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BIBTEX RIS

Propriedades físicas de filmes biodegradáveis à base de amido de mandioca, álcool polivinílico e montmorilonita

2012; Brazilian Chemical Society; Volume: 35; Issue: 3 Linguagem: Inglês

10.1590/s0100-40422012000300009

ISSN

1678-7064

Autores

Fernando de Oliveira Faria, Ana Elisa Stefani Vercelheze, Suzana Mali,

Tópico(s)

Nanocomposite Films for Food Packaging

Resumo

STARCH, POLYVINYL ALCOHOL AND MONTMORILLONITE.The objective of this work was to manufacture biodegradable films based on cassava starch, polyvinyl alcohol (PVA) and sodium montmorillonite (Na-MMT), using glycerol as a plasticizer.These films were characterized according to their microstructure, optical, mechanical, and barrier properties.The combination of starch-PVA-MMT resulted in films with a more homogeneous surface than starch films.The introduction of PVA into the starch matrix led to the formation of films with lower water vapor permeability (WVP), higher tensile strength and greater elongation.MMT was exfoliated in the films, resulting in greater stability for different relative humidities, lower WVP, higher resistance and lower flexibility.

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