Abstract
A THEORY that in an oil hydrosol the globules tend to reach a stable size, at which there is a balance between electrical and capillary forces, was advanced by Lewis1 and extended by Knapp2 for solid particles. For a particle surrounded by an electrical double layer, Knapp derived the equation where rc is the 'critical' radius at which the solubility of the particle is equal to that of a plane surface of the same material, e is the electric charge on the particle, δ the thickness of the double layer (assumed to be small compared with rc), ε the dielectric constant of the medium and γ the interfacial tension between particle and medium.
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References
Lewis, Koll. Z., 4, 211 (1909).
Knapp, Trans. Farad. Soc., 17, 457 (1922).
Lewis, Trans. Farad. Soc., 28, 597 (1932).
Summer, J. Phys. Chem., 37, 279 (especially pp. 295–98) (1933).
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SUMNER, C. Globule Size in Two-Phase Emulsions. Nature 164, 364–365 (1949). https://doi.org/10.1038/164364b0
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DOI: https://doi.org/10.1038/164364b0
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