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Microemulsion Microstructure(s): A Tutorial Review
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DOI：10.3390/nano10091657.png)
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Abstract
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Microemulsions are thermodynamically stable, transparent, isotropic single-phase mixtures of two immiscible liquids stabilized by surfactants (and possibly other compounds). The assortment of very different microstructures behind such a univocal macroscopic definition is presented together with the experimental approaches to their determination. This tutorial review includes a necessary overview of the microemulsion phase behavior including the effect of temperature and salinity and of the features of living polymerlike micelles and living networks. Once these key learning points have been acquired, the different theoretical models proposed to rationalize the microemulsion microstructures are reviewed. The focus is on the use of these models as a rationale for the formulation of microemulsions with suitable features. Finally, current achievements and challenges of the use of microemulsions are reviewed.
Keywords:
microemulsions
wormlike micelles
packing parameter
flexible surface model
hydrophilic-lipophilic difference (HLD)
net average curvature (NAC)
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