Correlation between colloidal stability and surfactant adsorption/association phenomena studied by light scattering

Article Abstract:

The stability of colloidal-surfactant mixture in terms of Fuchs stability ratio, W and surfactant adsorption is studied using small-angle light scattering technique. The adsorption of surfactant influences the stability of the dispersion at a lower surfactant concentration than saturation point and at higher concentrations, the formation of surfactant micelles results in depletion-induced destabilization effects.

Micelles, Light scattering

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Predicting the phase diagram of two-dimensional colloidal systems with long-range interactions

Article Abstract:

Monte Carlo computer simulations in the isothermic-isobaric ensemble were used to determine the phase diagram of a two-dimensional model system for colloidal particle at the air-water interface. The analysis of isotherms, translational and orientational correlation functions as well as structure factor provide evidence of the existence of a melting first-order transition.

Usage, Water, Monte Carlo method, Monte Carlo methods

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Hydrophobic interactions in concentrated colloidal suspensions: a rheological investigation

Article Abstract:

Rheological investigations are presented to determine the influence of hydrophobicity interactions in concentrated colloidal suspensions. The resulting viscoelasticity of the suspensions is also examined.

Viscoelasticity, Hydrophobic effect

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