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Title: Evaluation of ethanolamide based nonionic biosurfactant materials from chemically modified castor oil and used palm oil waste
Authors: Wahyuningsih, Tutik Dwi
Kurniawan, Yehezkiel Steven
Ceristrisani, Normah
Suryanti, Aditia Diyah
Keywords: Castor oil;Ethanolamide;Nonionic Biosurfactant;Oil waste;Used palm oil
Issue Date: Jul-2020
Publisher: NISCAIR-CSIR, India
Abstract: Successful preparation of the ethanolamide based nonionic biosurfactant materials from castor oil and used palm oil waste through a chemical modification process has been reported. Both oil wastes have been transesterified with methanol under the alkaline condition to yield 93.32 and 80.30% of methyl esters. The ricinoleic acid and 9,10,12-trihydroxystearic acid compounds are obtained in 93.44 and 94.86% yield; while the amidation of the methyl esters in a solvent-free reaction gives ricinoleyl ethanolamide in 49.81% yield, and biomaterials containing lauryl ethanolamide, myristyl ethanolamide, palmityl ethanolamide, and oleoyl ethanolamide derivatives yielded in 74.48%. The chemical structures of the products have been confirmed by FTIR, GC-MS, and 1H-NMR spectrometers. Almost all biosurfactant materials gave higher HLB and lower surface tension compared with the Tween 80 as a positive control. Even though only ricinoleic acid and ethanolamide derivatives exhibit lower critical micelle concentration than the positive control, the ethanolamide derivatives from used palm oil give a stable foam volume up to 70 mL for 90 min and also give a stable emulsion between distilled water and gasoline to 5 days, which is remarkable. These findings show that the ethanolamide derivatives from castor oil and used palm oil waste are promising nonionic biosurfactant materials for industrial applications.
Page(s): 326-332
ISSN: 0975-0991 (Online); 0971-457X (Print)
Appears in Collections:IJCT Vol.27(4) [July 2020]

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