Registro completo |
Provedor de dados: |
BABT
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País: |
Brazil
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Título: |
Properties of extruded xanthan-starch-clay nanocomposite films
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Autores: |
Melo,Cristina de
Garcia,Patrícia Salomão
Grossmann,Maria Victória Eiras
Yamashita,Fábio
Dall'Antônia,Luiz Henrique
Mali,Suzana
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Data: |
2011-12-01
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Ano: |
2011
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Palavras-chave: |
Film blowing
Cassava starch
Microstructure
Mechanical properties
Water vapor permeability
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Resumo: |
The aim of this work was to manufacture the biodegradable nanocomposite films by extrusion from different combinations of cassava starch, xanthan gum and nanoclays (sodium montmorillonite - MMT- Na) and to characterize them according to their microstructure, optical, mechanical and barrier properties. Films were manufactured from nine starch/xanthan/nanoclay combinations, containing glycerol as plasticizer. Scanning electron microscopy (SEM) of the starch-xanthan extruded films showed reticulated surface and smooth interior, indicating that the gum was mostly concentrated on the surface of the films, while starch/xanthan/nanoclays films showed a more homogeneous surface, suggesting that the introduction of nanoclays provided a better biopolymeric interaction. In general, nanoclays addition (2.5 - 5.0, w%) generated more transparent and resistant films, with lower water vapor permeabilities and lower water sorption capacities and xanthan gum addition improved the elongation ofa starch films.
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Tipo: |
Info:eu-repo/semantics/article
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Idioma: |
Inglês
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Identificador: |
http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-89132011000600019
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Editor: |
Instituto de Tecnologia do Paraná - Tecpar
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Relação: |
10.1590/S1516-89132011000600019
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Formato: |
text/html
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Fonte: |
Brazilian Archives of Biology and Technology v.54 n.6 2011
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Direitos: |
info:eu-repo/semantics/openAccess
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