Surface behavior of hydrophilic silica nanoparticle-SDS surfactant solutions: I. Effect of nanoparticle concentration on foamability and foam stability (original) (raw)

This is a PDF file of an unedited manuscript that has been accepted for publication. As a service to our customers we are providing this early version of the manuscript. The manuscript will undergo copyediting, typesetting, and review of the resulting proof before it is published in its final form. Please note that during the production process errors may be discovered which could affect the content, and all legal disclaimers that apply to the journal pertain. Highlights  The results of tensiometry and foam experiments shed light on the surface behavior of SDS and its surface activity in the presence of hydrophilic silica nanoparticles.  The surface tension and the foam properties of SDS solutions are considerably improved with the addition of silica particles as if higher concentrations of SDS are used.  The surface adsorption and behavior of silica nanoparticles at the surface can be evaluated by applying high amplitude compressions/expansions of a drop surface.  The standard deviation of drop shape from its Laplacian form can be a very powerful tool to evaluate the closed-pack state of nanoparticles monolayer and its collapse at the drop surface.