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Lookup NU author(s): Professor David XieORCiD
This is the authors' accepted manuscript of an article that has been published in its final definitive form by Wiley, 2017.
For re-use rights please refer to the publisher's terms and conditions.
Zinc chloride aqueous solution is a non-derivatizing solvent for starch, and can be used as a media for homogeneous starch modification. Here, the rheological properties of starch in ZnCl2 aqueous solution under different conditions are considered. Specifically, a large number (120) of viscosity–shear-rate curves for starch–ZnCl2 solutions with different starch contents, ZnCl2 concentrations, and temperatures were obtained and modeled using a master curve method. In particular, the power-law index (n) from the modeling could accurately classify the starch molecules in ZnCl2 aqueous solutions into an insoluble state, a dilute state, a semi-dilute state, and a sticky state, reflecting the different degrees of chain interactions in the solution. In particular, the sticky state would be mostly likely be controlled by the zinc–starch complex, which made the rheological behavior entirely different from that at low ZnCl2 concentrations. The knowledge obtained from this study can be used to guide the homogeneous modification of starch and the fabrication of starch-based materials using green solvents such as aqueous ZnCl2 with desired properties.
Author(s): Chen X, Liu P, Shang X, Xie F, Jiang H, Wang J
Publication type: Article
Publication status: Published
Journal: Starch
Year: 2017
Volume: 69
Issue: 9-10
Print publication date: 01/09/2017
Online publication date: 20/04/2017
Acceptance date: 12/04/2017
Date deposited: 23/05/2023
ISSN (print): 0038-9056
ISSN (electronic): 1521-379X
Publisher: Wiley
URL: https://doi.org/10.1002/star.201600384
DOI: 10.1002/star.201600384
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