The Emulsifying Properties of Compositions Based on Stearic Acid and Sodium Carboxymethyl Cellulose Synthesized at the Interface of Vaseline Oil/Water Solution of KOH

K. Musabekov; O. Yessimova; A. Yertayeva; A. Adilbekova; M. Kerimkulova

doi:10.18321/ectj1672

Authors

K. Musabekov Al-Farabi Kazakh National University, 71 Al-Farabi ave., Almaty, Kazakhstan
O. Yessimova Al-Farabi Kazakh National University, 71 Al-Farabi ave., Almaty, Kazakhstan
A. Yertayeva Al-Farabi Kazakh National University, 71 Al-Farabi ave., Almaty, Kazakhstan
A. Adilbekova Al-Farabi Kazakh National University, 71 Al-Farabi ave., Almaty, Kazakhstan
M. Kerimkulova Al-Farabi Kazakh National University, 71 Al-Farabi ave., Almaty, Kazakhstan

DOI:

https://doi.org/10.18321/ectj1672

Keywords:

Stearic acid, Sodium carboxymethyl cellulose, Vaseline oil, Emulsions, Surfactant-polymer composite, Oil/water interface

Abstract

Emulsifiers of natural origin play an important role in producing stable emulsions for applications in food, pharmaceuticals, cosmetics, and other industries. In this work, the emulsifying properties of a new composite based on stearic acid, its salt (potassium salt of stearic acid) forming at the water/vaseline oil and polymer sodium carboxymethyl cellulose (Na-CMC) were investigated. Potassium stearate was formed directly at the interface of water and vaseline oil: a solution of stearic acid in vaseline oil was used as the oil phase, and a solution of potassium hydroxide in water was used as the polar phase. It was shown that at a 1% concentration of stearic acid, high stability was achieved for a 50% emulsion. The stability of the emulsion increased with the concentration of both the surfactant and Na-CMC. The effect of the composite emulsifier on the stability of the emulsion is associated with the interaction of its components and the formation of a mixed interfacial adsorption layer. It was found that the lifetime of the vaseline oil-in-water emulsion at the optimal concentrations of 1% potassium stearate and 0.25% Na-CMC exceeded three days. The results of this study contribute to understanding the formation of emulsions where a surface-active emulsifier is formed directly at the oil/water interface and stabilization occurs through the participation of polymers.

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