Abstract: A thermodynamic equation of state (EOS) for uncharged microemulsion system is established by combining the modified Carnahan-Starling equation and Hamaker equation, which describes the attractive interaction between droplets. By using this EOS, phase equilibrium properties of uncharged microemulsion systems are studied. The osmotic pressures of n-dodecylpentaoxyethylene ether(C₁₂E₅)-decane-water microemulsion system are calculated and predicted. The liquid-liquid equilibria volume fractions of sodium bis(2-ethylhexyl)sulfosuccinate(AOT)-octane-water and sodium bis(2-ethylhexyl)sulfosuccinate-decane-water microemulsion systems are calculated. The results are satisfactory.

Key words:

微乳液, 液滴变形, 渗透压, 液液相平衡, 状态方程

摘要： 基于液滴变形模型，结合改进的Carnahan-Starling方程和适用于描述液滴吸引作用的Hamaker方程建立了一个微乳液体系的状态方程.运用所建立的状态方程研究了不带电微乳液体系的相平衡性质，并计算了十二烷基五氧乙烯醚-正癸烷-水体系O/W型微乳液渗透压以及二(2-乙基己基)磺酸基琥珀酸钠-正辛烷-水和二(2-乙基己基)磺酸基琥珀酸钠-正癸烷-水体系W/O型微乳液的液液相平衡，结果令人满意.

关键词:

微乳液, 液滴变形, 渗透压, 液液相平衡, 状态方程