FUNDAMENTAL INTERFACIAL PROPERTIES OF ALKYL-BRANCHED SULFATE AND ETHOXY SULFATE SURFACTANTS DERIVED FROM GUERBET ALCOHOLS .2. DYNAMIC SURFACE-TENSION

A variety of Guerbet sulfate and monodisperse ethoxy sulfate surfactants were synthesized and dynamic surface tension properties determined at the air-water interface to understand how hydrocarbon chain branching influences the dynamics of surface tension reduction. Comparison of the dynamic surface tension properties of C-16 linear surfactants with C-16 Guerbet surfactants revealed that hydrocarbon chain branching causes a significant increase in the rate of surface tension reduction at the air-water interface. Further, since Guerbet surfactants reach meso equilibrium faster and the values of surface tension at meso equilibrium are much lower than their linear counterparts, they exhibit higher dynamic effectiveness.