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Entropy and droplet size distributions of Winsor I and II microemulsions
YKI – Ytkemiska institutet.
2001 (English)In: Colloids and Surfaces A: Physicochemical and Engineering Aspects, ISSN 0927-7757, E-ISSN 1873-4359, Vol. 183-185, 347-360 p.Article in journal (Refereed)
Abstract [en]

A review is presented of some general notions underlying the current theory of Winsor I and II microemulsions where the exposition is based on a comparison between the droplet kind of approach with the corresponding multiple equilibrium treatment. We show that the droplet size distributions derived earlier, although put in different mathematical forms in the respective treatments, are in effect the same, of the type where the preexponential factor, S(R), is due to the fluctuations in size and shape of the droplets, and the droplet surface tension, s, is curvature-dependent in accordance with the Helfrich expression. Full consistency is demonstrated among the two approaches, at least insofar as surfactant density fluctuations are not explicity taken into account. Moreover, on the basis of the multiple equilibrium model we can actually estimate the length scale parameter l introduced earlier in the droplet kind of treatment to fully account for the entropy of dispersion, to be about 1 nm, in fair agreement with previous estimates

Place, publisher, year, edition, pages
2001. Vol. 183-185, 347-360 p.
Keyword [en]
Curvature free energy of microemulsion droplets, entropy of dispersion of microemulsions Fluctuations, in size and shape of microemulsions Multiple equilibrium description, of Winsor I and II microemulsions Size distribution, of microemulsion droplets
National Category
Natural Sciences
Identifiers
URN: urn:nbn:se:ri:diva-26437OAI: oai:DiVA.org:ri-26437DiVA: diva2:1053439
Note
A1419Available from: 2016-12-08 Created: 2016-12-08Bibliographically approved

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