SYNTHESIS AND PROPERTIES OF DISSYMMETRIC COCOGEM SURFACTANTS WITH DIFFERENT ALKYL CHAIN LENGTHS

N,N'-bis(2-hydroxypropyl)ethylenediamine was obtained by the interaction of propylene oxide with ethylenediamine. Based on the obtained product and fatty acids (caprylic acid, capric acid, lauric acid, myristic acid, palmitic acid, stearic acid, oleic acid), dissymmetric surfactants were synthesized. The composition and structures of the obtained substances were confirmed by various modern physicochemical methods, including IR, H-1 NMR and C-13 NMR spectroscopy. Krafft temperatures were determined for these dissymmetric cocogem surfactants. Critical micelle concentration, effectiveness of surface tension reduction, surface excess concentration, area per molecule at the interface, values of Gibbs free energy of micelle formation and adsorption processes were calculated by determining the surface tension using the tensiometric method. The degree of counter-ion binding was studied by determining the specific electrical conductivity using conductometric method. The sizes of the aggregates formed by the synthesized surfactants in aqueous solutions were determined by the Dynamic Light Scattering method. Structure-property dependencies were studied by changing the length of one of the alkyl groups attached to the polar group in the molecules of various alkyl chain dissymmetric cocogem surfactants based on N,N'-bis(2-hydroxypropyl)ethylenediamine and C8-C18 higher monocarboxylic acids, and more effective bactericidal surfactants against sulfate reducing bacteria were determined