Journal
CARBOHYDRATE POLYMERS
Volume 110, Issue -, Pages 430-439Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.carbpol.2014.04.024
Keywords
Biodegradable; Starch; Poly(lactic acid); Nanoclay; Mechanical properties
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Highly exfoliated, biodegradable thermoplastic starch (TPS)/polylactic acid (PLA)/sodium montmorillonite (NaMMT) nanocomposites were prepared by an eco-friendly approach, involving in-situ gelatinization of potato starch in presence of dispersed nanoclay followed by melt mixing with PLA. The morphological analysis revealed that the NaMMT was selectively dispersed into the TPS in a highly delaminated manner. An increase in mechanical as well as thermomechanical properties was evident in the presence of PLA and more influenced in the presence of clay. The water absorption was significantly decreased in the presence of PLA (similar to 8%) itself and both PLA and clay (similar to 8-12%) in the nanocomposites. The improved mechanical properties along with its biodegradability might lead to a new green material in the area of packaging. (C) 2014 Elsevier Ltd. All rights reserved.
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