Biobased composites from glyoxal-phenolic resins and sisal fibers
RAMIRES, Elaine C.
Unité des Sciences du bois et des biopolymères [Us2b]
Inst Quim Sao Carlos [Univ Sao Paulo]
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Unité des Sciences du bois et des biopolymères [Us2b]
Inst Quim Sao Carlos [Univ Sao Paulo]
RAMIRES, Elaine C.
Unité des Sciences du bois et des biopolymères [Us2b]
Inst Quim Sao Carlos [Univ Sao Paulo]
Unité des Sciences du bois et des biopolymères [Us2b]
Inst Quim Sao Carlos [Univ Sao Paulo]
CASTELLAN, Alain
Laboratoire de Chimie des Polymères Organiques [LCPO]
Team 2 LCPO : Biopolymers & Bio-sourced Polymers
< Leer menos
Laboratoire de Chimie des Polymères Organiques [LCPO]
Team 2 LCPO : Biopolymers & Bio-sourced Polymers
Idioma
en
Article de revue
Este ítem está publicado en
Bioresource Technology. 2010, vol. 101, n° 6, p. 1998-2006
Elsevier
Resumen en inglés
Lignocellulosic materials can significantly contribute to the development of biobased composites. In this work, glyoxal-phenolic resins for composites were prepared using glyoxal, which is a dialdehyde obtained from several ...Leer más >
Lignocellulosic materials can significantly contribute to the development of biobased composites. In this work, glyoxal-phenolic resins for composites were prepared using glyoxal, which is a dialdehyde obtained from several natural resources. The resins were characterized by (1)H, (13)C, (2)D, and (31)P NMR spectroscopies. Resorcinol (10%) was used as an accelerator for curing the glyoxal-phenol resins in order to obtain the thermosets. The impact-strength measurement showed that regardless of the cure cycle used, the reinforcement of thermosets by 30% (w/w) sisal fibers improved the impact strength by one order of magnitude. Curing with cycle 1 (150 degrees C) induced a high diffusion coefficient for water absorption in composites, due to less interaction between the sisal fibers and water. The composites cured with cycle 2 (180 degrees C) had less glyoxal resin coverage of the cellulosic fibers, as observed by images of the fractured interface observed by SEM. This study shows that biobased composites with good properties can be prepared using a high proportion of materials obtained from natural resources.< Leer menos
Palabras clave en inglés
Phenolic matrix
Sisal fibers
Glyoxal
Biobased composite
Orígen
Importado de HalCentros de investigación