Journal
CARBOHYDRATE POLYMERS
Volume 63, Issue 3, Pages 393-399Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.carbpol.2005.09.006
Keywords
biodegradable; nanocomposites; corn starch; citric acid
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Biodegradable nanocomposites have been successfully fabricated from the thermoplastic cornstarch (TPCS) and activated-montmorillonite (MMT) by melt-intercalation. TPCS was plasticized with novel plasticizers urea and formamide, and the activated-montmorillonite were obtained using citric acid as the activated solvent. Compared with urea and formamide-plasticized thermoplastic cornstarch (UFFPCS), the mechanical properties of nanocomposites were very good. The thermal analysis was investigated by Differential Scanning Calorimetry (DSC). The effect of water content on the mechanical properties of nanocomposites was studied. Dynamic Mechanical Thermal Analysis (DMTA) was also carried out. The structure and morphology of biodegradable nanocomposites were characterized by wide-angle X-ray diffraction (WAXD), scanning electron microscope (SEM) and transmission electron microscope (TEM). It was revealed that UFTPCS were intercalated into the layers of MMT Successfully, and layers of MMT were fully exfoliated and so formed the exfoliated nanocomposites with MMT. This manufacturing process is simple and environmentally friendly. (c) 2005 Published by Elsevier Ltd.
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