The phase behavior of mixtures of water, alkyl ethylene glycol ethers (CkOC2OCk) and n-alkyl β-D-glucopyranosides (CmG1) is systematically reported as a function of temperature and composition. Previous work has shown that CmG1 are nearly insoluble in alkanes, and ternary mixtures of water-alkane-CmG1 produce stable emulsions. Replacing alkanes with more hydrophilic alkyl ethylene glycol ethers increases the solubility of CmG1 in the oil. The well-known 2-3-2 phase sequence is observed in water-CkOC2-OCk-CmG1 mixtures with increasing temperature, indicating that CmG1's partition into the oil at higher temperatures. This microemulsion phase behavior closely resembles that of mixtures made with water, oil, and other nonionic surfactants, e.g., n-alkyl polyglycol ethers (CiEj), and both tricritical phenomena and general patterns of phase behavior are observed.
|Original language||English (US)|
|Number of pages||7|
|State||Published - Oct 1 1997|