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Investigation of rheological properties and conformation of cassava starch in zinc chloride solution

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Chen, Xiaodong, Liu, Peng, Shang, Xiaoqin, Xie, Fengwei, Jiang, Huihua and Wang, Jie (2017) Investigation of rheological properties and conformation of cassava starch in zinc chloride solution. Starch - Stärke, 69 (9-10). 1600384. doi:10.1002/star.201600384

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Official URL: http://dx.doi.org/10.1002/star.201600384

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Abstract

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.

Item Type: Journal Article
Subjects: S Agriculture > SB Plant culture
T Technology > TP Chemical technology
Divisions: Faculty of Science > WMG (Formerly the Warwick Manufacturing Group)
Library of Congress Subject Headings (LCSH): Starch -- Research, Cassava, Zinc chloride, Starch crops
Journal or Publication Title: Starch - Stärke
Publisher: Wiley-Blackwell Publishing Ltd.
ISSN: 0038-9056
Official Date: September 2017
Dates:
DateEvent
September 2017Published
20 April 2017Available
12 April 2017Accepted
Volume: 69
Number: 9-10
Article Number: 1600384
DOI: 10.1002/star.201600384
Status: Peer Reviewed
Publication Status: Published
Publisher Statement: This is the peer reviewed version of the following article: Chen, X. , Liu, P. , Shang, X. , Xie, F. , Jiang, H. and Wang, J. (2017), Investigation of rheological properties and conformation of cassava starch in zinc chloride solution. Starch ‐ Stärke, 69: 1600384. doi:10.1002/star.201600384, which has been published in final form at https://doi.org/10.1002/star.201600384. This article may be used for non-commercial purposes in accordance with Wiley Terms and Conditions for Use of Self-Archived Versions.
Access rights to Published version: Restricted or Subscription Access
RIOXX Funder/Project Grant:
Project/Grant IDRIOXX Funder NameFunder ID
21106023[NSFC] National Natural Science Foundation of Chinahttp://dx.doi.org/10.13039/501100001809
31271942[NSFC] National Natural Science Foundation of Chinahttp://dx.doi.org/10.13039/501100001809
2016A010103044 Guangdong Science and Technology Departmenthttp://dx.doi.org/10.13039/501100007162
2013B010403030Guangdong Science and Technology Departmenthttp://dx.doi.org/10.13039/501100007162
1201410965Bureau of Education of Guangzhou MunicipalityUNSPECIFIED
201610010019Pearl River S and T Nova Program of Guangzhouhttp://dx.doi.org/10.13039/501100009334
UNSPECIFIEDGuangzhou da xue‏http://viaf.org/viaf/149744854

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