Effect of carbon chain length on the properties of gemini surfactants based on ethane-1,2-diamine and fatty acids
Year: 2026
Type: article
Abstract: The present study investigates the effect of carbon chain length on the properties of Gemini-type surfactants synthesized from the reaction of ethane-1,2-diamine with dodecanoic, tridecanoic and tetradecanoic acid.Using Infrared spectroscopy, the structure and composition of the reaction products were confirmed.Using the surface tension results, the critical micelle concentration, critical surface tension and other surface activity parameters were determined for both gemini and mono-structured compounds and the results were analyzed comparatively.The results showed that increasing the carbon chain length leads to a decrease in the critical micelle concentration value for gemini compounds and at the same time, an increase in the critical surface tension.For mono-type surfactants, the change was observed only in the surface tension value, which was also reflected in the dimeric surfactants.In order to check the tendency of micellization and adsorption of the surfactants Gibbs free energy of micellization (ΔG mic ) and Gibbs free energy of adsorption (ΔG ads ) were identified by measuring the electrical conductivity of the aqueous solution of the compounds at room temperature.It was found that, all three compounds have a more tendency to be adsorbed on the medium rather than to create micellization.The Gibbs free energy of adsorption (ΔG ads ) becomes more negative with increase in the molar mass of the obtained products.Furthermore, the petrocollecting and petrodispersing properties of the surfactants were measured in the three water samples differentiated by salinity and mineralization content in order to investigate the probability of implementation in oil spill removal
Source: PPOR
Language: English
Subfield: Physical and Theoretical Chemistry
Field: Chemistry
Domain: Physical Sciences
Open Access status: bronze
OpenAlex ID: W7214484101