Document Detail


Studies on the effect of storage time and plasticizers on the structural variations in thermoplastic starch.
MedLine Citation:
PMID:  25439906     Owner:  NLM     Status:  In-Data-Review    
Abstract/OtherAbstract:
Starch was combined with plasticizers such as glycerol, sorbitol, glycerol/sorbitol and urea/ethanolamine blends by means of high shear extrusion process to prepare thermoplastic starch (TPS). Effect of storage time and plasticizers on the structural stability of melt processed TPS was investigated. Morphological observation, X-ray diffraction (XRD) and Fourier transform infrared (FTIR) spectroscopy reveal that melt extrusion process is efficient in transforming granular starch into a plasticized starch for all plasticizer compositions. XRD analysis highlights major changes in the microstructure of plasticized starch, and dependence of crystalline type and degree of crystallinity mainly on the plasticizer composition and storage time. Dynamical mechanical analysis (DMA) yields a decrease of the peak intensity of loss factor with aging time. The effect of ageing on tensile strength also appears to be highly dependent on the plasticizer composition. Thus, through different plasticizer combinations and ageing, starch-based materials with significant differences in tensile properties can be obtained, which may be tuned to meet the requirements of a wide range of applications.
Authors:
H Schmitt; A Guidez; K Prashantha; J Soulestin; M F Lacrampe; P Krawczak
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Publication Detail:
Type:  Journal Article     Date:  2014-09-16
Journal Detail:
Title:  Carbohydrate polymers     Volume:  115     ISSN:  1879-1344     ISO Abbreviation:  Carbohydr Polym     Publication Date:  2015 Jan 
Date Detail:
Created Date:  2014-12-02     Completed Date:  -     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  8307156     Medline TA:  Carbohydr Polym     Country:  England    
Other Details:
Languages:  eng     Pagination:  364-72     Citation Subset:  IM    
Copyright Information:
Copyright © 2014 Elsevier Ltd. All rights reserved.
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