STARCH/POLY (BUTYLENE ADIPATE-CO-TEREPHTHALATE)/MONTMORILLONITE FILMS PRODUCED BY BLOW EXTRUSION

This study aims to prepare biodegradable films from cassava starch, poly (butylene adipate-co-terephthalate) (PBAT), and montmorillonite (MMT) using blow-extrusion process and analyze the effects of different types and concentrations of MMT on the microstructure, physicochemical, and mechanical prop...

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Bibliographic Details
Published inQuímica Nova Vol. 37; no. 6; pp. 937 - 942
Main Authors Santos, Rodrigo A. L., Muller, Carmen M. O., Grossmann, Maria V. E., Mali, Suzana, Yamashita, Fabio
Format Journal Article
LanguageEnglish
Published Sociedade Brasileira de Química 01.01.2014
Subjects
biodegradable films
intercalated nanocomposites
nanoclays
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Summary:This study aims to prepare biodegradable films from cassava starch, poly (butylene adipate-co-terephthalate) (PBAT), and montmorillonite (MMT) using blow-extrusion process and analyze the effects of different types and concentrations of MMT on the microstructure, physicochemical, and mechanical properties of the resulting films. The films were produced by blending 30% of PBAT with glycerol (17.5%), starch (49.0-52.5%), and four different types of montmorillonite (Cloisite® Na+, 10A, 15A, and 30B) at two different concentrations (1.75% and 3.5%). All the films prepared in this study showed an increase in the basal spacing of MMT layers. In particular, the films with 10A and 30B showed the highest increase in intercalation basal spacing, suggesting the formation of intercalated composites. The addition of nanoclays decreased the elongation of films. The addition of Cloisite® 10A resulted in films with the lowest WVP values and the highest stability to water adsorption under different RH conditions.
ISSN:0100-4042
1678-7064
DOI:10.5935/0100-4042.20140170