Adsorption Isotherms at a Silica/Water Interface of the Oligomers of Polydispersed Nonionic Surfactants of the Alkylpolyoxyethylated Series

摘要: Abstract Adsorption isotherms of the oligomers three commercial alkylethoxylated nonionic surfactants at a silica/water interface have been determined using HPLC method. The investigated are type used in detergency. compounds, here noted A, B, and C, were mixtures surfactants. A B general formulas C 13 E 7 + 15 10 , respectively. Compound was mixture ranging from 12 to 16 various proportions. About presented for most important each these detergents. could be more thoroughly discussed than compounds because adsorption data pure surfactant same series with even numbers carbon atoms alkyl chain made available. Thus, behavior representative compared that interface. It is shown low surface coverage, polydispersity effects either chains or ethoxy groups on global negligible behave essentially as pure, single At higher simultaneous presence long lengths small does not favor formation large structures, disks, patched bilayers silica do However, it demonstrated opposing cancel out isotherms. So may concluded case present investigation affect any great extent such consequences findings can extended other series.