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Structural disorganization and chain aggregation of high-amylose starch in different chloride salt solutions

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Li, Ying, Liu, Peng, Ma, Cong, Zhang, Na, Shang, Xiaoqin, Wang, Liming and Xie, Fengwei (2020) Structural disorganization and chain aggregation of high-amylose starch in different chloride salt solutions. ACS Sustainable Chemistry & Engineering, 8 (12). pp. 4838-4847. doi:10.1021/acssuschemeng.9b07726

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WRAP-structural-disorganization-chain-aggregation-high-amylose-starch-different-chloride-salt-solutions-Xie-2020.pdf - Accepted Version
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Official URL: http://dx.doi.org/10.1021/acssuschemeng.9b07726

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Abstract

As high-amylose starch (HAS) has a higher content of linearly structured chains than other types of starch, it is more scientifically interesting to realize enhanced properties or new functions for food and materials applications. However, the full dissolution of the compact granule structure of HAS is challenging under moderate conditions, which limits its applications. Here, we have revealed that the granule structure of HAS can be easily destructed by certain concentrations of acidic ZnCl2, neutral MgCl2, and alkaline CaCl2 solutions (43, 34, and 31 wt %, respectively) at a moderate temperature (under 50 °C). The ZnCl2 and CaCl2 solutions resulted in complete dissolution of HAS granules, whereas small amounts of HAS granule remnants still existed in the MgCl2 solution. The regenerated starch from the CaCl2 solution was completely amorphous, that from the ZnCl2 solution only presented a weak peak at 17°, and that from the MgCl2 solution contained V-type crystallites. No new reflections were found on the FTIR spectra indicating that all these three chloride solutions can be considered as a nonderivatizing solvent for starch. In all the three cases, nanoparticles were formed in the regenerated starch, which could be due to the aggregation of starch chains or their complexation with the metal cation. In addition, their water absorption ratio was 1.5 to 3 times that of the control (treated in water).

Item Type: Journal Article
Subjects: Q Science > QC Physics
Q Science > QD Chemistry
Q Science > QP Physiology
T Technology > TA Engineering (General). Civil engineering (General)
T Technology > TP Chemical technology
Divisions: Faculty of Science > WMG (Formerly the Warwick Manufacturing Group)
Library of Congress Subject Headings (LCSH): Starch, Amylodextrins, Biopolymers, Chlorides, Dissolution (Chemistry), Nanostructured materials, Rheology
Journal or Publication Title: ACS Sustainable Chemistry & Engineering
Publisher: American Chemical Society
ISSN: 2168-0485
Official Date: 30 March 2020
Dates:
DateEvent
30 March 2020Published
20 February 2020Available
20 February 2020Accepted
Date of first compliant deposit: 7 April 2020
Volume: 8
Number: 12
Page Range: pp. 4838-4847
DOI: 10.1021/acssuschemeng.9b07726
Status: Peer Reviewed
Publication Status: Published
Publisher Statement: This document is the Accepted Manuscript version of a Published Work that appeared in final form in ACS Sustainable Chemistry & Engineering, copyright © American Chemical Society after peer review and technical editing by the publisher. To access the final edited and published work see http://dx.doi.org/10.1021/acssuschemeng.9b07726
Access rights to Published version: Restricted or Subscription Access
RIOXX Funder/Project Grant:
Project/Grant IDRIOXX Funder NameFunder ID
2018A0303130048Natural Science Foundation of Guangdong Provincehttp://dx.doi.org/10.13039/501100003453
201610010019Pearl River S and T Nova Program of Guangzhouhttp://dx.doi.org/10.13039/501100009334
21106023[NSFC] National Natural Science Foundation of Chinahttp://dx.doi.org/10.13039/501100001809
798225Horizon 2020 Framework Programmehttp://dx.doi.org/10.13039/100010661
GXPSMM18ZD-02Guangxi Key Laboratory of Petrochemical Resource Processing and Process Intensification Technology, Guangxi Universityhttp://dx.doi.org/10.13039/501100012298

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