Demulsification of dilute O/W emulsion by DC electric field |
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Authors: | Jingyuan Zhang |
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Affiliation: | School of Chemical Engineering and Technology, Tianjin University, Tianjin, China |
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Abstract: | In this article, the effect of demulsification of dilute O/W emulsion in DC electric field and its mechanism are investigated. The results show that the demulsification process of dilute O/W emulsion is divided into three stages: water layer formation, re-emulsification with transverse diffusion and uplift-stabilization of O/W emulsion. There is a critical current in the electro-demulsification of dilute O/W emulsion. Some evidences confirm that O/W emulsion system with surfactant produces a surface tension gradient in the height direction during the stratification process. The critical current together with the surface tension gradient causes different demulsification processes and current variation for different emulsions. |
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Keywords: | O/W emulsion demulsification DC electric field liquid droplets |
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