Formation of the surface charge on silica in mixed solvents |
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| Authors: | Dr. Marek Kosmulski Dr. Egon Matijević |
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| Affiliation: | (1) Present address: Center for Advanced Materials Processing, Clarkson University, 13699-5814 Potsdam, New York, USA;(2) Present address: Laboratory of Adsorption and Physical Chemistry of Surfaces, Polish Academy of Sciences, Lublin, Poland;(3) Institute of Chemistry Department of Radiochemistry, Maria Curie-Sklodowska University, pl. Marii Curie-Sklodowskiej 3, 20-031 Lublin, Poland;(4) Department of Chemistry, Clarkson University, Potsdam, New York, USA |
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| Abstract: | At sufficiently high concentrations of methanol and of alkali salts in aqueous silica dispersions, the negative  -potentials of the particles are decreased. This effect is more pronounced with lithium than with other alkali cations, and it is independent on the anion. The NMR spectra indicate lithium adsorption on silica from mixed solvents, but not in the absence of alcohol.Supported by a contract with the XMX Corporation, Burlington, Massachusetts, USA |
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| Keywords: | Mixed solvents NMR of silica silica surface charge zeta potential |
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