Diethanolamide derivatives as a potential enhanced oil recovery agent from indonesian castor oil and used frying oil: isolation, synthesis, and evaluation as nonionic biosurfactants

Wahyuningsih, Tutik Dwi and Kurniawan, Yehezkiel Steven and Amalia, Suci and Wardhani, Titis A. K. and Muriningsih, C. E. S. (2019) Diethanolamide derivatives as a potential enhanced oil recovery agent from indonesian castor oil and used frying oil: isolation, synthesis, and evaluation as nonionic biosurfactants. Rasayan Journal Chemistry, 12 (2). pp. 741-748. ISSN ISSN: 0974-1496 | e-ISSN: 0976-0083 |

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Abstract

Mono-, di- and trihydroxy fatty acids were reacted in a free-solvent amidation reaction with diethanolamine to obtain the derivative of dialkanolamides.The ricinoleic acid and 9,10,12-trihydroxystearic acid were isolated and prepared from Indonesian castor oil, while 9,10-dihydroxystearic acid was synthesized from the used frying oil. Amidation reaction of methyl ricinoleate, 9,10-dihydroxystearic acid and 9,10,12-trihydroxystearic acid gave the dialkanolamide derivatives in 93.10, 49.66, and 38.78% yield, respectively. The chemical structure of the synthesized products was elucidated by FTIR and GC-MS through silylation method. The prepared compounds were evaluated for their physicochemical properties as nonionic biosurfactant such as Hydrophilic-Lyophilic Balance value, interfacial tension, critical micelle concentration, foam stability, emulsification index, and emulsion stability. It was found that more hydroxyl groups contribute to a higher Hydrophilic-Lyophilic Balance value, foam stability, emulsification index, and lower interfacial tension.

Item Type: Journal Article
Keywords: Diethanolamide; Biosurfactant; Castor Oil; Used Frying Oil; Free-Solvent Synthesis
Subjects: 03 CHEMICAL SCIENCES > 0305 Organic Chemistry > 030503 Organic Chemical Synthesis
Divisions: Faculty of Mathematics and Sciences > Department of Chemistry
Depositing User: Mrs Suci Amalia
Date Deposited: 24 Sep 2019 13:17

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