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Abstract

Introduction

This article proves that the microemulsion was prepared successfully with the addition of metal chlorides. And the metal chloride would affect the interfacial tension (IFT), salt concentrate required for phase transition and shear viscosity of different mixtures. Experiments have shown that much quantities metal chloride salts can be dissolved in microemulsions, so it is possible in theoretically to prepare mercury-free catalysts using the microemulsion method.

Methods

The oil-water IFT of the surfactant solution with metal chloride added was tested, the metal chloride concentration required for the phase transition of microemulsions was determined using salinity scanning, and the viscosity of each microemulsion was tested.

Results

The results indicated that the IFTs of nearly all microemulsions decreased, with values decreasing from 10–1 mN/m to 101 mN/m and a maximum reduction of 47.25 mN/m. The phase transitions observed were Winsor I → Winsor III → Winsor II. Metal chloride concentrations required for the Winsor I to Winsor III transition ranged from 0.5% to 5%, while the Winsor III to Winsor II transition required a concentration between 8% to 20%. Increasing metal chloride concentrations led to higher viscosity, with MnCl causing the largest increase (15.4 mPa·s) and CuCl the smallest.

Conclusion

The metal chloride concentration required for phase behavior transitions in microemulsions correlated with the effectiveness in reducing the oil-water IFT and increasing shear viscosity. Specifically, metal chlorides that necessitate lower concentrations for phase transitions led to a more significant reduction in IFT and lower shear viscosity in the microemulsion.

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2025-01-01
2025-12-20

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/content/journals/cms/10.2174/0126661454357702250205183017
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Effects of Metal Chlorides on the Formation of Microemulsions
, 149; https://doi.org/10.2174/0126661454357702250205183017
/content/journals/cms/10.2174/0126661454357702250205183017
/content/journals/cms/10.2174/0126661454357702250205183017
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  • Article Type:     Research Article
Keyword(s): interfacial tension; Metal chlorides; microemulsion; phase transition; salinity scanning; shear viscosity

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