熱量測定による非水溶媒中での両親媒性物質のミセル形成過程の研究
1992 年 41 巻 2 号 p. 82-90
詳細
1992 年 41 巻 2 号 p. 82-90
Calorimetric studies have been applied for the solutions of (amphiphiles + r·H2O + hydrocarbons) to investigate the aggregation process of polyoxyethylene glycol monodecyl ether (C10En) and Aerosol OT (AOT) in nonaqueous media. From the heat capacity measurements the shifting processes in the equilibrium between monomeric solutes and aggregates which occur with increasing molality of amphiphiles were detected. From the measurements of enthalpy of dilution the stabilization due to the formation of aggregates were observed.
The aggregation process of C10En depends on the length of oxyethylene and also on the solvents. On the other hand, AOT forms only small size of aggregates and the interaction energy of which is very small in cyclohexane. However, by adding small amount of water to those amphiphiles swollen micelles are formed, and passing through a critical molality microemultion is formed. Thermal properties and the aggregation process of amphiphiles which depends strongly on solvents and the addition of water are described.
