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Chemical Modification of Sago Starch by Solventless Esterification with Fatty Acid Chlorides

Dzulkefly K., and See, Yaw Koon, and Anuar Kassim, and Atan Sharif, and Abd Halim Abdullah, (2007) Chemical Modification of Sago Starch by Solventless Esterification with Fatty Acid Chlorides. Malaysian Journal of Analytical Sciences, 11 (2). pp. 395-399. ISSN 13942506

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Official URL: http://pkukmweb.ukm.my/~mjas/v11_n2/Dzul%20UPM.pdf

Affiliations

Universiti Putra Malaysia, Dept. of Chemistry
Universiti Putra Malaysia, Dept. of Chemistry
Universiti Putra Malaysia, Dept. of Chemistry
Universiti Putra Malaysia, Dept. of Chemistry
Universiti Putra Malaysia, Dept. of Chemistry

Abstract

Sago starch was chemically modified by esterification reaction with fatty acid chlorides to produce a non-polar sago ester in the absence of an organic solvent. The sago esters were prepared by first pretreatment of sago starch with excess formic acid at 90oC for 40 minutes followed by acetylation with acid chloride (octanoyl and lauroyl chlorides). The maximum yields of 80% and 73% with the same degree of substitution (DS) of 1.2 for octanoate and lauroate sago esters were obtained respectively. The presence of ester carbonyl group in the FT-IR spectra of the ester products showed that the sago starch has been esterified. The intensities of carbonyl and methyl peaks were decreased with the increasing of DS.

Item Type:Journal
Keywords:Sago Starch, Esterification, Degree of Substitution, Solventless Method, Modification
Subjects:Q Science, Computer Science
ID Code:5230

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