| dc.description.abstract | Surfactants are used in various sectors because they can affect the surface
properties of a material. Fatty alcohol comes from vegetable oils such as palm oil
and coconut oil which serve as raw materials for various household products and
surfactants. In its manufacture, the use of Tert-amyl Alcohol has relatively high
hydrophilicity which will produce in a better reaction conversion compared to
ordinary solvents which will form a precipitate. The main problem in the
synthesis of surfactant N-acyl Arginine is the effect of temperature and reaction
time to produce the best percent conversion. The amidation process is carried out
by reacting tetradecanol and arginine in a ratio of 2:1, 3:1, 4:1 (w/w) with the
addition of tert-amyl alcohol then the solvent is added with sodium methoxide
(CH3NaO) catalyst with a weight percent of 3%, 5%, 7% to tetradecanol. The
reaction was carried out at a temperature of 60°C and a time of 5 hours. To get Nacyl
Arginine surfactant with the best conversion, a purification process was
carried out to separate the remaining catalyst and solvent. The purification process
was carried out by adding 5 ml of 10% citric acid then filtered with filter paper
and then heated at 90°C to evaporate the remaining solvent. The product will be
analyzed by determining the acid number to obtain the percent conversion of Nacyl
Arginine, determining the saponification number to determine the value of
Hydrophilic Liphophilic Balance, Fourier Transform Infrared (FT-IR)
spectroscopy. The optimum conversion percentage obtained was 90%, obtained
under conditions of 1:4 substrate ratio (T:A), 3% catalyst weight, 1:3 solvent ratio
(S:T) at a temperature of 60°C and a time of 5 hours. From the analysis results, the
surfactant N-acyl Arginine obtained has an acid number of 16,625, a
saponification number of 4,208, and an HLB (Hydropophile – Lipophile Balance)
value of 13,33 | en_US |
