DESTRIBATS, Mathieu; GINESTE, Stéphane; LAURICHESSE, Eric; TANNER, Hugo; LEAL-CALDERON, Fernando; HÉROGUEZ, Valérie; SCHMITT, Veronique

doi:10.1021/la501299u

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DESTRIBATS, Mathieu
Centre de recherches Paul Pascal [CRPP]

GINESTE, Stéphane
Centre de recherches Paul Pascal [CRPP]

LAURICHESSE, Eric
Centre de recherches Paul Pascal [CRPP]

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Langmuir. 2014, vol. 30, n° 31, p. pp. 9313-9326

American Chemical Society

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We synthesized surface-active lipophilic core−hydrophilic shell latex particles, and we probed their efficiency as emulsion stabilizers. The relative weight percentage of the shell, RS/P, was varied to trigger the balance between lipophilicity and hydrophilicity of the particles. Particle wettability could concomitantly be tuned by the pH of the aqueous phase determining the surface charge. Emulsions covering a wide range of RS/P and pH values were fabricated, and their type, oil-inwater (O/W) or water-in-oil (W/O), and kinetic stability weresystematically assessed. By adapting the particle gel trapping technique to pH-variable systems and by exploiting the limited coalescence process, we were able to determine the proportion of oil/water interfacial area, C, covered by the particles as well as their contact angle, θ. All of these data were gathered into a single generic diagram showing good correlation between the emulsion type and the particle contact angle (O/W for θ < 90° and W/O for θ > 90°) in agreement with the empirical Finkle rule.....< Réduire

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Interfacial Properties

Pickering Emulsions

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Pickering Emulsions: What Are the Main Parameters Determining the Emulsion Type and Interfacial Properties?

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