Effect of sucrose on the structure of a cubic phase formed from a monoolein/water mixture.
The effect of sucrose on the structure of molecular assemblies formed in an MO/H2O mixture has been studied using a small-angle X-ray scattering method. It was found that the phase transition Ia3d --> Pn3m --> H(II) occurs with increased sucrose concentration in the mixture with the composition 70 wt% MO at 20 degrees C. This structural change induced by sucrose addition would be ascribed to a cosmotropic property of sucrose, which leads to the dehydration of the MO head group and hence causes a decrease in the effective area occupied by the MO molecule at the polar/apolar interface, which facilitates the formation of molecular assemblies with a high curvature for the reversed liquid-crystal mesophase.
Wang
Zhining
Z
Key Laboratory of Colloid and Interface Chemistry, Shandong University, Ministry of Education, Jinan, 250100, People's Republic of China.
Zheng
Liqiang
L
Inoue
Tohru
T
D005989:Glycerides / Q000737:chemistry*; D012542:Scattering, Radiation; D012680:Sensitivity and Specificity; D013395:Sucrose / Q000737:chemistry*; D013499:Surface Properties; D014867:Water / Q000737:chemistry; D014965:X-Rays
D005989:Glycerides; D014867:Water; D013395:Sucrose; C005953:monoolein