Journal
CARBOHYDRATE POLYMERS
Volume 89, Issue 2, Pages 504-510Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.carbpol.2012.03.035
Keywords
Biodegradable film; Biopolymer; Mechanical properties; WVP; TPS
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Funding
- CNPq
- CAPES
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The aim of this study was to produce thermoplastic starch (TPS) films and to enhance their properties by reinforcing them with hydrophilic and hydrophobic nanoclays. TPS films were prepared by extrusion and thermopressing, and their crystallinity, water vapor permeability (WVP), and mechanical properties were studied. The hydrophilic nanoclay lowered the material WVP due to the formation of an intercalated composite. The hydrophobic nanoclays increased the rigidity of the films but did not alter the tensile strength. The blending of nanoclays with thermoplastic starch modifies the mechanical properties and WVP, and these changes are strongly associated with the dispersion of nanoclay in the polymer matrix. The dispersion, in turn, depends on the compatibility of the matrix and the nanoclay in terms of the hygroscopicity and the concentration in which the nanoclay is used. The addition of nanoclays to starch-based films is a promising way to enhance them for industrial manufacture. (C) 2012 Elsevier Ltd. All rights reserved.
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