The structure and adsorption properties of colloidal silica used in toothpastes |
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Authors: | V S Erasov A Z Galimova T S Solov’eva M Yu Pletnev |
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Affiliation: | 1585. Moscow State University of Fine Chemical Technologies, Moscow, Russia 2585. Splat-Kosmetika Limited Lability Company, Moscow, Russia
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Abstract: | The dispersity, specific surface area, porosity, and pore size distribution are determined for samples of colloidal silica and calcium o-phosphate, toothpaste constituents. The results obtained show that adsorbents have the developed mesoporous structure. It was found that the adsorption of sodium lauryl sulfate and a nonionic surfactant, glyceryl monocaprylate, at the aqueous surfactant solution-colloidal silica interface is small and has the unusual character. The reasons for a low adsorption of surfactants and their mixtures on the surface of the studied adsorbents are discussed. |
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