ABSTRACT

The special wetting, spreading, and solution properties of selected organosilicone surfactants have been investigated using such techniques as dynamic and static surface tension, wetting, spreading, adsorption, and turbidity measurement. It is shown that even fluorocarbon surfactants, which reduce the surface tension of water to values lower than that achievable by organosilicone surfactants, do not wet or spread on hydrophobic surfaces efficiently. The special wetting properties of organosilicone surfactants are attributed to their unique structure, ability to lower the liquid-air surface tension to low values, fast kinetics of adsorption at interfaces, high affinity of the surfactant for hydrophobic surfaces, and the favorable orientation and structure of the adsorbed molecules.