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Effect of Ultrasonic Treatment on Stability of TiO2 Aqueous Dispersions in Presence of Water-Soluble Polymers
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| Author:
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M.O.KAPTAKOV
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| Abstract:
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The stability of aqueous dispersions of a rutile titanium dioxide particles (TiO2) under ultrasonic treatment in presence of three water-soluble polymers: polyvinilpyrrolidone, polyvinyl alcohol, ethylhydroxyethylcellulose was studied. Without polymers, the US-treatment of the dilute TiO2 aqueous dispersions results in rapid complete coagulation of the dispersion. In presence of the polymers, a stabilizing effect which depends on the nature of polymers, their concentration and the duration of the US-treatment was observed. Experiments showed that US-treatment of TiO2 dispersions results in reduction of particle size and in the narrower particle size distribution. The particles with preliminary treatment of TiO2 surface by Al, Si, Zr oxides show the higher dispersion stability as compared with non-treated ones.
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| Keyword:
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The stability of aqueous dispersions of a rutile titanium dioxide particles (TiO2) under ultrasonic treatment in presence of three water-soluble polymers: polyvinilpyrrolidone, polyvinyl alcohol, ethylhydroxyethylcellulose was studied. Without polymers, the US-treatment of the dilute TiO2 aqueous dispersions results in rapid complete coagulation of the dispersion. In presence of the polymers, a stabilizing effect which depends on the nature of polymers, their concentration and the duration of the US-treatment was observed. Experiments showed that US-treatment of TiO2 dispersions results in reduction of particle size and in the narrower particle size distribution. The particles with preliminary treatment of TiO2 surface by Al, Si, Zr oxides show the higher dispersion stability as compared with non-treated ones.
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| EOI:
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-
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| DOI:
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https://doi.org/10.31838/ijpr/2020.SP2.302
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| Download:
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