1. Dispersion of titanium dioxide pigments by alkyl polyglycoside surfactants in aqueous solution
- Author
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Merlin D. Grieser, Mike C. Counts, George A. Smith, and Allison L. Zulli
- Subjects
chemistry.chemical_classification ,Aqueous solution ,Inorganic chemistry ,technology, industry, and agriculture ,Alkyl polyglycoside ,Dispersant ,chemistry.chemical_compound ,Colloid and Surface Chemistry ,chemistry ,Pulmonary surfactant ,Zeta potential ,Particle ,Dispersion (chemistry) ,Alkyl - Abstract
The interaction of APG® surfactants with TiO 2 Pigments has been characterized by a variety of different experimental techniques. Rheological measurements have been used to determine the viscosity of concentrated TiO 2 pigment slurries as a function of surfactant concentration. Adsorption experiments have been used to understand how APG® surfactants interact with the surface of the pigment on a molecular level. In addition, zeta potential measurements were performed to determine how APG® surfactants affect the electrostatic potential at the TiO 2 particle surface. Taken together, the experimental results indicate that APG® surfactants are effective dispersants for TiO 2 particles in aqueous solution. In general, the effectiveness increases with increasing alkyl chain length. APG® surfactant molecules adsorb on the particle surface by hemimicelle formation. The zeta potential of the dispersed particles shows a complex behavior as a function of adsorbed surfactant concentration.
- Published
- 1994
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