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Structure and properties of corn starch synthesized by using sulfobetaine and deoxycholic acid.

Authors :
Yun L
Liu C
Li K
Deng L
Li J
Source :
International journal of biological macromolecules [Int J Biol Macromol] 2021 Jul 31; Vol. 183, pp. 1293-1301. Date of Electronic Publication: 2021 May 15.
Publication Year :
2021

Abstract

Novel starch polymers (sulfobetaine-starch-deoxycholic acid) were first synthesized by grafting zwitterionic sulfobetaine and deoxycholic acid onto corn starch molecules. In order to explore the mechanism of modified starch, the chemical structure, morphological properties, thermal stability, and self-assembly performance of modified corn starch were determined. Preliminary structural characterization, using NMR, demonstrated that the glucose carbon C6 was the main etherification grafting site and C2 and C3 were the esterification grafting sites. This was confirmed using FT-IR to detect the presence of a new carbonyl signal around 1739 cm <superscript>-1</superscript> . XRD, SEM, and PLM micrographs showed structural losses in the starch granule. Thermogravimetric analysis showed an increase in thermal stability with etherification and esterification in nature. Self-assembly performance analysis demonstrated that the polymer formed more thermodynamically stable micelles under highly diluted conditions. This work will help expand the space for starch application.<br /> (Copyright © 2021. Published by Elsevier B.V.)

Details

Language :
English
ISSN :
1879-0003
Volume :
183
Database :
MEDLINE
Journal :
International journal of biological macromolecules
Publication Type :
Academic Journal
Accession number :
34004197
Full Text :
https://doi.org/10.1016/j.ijbiomac.2021.05.078