Effect of the Interfacial Tension on the Stability of Silica Stabilized Pickering Emulsions near the Lower Critical Solution Temperature of 2,6-Lutidine - Water Mixtures

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  • Matsubara Hiroki
    Graduate School of Advanced Science and Engineering, Hiroshima University
  • Doi Junya
    Graduate School of Advanced Science and Engineering, Hiroshima University

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<p>In this paper, the kinetic stability of Pickering emulsions stabilized by spherical silica particles (100 nm in diameter) was examined in the water - 2,6-lutidine mixture. In the close vicinity of the lower critical solution temperature, Pickering emulsions were unstable due to the ultra-low liquid-liquid interfacial tension but increased their stability with increasing the temperature. In this system, the interfacial tension obeys universal scale law and can be tuned by temperature without adding any surface-active agents. Owing to this unique feature, we elucidated the relation between the interfacial tension and the stability of Pickering emulsions.</p>

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