Authors Dutschk, V. ; Breitzke, B. ; Grundke, K.
Title Wetting of Aqueous Surfactant Solutions on Polymer Surfaces
Date 04.12.2003
Number 11594
Abstract The wetting behavior of aqueous surfactant solutions on polymer surfaces of different hydrophobicity/hydrophilicity (in terms of surface energy) was systematically investigated. Surfactants with different ionogeneity (sodium dodecyl sulfate, dodecyltrimethylammonium bromide and pentaethylene glycol monododecyl ether) were used in this study. Static and dynamic contact angles of these aqueous surfactant solutions were measured in the pre- and micellar concentration range on five different polymer surfaces (Teflon AF, Parafilm polypropylene, polyvinylfluorid, polyethyleneterephthalate). An important parameter to estimate the wetting behavior of surfactant solutions is the wetting activity (wetting power), -(d·/dc)[c·O], calculated from the derivative of the equilibrium contact angle with respect to concentration which is a measure comparable with the surface activity of the surfactants at the liquid-vapor interface, -(ds/dc)[c·O]. From the study of the wetting kinetics, we found that the time dependence of the drop base radius can be fitted by a power function. For dilute surfactant solutions, very small exponent values of this power function (0.01-0.08) were calculated, which do not correspond to known models from the literature.
Publisher Tenside Surfactants Detergents
Citation Tenside Surfactants Detergents 40 (2003) 250-255

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