DOI: https://doi.org/10.55373/mjchem.v26i3.19

Keywords: Surfactant; ketapang seed oil; herbicide; alkyldiethanolamide; surface tension

Abstract

Alkyldiethanolamide (ADEA) is a group of non-ionic surfactants that can be obtained from the amidation process, potentially reducing the surface tension of commercial herbicides and thereby increasing their effectiveness. The purpose of this research is to characterize ADEA surfactants produced from the synthesis of triglycerides based on ketapang (Terminalia catappa) seed oil with Lipozyme TL IM catalyst and the effect of adding surfactant with concentration 1-9% in herbicide formulations with the active ingredient isopropylamine glyphosate. The characteristics of the ADEA produced are an acid value of 72.62 mg KOH/g, a saponification value of 106.59 mg KOH/g, an HLB value of 5.68, a pH of 6.2, a density of 0.94 g/mL, and viscosity of 6.33 Cp. The effect of adding a surfactant concentration of 5% was the best formulation, which was able to reduce the surface tension of commercial herbicides from 22.03 dyne/cm to 14.66 dyne/cm.