Data/hora: 10/06/2024 07:57:52

Provedor de dados: 	Brazilian Archives of Biology and Technology	
País: 	Brazil	
Título: 	Biodegradable foams based on starch, polyvinyl alcohol, chitosan and sugarcane fibers obtained by extrusion	
Autores: 	Debiagi,Flávia; Mali,Suzana; Grossmann,Maria Victória Eiras; Yamashita,Fábio.	
Data: 	2011-10-01	
Ano: 	2011	
Palavras-chave: 	Cassava starch; Mechanical properties; Microstructure; Expansion.	
Resumo: 	Biodegradable foams made from cassava starch, polyvinyl alcohol (PVA), sugarcane bagasse fibers and chitosan were obtained by extrusion. The composites were prepared with formulations determined by a constrained ternary mixtures experimental design, using as variables: (X1) starch / PVA (100 - 70%), (X2) chitosan (0 - 2%) and (X3) fibers from sugar cane (0 - 28%). The effects of varying proportions of these three components on foam properties were studied, as well the relationship between their properties and foam microstructure. The addition of starch/PVA in high proportions increased the expansion index and mechanical resistance of studied foams. Fibers addition improved the expansion and mechanical properties of the foams. There was a trend of red and yellow colors when the composites were produced with the highest proportions of fibers and chitosan, respectively. All the formulations were resistant to moisture content increase until 75% relative humidity of storage.	
Tipo: 	Info:eu-repo/semantics/article	
Idioma: 	Inglês	
Identificador: 	http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-89132011000500023	
Editor: 	Instituto de Tecnologia do Paraná - Tecpar	
Relação: 	10.1590/S1516-89132011000500023	
Formato: 	text/html	
Fonte: 	Brazilian Archives of Biology and Technology  v.54 n.5 2011	
Fonte: 	info:eu-repo/semantics/openAccess