1-Butanol and 3,3-dimethyl-1-butanol as cosurfactants of the laurylsulfobetaine/water system

Physicochemical investigations of microemulsification of eucalyptus oil and water using mixed surfactants (AOT+Brij-35) and butanol

“…Alcohols are reported to be located between the surfactant molecules near the head Table 3 Thermodynamic parameters for viscous flow of the system AOT/Brij-35/1-butanol/EO/water a at different mixing ratios (R) of AOT and Brij-35 (w/w) at 303 K groups. But for branched chain alcohols, this configuration is less feasible due to steric difficulty [44]. This might also contribute to the observed result.…”

The effect of structural variation of alcohols on water solubilization in nonionic microemulsions

“…[14]). From the published phase diagrams we have evaluated for 1-butanol (F b = 0) A T = 47.4%, whereas for 3,3-dimethyl-1-butanol (F b = 1.00) A T = 15.2%.…”

“…[3]) demonstrating the effect modified cosurfactants in determining the solubilization behavior of quaternary surfactant-based systems. The effect of branched alcohols on oil and water solubilization in such systems has been investigated in several studies [7][8][9][10][11][12][13][14][15], although A T could be evaluated by us for only some of the systems studied [12][13][14]. In light of the intricate factors involved, it is understandable that the behavior of such systems can hardly be predicted.…”

Glucose-induced sphere to ellipsoid transition of polyoxyethylene–polyoxypropylene block copolymer micelles in aqueous solutions

“…by the nonionic surfactants polyoxyethylene(5)-dodecylether [1], polyoxyethylene(6)-hexadecylether [2,3], and sucrose laurate [4] change shape from sphere to rod with increasing temperature. The micelle shape can also be affected by varying the solvent properties [5][6][7][8][9][10][11][12][13]. The synergistic effects of solvent quality and temperature can be very important in modulating the self-assembly of nonionic amphiphiles in aqueous solutions.…”

“…It has been reported that the micelle shape can change from sphere to ellipse or rod by the addition of alcohols (such as butanol, pentanol, hexanol, heptanol, octanol or benzyl alcohol) to aqueous solutions of ionic surfactants (such as sodium dodecyl sulfate or dodecyltrimethylammonium bromide [6][7][8][9]), nonionic surfactants (such as alkyl glucoside [10] or polyoxyethylene (23) lauryl ether [11]), or betaine surfactants (such as laurylsulfobetaine [12]). It is also known that the addition of glycerol or sorbitol to nonionic surfactants such as monoalkyl polyoxyethylene glycols can change the micelle shape from sphere to rod, with a length that increases at first with temperature and then decreases close to the surfactant cloud point (i.e., macroscopic phase separation) [13].…”