Volume 4, Issue 6, December 2016, Page: 212-220
Synthesis and Characterization of Starch Vernolates in Organic Solvents
Tegene Desalegn Zeleke, Department of Chemistry, Adama Science and Technology University, Adama, Ethiopia
Teshome Abdo Segne, Department of Chemistry, Adama Science and Technology University, Adama, Ethiopia
Yonas Chebude, Department of Chemistry, Addis Ababa University, Addis Ababa, Ethiopia
Received: Nov. 13, 2016;       Accepted: Nov. 25, 2016;       Published: Dec. 17, 2016
DOI: 10.11648/j.ajac.20160406.11      View  4490      Downloads  193
Abstract
In this study the synthesis of epoxy fatty acid esters of starch (starch vernolates) by the reaction of cassava starch with vernonia oil methyl ester (epoxy ester) using basic catalyst K2CO3 and organic solvent, DMSO as a reaction medium is presented. Under current reaction conditions, a high degree of substitution of 1.24 was achieved, at a reaction temperature of 110°C and 12 hours of reaction time. The new starch vernolates were characterized by Scanning electron microscopy (SEM) and X-ray diffraction (XRD) indicated that the new product is an amorphous material with a continuous and shapeless morphology. The melting point measured by differential scanning calorimetry (DSC) was 118°C. The new synthetic method makes the synthesis of starch vernolates less time consuming and more inexpensive. The differences in melting point and degree of substitution with previously synthesized starch vernolates using enzymatic and chemical catalysis suggest a difference in reaction selectivity via this new reaction path.
Keywords
Vernonia Oil Methyl Ester, Cassava Starch, Starch Vernolates
To cite this article
Tegene Desalegn Zeleke, Teshome Abdo Segne, Yonas Chebude, Synthesis and Characterization of Starch Vernolates in Organic Solvents, American Journal of Applied Chemistry. Vol. 4, No. 6, 2016, pp. 212-220. doi: 10.11648/j.ajac.20160406.11
Copyright
Copyright © 2016 Authors retain the copyright of this article.
This article is an open access article distributed under the Creative Commons Attribution License (http://creativecommons.org/licenses/by/4.0/) which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
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