The Library
Zinc chloride aqueous solution as a solvent for starch
Tools
Lin, Meiying, Shang, Xiaoqin, Liu, Peng, Xie, Fengwei, Chen, Xiaodong, Sun, Yongyi and Wan, Junyan (2016) Zinc chloride aqueous solution as a solvent for starch. Carbohydrate Polymers, 136 . pp. 266-273. doi:10.1016/j.carbpol.2015.09.007 ISSN 0144-8617.
|
PDF
WRAP-Zinc-chloride-aqueous-solution-solvent-starch-Xie-2016.pdf - Accepted Version - Requires a PDF viewer. Available under License Creative Commons Attribution Non-commercial No Derivatives 4.0. Download (959Kb) | Preview |
Official URL: http://dx.doi.org/10.1016/j.carbpol.2015.09.007
Abstract
It is important to obtain starch-based homogeneous systems for starch modification. Regarding this, an important key point is to find cheap, low-cost and low-toxicity solvents to allow complete dissolution of starch and its easy regeneration. This study reveals that a ZnCl2 aqueous solution is a good non-derivatizing solvent for starch at 50 °C, and can completely dissolve starch granules. The possible formation of a “zinc–starch complex” might account for the dissolution; and the degradation of starch, which was caused by the H+ inZnCl2 aqueous solution, could not contribute to full dissolution. From polarized light microscopic observation combined with the solution turbidity results, it was found that the lowest ZnCl2 concentration for full dissolution was 29.6 wt.% at 50 °C, with the dissolving time being 4 h. Using Fourier-transform infrared (FTIR), solid state 13C nuclear magnetic resonance (NMR), and X-ray diffraction (XRD), it was revealed that ZnCl2 solution had no chemical reaction with starch glucosides, but only weakened starch hydrogen bonding and converted the crystalline regions to amorphous regions. In addition, as shown by intrinsic viscosity and thermogravimetric analysis (TGA), ZnCl2 solution caused degradation of starch macromolecules, which was more serious with a higher concentration of ZnCl2 solution.
Item Type: | Journal Article | ||||||||||||||||||
---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
Subjects: | Q Science > QK Botany T Technology > TP Chemical technology |
||||||||||||||||||
Divisions: | Faculty of Science, Engineering and Medicine > Engineering > Engineering | ||||||||||||||||||
Library of Congress Subject Headings (LCSH): | Starch, Starch -- Synthesis , Zinc chloride , Solvents, Dissolution (Chemistry), Starch -- Dissolution | ||||||||||||||||||
Journal or Publication Title: | Carbohydrate Polymers | ||||||||||||||||||
Publisher: | Pergamon Press | ||||||||||||||||||
ISSN: | 0144-8617 | ||||||||||||||||||
Official Date: | 20 January 2016 | ||||||||||||||||||
Dates: |
|
||||||||||||||||||
Volume: | 136 | ||||||||||||||||||
Page Range: | pp. 266-273 | ||||||||||||||||||
DOI: | 10.1016/j.carbpol.2015.09.007 | ||||||||||||||||||
Status: | Peer Reviewed | ||||||||||||||||||
Publication Status: | Published | ||||||||||||||||||
Access rights to Published version: | Restricted or Subscription Access | ||||||||||||||||||
Date of first compliant deposit: | 11 March 2019 | ||||||||||||||||||
Date of first compliant Open Access: | 11 March 2019 | ||||||||||||||||||
RIOXX Funder/Project Grant: |
|
Request changes or add full text files to a record
Repository staff actions (login required)
View Item |
Downloads
Downloads per month over past year