Effect of 1-Pentanol on the Thermodynamics of the Micellization of Hexadecyltrimethylammonium Bromide in Aqueous Solutions
- Authors: Velikov A.A.1
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Affiliations:
- Institute of Petroleum Chemistry, Siberian Branch, Russian Academy of Sciences
- Issue: Vol 92, No 9 (2018)
- Pages: 1857-1859
- Section: Short Communications
- URL: https://journals.rcsi.science/0036-0244/article/view/170144
- DOI: https://doi.org/10.1134/S0036024418090327
- ID: 170144
Cite item
Abstract
The thermodynamic parameters (ΔH, ΔG, and ΔS) of the micellization of hexadecyltrimethylammonium bromide (CTAB) in aqueous solutions of 1-pentanol at 298.15 and 313.15 K are measured via micelle destruction. Critical micelle concentrations CMC 1 and CMC 2 at different concentrations of pentanol are determined. It is found that adding pentanol to a solution at 313.15 K does not affect the entropy of micelle formation, which is ΔS in pure water. A linear compensation relationship between the ΔH and ΔG values is revealed. It is shown that the entropy of a solution at 298.15 K falls upon adding pentanol, and the compensation relationship between the ΔH and ΔS values is in this case similar to the one obtained upon varying the temperature of a solution.
About the authors
A. A. Velikov
Institute of Petroleum Chemistry, Siberian Branch, Russian Academy of Sciences
Author for correspondence.
Email: vel2@ipc.tsc.ru
Russian Federation, Tomsk, 634021