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Demulsification of Silica Stabilized Pickering Emulsions upon Cooling in CTAC Solution

Version 2 2023-12-12, 05:48
Version 1 2023-11-30, 02:09
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posted on 2023-12-12, 05:48 authored by Kazuki Shishida, Hiroki Matsubara

We prepared Pickering emulsions of tetradecane droplets in   cationic surfactant (CTAC) solution at 15  °C, which is stable over time as shown in Video 1. However, spontaneous demulsification was   realized upon cooling at 6  °C (Video 2) due to the reversal of the oil-water interfacial   tension between silica laden interface and CTAC adsorbed film at this   temperature.
Video 1: Pickering emulsions of   tetradecane droplets in cationic surfactant (CTAC) solution at 15 °C.
Video 2: Pickering emulsions of   tetradecane droplets in cationic surfactant (CTAC) solution upon cooling at 6 °C.    

Funding

Physical property control of pickering emulsion by applying critical dissolution and wetting with a solvent of silica particles

Japan Society for the Promotion of Science

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KOSÉ Cosmetology Research Foundation

Hosokawa Powder Technology Foundation

History

Corresponding author email address

hmtbr@hiroshima-u.ac.jp

Copyright

© 2023 Japan Oil Chemists’ Society

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