Phase behaviour of alkyl polyglucosides in combination with fatty alcohols and alkyl sulphates

The Effect of Anomeric Head Groups, Surfactant Hydrophilicity, and Electrolytes onn-Alkyl Monoglucoside Microemulsions

“…Sections at Constant C 10 ␤G 1 and C 10 ␤G 1 /C 10 G 2 Concentrations with Varying ␣ Figure 7 shows a phase diagram for the water-C 3 OC 2 OC 3 -C 10 ␤G 1 (top) and water-C 3 OC 2 OC 3 -C 10 ␤G 1 -C 10 G 2 (␦ ϭ 25) (bottom) mixtures as a function of temperature and oil concentration (␣) for ␥ ϭ 5. Again, when two surfactants (C and D) are used, ␥ ϭ (C ϩ D)/ ( A ϩ B ϩ C ϩ D).…”

“…ϫ 100 (in wt%); [2] and (iii) the mass ratio of surfactant 2 (D) to surfactant 1 (C) in the mixture, ␦, defined as…”

“…Despite these desirable properties, only recently have alkyl polyglucosides become economically competitive and therefore the focus of more detailed study. There is very little experimental data available about mixtures containing C m G n , (2)(3)(4)(5)(6)(7)(8)(9)(10)(11)(12), with even fewer reports of C m G n microemulsions. The majority of these studies show some of the roles of alcohols and cosurfactants on the phase behavior of water-oil-C m G n mixtures (13)(14)(15)(16)(17)(18)(19).…”

“…At low temperatures C i E j 's are dissolved mainly in water and the two-phase region consists of a surfactant-rich water phase in equilibrium with an excess oil phase (2). At high temperatures, C i E j 's are more soluble in oil and form a surfactant-rich oil phase in equilibrium with an excess water phase (2 ). In this notation the bar denotes the phase in which the surfactant is mainly dissolved.…”

“…The three-phase body, consisting of a middle-phase microemulsion in equilibrium with excess oil and water phases, is surrounded by two-phase regions. At low temperatures C i E j 's are dissolved mainly in water and the two-phase region consists of a surfactant-rich water phase in equilibrium with an excess oil phase (2). At high temperatures, C i E j 's are more soluble in oil and form a surfactant-rich oil phase in equilibrium with an excess water phase (2 ).…”