PHILOSOPHICAL ISSUES OF POVERTY: SOCIAL, ETHICAL, AND POLITICAL ASPECTS
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Jumayev Oybek Maratovich

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This work investigates the processes of adsorption and micelle formation in aqueous solutions of surfactants (SAS), which determine their technological properties. Through theoretical analysis based on a method proposed in the literature, the contribution of various functional groups to the change in Gibbs free energy of these processes was assessed. The results show that the change in free energy during micelle formation can be represented as the sum of changes in energy of the hydrophilic and hydrophobic components of the SAS molecules. A linear dependence between the change in free energy and the number of hydrocarbon groups was revealed, allowing the calculation of the energetic contribution of a single hydrocarbon group. The analysis showed no direct dependence between the number of hydrophilic groups and the change in free energy, indicating that only a certain portion of these groups integrate into the micelles. The study also emphasizes the difference in the technological properties of solutions when using anionic surfactants and offers a new understanding of the thermodynamic aspects of adsorption and micelle formation processes in aqueous solutions of molecular SAS.
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Authors
Jumayev Oybek Maratovich

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References:
Lin I.J., Marszall L. "Partition of HLB Coefficient and Effective Chain Length of Surface-Active Agents." Progress in Colloid and Polymer Science, vol. 63, 1978, pp. 99–104.
Maryaskin Y., Derman S. "Relation of Surface-Active Agents Solutions Surface and Volume Properties." European Science Review, vol. 1, no. 11-12, 2019, pp. 136–140.
Lin I.J. "The Hydrophile-Lipophile Balance (HLB) of Fluorocarbon Surfactants and Its Relation to the Critical Micelle Concentration (CMC)." The Journal of Physical Chemistry, vol. 76, no. 14, 1972, pp. 2019–2023.
Maryaskin, Y.B., Danilov, F.I. "The Relationship Between Colloidal-Chemical Properties and the Hydrophilic-Lipophilic Balance of Surface-Active Substances." Questions of Chemistry and Chemical Technology, no. 3, 2004, pp. 136–140.
Maslak, H.S., Maryaskin, Y.B., Derman, S. "Influence of Micellar Structures on the Adsorption Capacity of Surfactants." European Science Review, no. 9–10, 2023.
Israelachvili, J.N. "Intermolecular and Surface Forces." Academic Press, 2011.
Rosen, M.J., Kunjappu, J.T. "Surfactants and Interfacial Phenomena." Wiley, 2012.
Myers, D. "Surfactant Science and Technology." Wiley-VCH, 2005.
Volkov, V.A. "The Influence of Molecular Structure on Micelle Formation in Solutions of Surface-Active Substances." Colloid Journal, vol. XXXVII, no. 5, 1975, pp. 845–852.