A study of water diffusion into a high-amylose starch blend: The effect of moisture content and temperature

Russo, Melissa A. L., Strounina, Ekaterina, Waret, Muriel, Nicholson, Timothy, Truss, Rowan and Halley, Peter J. (2007) A study of water diffusion into a high-amylose starch blend: The effect of moisture content and temperature. Biomacromolecules, 8 1: 296-301.


Author Russo, Melissa A. L.
Strounina, Ekaterina
Waret, Muriel
Nicholson, Timothy
Truss, Rowan
Halley, Peter J.
Title A study of water diffusion into a high-amylose starch blend: The effect of moisture content and temperature
Journal name Biomacromolecules  (ERA 2012 Listed)    (ERA 2010 Rank A)   Check publisher's open access policy
Publication date 2007-01
Sub-type Article
Year available 2007
DOI 10.1021/bm060791i
Volume number 8
Issue number 1
ISSN 1525-7797
Start page 296
End page 301
Total pages 6
Editor A. Albertsson
Place of publication Washington D.C., USA
Publisher American Chemical Society
Collection year 2008
Language eng
Subject 291499 Materials Engineering not elsewhere classified
671000 Fabricated Metal Products
C1
Abstract The effect of moisture content and temperature on water diffusion into a modified high amylose (<= 90%) maize thermoplastic starch blend was investigated. Gravimetric and magnetic resonance imaging (MRI) studies were conducted to elucidate the diffusion mechanism and diffusion coefficients for this system. The diffusion coefficient data demonstrated that the rate of water diffusion into this blend was significantly dependent upon temperature and moisture content. Water diffusion was faster at higher temperatures and generally for samples stored at higher relative humidity environments. It was revealed from the gravimetric data that water diffusion into this starch blend was Fickian; however, further analysis of the MRI images found that the water diffusion mechanism was exponentially dependent on the concentration. This result was determined by comparing experimental water concentration profiles to a theoretical model calculated using the implicit Crank-Nicolson finite difference method.
Keyword Biochemistry & Molecular Biology
Chemistry, Organic
Polymer Science
Sorption
Tablets
Methacrylate)
Hydrogels
Transport
Systems
Q-Index Code C1
Q-Index Status Confirmed Code

 
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Created: Mon, 18 Feb 2008, 16:01:13 EST