Microemulsions containing fluorinated oils are, in general, prepared by mixing water, the perfluorinated oil, and a fluorinated surfactant which may be either ionic or non-ionic. In this paper we describe our study of the phase behavior of three dilterent fluorinated oils in mixtures with water and n-fluoroalkyl polyglycol ether. Furthermore, our experiments show that replacing fluorinated surfactants by mixtures of fluorinated and hydrogenated surfactants (up to a 25% weight ratio of hydrogenated to fluorinated surfactant) leads to microemulsion formation with a variety of fluorinated oils. The ratio of the two types of surfactant and the chain length of the added hydrogenated surfactant are ideal parameters with which either to increase the efficiency of the amphiphile blend or to control the temperature of microemulsion formation. The experimental results point to general rules governing the phase behavior of microemulsions of fluorinated oils and mixtures of hydrogenated and fluorinated surfactants.
|Original language||English (US)|
|Number of pages||10|
|Journal||Colloids and Surfaces A: Physicochemical and Engineering Aspects|
|State||Published - Apr 18 1994|
Bibliographical noteFunding Information:
This work was supported financially by Alliance Pharmaceutical Corporation (San Diego, CA) and the State of Delaware Research Partnership. K.V.S. thanks the Max-Planck-Society, Mtinchen, for financial support. We are indebted to H. Assmus for drawing the figures.
- Mixed surfactants
- Phase behavior