Abstract
In this paper we describe the effect of 20 kHz power ultrasound on the encapsulation of titanium dioxide pigment with poly (methyl methacrylate) in an otherwise conventional emulsion-polymerisation process. In all instances, sonication of the reaction during the mixing period led to an improvement in the extent and uniformity of the coverage of the pigment. Low-power ultrasound produced a more uniform coverage than high-power ultrasound, but the latter provided greater particle dispersion.
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Lorimer, J.P., Mason, T.J., Kershaw, D. et al. Effect of ultrasound on the encapsulation of titanium dioxide pigment. Colloid Polym Sci 269, 392–397 (1991). https://doi.org/10.1007/BF00654585
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DOI: https://doi.org/10.1007/BF00654585