| Abstrakt: |
The phase behavior was investigated in water/phytoglycogen/water-soluble nonionic surfactant (poly(oxyethylene) type surfactant, CmEOn) systems, showing that phytoglycogen is precipitated by the addition of those surfactants. Therefore, the effect of the hydrophile–lipophile balance (HLB) on the dispersion stability of phytoglycogen (DSP) was assessed.At constant-temperature, phytoglycogen in a lower HLB surfactant system dispersed more stably than that in a higher HLB surfactant system. With raising the temperature, the DSP in the higher HLB surfactant system was improved, whereas phytoglycogen became to disperse unstably in a low-HLB surfactant (C12EO7) system. In the C12EO9and C12EO10systems, the DSP was improved over a range of lower temperatures, whereas phytoglycogen became to disperse unstably over a range of higher temperatures. We proposed a schematic representation on the phase behavior in water/phytoglycogen/nonionic surfactant systems. It was clarified that DSP in phytoglycogen and surfactant-coexisting systems depends on the HLB and the aggregation number of each surfactant. Furthermore, the characteristics of surfactant micelles in water were evaluated macroscopically from the investigation. |
