkening of composites prepared with treated curaua and Avicel. Fourier-transform infrared spectra of polyamide composites with treated curaua showed no differences when compared to pure polyamide. Moreover, no changes in molar mass were observed in microcrystalline cellulose processed in different temperatures.
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