Sucrose alkanoates

Kakiuehi et al. [84] studied the adsorption properties of two types of nonionic surfactants, sorbitan fatty acid esters and sucrose alkanoate, at the water-nitrobenzene interface. These surfactants lower the interfacial capacity in the range of the applied potential with no sign of desorption. On the other hand, the remarkable adsorption-desorption capacity peak analogous to the adsorption peak seen for organic molecules at the mercury-electrolyte interface can be observed in the presence of ionic surfactants, such as triazine dye ligands for proteins [85]. 

Nakamura, N., Yamaguchi, Y., Hakansson, B., Olsson, U., Tagawa, T. and Kunieda, H. (1999) Formation of microemulsion and liquid crystal in biocompatible sucrose alkanoate systems. J. Disp. Sci. Technol., 20, 535. 

Kunieda s group reported numerous viscoelastic worm-like micellar systems in the salt-free condition when a lipophilic nonionic surfactant such as short hydrophilic chain poly(oxyethylene) alkyl ether, C EOni, or N-hydroxyethyl-N-methylaUcanolamide, NMEA-n, was added to the dilute micellar solution of hydrophilic cationic (dodecyltrimethylammonium bromide, DTAB and hexade-cyltrimethylammonium bromide, CTAB) [12-14], anionic (sodium dodecyl sulfate, SDS [15, 16], sodium dodecyl trioxyethylene sulfate, SDES [17], and Gemini-type [18]) or nonionic (sucrose alkanoates, C SE [9, 19], polyoxyethylene cholesteryl ethers, ChEO [10, 20], polyoxyethylene phytosterol, PhyEO [11, 21] and polyoxyethylene sorbitan monooleate, Tween-80 [22]) surfactants. The mechanism of formation of these worm-Hke stmctures and the resulting rheological behavior of micellar solutions is discussed in this section based in some actual published and unpublished results, but conclusions can qualitatively be extended to aU the systems studied by Kunieda s group. 

Kunieda, H., Ushio, N., Nakano, A., and Miura, M. (1993) Three-phase behavior in a mixed sucrose alkanoate and polyethyleneglycol alkyl ether system. J. Colloid Interface Sd., 159, 37 4. 

Aramaki, K., KaWr, H., Nakamura, N., and Kunieda, H. (2001) Formation of oil swollen cubic phase or cubic-phase microemulsion in sucrose alkanoate systems. Colloids Surf. A, 183-185, 371-379. 

Formation and disruption of viscoelastic wormlike micellar networks in the mixed-surfactant systems of sucrose alkanoate and polyoxyethylene alkylether. J. Phys. Chem. B., 108, 14009-14015. 

Effect of C12EOn mixed-surfactant systems on the formation of viscoelastic wormlike micellar solutions in sucrose alkanoate- and CTAB-water systems. Colloid Surf A, 279,113-120. 

Formation of microemulsion and liquid crystal in biocompatible sucrose alkanoate systems. J. Dispersion Sci. Technol. 20, 535-557. 

The subject of the physicochemical properties of a number of sugar ester surfactants was reviewed relatively recently by Soderman and Johansson [87]. In particular, the solution behavior of lactose and lactitol esters was discussed, as was ability of the sucrose alkanoates to stabilize temperature-insensitive microemulsions. The article covered the more general subject of polyhydroxylated surfactants, generally concluding that while the knowledge of these systems is certainly growing, there is a great deal of work to be done to understand the behavior of these types of surfactants. 

The subject of sucrose alkanoates and alkanoylglucosides was also included in the review of sugar surfactants by Fukada [88]. 

The microstructure of sucrose alkanoate single-phase microemulsion, with a short-chain hexanoate ester as the oil, has been studied in some detail by Bolzinger-Thevenin et al. using freeze fracture micrography and SANS [103]. The microstructure of the Winsor IV single-phase region was shown... 

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