Adsorption of Dispersions of Silica Nanoparticles and anAmphiphilic Triblock Copolymer at Water‐Vapor Interface

This study is about the surface modification of hydrophilic silica nanoparticles by
non-chemical adsorption of an amphiphilic triblock copolymer (Pluronic F-127)
and its influence on surface tension and interfacial rheology. As copolymer
concentration increases, we observed an increment of the hydrodynamic diameter
and a reduction of the effective charge of the complexes. The presence of silica, at
low Pluronic F-127 concentration, increases surface tension and affects the
rheology: those results suggest that silica particles hinder Pluronic F-127
molecules reorganization at the interface, with subsequent increase in foam