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Dielectric properties of emulsions

I. Dielectric constants of O/W emulsions

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Summary

Dielectric constants of O/W emulsions were measured over a wide range of concentration and at frequencies ranging from 20 cps. to 3 mc.

No dielectric dispersion due to the interfacial polarization was observed in the experimental range of frequency, while the electrode polarization was observed below 100 kc.

Experimental results were compared with theoretical values for spherical dispersions. It was concluded that the dielectric constants of O/W emulsions were expressed best byBruggeman's equation over the whole range of concentration.

Zusammenfassung

Die DK von öl/Wasser-Emulsionen wurden über einen weiten Konzentrationsbereich und für Frequenzen zwischen 20 Hz und 3 MHz gemessen. Es war keine dielektrische Dispersion verursacht durch OberflÄchenpolarisation innerhalb des experimentellen Frequenzbereiches zu beobachten. Dagegen wurde unterhalb 100 kHz Elektrodenpolarisation bemerkbar.

Die experimentellen Ergebnisse wurden mit den theoretischen Darstellungen der Misch-DK für Dispersionen mit kugligen Teilchen verglichen. Der Verlauf der DK der öl/Wasser-Emulsion wird am besten und über den ganzen Konzentrationsbereich durch die Gleichung vonBruggeman dargestellt.

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Authors and Affiliations

  1. Institute for Chemical Research, Kyoto University, Takatsuki, Osaka, Japan

    Tetsuya Hanai, Naokazu Koizumi & Rempei Gotoh

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  1. Tetsuya Hanai
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  2. Naokazu Koizumi
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  3. Rempei Gotoh
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Hanai, T., Koizumi, N. & Gotoh, R. Dielectric properties of emulsions. Kolloid-Zeitschrift 167, 41–43 (1959). https://doi.org/10.1007/BF01810121

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