Very slow surfactant adsorption at the solid-liquid interface is due to long lived surface aggregates
Until recently it was believed that surfactant adsorption was completed very rapidly, but now it is understood that following the initial rapid adsorption of surfactant a much slower adsorption process can continue for many hours. Adsorption isotherms for cetyltrimethylammonium bromide (CTAB) on silica have been measured using optical reflectometry (OR) in the absence and presence of 1 mM and 10 mM KBr. Adsorption from bulk concentrations ranging from 0.3 to 1 × cmc showed evidence of slow...[Show more]
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