Synthesis and Colloidal-Chemical Properties of Surfactants Based on Alkyl Amines and Propylene Oxide

Abstract

AbstractOctyl amine, nonyl amine, dodecyl amine, hexadecyl amine and octadecyl amine are propoxylated with propylene oxide at mole ratios 1 : 1 and 1 : 2. The structure of the synthesized compounds has been identified by IR-and NMR-spectroscopy methods. Colloidal-chemical indices of these compounds have also been determined and their surface-active parameters have been measured, including the critical micelle concentration (CMC), the effectiveness of surface tension reduction (πCMC), the surface excess concentration (Γmax), area per molecule at the interface (Amin), the changes of Gibbs free energies of adsorption (ΔGad) and micellization (ΔGmic). Petroleum-collecting and petroleum-dispersing capacities of the synthesized compounds on the surface of water of varying mineralization degree have been studied.