Linear viscoelasticity of emulsions : I. The effect of an interfacial film on the dynamic viscosity of nondilute emulsions

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Oosterbroek, M. and Mellema, J. (1981) Linear viscoelasticity of emulsions : I. The effect of an interfacial film on the dynamic viscosity of nondilute emulsions. Journal of Colloid and Interface Science, 84 (1-5). pp. 14-26. ISSN 0021-9797

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Abstract:The dynamic viscosity of nondilute monodisperse emulsions is calculated by using a cell model. Two possibilities for describing the mechanical properties of the interfacial film between the internal and the external phase are considered: (A) the film is assigned a two-dimensional linear viscoelastic behavior and (B) the film is treated as a shell with finite thickness containing a Newtonian liquid. The resulting expressions for the dynamic viscosity show that model B has two relaxation times and model A has at least two or more. If a Voigt-Kelvin model is used to describe the interfacial rheology, model A will also have just two relaxation times. The results obtained may be used to interpret measurements on emulsions in terms of microscopic parameters of these emulsions.
Item Type:Article
Copyright:© 1981 Elsevier Science
Link to this item:http://purl.utwente.nl/publications/68894
Official URL:http://dx.doi.org/10.1016/0021-9797(81)90254-X
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