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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 Embargoed item. Restricted access to Repository staff only until 20 February 2021. Contact author directly, specifying your specific needs. - Requires a PDF viewer. Download (2192Kb) |
Official URL: http://dx.doi.org/10.1021/acssuschemeng.9b07726
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 | ||||||||||||||||||
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| 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 |
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| 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: |
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| 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: |
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