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It is known that with alkane or toluene as oil, Pickering emulsions stabilized by unmodified CaCO 3 nanoparticles are of the oil-in-water (O/W) type. In contrast, when a triglyceride oil such as refined soybean oil or commercial olive oil is used, emulsions stabilized by the same particles are of the water-in-oil (W/O) type. However, if these natural oils are first columned through alumina,...
The surface physico-chemical properties of various kinds of surfactants (including cationic, anionic, nonionic and catanionic surfactants) in mixed ethanol-water solvents were investigated. In different surfactant systems, ethanol content influences the cmc and γ cmc differently. It is found that the varying tendency of γ cmc induced by ethanol addition can be predicted...
The physicochemical properties of an aqueous mixture of α-sulfolauric acid (H 2 LS) and its various salts, including sodium α-sulfolaurate (NaHLS), triethanolammonium α-sulfolaurate (TeAHLS) with a cationic surfactant, decyltrimethylammonium bromide (DeTAB), have been investigated. The surface activities of H 2 LS and its salts were enhanced greatly in the mixed systems; e.g. for...
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