Water-Insoluble Surface Coatings of Polyion−Surfactant Ion Complex Salts Respond to Additives in a Surrounding Aqueous Solution
Hydrated, but water-insoluble, “complex salts” (CS) composed of alkyltrimethylammonium surfactant ions with polyacrylate counterions are known to exhibit a rich phase behavior in bulk mixtures with water and have recently been shown to act as water-responsive surface coatings. Here it is shown, by SAXS measurements, that surface coatings of CS also respond to various added solutes in a surrounding