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.
| Published in | American Journal of Applied Chemistry (Volume 4, Issue 6) |
| DOI | 10.11648/j.ajac.20160406.11 |
| Page(s) | 212-220 |
| Creative Commons |
This is an Open Access article, distributed under the terms of the Creative Commons Attribution 4.0 International License (http://creativecommons.org/licenses/by/4.0/), which permits unrestricted use, distribution and reproduction in any medium or format, provided the original work is properly cited. |
| Copyright |
Copyright © The Author(s), 2016. Published by Science Publishing Group |
Vernonia Oil Methyl Ester, Cassava Starch, Starch Vernolates
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APA Style
Tegene Desalegn Zeleke, Teshome Abdo Segne, Yonas Chebude. (2016). Synthesis and Characterization of Starch Vernolates in Organic Solvents. American Journal of Applied Chemistry, 4(6), 212-220. https://doi.org/10.11648/j.ajac.20160406.11
ACS Style
Tegene Desalegn Zeleke; Teshome Abdo Segne; Yonas Chebude. Synthesis and Characterization of Starch Vernolates in Organic Solvents. Am. J. Appl. Chem. 2016, 4(6), 212-220. doi: 10.11648/j.ajac.20160406.11
AMA Style
Tegene Desalegn Zeleke, Teshome Abdo Segne, Yonas Chebude. Synthesis and Characterization of Starch Vernolates in Organic Solvents. Am J Appl Chem. 2016;4(6):212-220. doi: 10.11648/j.ajac.20160406.11
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Download@article{10.11648/j.ajac.20160406.11,
author = {Tegene Desalegn Zeleke and Teshome Abdo Segne and Yonas Chebude},
title = {Synthesis and Characterization of Starch Vernolates in Organic Solvents},
journal = {American Journal of Applied Chemistry},
volume = {4},
number = {6},
pages = {212-220},
doi = {10.11648/j.ajac.20160406.11},
url = {https://doi.org/10.11648/j.ajac.20160406.11},
eprint = {https://article.sciencepublishinggroup.com/pdf/10.11648.j.ajac.20160406.11},
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.},
year = {2016}
}
TY - JOUR T1 - Synthesis and Characterization of Starch Vernolates in Organic Solvents AU - Tegene Desalegn Zeleke AU - Teshome Abdo Segne AU - Yonas Chebude Y1 - 2016/12/17 PY - 2016 N1 - https://doi.org/10.11648/j.ajac.20160406.11 DO - 10.11648/j.ajac.20160406.11 T2 - American Journal of Applied Chemistry JF - American Journal of Applied Chemistry JO - American Journal of Applied Chemistry SP - 212 EP - 220 PB - Science Publishing Group SN - 2330-8745 UR - https://doi.org/10.11648/j.ajac.20160406.11 AB - 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. VL - 4 IS - 6 ER -
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