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<p>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.<br>
Video 1: Pickering emulsions of tetradecane droplets in cationic surfactant (CTAC) solution at 15 °C.<br>
Video 2: Pickering emulsions of tetradecane droplets in cationic surfactant (CTAC) solution upon cooling at 6 °C. </p>
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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