Optimasi Sintesis Biosurfaktan Lauril Amida dari Asam Laurat dan Dietanolamina Menggunakan Enzim Lipase Terimobilisasi
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Institusion
Universitas Sumatera Utara
Author
Silaen, Denny Samuel
Subject
Amidasi
Datestamp
2018-12-17 08:07:46
Abstract :
Lauril amide is one of nonionic surfactant and has potency to become an ecofriendly surfactant. The main problem on lauril amide synthesis is the low conversion of lauric acid. Optimation of lauril amide synthesis was done with three variabels which give influence. One stage amidation was done by reacting lauric acid with diethanolamine using catalyst Novozyme 435® with substrate ratio lauric acid:diethanolamine 1:1, 2:1, 3:1, 4:1,5:1, amount of catalyst 1,8, 4, 7, 10, 11,8% from lauric acid total amount, solvent ratio 0, 1:1, 2:1, 3:1, 4:1 from lauric acid total amount and reacted for 24 hours with temperature reaction 55oC and 500 rpm. Product separated from catalyst using filtration method and then purified by wash with acetone and heated with temperature 90oC to remove solvent. Product has been analyzed with acid value to obtained percent conversion of lauril amide, determine of Hydrophilic Liphophilic Balance value, spectroscopy Fourier Transform Infrared (FT-IR) and determine of critical micelle concentrasion. Percent conversion optimum has obtained 86,16% at condition substrate ratio 1:1, enzyme concentration Novozyme 435® 7% and solvent ratio 2:1. From analyze result of lauril amide surfactant, HLB value has obtained 11,93, this showed that lauril amide surfactant can use as emultion oil in water.
Lauril amide is one of nonionic surfactant and has potency to become an ecofriendly surfactant. The main problem on lauril amide synthesis is the low conversion of lauric acid. Optimation of lauril amide synthesis was done with three variabels which give influence. One stage amidation was done by reacting lauric acid with diethanolamine using catalyst Novozyme 435® with substrate ratio lauric acid:diethanolamine 1:1, 2:1, 3:1, 4:1,5:1, amount of catalyst 1,8, 4, 7, 10, 11,8% from lauric acid total amount, solvent ratio 0, 1:1, 2:1, 3:1, 4:1 from lauric acid total amount and reacted for 24 hours with temperature reaction 55oC and 500 rpm. Product separated from catalyst using filtration method and then purified by wash with acetone and heated with temperature 90oC to remove solvent. Product has been analyzed with acid value to obtained percent conversion of lauril amide, determine of Hydrophilic Liphophilic Balance value, spectroscopy Fourier Transform Infrared (FT-IR) and determine of critical micelle concentrasion. Percent conversion optimum has obtained 86,16% at condition substrate ratio 1:1, enzyme concentration Novozyme 435® 7% and solvent ratio 2:1. From analyze result of lauril amide surfactant, HLB value has obtained 11,93, this showed that lauril amide surfactant can use as emultion oil in water.
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